CN117930003A

CN117930003A - Unmanned aerial vehicle motor service life testing method, processing device and testing equipment

Info

Publication number: CN117930003A
Application number: CN202410326919.3A
Authority: CN
Inventors: 周鑫; 吴小光; 吴敏; 李毅
Original assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Current assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Priority date: 2024-03-21
Filing date: 2024-03-21
Publication date: 2024-04-26
Anticipated expiration: 2044-03-21
Also published as: CN117930003B

Abstract

The application provides a testing method, a processing device and testing equipment for service life of an unmanned aerial vehicle motor. The testing method comprises the following steps: and acquiring reference information of the motor to be tested in a preset time period. And acquiring actual operation information of the motor to be tested, which takes the reference information as simulation operation information, in a preset time period at each interval. And judging whether the operation error value is in a preset error range, wherein the operation error value is the ratio of the absolute value of the difference value of the actual operation information and the reference information to the reference information. And obtaining the qualification ratio. Judging whether the qualification ratio is in a preset qualification range. And when the qualification ratio is not in the preset qualification range, judging that the motor to be tested is in a damaged state and stopping testing. The testing method for the service life of the unmanned aerial vehicle motor can compare the actual operation information acquired in each preset time period with the reference information, and timely judge the actual use state of the motor to be tested so as to select to stop testing or finish motor type selection, thereby reducing testing cost and improving testing efficiency.

Description

Unmanned aerial vehicle motor service life testing method, processing device and testing equipment

Technical Field

The application belongs to the technical field of unmanned aerial vehicle equipment, and particularly relates to a testing method, a processing device and testing equipment for service life of an unmanned aerial vehicle motor.

Background

On the selection of motors for unmanned aerial vehicles, the service life of the motors is an important assessment index. The current scheme for testing the service life of the unmanned aerial vehicle motor is actual flight or bench test. In order to verify the data, the unmanned aerial vehicle is required to actually accumulate flight for 2000 hours, or 2000 frames are required for 1 hour per frame, a large amount of time, manpower and material resources are required for accumulation, so that the test cost is high and the test efficiency is low.

Disclosure of Invention

In view of this, a first aspect of the present application provides a method for testing the service life of an unmanned aerial vehicle, the method comprising:

acquiring reference information of a motor to be tested in a preset time period, wherein the reference information is obtained by testing the motor to be tested in an unmanned aerial vehicle;

Acquiring actual operation information of the motor to be tested, which takes the reference information as simulation operation information, in each preset time period, wherein the actual operation information is obtained by simulating that the motor to be tested is arranged in a testing device; the reference information comprises a plurality of sub-reference information obtained at different testing time points in the preset time period, the actual operation information comprises a plurality of sub-operation information obtained at different testing time points in the preset time period, the plurality of sub-reference information corresponds to the testing time points of the plurality of sub-operation information respectively, and the number of the sub-reference information is equal to the number of the sub-operation information;

Judging whether an operation error value in each interval of the preset time period is in a preset error range or not, wherein the operation error value is the ratio of the absolute value of the difference value of the actual operation information and the reference information to the reference information; judging whether the operation error values of the sub-operation information and the sub-reference information corresponding to each item are within the preset error range or not respectively;

obtaining a qualification ratio, wherein the qualification ratio is the quantity ratio of the information qualification number to the sub-reference information, and the information qualification number is the item number ratio of the operation error value of the sub-operation information and the sub-reference information in the preset error range;

judging whether the qualification ratio is in a preset qualification range or not;

when the qualification ratio is not in the preset qualification range, judging that the motor to be tested is in a damaged state and stopping testing;

And acquiring a test time period of the motor to be tested to obtain the service life of the motor to be tested.

According to the testing method provided by the first aspect of the application, the reference information of the motor to be tested in the preset time period can be obtained, and a basis is provided for the follow-up simulation of the motor to be tested. And then, acquiring actual operation information taking the reference information as simulation operation information, and providing a basis for subsequently comparing the actual operation information with the reference information and judging the use state of the motor to be tested.

And then, judging whether the motor to be tested is in a damaged state or not by comparing whether the operation error value is in a preset error range or not and obtaining the operation error value by the ratio of the absolute value of the difference value of the actual operation information and the reference information to the reference information. When the operation error value is not in the preset error range, the motor to be tested cannot meet the requirement that the motor to be tested is mounted on the unmanned plane for actual flight.

The actual operation information can be acquired in preset time periods at intervals, so that the actual operation information in each preset time period can be compared with the reference information in time, an operation error value can be obtained in time, and the latest actual use state of the motor to be tested along with the increase of the test time can be judged.

And by comparing the qualification ratio with the preset qualification range and judging whether the running error values of most different test time points are in the preset error range in the preset time period, the actual use state of the motor to be tested in most of the time in the preset time period can be judged, and the test accuracy is improved. If the actual running state of the motor to be tested in most of the time within the preset time period has a larger phase difference with the simulated running state, the motor to be tested is in a damaged state, and the requirement that the motor to be tested is mounted on the unmanned plane for actual flight cannot be met, so that the test can be stopped, the test cost is reduced, and the test efficiency is improved.

In summary, the method for testing the service life of the unmanned aerial vehicle motor provided by the application can compare the actual operation information acquired in each preset time period with the reference information to timely obtain the operation error value, and judge the actual use state of the motor to be tested by matching with the qualification ratio so as to select to stop the test or finish the motor model selection, thereby reducing the test cost and improving the test efficiency.

Wherein the actual operation information includes initial operation information; the step of judging whether the operation error value in the preset time period at each interval is in a preset error range or not includes:

Judging whether an initial operation error value is within the preset error range, wherein the initial operation error value is the ratio of the absolute value of the initial operation information and the reference information difference value to the reference information;

And when the initial operation error value is in the preset error range, acquiring the later operation information of the motor to be tested, which takes the reference information as the simulation operation information, again.

After the step of acquiring the later-stage operation information of the motor to be tested by taking the reference information as the simulation operation information again, the method further comprises the following steps:

Judging whether a later operation error value is in the preset error range or not, wherein the later operation error value is the ratio of the absolute value of the later operation information to the reference information difference value to the reference information;

When the later operation error value is within the preset error range, acquiring an expected service life value of the motor and a minimum time value in a later test time period of the later operation information;

judging whether the expected service life value is smaller than the minimum time value;

and when the expected service life value is smaller than the minimum time value, judging that the motor to be tested is in a qualified state and stopping testing.

The initial operation error value comprises a plurality of operation error values in the preset time period, and the operation error values in the preset time period are all in a preset error range; before the step of acquiring the later-stage operation information of the motor to be tested by taking the reference information as the simulation operation information again, the method further comprises the following steps:

acquiring a plurality of operation error values in the preset time period, and calculating to obtain an increase value of the operation error value in one preset time period;

Calculating to obtain an estimated test time when the motor to be tested continues to be tested according to the increment value by taking the operation error value in one preset time period as an initial value, so as to obtain an estimated service life of the motor to be tested, wherein the estimated service life is equal to the sum of the estimated test time and the test time of the motor to be tested in one preset time period.

After the step of obtaining the estimated service life of the motor to be tested, the method further comprises the following steps:

Acquiring an expected service life value of a motor;

judging whether the difference value between the expected service life value and the estimated service life is within an estimated error range;

Stopping the test when the difference value between the expected service life value and the estimated service life is not within the estimated error range;

And when the difference value between the expected service life value and the estimated service life is within the estimated error range, continuing the test.

The preset time periods comprise a front preset time period, a middle preset time period and a rear preset time period which are arranged in time sequence, wherein the minimum value of the front preset time period is the minimum value in the preset time periods; the step of obtaining the increment value comprises the following steps:

and acquiring the operation error value of the pre-set time period and the middle-set time period, and calculating to obtain the increment value.

The preset time period comprises a take-off time period, a hover time period and a landing time period which are arranged in time sequence; the step of judging whether the operation error values of the sub-operation information and the sub-reference information corresponding to each item are within the preset error range respectively includes:

acquiring a basic error range and a correction value;

judging whether the test time point of the sub-operation information is matched with the take-off time period, the hovering time period and the landing time period;

When the test time point of the sub-operation information is matched with the take-off time period, a take-off error range is obtained as the preset error range, the minimum value of the take-off error range is the minimum value of the basic error range, and the maximum value of the take-off error range is the sum of the maximum value of the basic error range and the correction value;

When the test time point of the sub-operation information is matched with the hover time period, acquiring a hover error range as the preset error range, wherein the minimum value of the hover error range is the minimum value of the basic error range, and the maximum value of the hover error range is the difference between the maximum value of the basic error range and the correction value;

And when the test time point of the sub-operation information is matched with the falling time period, acquiring a falling error range as the preset error range, wherein the minimum value of the falling error range is the minimum value of the basic error range, and the maximum value of the falling error range is the sum of the maximum value of the basic error range and the correction value.

