CN113624434A - Test method and device for hybrid electric drive assembly - Google Patents
Test method and device for hybrid electric drive assembly Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
Abstract
The invention relates to the technical field of vehicle engineering, in particular to a method and a device for testing a hybrid electric drive assembly, wherein the method comprises the following steps: in the process of carrying out an accelerated vibration endurance test on a hybrid electric drive assembly, acquiring vibration data of each vibration sensor in N vibration sensors on the electric drive assembly and displacement of the vibration sensor at a ratchet wheel, wherein the N vibration sensors comprise the vibration sensor at the ratchet wheel and at least one of the vibration sensor at a motor, the vibration sensor at a motor controller and the vibration sensor at a driving motor, and N is an integer greater than 1; judging the vibration data and displacement of each vibration sensor; and if the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than the displacement threshold value, determining that the electric drive assembly meets the set performance. The method improves the testing efficiency of the hybrid electric drive assembly, shortens the research and development period and greatly reduces the research and development cost.
Description
Technical Field
The invention relates to the technical field of vehicle engineering, in particular to a method and a device for testing a hybrid electric drive assembly.
Background
At present, the hybrid electric drive assembly is tested in a high-speed parking performance test, a motor controller vibration test, a motor vibration test and the like. However, the existing testing methods are all realized by performing a single test on the hybrid electric drive assembly. In actual development and verification work, a single testing method is adopted for the hybrid power electric drive assembly, so that the difficulty in overall research and development and testing of the hybrid power electric drive assembly is increased, and the problem of low testing efficiency is caused.
Disclosure of Invention
The embodiment of the application provides a testing method and a testing device for a hybrid electric drive assembly, solves the technical problem that the testing efficiency of the hybrid electric drive assembly is low in the prior art, improves the testing efficiency of the hybrid electric drive assembly, shortens the research and development period, and greatly reduces the research and development cost.
In a first aspect, an embodiment of the present invention provides a method for testing a hybrid electric drive assembly, including:
in the process of carrying out an accelerated vibration endurance test on a hybrid electric drive assembly, obtaining vibration data of each vibration sensor in N vibration sensors on the electric drive assembly and displacement of the vibration sensor at a ratchet wheel, wherein the N vibration sensors comprise the vibration sensor at the ratchet wheel and at least one of the vibration sensor at a motor, the vibration sensor at a motor controller and the vibration sensor at a driving motor, and N is an integer greater than 1;
judging the vibration data and the displacement of each vibration sensor;
and if the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than a displacement threshold value, determining that the electric drive assembly meets the set performance.
Preferably, the accelerated vibration endurance test for a hybrid electric drive assembly includes:
controlling the electric drive assembly to perform a set number of cyclic vibrations in the process of exciting the electric drive assembly through the test bench, wherein the electric drive assembly is erected on the test bench;
and during each cycle of vibration, controlling the vibration frequency of the electric drive to increase from a first set frequency to a second set frequency and then decrease from the second set frequency to the first set frequency, wherein the second set frequency is greater than the first set frequency.
Preferably, the judging the vibration data of each vibration sensor includes:
obtaining a vibration relative value of each vibration sensor according to the vibration data of each vibration sensor and the vibration data of the vibration sensor at the bracket; the vibration sensor at the bracket is arranged at a tool bracket on the test bench;
and judging the vibration relative value of each vibration sensor.
Preferably, the determining the relative value of the vibration of each vibration sensor includes:
if the relative vibration value of each vibration sensor is smaller than the resonance threshold value, determining that the vibration data of each vibration sensor does not meet the resonance condition;
and if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than the resonance threshold value, determining that the part of the driving assembly corresponding to the vibration sensor has a fault, and stopping the accelerated vibration endurance test.
Preferably, the determining the relative value of the vibration of each vibration sensor includes:
and if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than an alarm threshold value and the vibration relative value of the vibration sensor is smaller than the resonance threshold value, determining that a resonance risk exists in a part of the drive assembly corresponding to the vibration sensor, and sending alarm prompt information, wherein the alarm threshold value is smaller than the resonance threshold value.
Preferably, the judging the displacement includes:
obtaining the displacement according to vibration data of a vibration sensor at the ratchet wheel;
and judging the displacement.