The reference information comprises a reference rotating speed, a reference load, reference vibration, a reference deflection angle and a reference temperature of the motor to be tested, and the actual operation information comprises an operation rotating speed, an operation load, operation vibration, an operation deflection angle and an operation temperature of the motor to be tested;

the step of judging whether the operation error value in the preset time period at each interval is in a preset error range or not includes:

Judging whether the operation error value of the operation rotating speed and the reference rotating speed is in a first preset error range, judging whether the operation error value of the operation load and the reference load is in a second preset error range, judging whether the operation error value of the operation vibration and the reference vibration is in a third preset error range, judging whether the operation error value of the operation deflection angle and the reference deflection angle is in a fourth preset error range, and judging whether the operation error value of the operation temperature and the reference temperature is in a fifth preset error range;

when the operation error value of any one of the actual operation information and the reference information is not in the preset error range, judging that the motor to be tested is in the damaged state and stopping testing.

The number of the preset time periods is multiple, the multiple preset time periods are arranged in time sequence, and the motors to be tested have different reference information in each preset time period; the step of obtaining the reference information of the motor to be tested in the preset time period comprises the following steps:

acquiring a preliminary test time period of the motor to be tested;

judging whether the preliminary test time period is matched with any one of a plurality of preset time periods or not;

when the preliminary test time period is matched with any preset time period, acquiring reference information of the preset time period matched with the preliminary test time period as target reference information;

acquiring target operation information of the motor to be tested, wherein the target reference information is used as simulation operation information;

And judging whether a target operation error value is in the preset error range, wherein the target operation error value is the ratio of the absolute value of the difference value of the target operation information and the target reference information to the target reference information.

The number of scenes for acquiring the reference information is multiple, and the motors to be detected have different reference information under each scene; the step of obtaining the reference information of the motor to be tested in the preset time period comprises the following steps:

Acquiring a test environment parameter of the motor to be tested;

judging whether the test environment parameters are matched with any scene environment parameters in a plurality of scenes or not;

When the test environment parameter is matched with any scene environment parameter, acquiring the reference information of the scene environment matched with the test environment parameter as target reference information;

And judging whether a target operation error value is within the preset error range, wherein the target operation error value is the ratio of the absolute value of the difference value of the target operation information and the target reference information to the target reference information.

The reference information comprises a plurality of sub-reference information obtained at different test time points in the preset time period; the step of obtaining the actual operation information of the motor to be tested by taking the reference information as the simulation operation information comprises the following steps:

Acquiring a reference operation curve of the motor to be tested in the preset time period, wherein the reference operation curve is obtained according to the multiple sub-reference information;

and acquiring the actual operation information of the motor to be tested, wherein the actual operation information takes the reference operation curve as the simulation operation information.

A second aspect of the present application provides a processing apparatus comprising:

the acquisition unit is used for acquiring reference information of the motor to be tested in a preset time period, wherein the reference information is obtained by testing the motor to be tested in the unmanned plane; the device is also used for acquiring actual operation information of the motor to be tested, which takes the reference information as simulation operation information, in each preset time period, wherein the actual operation information is obtained by simulating that the motor to be tested is arranged in a testing device; the reference information comprises a plurality of sub-reference information obtained at different testing time points in the preset time period, the actual operation information comprises a plurality of sub-operation information obtained at different testing time points in the preset time period, the plurality of sub-reference information corresponds to the testing time points of the plurality of sub-operation information respectively, and the number of the sub-reference information is equal to the number of the sub-operation information; the qualification ratio is the quantity ratio of the information qualification number to the sub-reference information, and the information qualification number is the item number ratio of the operation error value of the sub-operation information and the sub-reference information in the preset error range; the method is also used for obtaining the test time period of the motor to be tested so as to obtain the service life of the motor to be tested;

The judging unit is used for judging whether the operation error value in the preset time period at each interval is in a preset error range or not, wherein the operation error value is the ratio of the absolute value of the difference value of the actual operation information and the reference information to the reference information; judging whether the operation error values of the sub-operation information and the sub-reference information corresponding to each item are within the preset error range or not respectively; the method is also used for judging whether the qualification ratio is in a preset qualification range or not; when the qualification ratio is not in the preset qualification range, the judging unit is further used for judging that the motor to be tested is in a damaged state;

and the control unit is used for controlling the testing device to stop testing when the motor to be tested is in the damaged state.

According to the processing device provided by the second aspect of the application, the acquisition unit, the judging unit and the control unit are mutually matched, the actual operation information acquired in each preset time period is compared with the reference information, the latest operation error value is timely obtained, and the actual use state of the motor to be tested is judged by matching with the qualification ratio, so that the stop test is selected or the motor model selection is completed, the test cost is reduced, and the test efficiency is improved.

The third aspect of the application provides a test device, which comprises a test device and a processing device electrically connected with the test device, wherein the test device is used for testing a motor to be tested, and the test device is used for executing the test method of the service life of the unmanned aerial vehicle motor provided by the first aspect of the application.

According to the test equipment provided by the third aspect of the application, by executing the test method for the service life of the unmanned aerial vehicle motor provided by the first aspect of the application, the actual operation information acquired in each preset time period is compared with the reference information, the operation error value is obtained in time, and the actual use state of the motor to be tested is judged by matching with the qualification ratio, so that the test is stopped or the motor model selection is completed, the test cost is reduced, and the test efficiency is improved.

Drawings

In order to more clearly explain the technical solutions in the embodiments of the present application, the drawings that are used in the embodiments of the present application will be described below.

Fig. 1 is a schematic flow chart of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application.

Fig. 2 is a flow chart diagram of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application.

Fig. 3 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the present application.

Fig. 4 is a flow chart of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application.

Fig. 5 is a flowchart of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the present application.

Fig. 6 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the present application.

Fig. 7 is a flow chart of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application.

Fig. 8 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the present application.

Fig. 9 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the present application.

Fig. 10 is a reference running chart of a reference rotational speed according to an embodiment of the present application.

Fig. 11 is a reference operating diagram of a reference load according to an embodiment of the present application.

Fig. 12 is a graph of a reference operation of reference vibration provided in an embodiment of the present application.

FIG. 13 is a graph of reference operation of reference bias angles provided by an embodiment of the present application.

Fig. 14 is a reference operating graph of a reference temperature provided by an embodiment of the present application.

Detailed Description

The following are preferred embodiments of the present application, and it should be noted that modifications and variations can be made by those skilled in the art without departing from the principle of the present application, and these modifications and variations are also considered as the protection scope of the present application.

Unless otherwise indicated or contradicted, terms or phrases used in the present application have the following meanings:

in the present application, "first," "second," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In the present application, "one or more" means any one, any two or more of the listed items. Wherein "several" means any two or more.

Referring to fig. 1, fig. 1 is a flow chart of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application. The embodiment provides a method for testing the service life of an unmanned aerial vehicle motor, which comprises S100, S200, S300 and S400. Among them, S100, S200, S300, S400 are described in detail below.

S100, acquiring reference information of a motor to be tested in a preset time period, wherein the reference information is obtained by testing the motor to be tested in an unmanned aerial vehicle.

And the motor to be tested is arranged on the unmanned aerial vehicle, and information of the motor to be tested, which is obtained by the unmanned aerial vehicle in actual flight, is obtained to be used as reference information. Optionally, the number of preset time periods is one or more. Alternatively, a preset time period t may be 30 min.ltoreq.t.ltoreq.3h. Further alternatively, a preset time period may be 30min, or 45min, or 1h, or 1.5h, or 2h, or 2.5h, or 3h, etc.

Optionally, the reference information includes a reference rotation speed, a reference load, a reference vibration, a reference deflection angle, and a reference temperature of the motor to be measured. Further alternatively, the reference rotational speed is acquired by a feedback rotational speed of the electronic governor. The reference load is obtained by controlling given throttle signals and rotating speeds through unmanned aerial vehicle flight, and corresponding to test data of the motor with paddles on the rack. The reference vibration is acquired by a vibration sensor. The reference deflection angle is the flying deflection angle of the unmanned aerial vehicle in the flying process obtained according to the level meter. The reference temperature is obtained by transmitting data back to the temperature measuring instrument through a built-in temperature sensor of the motor.

In one embodiment, the reference data is obtained through data acquisition in single flight of the unmanned aerial vehicle in a preset time period, the reference data is used as simulation operation information, the simulation working condition of the single flight of the unmanned aerial vehicle is simulated, and support is provided for the follow-up acquisition of the actual operation information of the motor to be tested, which is simulated by the testing device. In other words, the preset time period is one, and the reference information in the preset time period is taken as the simulation running information.

S200, acquiring actual operation information of the motor to be tested, which takes the reference information as simulation operation information, in each preset time period, wherein the actual operation information is obtained by simulating that the motor to be tested is arranged in a testing device; the reference information comprises a plurality of sub-reference information obtained at different testing time points in the preset time period, the actual operation information comprises a plurality of sub-operation information obtained at different testing time points in the preset time period, the plurality of sub-reference information corresponds to the testing time points of the plurality of sub-operation information respectively, and the number of the sub-reference information is equal to the number of the sub-operation information.

And taking the reference information as simulation operation information, controlling the motor to be tested to install the simulation operation information, and monitoring the motor to be tested in real time to acquire actual operation information. The use state of the motor to be tested may be damaged along with the increase of the test time, so that the actual running state of the motor to be tested has a larger phase difference with the simulated running information; the use state of the motor to be tested can also be kept normal, so that the actual running state of the motor to be tested has smaller phase difference with the simulated running information.

And acquiring actual operation information of the motor to be tested by taking the reference information as simulation operation information in the preset time period at intervals, wherein the test operation time period of the actual operation information acquired each time is the same as the preset time period. For example, when the preset time period of the parameter data is 1h, the actual running information of the motor to be tested in 1h is acquired at 1h intervals. In other words, at test time nodes with test time of 0h-1h, 1h-2h, 2h-3h, 3h-4h and the like, the actual running information of the motor to be tested in every 1h is obtained.

Optionally, the interval time between any adjacent test time points is the same. Optionally, the interval time between at least two adjacent test time points is different.

For example, the preset time period is 1h, and the test time points are respectively 10min, 20min, 30min, 40min, 50min and 60min. For another example, the preset time period is 1h, and the test time points are respectively 10min, 30min and 60min.

S300, judging whether an operation error value in the preset time period at each interval is in a preset error range or not, wherein the operation error value is the ratio of the absolute value of the difference value of the actual operation information and the reference information to the reference information; and judging whether the operation error values of the sub-operation information and the sub-reference information corresponding to each item are within the preset error range or not respectively.

The preset error range can be adjusted according to the use scene of the unmanned aerial vehicle and the model of the motor to be detected. Optionally, the actual operation information includes an operation rotation speed, an operation load, an operation vibration, an operation drift angle, and an operation temperature of the motor to be tested.

Alternatively, the preset error range e may be 0< e.ltoreq.1%, or 0< e.ltoreq.2%, or 0< e.ltoreq.3%, or 0< e.ltoreq.4%, or 0< e.ltoreq.5%, or 0< e.ltoreq.6%, or 0< e.ltoreq.7%, etc.

For example, the reference rotation speed is 2000rpm, the preset error range e is 0 < e.ltoreq.4%, and if the operation rotation speed is 2092rpm, the operation error value is 4.6%, and the operation error value is not in the preset error range; if the running rotating speed is 1911rpm, at the moment, the running error value is 4.45%, and the running error value is not in the preset error range; if the running rotation speed is 2015rpm, the running error value is 0.75% at this time, and the running error value is within the preset error range.

For example, when the preset time period of the parameter data is 1h, the operation error value obtained from the actual operation information within the test time of 0h to 1h is compared with the preset error range, the operation error value obtained from the actual operation information within the test time of 1h to 2h is compared with the preset error range, the operation error value obtained from the actual operation information within the test time of 2h to 3h is compared with the preset error range, and the like.

The corresponding sub-operation information and sub-reference information refer to the same information as the test time point. For example, sub-operation information having a test time point of 10min corresponds to sub-reference information having a test time point of 10 min. For another example, sub-operation information at a test time point of 30min corresponds to sub-reference information at a test time point of 30 min.

The operation error value of each item of corresponding sub-operation information and sub-reference information refers to the ratio of the absolute value of the difference value of the sub-operation information and the corresponding reference information to the corresponding reference information. For example, the ratio of the absolute value of the difference between the sub-operation information at the test time point of 10min and the sub-reference information at the test time point of 10min to the sub-reference information at the test time point of 10 min.

S400, obtaining a qualification ratio, wherein the qualification ratio is the quantity ratio of the information qualification number to the sub-reference information, and the information qualification number is the item number ratio of the operation error value of the sub-operation information and the sub-reference information in the preset error range.

Optionally, the number of sub-reference information is 4-10. The number of sub-reference information is equal to the number of sub-run information.

For example, the number of sub-reference information and sub-operation information is 6, respectively, and the sub-reference information and the test time point of the sub-operation information correspond, respectively. The operation error values of the 4 pieces of sub-operation information and the sub-reference information are in the preset error range, and the operation error values of the 2 pieces of sub-operation information and the sub-reference information are not in the preset error range, so that the information qualification number is 4, and the qualification ratio is 66.7%.

For another example, the number of sub-reference information and sub-operation information is 6, and the sub-reference information and the test time point of the sub-operation information correspond to each other. And if the operation error values of the 3 pieces of sub-operation information and the sub-reference information are not in the preset error range, the information qualification number is 3, and the qualification ratio is 50%.

S500, judging whether the qualification ratio is in a preset qualification range.

Optionally, the preset pass range is 60% -100%. Further alternatively, the preset pass range may be 60%, or 65%, or 70%, or 75%, or 80%, or 85%, or 90%, or 95%, or 100%, etc.

And S600, when the qualification ratio is not in the preset qualification range, judging that the motor to be tested is in a damaged state and stopping testing.

S700, acquiring a test time period of the motor to be tested to obtain the service life of the motor to be tested.

For example, after the test time period is 300h-301h, the motor to be tested is in a damaged state and the test is stopped, so that the service life of the motor to be tested is 301h.

When the qualification ratio is not in the preset qualification range, the motor to be tested is in a damaged state, so that the actual running state of the motor to be tested has a larger phase difference with the state of the simulated running, the requirement of the actual flight state of the unmanned aerial vehicle cannot be met, and the test can be stopped.

In addition, when the operation error value is in the preset error range, the motor to be tested is in a normal use state, the actual operation state of the motor to be tested has smaller phase difference with the state of the simulated operation, the requirement of the actual flight state of the unmanned aerial vehicle can be met, and the test can be continued until the motor to be tested is damaged or the expected service life value is met.

Specifically, the test method provided by the embodiment can acquire the reference information of the motor to be tested in the preset time period, and provides a basis for the follow-up simulation of the motor to be tested. And then, acquiring actual operation information taking the reference information as simulation operation information, and providing a basis for subsequently comparing the actual operation information with the reference information and judging the use state of the motor to be tested.

In addition, in the embodiment, by comparing the qualification ratio with the preset qualification range, whether the running error values of most different testing time points are in the preset error range or not in the preset time period is judged, the actual use state of the motor to be tested in most of the time in the preset time period can be judged, and the testing accuracy is improved. If the actual running state of the motor to be tested in most of the time within the preset time period has a larger phase difference with the simulated running state, the motor to be tested is in a damaged state, and the requirement that the motor to be tested is mounted on the unmanned plane for actual flight cannot be met, so that the test can be stopped, the test cost is reduced, and the test efficiency is improved.

In addition, when the qualification ratio is in the preset qualification range, the motor to be tested is in a normal use state, the actual running state of the motor to be tested has smaller phase difference with the state of the simulation running, the requirement of the actual flight state of the unmanned aerial vehicle can be met, and the test can be continued until the motor to be tested is damaged or the expected service life value is met.

In summary, the method for testing the service life of the unmanned aerial vehicle motor provided by the embodiment can compare the actual operation information acquired in each preset time period with the reference information to timely obtain the operation error value, and judge the actual use state of the motor to be tested so as to select to stop the test or finish the motor model selection, thereby reducing the test cost and improving the test efficiency.

For example, first, data acquired by the motor to be tested in an actual flight of 1h on the unmanned aerial vehicle is used as reference information. Then, the actual operation information of the motor to be tested, which takes the reference information as the simulation operation information, is obtained within 1h every 1 h. In other words, actual operation information in which the test time is 0h to 1h, 1h to 2h, 2h to 3h, and the like is acquired. And judging whether the operation error value obtained by the actual operation information in 0h-1h, 1h-2h, 2h-3h and the like is in a preset error range. Then, when the operation error value is not in the preset error range, judging that the requirement that the motor to be tested is arranged on the unmanned aerial vehicle for actual flight cannot be met.

Optionally, in one embodiment, the step of determining whether the operation error value in the preset time period at each interval is within a preset error range includes:

and acquiring an operation error value in the preset time period, and judging whether the operation error value in the preset time period is in a preset error range or not.