Preferably, the judging the displacement includes:
if the displacement is smaller than the displacement threshold value, determining that the driving assembly does not have a fault of mistakenly engaging the gear;
and if the displacement is not less than the displacement threshold value, determining that the drive assembly has a fault of mistakenly engaging the gear.
Based on the same inventive concept, in a second aspect, the present invention further provides a testing apparatus for a hybrid electric drive assembly, comprising:
the device comprises an acquisition module, a drive module and a control module, wherein the acquisition module is used for acquiring vibration data of each vibration sensor in N vibration sensors on a hybrid electric drive assembly and displacement of the vibration sensor at a ratchet wheel in the process of carrying out an accelerated vibration endurance test on the hybrid electric drive assembly, the N vibration sensors comprise the vibration sensor at the ratchet wheel and at least one of the vibration sensor at the motor, the vibration sensor at a motor controller and the vibration sensor at a drive motor, and N is an integer greater than 1;
the judging module is used for judging the vibration data and the displacement of each vibration sensor;
and the determining module is used for determining that the electric drive assembly meets the set performance if the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than a displacement threshold value.
Based on the same inventive concept, in a third aspect, the invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for testing a hybrid electric drive assembly when executing the program.
Based on the same inventive concept, in a fourth aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of a method of testing a hybrid electric drive assembly.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
in the embodiment of the application, vibration data of each vibration sensor and displacement of the vibration sensor at the ratchet wheel are obtained by performing an accelerated vibration endurance test on the hybrid electric drive assembly. And judging the electric drive assembly according to the data, and simultaneously judging whether the vibration data of each vibration sensor meets a resonance condition and whether the displacement of the vibration sensor at the ratchet wheel is smaller than a displacement threshold value. And when the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than the displacement threshold value, determining that the electric drive assembly meets the set performance. Through the accelerated vibration endurance test, the vibration data of each vibration sensor can be tested to not meet the resonance condition, the part corresponding to each vibration sensor is indicated to have no resonance phenomenon, and the displacement is smaller than the displacement threshold value, the phenomenon that the electric drive assembly has no mistaken gear engagement is indicated, the test efficiency is improved, the accuracy of the test result is improved, the test period is shortened, and the test cost is saved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart illustrating steps of a method of testing a hybrid electric drive assembly in an embodiment of the present invention;
FIG. 2 illustrates a schematic structural diagram of a hybrid electric drive assembly in an embodiment of the present invention;
FIG. 3 illustrates another schematic configuration of a hybrid electric drive assembly in an embodiment of the present invention;
FIG. 4 illustrates a block schematic diagram of a hybrid electric drive assembly testing apparatus in an embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a computer device in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
A first embodiment of the present invention provides a method of testing a hybrid electric drive assembly, as shown in fig. 1, during an accelerated vibration durability test of the hybrid electric drive assembly. However, hybrid electric drive assemblies are tested for accelerated vibration durability on a test stand. Therefore, to clearly understand the accelerated vibration durability test, the relationship between the hybrid electric drive assembly and the test rig needs to be explained first.
As shown in fig. 2, the hybrid electric drive assembly includes: the parking device comprises a driving motor 201, a generator 202, a motor controller 203, a parking motor 204, a parking ratchet wheel 205, a shaft tooth group 206, a gearbox control unit 207, a first shell 208 with a cavity, a second shell 209 and a rear end cover 210. The first housing 208 and the rear end cap 210 are connected to form a sealed housing with a cavity. The first housing 208 is also connected to a second housing 209. The gearbox control unit 207 is arranged on the rear end cap 210. In the cavity of the first housing 208, there are provided a control drive motor 201, a generator 202, a parking motor 204, a parking ratchet wheel 205, and a shaft tooth group 206. The driving motor 201 and the generator 202 are arranged side by side, the driving connection is connected with the parking motor 204, and the parking motor 204 is connected with the shaft tooth group 206 through the parking ratchet wheel 205. A motor controller 203 is disposed above the first housing 208, and the motor controller 203 is further connected to the driving motor 201 and the generator 202, respectively.