And when the operation error value in one preset time period is not in the preset error range, judging that the motor to be tested is in the damaged state and stopping testing.

And when the operation error value in one preset time period is within the preset error range, continuing to test, acquiring the actual operation information of the motor to be tested in the preset time period by taking the reference information as the simulation operation information again, and judging whether the operation error value in the preset time period is within the preset error range or not.

For example, the actual operation information in the test time of 0h-1h is obtained, and then, whether the operation error value obtained by the actual operation information in the test time of 0h-1h is in the preset error range is judged. And when the motor to be tested is not in the preset error range within 0h-1h, judging that the motor to be tested is in a damaged state and stopping testing. And when the error is within the preset error range within 0h-1h, judging to continue the test. And then, acquiring actual operation information in the test time of 1h-2h again, and judging whether an operation error value obtained by the actual operation information in the test time of 1h-2h is in a preset error range or not again.

According to the embodiment, the latest actual use state of the motor to be tested along with the increase of the test time can be judged by only acquiring the operation error value in one preset time period each time and judging whether the operation error value is in the preset error range, so that the test accuracy is improved, the test cost is reduced, and the test efficiency is improved.

Optionally, in another embodiment, the step of determining whether the operation error value in the preset time period at each interval is within a preset error range includes:

and acquiring a plurality of operation error values in the preset time periods, and respectively judging whether the operation error values in the preset time periods are in a preset error range or not.

And when the operation error values in at least two preset time periods are not in the preset error range, judging that the motor to be tested is in the damaged state and stopping testing.

For example, the actual operation information with the test time of 0h-1h, 1h-2h and 2h-3h is obtained, and then whether the operation error values obtained by the actual operation information with the test time of 0h-1h, 1h-2h and 2h-3h are in the preset error range is judged. And when at least two of the operation error values in 0h-1h, 1h-2h and 2h-3h are not in the preset error range, judging that the motor to be tested is in a damaged state and stopping testing.

According to the embodiment, the operation error values in a plurality of preset time periods are obtained at one time, and whether the operation error values are in the preset error range or not is judged, so that the actual use state of the motor to be tested in a longer time period can be judged, and the test accuracy is improved. If the actual running state of the motor to be tested in most of the time within the time period has a larger phase difference with the simulated running state, the motor to be tested is in a damaged state, and the requirement that the motor to be tested is mounted on the unmanned plane for actual flight cannot be met, so that the test can be stopped, the test cost is reduced, and the test efficiency is improved.

In addition, if the actual running state of the motor to be tested in most of the time within the time period has smaller phase difference with the simulated running state, the motor to be tested is in a normal use state, and the requirement of the actual flight state of the unmanned aerial vehicle can be met.

Optionally, before the step of obtaining the qualification ratio, the method further includes: and when the operation error values of all the sub-operation information and the sub-reference information are not in the preset error range, judging that the motor to be tested is in the damaged state and stopping testing.

When the operation error values of all the sub-operation information and the sub-reference information are not in the preset error range, the operation error values of all the test time points are not in the preset error range, the actual operation state of the motor to be tested is greatly different from the state of the simulation operation, the motor to be tested is in a damaged state, the requirement of the actual flight state of the unmanned aerial vehicle cannot be met, and the test can be stopped.

According to the embodiment, whether the operation error values of a plurality of different test time points are in the preset error range or not is judged, so that the actual use state of the motor to be tested at each test time point can be judged, and the test accuracy is improved. If the actual running state of the motor to be tested at each test time point is greatly different from the simulated running state, the motor to be tested is in a damaged state, and the requirement that the motor to be tested is arranged on the unmanned aerial vehicle for actual flight cannot be met, so that the test can be stopped, the test cost is reduced, and the test efficiency is improved.

Referring to fig. 1-2 together, fig. 2 is a flow chart of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, the actual operation information includes initial operation information; at S300, the step of determining whether the operation error value in the preset time period at each interval is within a preset error range includes:

S310, judging whether an initial operation error value is in the preset error range, wherein the initial operation error value is the ratio of the absolute value of the initial operation information and the reference information difference value to the reference information.

S320, when the initial operation error value is within the preset error range, acquiring the later operation information of the motor to be tested, which takes the reference information as the simulation operation information, again.

Optionally, when the initial operation error values are not within the preset error range, judging that the motor to be tested is in the damaged state and stopping testing.

The time for acquiring the initial operation information is earlier than the time for acquiring the later operation information. For example, when initial operation information is acquired, the test time of the motor to be tested is 1h-2h; and when the later-stage operation information is acquired, the test time of the motor to be tested is 3-4 h. For another example, when initial operation information is acquired, the test time of the motor to be tested is 1h-3h; and when the later-stage operation information is acquired, the test time of the motor to be tested is 5-7 h. For another example, when initial operation information is acquired, the test time of the motor to be tested is 1h-500h; when the later-period running information is acquired, the test time of the motor to be tested is 1500-2000 h.

According to the method, whether the initial operation error value is in the preset error range or not is judged, the actual use state of the motor to be tested is judged in time by matching with the qualification ratio, and whether the test is continued or stopped is selected, so that the test cost is reduced, and the test efficiency is improved. And when the initial operation error value is within the preset error range, the motor to be tested can be continuously used normally, and the test is continuously carried out to finish the motor model selection. Specifically, the reference information is taken as the later-stage operation information of the simulation operation information by the motor to be tested again, the later-stage operation information is compared with the reference information later, and the actual use state of the motor to be tested which is continuously tested is judged to provide a basis.

Referring to fig. 1-3 together, fig. 3 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, after the step of acquiring the post-operation information of the motor to be tested using the reference information as the simulation operation information again in S320, the method further includes:

S330, judging whether a later operation error value is within the preset error range, wherein the later operation error value is the ratio of the absolute value of the later operation information and the reference information difference value to the reference information.

And S340, when the later operation error value is within the preset error range, acquiring the expected service life value of the motor and the minimum time value in the later test time period of the later operation information.

When the later-period operation error value is in the preset error range, the motor to be tested is indicated to be still in a normal use state after long-time use, and the requirement of the actual flight state of the unmanned aerial vehicle can be met. Therefore, the expected service life value of the motor and the later test time period of the later operation information are obtained, and a basis is provided for comparing the expected service life value with the later test time period and judging whether the service life of the motor to be tested meets the requirement of the unmanned aerial vehicle.

Alternatively, the expected lifetime value L of the motor may be 1500 h.ltoreq.L.ltoreq.2500 h. Further alternatively, the expected lifetime value may be 1500h, or 1700h, or 1900h, or 2000h, or 2100h, or 2300h, or 2500h, etc.

The post test period of the post operation information refers to a test period in which the post operation information is acquired. For example, the test time period for acquiring the later operation information is 1500h-1520h, and the minimum time value in the later test time period is 1500h.

S350, judging whether the expected service life value is smaller than the minimum time value.

And S360, when the expected service life value is smaller than the minimum time value, judging that the motor to be tested is in a qualified state and stopping testing.

For example, the expected service life value is 2000h, if the later test time period is 2110h-2150h, and at this time, the minimum time value in the later test time period is 2110h, and the expected service life value is 2000h and smaller than the minimum time value 2110h, then the service life of the motor to be tested is judged to meet the expected service life value, and the motor to be tested is in a qualified state and stops testing.

According to the embodiment, whether the later operation error value is in the preset error range or not is judged firstly, and the actual use state of the motor to be tested is judged timely. When the later operation error value is in the preset error range, the motor to be tested can be normally used for a long time. And then, acquiring an expected service life value of the motor and comparing the expected service life value with a minimum time value in a later test time period, judging whether the current test time of the motor to be tested is greater than the expected service life value of the motor or not so as to judge whether the motor to be tested is qualified or not, and providing a basis for the actual flight of the unmanned aerial vehicle to finish motor type selection.

Referring to fig. 1 to fig. 4 together, fig. 4 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, the initial operation error value includes operation error values within a plurality of the preset time periods, and the operation error values within the preset time periods are all within a preset error range.

For example, one preset time period is 1h, the initial running time period of the motor to be tested is 0-20h, and a plurality of preset time periods are respectively 0-1h, 1h-2h, 2h-3h, and the like, and 19h-20h. The initial operation error value includes the operation error values for 20 preset time periods, in other words, the initial operation error value includes 20 operation error values. And, 20 operation error values are all in the preset error range, so the motor to be tested is continuously detected by adopting the testing device in the initial operation time period, namely, the motor to be tested is tested for 0-20h.

Before the step of S320 of obtaining the later-stage operation information of the motor to be tested, which uses the reference information as the simulation operation information, the method further includes:

s301, acquiring a plurality of operation error values in the preset time period, and calculating to obtain an increase value of the operation error value in one preset time period.

As the probability of damage of the motor to be tested is gradually increased along with the increase of the test time, the operation error value is also easy to be gradually increased along with the increase of the test time. Wherein the increment value is greater than or equal to zero.

Optionally, the increment value is an absolute value of the difference value of the operation error values in the two preset time periods.

For example, an operating error value of 1.1% for 0-1h and an operating error value of 1.11% for 1h-2h is obtained, and the operating error value increases by 0.01% over a predetermined period of time.

Optionally, the increment value is an average value of a first sub increment value and a second sub increment value, the first sub increment value and the second increment value are absolute values of operation error value differences within two preset time periods, and a time period of at least one operation error value in the first sub increment value is different from a time period of two operation error values in the second sub increment value.

For example, an operational error value of 1h-2h is obtained as 1.11%, an operational error value of 8h-9h is obtained as 1.13%, and the first child-increase value is 0.02%; the operation error value obtained from 1h to 2h is 1.11%, the operation error value obtained from 14h to 15h is 1.12%, the second sub-increment value is 0.01%, and the increment value of the operation error value in a preset time period is 0.015%.

S302, calculating to obtain estimated test time when the motor to be tested continues to be tested according to the increment value by taking the operation error value in one preset time period as an initial value, wherein the operation error value is equal to the maximum value of the preset error range, so as to obtain the estimated service life of the motor to be tested, and the estimated service life is equal to the sum of the estimated test time and the test time of the motor to be tested in one preset time period.

The estimated test time refers to a test time of how long the motor to be tested continues to test, and the running error value can be equal to the maximum value of the preset error range.

For example, the increase value of the operation error value in a preset time period is 0.01%, the initial operation time period of the motor to be tested is 0-20h, and the maximum value of the preset error range is 3% by taking 1.3% of the operation error value of 19-20 h as an initial value, then the estimated test time is 190h after the motor to be tested continues to test for 170h, and the estimated service life of the motor to be tested is 190h.

For another example, the increase value of the operation error value in a preset time period is 0.01%, the initial operation time period of the motor to be tested is 0-20h, 1.1% of the operation error value in 0-1 h is taken as an initial value, the maximum value of the preset error range is 3%, the estimated test time is 191h after the motor to be tested continues to test for 190h, and the estimated service life of the motor to be tested is 191h.

Optionally, in taking the operation error value in one preset time period as an initial value, the minimum value of one preset time period is the minimum value in a plurality of preset time periods.

Because the motor to be tested is less influenced by the outside in the early stage of testing, and the performance state of the motor to be tested is better. The operation error value obtained by selecting the preset time period of the initial value as the forefront time is used for improving the estimated accuracy.

According to the method, the running error values in a plurality of preset time periods are processed to obtain the running error value which increases in one preset time period, so that the estimated test time when the running error value is equal to the maximum value of the preset error range is calculated, the estimated service life of the motor to be tested is calculated, whether the motor to be tested is qualified or not is judged, a basis is provided for the actual flight of the unmanned aerial vehicle, and the motor model selection is completed.

Referring to fig. 1 to fig. 5 together, fig. 5 is a flowchart illustrating a method for testing the service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, after the step of determining whether the operation error values of the sub-operation information and the sub-reference information corresponding to the respective items are within the preset error range in S301, the method further includes:

s303, acquiring an expected service life value of the motor.

S304, judging whether the difference value between the expected service life value and the estimated service life is within an estimated error range.

Alternatively, the estimated error range y may be 0 < y.ltoreq.50 h, or 0 < y.ltoreq.100 h, or 0 < y.ltoreq.150 h, or 0 < y.ltoreq.200 h, or 0 < y.ltoreq.300 h, or 0 < y.ltoreq.400 h, or 0 < y.ltoreq.500 h, etc.

And S305, stopping the test when the difference value between the expected service life value and the estimated service life is not within the estimated error range.

For example, the expected service life value is 2000h, the estimated service life is 1300h, the estimated error range y is 0 < y less than or equal to 200h, the difference value between the estimated service life value and the estimated error range y is 700h, and the estimated error range y is not within the estimated error range, the probability that the motor to be tested reaches the expected service life is smaller, so that the motor to be tested is selected to stop testing, the testing cost is reduced, and the testing efficiency is improved.

And S306, continuing the test when the difference value between the expected service life value and the estimated service life is within the estimated error range.

For example, the expected service life value is 2000h, the estimated service life is 1800h, the estimated error range y is 0 < y less than or equal to 300h, the difference value between the estimated service life value and the estimated error range y is 200h, and if the estimated error range is within the estimated error range, the probability that the motor to be tested reaches the expected service life is larger, so that the motor to be tested is selected to continue testing, and the motor model selection is completed.

According to the embodiment, the expected service life value of the motor is compared with the estimated service life of the motor to be tested, so that the probability that the motor to be tested can reach the expected service life value is obtained, the test is stopped or the motor model selection is completed, the test cost is reduced, and the test efficiency is improved.

In one embodiment, the plurality of preset time periods include a pre-preset time period, a mid-preset time period, and a post-preset time period arranged in time sequence, and a minimum value of the pre-preset time period is a minimum value in the plurality of preset time periods.

For example, one preset time period is 1h, the initial running time period of the motor to be tested is 0-20h, and a plurality of preset time periods are respectively 0-1h, 1h-2h, 2h-3h, and the like, and 19h-20h. And the pre-set time period in the early stage is 0-1h, the pre-set time period in the middle stage is 1-2 h, and the pre-set time period in the later stage is 2-3 h.

The step of obtaining the increment value comprises the following steps:

Specifically, the increment value is an absolute value of a difference between the running error value of the early-stage preset time period and the middle-stage preset time period.

For example, an operating error value of 0-1h is 1.1% and an operating error value of 1-2 h is 1.11%, then the operating error value increases by 0.01% over a predetermined period of time.

Because the motor to be tested is less influenced by the outside in the early stage of testing, and the performance state of the motor to be tested is better. The longer the test time, the greater the probability that the motor to be tested is affected by other factors, and the greater the probability of damage. According to the embodiment, the running completion value of the motor to be tested in the early preset time period and the running completion value of the motor to be tested in the middle preset time period are adopted, the increment value is obtained, and the increment value is more accurate and is attached to the change of the motor to be tested.

In one embodiment, the preset time period includes a take-off time period, a hover time period, and a landing time period arranged in a time sequence.

For example, if the preset time period is 1h, the take-off time period is 0-5min, the hover time period is 5-55 min, and the landing time period is 55-60 min.

In S300, the step of respectively determining whether the operation error values of the sub-operation information and the sub-reference information corresponding to each item are within the preset error range includes:

s3001, obtaining a basic error range and a correction value.

Alternatively, the base error range x may be 0< x.ltoreq.1%, or 0< x.ltoreq.2%, or 0< x.ltoreq.3%, or 0< x.ltoreq.4%, or 0< x.ltoreq.5%, or 0< x.ltoreq.6%, or 0< x.ltoreq.7%, etc.

Alternatively, the correction value may be 0.5%, or 1%, or 1.5%, or 2%, or 2.5%, or 3%, etc.

S3002, judging whether the test time point of the sub-operation information is matched with the take-off time period, the hovering time period and the landing time period.

For example, the test time point of the sub-operation information may be 2min, or 6min, or 15min, or 30min, or 45min, or 50min, or 56min, or the like.

S3003, when the test time point of the sub-operation information is matched with the take-off time period, obtaining a take-off error range as the preset error range, wherein the minimum value of the take-off error range is the minimum value of the basic error range, and the maximum value of the take-off error range is the sum of the maximum value of the basic error range and the correction value.

For example, the test time point of the sub-operation information is 2min and is within 0-5min of the take-off time period, and the test time point of the sub-operation information is matched with the take-off time period. The basic error range is 0 < x less than or equal to 2%, the correction value is 2%, and the maximum value of the take-off error range is 4%, so the take-off error range is 0 < x less than or equal to 4%.

Because the wave band of unmanned aerial vehicle in the stage of taking off, motor actual operation is great, this embodiment increases the error range through the correction value to correct the preset error range of taking off time quantum, thereby improve the accuracy of the motor that awaits measuring.

S3004, when the test time point of the sub-operation information is matched with the hover time period, acquiring a hover error range as the preset error range, wherein the minimum value of the hover error range is the minimum value of the basic error range, and the maximum value of the hover error range is the difference between the maximum value of the basic error range and the correction value.

For example, if the test time point of the sub-operation information is 30min and is within the hover time period of 5min-55min, the test time point of the sub-operation information is matched with the hover time period. The basic error range is 0 < x.ltoreq.5%, the correction value is 2%, and the maximum value of the hovering error range is 3%, so the hovering error range is 0 < x.ltoreq.3%.