As shown in fig. 3, the hybrid electric drive assembly is mounted on the test bench, the second housing 209 of the electric drive assembly is connected to the tool holder 211 on the test bench, the rear end cover 210 of the electric drive assembly is connected to the suspension support base 212 on the test bench, and the electric drive assembly is supported by the tool holder 211 and the suspension support base 212 on the test bench, so that the electric drive assembly is mounted on the test bench. A suspension stress relief fixture 213 is also mounted on the suspension support base 212 for relieving stress of the electric drive assembly.
The working principle of the test bench is that when the test bench vibrates, the total electric drive assembly of the hybrid power can be driven to vibrate.
The following describes in detail, with reference to fig. 1, specific implementation steps of the testing method for a hybrid electric drive assembly provided in this embodiment:
prior to performing step S101, an acceleration vibration endurance test performed on a hybrid electric drive assembly needs to be known.
Specifically, vibration sensors are mounted on the hybrid electric drive assembly at parking ratchet 205, at parking motor 204, at motor controller 203 and at the drive motor 201 rotor. The vibration sensor is named after each component on the corresponding electric drive assembly. For example, a vibration sensor mounted at the parking ratchet 205 is named as an at-ratchet vibration sensor, a vibration sensor mounted at the parking motor 204 is named as an at-motor vibration sensor, a vibration sensor mounted at the motor controller 203 is named as an at-motor vibration sensor, and a vibration sensor mounted at the rotor of the driving motor 201 is named as an at-driving-motor vibration sensor. A vibration sensor, named as a mount vibration sensor, is also mounted on the tool mount 211 on the test rig.
And erecting the electric drive assembly on a test bench, and controlling the test bench to excite the electric drive assembly after each vibration sensor is installed.
In the process of exciting the electric drive assembly through the test bench, controlling the electric drive assembly to perform circulating vibration for a set number of times, wherein the electric drive assembly is erected on the test bench; and in the process of each cycle of vibration, the vibration frequency of the electric drive is controlled to increase from a first set frequency to a second set frequency, and then decrease from the second set frequency to the first set frequency, wherein the second set frequency is greater than the first set frequency.
In general, in consideration of practical applications of the driving motor 201 and the engine, the set number of the cyclic vibration is 1000 ten thousand, the first set frequency is 20Hz, the second set frequency is 200Hz, and the set number, the first set frequency and the second set frequency can be set according to actual requirements, but the condition that the second set frequency is greater than the first set frequency needs to be satisfied. It should be noted that the increase, decrease, or irregular increase and decrease of the vibration frequency of the electric driving assembly according to the set step is not limited.
For example, the electric drive assembly is excited by the test bench and controlled to vibrate for 1000 ten thousand cycles. During each cycle of vibration, the vibration frequency of the electric drive assembly is controlled to increase from 20Hz to 200Hz, and decrease from 200Hz to 20 Hz. In other words, the vibration process of the electric drive assembly is referred to as a cyclic vibration of the primary electric drive assembly under the variation that the vibration frequency of the electric drive assembly increases from 20Hz to 200Hz and then decreases from 200Hz to 20 Hz.
The accelerated vibration endurance test principle is as follows: the number of stress cycles experienced by a material becomes the fatigue life, which varies with the magnitude of the load, and engineering generally refers to this magnitude as the endurance limit if the material is subjected to a load cycle below a certain stress magnitude without failing. In order to meet the engineering design, the cycle number N is often 107The corresponding stress value serves as a endurance limit. Therefore, the present embodiment selects 1000 vibration cycles of the assembly X, Y and the Z direction respectively, and examines the number of life cycles of the electric drive assembly.
In this embodiment, the accelerated vibration endurance test of the electric drive assembly is performed according to the actual conditions of the driving motor 201 and the starting electrode in practical application, so that the abnormal phenomenon of the electric drive assembly at high frequency does not occur, and the test has the characteristics of high test efficiency, low cost and short period.
Step S101 is executed, in the process of carrying out an accelerated vibration endurance test on the hybrid electric drive assembly, vibration data of each vibration sensor in N vibration sensors on the electric drive assembly and displacement of the vibration sensor at the ratchet wheel are obtained, wherein the N vibration sensors comprise the vibration sensor at the ratchet wheel and at least one of the vibration sensor at the motor, the vibration sensor at the motor controller and the vibration sensor at the driving motor, and N is an integer greater than 1.