Because unmanned aerial vehicle is in the stage of hovering, the motor actual operation is comparatively stable, and this embodiment reduces the error scope through the correction value to correct the default error scope of hovering time period, thereby improves the accuracy of the motor that awaits measuring.

S3005, when the test time point of the sub-operation information is matched with the falling time period, acquiring a falling error range as the preset error range, wherein the minimum value of the falling error range is the minimum value of the basic error range, and the maximum value of the falling error range is the sum of the maximum value of the basic error range and the correction value.

For example, the test time point of the sub-operation information is 56min and is within 55-60min of the falling time period, and the test time point of the sub-operation information is matched with the falling time period. The basic error range is 0 < x.ltoreq.4%, the correction value is 1%, and the maximum value of the falling error range is 5%, so the falling error range is 0 < x.ltoreq.5%.

Because unmanned aerial vehicle is in the stage of descending, the wave band of motor actual operation is great, and this embodiment increases error range through the correction value to correct the preset error range of descending time quantum, thereby improve the accuracy of motor that awaits measuring.

Referring to fig. 1 to fig. 6 together, fig. 6 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, the reference information includes a reference rotation speed, a reference load, a reference vibration, a reference deflection angle, and a reference temperature of the motor to be measured, and the actual operation information includes an operation rotation speed, an operation load, an operation vibration, an operation deflection angle, and an operation temperature of the motor to be measured.

The rotation speed, load, vibration, deflection angle and temperature of the motor are all important parameters affecting the service life of the unmanned aerial vehicle motor. By referring to the 5 parameters, the accuracy of simulating the use working condition of the motor to be tested on the unmanned aerial vehicle is improved.

At S300, the step of determining whether the operation error value in the preset time period at each interval is within a preset error range includes:

S307, judging whether the operation error value of the operation rotating speed and the reference rotating speed is in a first preset error range, judging whether the operation error value of the operation load and the reference load is in a second preset error range, judging whether the operation error value of the operation vibration and the reference vibration is in a third preset error range, judging whether the operation error value of the operation deflection angle and the reference deflection angle is in a fourth preset error range, and judging whether the operation error value of the operation temperature and the reference temperature is in a fifth preset error range.

Optionally, the first preset error range is 0-2%, the second preset error range is 0-5%, the third preset error range is 0-3%, the fourth preset error range is 0-1%, and the fifth preset error range is 0-5%.

In other words, the first preset error range e1 is 0 < e 1.ltoreq.2%, the second preset error range e2 is 0 < e 2.ltoreq.5%, the third preset error range e3 is 0 < e 3.ltoreq.3%, the fourth preset error range e4 is 0 < e 4.ltoreq.1%, and the fifth preset error range e5 is 0 < e 5.ltoreq.5%.

The operation error value of the first, operation rotation speed and the reference rotation speed refers to the ratio of the absolute value of the difference value of the operation rotation speed and the reference rotation speed to the reference rotation speed. The second, operational error value of the operational load to the reference load refers to the ratio of the absolute value of the operational load to the reference load difference to the reference load. Third, the operational error value of the operational vibration and the reference vibration refers to the ratio of the absolute value of the operational vibration to the reference vibration difference value to the reference vibration. Fourth, the running error value of the running offset angle and the reference offset angle refers to the ratio of the absolute value of the running offset angle and the reference offset angle difference value to the reference offset angle. Fifth, the operating error value of the operating temperature and the reference temperature refers to the ratio of the absolute value of the operating temperature and the reference temperature difference to the reference temperature.

And S308, when the operation error value of any one of the actual operation information and the reference information is not in the preset error range, judging that the motor to be tested is in the damaged state and stopping testing.

In other words, when the running error value of any one of the rotation speed, load, vibration, deflection angle and temperature of the motor to be tested is not within the preset error range, it is determined that the motor to be tested cannot meet the requirement that the motor to be tested is mounted on the unmanned plane for actual flight.

According to the embodiment, the actual use state of the motor to be tested is comprehensively judged by comparing the running error values of the rotating speed, the load, the vibration, the deflection angle and the temperature of the motor to be tested with the preset error range, and the testing accuracy is improved. If the actual running state of any parameter of the rotating speed, the load, the vibration, the deflection angle and the temperature in the motor to be tested has a larger phase difference with the simulated running state, the motor to be tested is in a damaged state, the requirement that the motor to be tested is arranged on the unmanned plane for actual flight cannot be met, and the test can be stopped, so that the test cost is reduced, and the test efficiency is improved.

In addition, when the running error values of the rotating speed, the load, the vibration, the deflection angle and the temperature of the motor to be tested are all in the preset error range, the motor to be tested is in a normal use state, the actual running state of the motor to be tested and the state of the simulated running have smaller phase difference, the requirement of the actual flight state of the unmanned aerial vehicle can be met, and the test can be continued until the motor to be tested is damaged or the expected service life value is met.

Referring to fig. 1 to fig. 7 together, fig. 7 is a flow chart of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, the number of the preset time periods is a plurality, the preset time periods are arranged in time sequence, and the motor to be tested has different reference information in each preset time period.

Optionally, the time lengths of the plurality of preset time periods are equal or unequal. And the motors to be tested in each preset time period have different reference information, and the reference information is respectively obtained by testing the motors to be tested in each preset time period by the unmanned aerial vehicle. For example, the motor to be measured in 0h-1h has first reference information, and the first reference information is information obtained when the motor to be measured is installed in the unmanned aerial vehicle in a time period of 0h-1 h. The motor to be measured in 1h-2h is provided with second reference information, wherein the second reference information is information obtained when the motor to be measured is arranged in the unmanned aerial vehicle and the flight time of the motor to be measured is 1h-2 h. The motor to be measured in 2-4 h is provided with third reference information, wherein the third reference information is information obtained when the motor to be measured is arranged in the unmanned aerial vehicle and the flight time of the motor to be measured is 2-4 h.

In S100, the step of obtaining the reference information of the motor to be tested in the preset time period includes:

s110, acquiring a preliminary test time period of the motor to be tested.

The test time period of the motor to be tested refers to the current preliminary test time period of the motor to be tested. The preparation test time period comprises a preparation starting time point and a preparation ending time point, wherein the preparation starting time point is the time point when the motor to be tested has completed the test, and the preparation ending time point is the time point obtained by adding the preparation starting time point and the preparation continuing test time period.

For example, the motor to be tested has completed the test for 3 hours, and the preliminary start time point is 3 hours. And (5) continuously testing the motor to be tested for 1h at present, and setting the preparation termination time point to be 4h. The preliminary test period of the motor to be tested is 3-4 h.

S120, judging whether the preliminary test time period is matched with any one of a plurality of preset time periods.

Optionally, when the time start point of the preliminary test period is equal to the time start point of a preset period and the time end point of the preliminary test period is equal to the time end point of the preset period, the preliminary test period is matched with the preset period.

For example, when the preliminary test period is 4h to 5h and the preset period is 4h to 5h, the preliminary test period is matched with the preset period.

Optionally, when the time start point of the preliminary test period is greater than the time start point of a preset period and the time end point of the preliminary test period is less than the time end point of the preset period, the preliminary test period is matched with the preset period.

For example, when the preliminary test period is 3h to 6h and the preset period is 4h to 5h, the preliminary test period is matched with the preset period.

And S130, when the preliminary test time period is matched with any preset time period, acquiring the reference information of the preset time period matched with the preliminary test time period as target reference information.

For example, when the preliminary test period is 4h-5h and the preset period is 4h-5h, the reference information in the preset period of 4h-5h is acquired as the target reference information.

S140, acquiring target operation information of the motor to be tested, wherein the target reference information is used as simulation operation information.

S150, judging whether a target operation error value is in the preset error range, wherein the target operation error value is the ratio of the absolute value of the target operation information and the target reference information difference value to the target reference information.

Optionally, when the target operation error values are not within the preset error range, judging that the motor to be tested is in the damaged state and stopping testing.

According to the testing method provided by the embodiment, the preliminary testing time period of the motor to be tested can be obtained first. And then, matching the preliminary test time period with a preset time period, and providing a basis for acquiring the reference information matched with the preliminary test time period. And then, acquiring target operation information taking the matched target reference information as simulation operation information, and providing a basis for subsequently comparing the target operation information with the target reference information and judging the use state of the motor to be tested.

Therefore, the test method provided in this embodiment may first match the preliminary test period with the corresponding preset period, and then obtain the corresponding reference information as the target reference information, so as to improve the accuracy of the test. And comparing the target operation information with the target reference information to obtain a target operation error value in time, and judging the actual use state of the motor to be tested so as to select to stop the test or finish the motor model selection, thereby reducing the test cost and improving the test efficiency.

Referring to fig. 1 to 8 together, fig. 8 is a flowchart eight of a method for testing service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, the number of scenes for acquiring the reference information is multiple, and the motor to be tested has different reference information under each scene.

Different scenes have different scene environment parameters. The scene environment parameters include scene temperature, scene humidity, scene barometric pressure, scene wind speed, scene wind direction, etc. Due to the fact that scene environment parameters in different scenes are different, reference information of a motor to be tested of the unmanned aerial vehicle in the actual flight process is different.

s101, acquiring the test environment parameters of the motor to be tested.

Optionally, the test environmental parameters include test temperature, test humidity, test air pressure, test wind speed, test wind direction, and the like.

S102, judging whether the test environment parameters are matched with any scene environment parameters in a plurality of scenes.

Optionally, the test environment parameter is equal to the scene environment parameter. For example, the scene temperature is equal to the test temperature, the scene humidity is equal to the test humidity, the scene air pressure is equal to the test air pressure, the scene wind speed is equal to the test wind speed, and the scene wind direction is the same as the test wind direction.

Optionally, the test environment parameter is matched with the scene environment parameter when the ratio of the absolute value of the test environment parameter to the scene environment parameter is within the environmental error range. For example, the environmental error range is 0-6%, the scene temperature is 15 ℃, the test temperature is 15.3 ℃, the absolute value of the test environmental parameter and the scene environmental parameter is 2% of the ratio of the scene environmental parameter, and the scene temperature is matched with the test temperature.

Further alternatively, the environmental error can range from 0-2%, or 0-3%, or 0-4%, or 0-5%, or 0-6%, or 0-7%, or 0-8%, etc.

And S103, when the test environment parameter is matched with any scene environment parameter, acquiring the reference information of the scene environment matched with the test environment parameter as target reference information.

For example, when the test temperature is 15 ℃, the test humidity is 60%, and the test air pressure is 0.98 standard atmosphere, the scene environment parameters include the scene temperature is 15 ℃, the scene humidity is 60%, and the scene air pressure is 0.98 standard atmosphere, and the reference information of the scene is obtained as the target reference information.

S104, acquiring target operation information of the motor to be tested, wherein the target reference information is used as simulation operation information.

S105, judging whether a target operation error value is within the preset error range, wherein the target operation error value is the ratio of the absolute value of the difference value of the target operation information and the target reference information to the target reference information.

According to the testing method provided by the embodiment, the testing environment parameters of the motor to be tested can be obtained first. Then, the test environment parameters are matched with the scene environment parameters, and a basis is provided for obtaining the reference information matched with the test environment parameters. And then, acquiring target operation information taking the matched target reference information as simulation operation information, and providing a basis for subsequently comparing the target operation information with the target reference information and judging the use state of the motor to be tested.

Therefore, the testing method provided by the embodiment can match the testing environment parameters with the scene environment parameters, and then obtain the corresponding reference information as the target reference information, so as to improve the testing accuracy. And comparing the target operation information with the target reference information to obtain a target operation error value in time, and judging the actual use state of the motor to be tested so as to select to stop the test or finish the motor model selection, thereby reducing the test cost and improving the test efficiency.

Referring to fig. 1 to fig. 9 together, fig. 9 is a flowchart illustrating a method for testing a service life of an unmanned aerial vehicle according to an embodiment of the application. In one embodiment, the reference information includes a plurality of sub-reference information obtained at different test time points within the preset time period; in S200, the step of obtaining actual operation information of the motor to be tested using the reference information as simulation operation information includes:

s210, acquiring a reference operation curve of the motor to be tested in the preset time period, wherein the reference operation curve is obtained according to the sub-reference information.

The reference operating curve is obtained from a graph composed of a plurality of sub-reference information. For example, the preset time period is 1h, the test time points are respectively 10min, 20min, 30min, 40min, 50min and 60min, and the sub-reference information is information obtained at the 6 test time points.

For example, the reference rotation speed is acquired through the feedback rotation speed of the electronic speed regulator, and the rotation speed change value within one hour is acquired to form a change curve in single flight.

For another example, the reference load is a tension change curve, namely a load curve, in a single flight time period, obtained by controlling given accelerator signals and rotating speeds through unmanned aerial vehicle flight and corresponding to test data of the motor with blades on a rack.

For another example, the reference vibration is collected by a vibration sensor, and the X and Z axis accelerations are collected to form an acceleration change curve in a single flight.

For another example, the reference deflection angle is a deflection angle change curve of single flight formed by acquiring the flight deflection angle in flight according to a level meter.

For another example, the reference temperature is a temperature change curve obtained by transmitting data back to the temperature measuring instrument through a temperature sensor built in the motor.

S220, acquiring the actual operation information of the motor to be tested, wherein the actual operation information is the simulation operation information of the motor to be tested by taking the reference operation curve.

According to the embodiment, the sub-reference information of the specific test time point is collected, the reference operation curve is obtained according to the sub-reference information, and the operation condition of the motor to be tested in the preset time period is simulated to be used as the simulation operation information, so that the test accuracy is improved, the test cost is reduced, and the test efficiency is improved.

The application also provides a processing device which comprises an acquisition unit, a judging unit and a control unit. The acquisition unit is used for acquiring reference information of the motor to be tested in a preset time period, wherein the reference information is obtained by testing the motor to be tested in the unmanned plane; the device is also used for acquiring actual operation information of the motor to be tested, which takes the reference information as simulation operation information, in each preset time period, wherein the actual operation information is obtained by simulating that the motor to be tested is arranged in a testing device; the reference information comprises a plurality of sub-reference information obtained at different testing time points in the preset time period, the actual operation information comprises a plurality of sub-operation information obtained at different testing time points in the preset time period, the plurality of sub-reference information corresponds to the testing time points of the plurality of sub-operation information respectively, and the number of the sub-reference information is equal to the number of the sub-operation information; the qualification ratio is the quantity ratio of the information qualification number to the sub-reference information, and the information qualification number is the item number ratio of the operation error value of the sub-operation information and the sub-reference information in the preset error range; and the device is also used for acquiring the test time period of the motor to be tested so as to obtain the service life of the motor to be tested.

The judging unit is used for judging whether the operation error value in the preset time period at each interval is in a preset error range or not, wherein the operation error value is the ratio of the absolute value of the difference value of the actual operation information and the reference information to the reference information; judging whether the operation error values of the sub-operation information and the sub-reference information corresponding to each item are within the preset error range or not respectively; the method is also used for judging whether the qualification ratio is in a preset qualification range or not; when the qualification ratio is not in the preset qualification range, the judging unit is further used for judging that the motor to be tested is in a damaged state. And the control unit is used for controlling the testing device to stop testing when the motor to be tested is in the damaged state.

According to the processing device provided by the embodiment, through the mutual coordination among the acquisition unit, the judgment unit and the control unit, the actual operation information acquired in each preset time period is compared with the reference information, the latest operation error value is timely obtained, and the actual use state of the motor to be tested is judged by matching with the qualification ratio, so that the test is stopped or the motor model selection is completed, the test cost is reduced, and the test efficiency is improved.

The application also provides test equipment, which comprises a test device and a processing device electrically connected with the test device, wherein the test device is used for testing the motor to be tested, and the test device is used for executing the test method of the service life of the unmanned aerial vehicle motor.

According to the test equipment provided by the embodiment of the application, by executing the test method for the service life of the unmanned aerial vehicle motor, the actual operation information obtained in each preset time period is compared with the reference information, the operation error value is obtained in time, and the actual use state of the motor to be tested is judged by matching with the qualification ratio, so that the test is stopped or the motor model selection is completed, the test cost is reduced, and the test efficiency is improved.

In one embodiment, the method for testing the service life of the unmanned aerial vehicle comprises the following specific steps:

First: acquiring reference information: data are collected in the actual flight of the unmanned aerial vehicle for one hour by the motor. Specifically, the reference rotation speed is acquired through the feedback rotation speed of the electronic speed regulator, and the rotation speed change value within one hour is acquired to form a change curve in single flight. The reference load is a tension change curve, namely a load curve, in a single flight time period is obtained by controlling given accelerator signals and rotating speeds through unmanned aerial vehicle flight and corresponding to test data of the motor with blades on a rack. The reference vibration is acquired by a vibration sensor, and the acceleration of the X axis and the Z axis is acquired to form an acceleration change curve in single flight. The reference deflection angle is a deflection angle change curve of single flight, which is obtained according to a level meter. The reference temperature is a temperature change curve obtained in a single flight by transmitting data back to the temperature measuring instrument through a temperature sensor built in the motor.

Through data acquisition in single flight, the five major data curve contents form the simulation working condition of single flight. And data support is carried out for the subsequent simulation experiment.