Specifically, during the accelerated vibration endurance test, when the electric drive assembly is subjected to cyclic vibration, vibration data of the corresponding components are collected at each vibration sensor on the electric drive assembly and at the vibration sensor at the bracket. Wherein, N vibration sensor includes at least one in ratchet department vibration sensor, motor controller department vibration sensor and driving motor department vibration sensor. Next, the test method of the hybrid electric drive assembly according to the embodiment is described by using the preferable scheme that the N vibration sensors respectively adopt the vibration sensor at the ratchet wheel, the vibration sensor at the motor controller, and the vibration sensor at the drive motor, and the test method of the scheme adopting different vibration sensors is the same as that of the preferable scheme, and is not described again.
In the accelerated vibration endurance test process, vibration data of a vibration sensor at the ratchet wheel, vibration data of the vibration sensor at the motor controller, vibration data of the vibration sensor at the driving motor and displacement of the vibration sensor at the ratchet wheel are obtained. Wherein, the vibration data refers to the vibration acceleration value of the corresponding component acquired by the vibration sensor, and the unit is m/s2。
In this embodiment, each part on the electric drive assembly is provided with a vibration sensor, each vibration sensor collects vibration data of the corresponding part, required data can be formed efficiently in real time, and each part of the electric drive assembly does not need to be subjected to single performance test, so that the test efficiency is improved, the test period is shortened, and the test cost is saved.
Next, step S102 is performed to determine the vibration data and displacement of each vibration sensor.
Specifically, after obtaining the vibration data collected by each vibration sensor and the displacement of the vibration sensor at the ratchet wheel, it is necessary to simultaneously determine the vibration data of each vibration sensor and the displacement of the vibration sensor at the ratchet wheel.
The process of judging the vibration data of each vibration sensor is as follows:
obtaining a vibration relative value of each vibration sensor according to the vibration data of each vibration sensor and the vibration data of the vibration sensor at the bracket; the vibration sensor at the bracket is arranged at a tool bracket 211 on the test bench; the relative value of the vibration of each vibration sensor is judged.
And if the vibration relative value of each vibration sensor is smaller than the resonance threshold value, determining that the vibration data of each vibration sensor does not meet the resonance condition. And if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than the resonance threshold value, determining that the part of the electric drive assembly corresponding to the vibration sensor has a fault, and stopping the accelerated vibration endurance test. The resonance threshold is usually 6db, and can be set according to actual requirements.
And if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than the alarm threshold value and the vibration relative value of the vibration sensor is smaller than the resonance threshold value, determining that the part of the electric drive assembly corresponding to the vibration sensor has a resonance risk, and sending alarm prompt information. Wherein the alarm threshold is less than the resonance threshold. The alarm threshold is usually 3db, and can also be set according to actual requirements, but the condition that the alarm threshold is smaller than the resonance threshold needs to be met.
Specifically, the vibration sensor at the bracket is arranged on a tool bracket 211 on the test bench, and the bracketThe vibration data collected by the vibration sensor is vibration data of the test bench, which is also called vibration excitation value. Vibration data of vibration sensor at bracket, using aExcitation valueIs expressed in m/s2。
And the vibration data of each vibration sensor and the vibration data of the vibration sensors at the bracket are vibration relative values of each vibration sensor obtained through the formula (1).
Wherein, aMeasured valueFor the vibration data of each vibration sensor, s (db) is the relative value of the vibration of each vibration sensor.
When the vibration relative value of the vibration sensor is not less than the alarm threshold value and the vibration relative value of the vibration sensor is less than the resonance threshold value, namely 6db is greater than S (db) and is greater than or equal to 3db, the prompt message that the part corresponding to the vibration sensor has the resonance risk is sent. And when the relative value of the vibration of each vibration sensor is smaller than the resonance threshold value, namely S (db) < 6db, the fact that the resonance phenomenon does not occur at the part corresponding to each vibration sensor is shown, and the vibration data of each vibration sensor is determined to not meet the resonance condition. And when the vibration relative value of any one vibration sensor in the N vibration sensors is not less than the resonance threshold value, namely S (db) is not less than 6db, indicating that the part corresponding to the vibration sensor has the resonance phenomenon, determining that the part of the driving assembly corresponding to the vibration sensor has a fault, and stopping the accelerated vibration endurance test.