Second,: data simulation, actual operation information acquisition, comparison and judgment: through the construction of the test bench, five major data curves are led into corresponding controllers, a single simulation working condition is used as a cycle, 2000 times of cycle can reach 2000 flight frames, namely 2000 hours of service life, and the following are data input of the test bench:

The motor speed is that the measured speed change curve is input into the upper computer of the electronic speed regulator, the upper computer gives instructions to control the electronic speed regulator to enable the motor to run according to the simulated curve, the rack photoelectric encoder reads and monitors in real time, and when the reference speed error exceeds 2%, the system is abnormal, and the system records the abnormality.

The load is applied by matching the motor with the same type of propeller, for example, if the single flight working condition is 3kg-3.1kg-3.8kg-5kg-3kg, and the upper computer gives a corresponding throttle signal of the electronic speed regulator, so that the load simulates the same change. The tension value is read and monitored in real time through the rack tension sensor, and compared with the reference load value, the deviation exceeds 5%, so that the system can record the abnormality.

The vibration value is simulated by adding dynamic balance mud to the motor, the X/Z axis acceleration value in single flight is compared by testing vibration acceleration through the rack, the rack can perform data measurement on the vibration value before each measurement, and the reference vibration value is reached by adding the dynamic balance mud to the motor. And if the comparison reference vibration value exceeds 3%, an abnormality occurs, and the system records the abnormality.

The deflection angle value is a deflection angle controlled by a steering engine of the rack, a single-time flight deflection angle curve measured before an experiment is input into a steering engine controller, so that the deflection angle controlled by the steering engine is calibrated and detected by a level meter, and the error of the reference deflection angle is out of tolerance by 1 percent, namely, the error is abnormal.

The temperature is set by two parts, one part is that the motor generates heat when in load rotation, the temperature is calibrated by a temperature sensor, and the other part is that the given test room is at constant temperature. The data measured in a single flight is used as a cycle, the temperature curve is compared with the ambient temperature before the test, the temperature of the motor during operation is matched with the reference temperature data, and the indoor temperature is set. The temperature sensor detects and monitors the temperature, the temperature is abnormal when the temperature exceeds 5% of the reference temperature, and the system records the abnormality.

And combining the comparison of the operation errors of each item of sub-operation information and the sub-reference information with a preset error range to obtain a qualification ratio, and comparing the qualification ratio with the preset qualification range to obtain whether to continue testing or stop testing.

As shown in table 1, table 1 is a data table of reference information within a preset time. The following is shown:

table 1 data table of reference information in preset time

From the data in table 1, reference operation graphs of reference rotation speed, reference load, reference vibration, reference deflection angle, and reference temperature can be generated, as shown in fig. 10-14, and fig. 10 is a reference operation graph of reference rotation speed according to an embodiment of the present application. Fig. 11 is a reference operating diagram of a reference load according to an embodiment of the present application. Fig. 12 is a graph of a reference operation of reference vibration provided in an embodiment of the present application. FIG. 13 is a graph of reference operation of reference bias angles provided by an embodiment of the present application. Figure 14 is a graph of a reference operating curve for a reference temperature provided by an embodiment of the present application,

Specifically, the preset time is 1h, and the test time points are respectively 10min, 20min, 30min, 40min, 50min and 60min as parameter information. The test environment parameters included a test temperature of 15 ℃, a test humidity of 60% and a test air pressure of 0.98 standard atmospheric pressure.

As shown in table 2, table 2 is the actual running information of the motor to be tested in the test period of 0h-1h,

TABLE 2 actual running information of the Motor to be tested in the test period of 0h-1h

As shown in table 3, table 3 is actual operation information of the motor to be tested in a test period of 1h-2h,

TABLE 3 actual running information of the Motor to be tested in the test period of 1h-2h

As shown in table 4, table 4 is actual operation information of the motor to be tested in the test period of 120h-121h,

TABLE 4 actual running information of the Motor under test for 120h-121h in the test period

The actual operation information of tables 2 to 4 can be obtained by using the reference operation curve obtained in table 1 as the simulation operation information. Comparing the data in tables 1 and 2, it is found that the operation error values of the rotation speed, the load, the vibration, the deflection angle and the temperature in table 2 are all within the preset error range, so that the test is continued.

Then, the reference operation curve obtained from table 1 is again used as simulation operation information, and the motor to be tested is simulated to obtain the data of table 3. Comparing the data in tables 1 and 3, it is found that the operation error values of the rotation speed, the load, the vibration, the deflection angle and the temperature in table 3 are all within the preset error range, so that the test is continued, and the above steps are repeated.

Until the data in table 1 and table 4 are compared, it is found that the running error values of 3 test time points in the rotation speed in table 4 are not in the preset error range, and the reference rotation speed error is more than 2%. The number of qualified information is 2, the qualification rate is 40%, and the preset qualification range is 60% -100%. Therefore, the qualification ratio of the rotating speed is not in the preset qualification range, and the motor to be tested is judged to be in a damaged state and the test is stopped. And the service life of the motor to be tested is 121h.

In summary, the application provides a method for testing the service life of an unmanned aerial vehicle motor, which has the main effects that the multi-section actual operation working condition of the motor to be tested is analyzed into fixed values such as a reference rotating speed, a reference load, a reference vibration, a reference deflection angle, a reference temperature and the like, the fixed values are input into a test system, the actual working condition of the motor is simulated by the test system, and a reference operation curve capable of accelerating aging is obtained through data comparison. And when the motor to be tested is mounted on the test workbench, testing is carried out according to the reference operation curve, the reference information and the actual operation information are compared, and the actual use state of the motor to be tested is judged so as to select to stop the test or finish the motor model selection, thereby reducing the test cost and improving the test efficiency. The test method can reduce the duration of the endurance test for 2000 hours by multiple times with half effort, and greatly improves the test efficiency.

The foregoing has outlined rather broadly the more detailed description of embodiments of the application in order that the principles and embodiments of the application may be better understood, and in order that the present application may be better understood; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A method for testing the service life of an unmanned aerial vehicle motor, comprising the steps of:

2. The test method of claim 1, wherein the actual operation information includes initial operation information; the step of judging whether the operation error value in the preset time period at each interval is in a preset error range or not includes:

3. The test method according to claim 2, further comprising, after the step of acquiring the post-operation information of the motor to be tested with the reference information as the simulation operation information again:

4. The test method of claim 2, wherein the initial operating error value comprises a plurality of operating error values within the predetermined time period, and the operating error values within the predetermined time period are all within a predetermined error range; before the step of acquiring the later-stage operation information of the motor to be tested by taking the reference information as the simulation operation information again, the method further comprises the following steps:

5. The method of testing as defined in claim 4, further comprising, after said step of obtaining an estimated useful life of said motor under test:

Acquiring an expected service life value of a motor;

6. The test method of claim 4, wherein the plurality of preset time periods includes a pre-preset time period, a mid-preset time period, and a post-preset time period arranged in time sequence, a minimum value of the pre-preset time period being a minimum value of the plurality of preset time periods; the step of obtaining the increment value comprises the following steps:

7. The test method of claim 1, wherein the preset time period comprises a take-off time period, a hover time period, and a landing time period arranged in a time sequence; the step of judging whether the operation error values of the sub-operation information and the sub-reference information corresponding to each item are within the preset error range respectively includes:

acquiring a basic error range and a correction value;

8. The test method of claim 1, wherein the reference information includes a reference rotational speed, a reference load, a reference vibration, a reference slip angle, and a reference temperature of the motor to be tested, and the actual operation information includes an operation rotational speed, an operation load, an operation vibration, an operation slip angle, and an operation temperature of the motor to be tested;

9. The test method according to claim 1, wherein the number of the preset time periods is plural, the plural preset time periods are arranged in time order, and the motor to be tested has different reference information in each of the preset time periods; the step of obtaining the reference information of the motor to be tested in the preset time period comprises the following steps:

acquiring a preliminary test time period of the motor to be tested;

10. The test method according to claim 1, wherein the number of scenes in which the reference information is acquired is plural, and the motor to be tested has different reference information in each of the scenes; the step of obtaining the reference information of the motor to be tested in the preset time period comprises the following steps:

Acquiring a test environment parameter of the motor to be tested;

11. The test method according to claim 1, wherein the step of acquiring actual operation information of the motor to be tested using the reference information as simulation operation information comprises:

12. A processing apparatus, the processing apparatus comprising:

13. A test apparatus, characterized in that the test apparatus comprises a test device for testing a motor to be tested, and a processing device electrically connected to the test device, the test device being adapted to perform the method for testing the service life of an unmanned aerial vehicle motor according to any one of claims 1-11.