For example, in the accelerated vibration endurance test process, vibration data a of the vibration sensor at the ratchet wheel is acquiredMeasured value 1Vibration data a of vibration sensor at motorMeasured value 2Vibration data a of vibration sensor at motor controllerMeasured value 3And vibration data a of the vibration sensor at the driving motorMeasured value 4Vibration data a of vibration sensor at bracketExcitation value. Judging for each vibration data, and obtaining the vibration relative value S1 of the vibration sensor at the ratchet wheel through the formula (1), namely
Vibration data of the vibration sensor at the motor S2, vibration data of the vibration sensor at the motor controller S3, and vibration data of the vibration sensor at the drive motor S4.
When S1 < 6db, it indicates that there is no resonance phenomenon in the parking ratchet wheel 205 corresponding to S1, and it is determined that the parking ratchet wheel 205 corresponding to S1 does not satisfy the resonance condition, the parking ratchet wheel 205 corresponding to S1 is normal during the acceleration vibration endurance test. When 3db is less than or equal to S1 and less than 6db, the risk of resonance of the parking ratchet wheel 205 is indicated, and an alarm prompt is required. When S1 is more than or equal to 6db, the resonance phenomenon of the parking ratchet wheel 205 is shown, the parking ratchet wheel 205 is determined to meet the resonance condition, and the accelerated vibration endurance test is stopped; further confirming whether the electric drive assembly is damaged or not, determining a resonance source, checking whether the electric drive assembly is installed loosely and causing resonance or the like.
When the S2 is less than 6db, the resonance phenomenon does not exist in the parking motor 204 corresponding to the S2, the parking motor 204 does not meet the resonance condition, and the parking motor 204 corresponding to the S2 is normal in the acceleration vibration endurance test. When the S2 is less than or equal to 3db and less than 6db, the risk of resonance of the parking motor 204 is indicated, and an alarm prompt is required. When the S2 is more than or equal to 6db, the resonance phenomenon of the parking motor 204 is shown, the parking motor 204 is determined to meet the resonance condition, and the accelerated vibration endurance test is stopped; further confirming whether the electric drive assembly is damaged or not, determining a resonance source, checking whether the electric drive assembly is installed loosely and causing resonance or the like.
When S3 < 6db, it indicates that the motor controller 203 corresponding to S3 does not have the resonance phenomenon, and it is determined that the motor controller 203 corresponding to S3 does not satisfy the resonance condition, the motor controller 203 corresponding to S3 is normal during the accelerated vibration endurance test. And when the S3 is less than or equal to 3db and less than 6db, the risk of resonance exists in the motor controller 203, and an alarm prompt is required. When S3 is more than or equal to 6db, the motor controller 203 is indicated to have a resonance phenomenon, the motor controller 203 is determined to meet the resonance condition, and the accelerated vibration endurance test is stopped; further confirming whether the electric drive assembly is damaged or not, determining a resonance source, checking whether the electric drive assembly is installed loosely and causing resonance or the like.
When S4 < 6db, it indicates that there is no resonance phenomenon in the driving motor 201 corresponding to S4, and it is determined that the driving motor 201 does not satisfy the resonance condition, the driving motor 201 corresponding to S4 is normal during the accelerated vibration endurance test. When S4 is less than 6db and less than 3db, the risk of resonance of the driving motor 201 is indicated, and an alarm prompt is required. When S4 is more than or equal to 6db, the resonance phenomenon of the driving motor 201 is shown, the driving motor 201 is determined to meet the resonance condition, and the accelerated vibration endurance test is stopped; further confirming whether the electric drive assembly is damaged or not, determining a resonance source, checking whether the electric drive assembly is installed loosely and causing resonance or the like.
In this embodiment, in the accelerated vibration endurance test process, the vibration condition of each vibration sensor is constantly monitored through the vibration data collected by each vibration sensor, so as to reflect the vibration condition of the electric drive assembly component corresponding to each vibration sensor, and if a resonance phenomenon occurs in a certain component, the accelerated vibration endurance test is stopped, the corresponding component is checked, and the resonance source is confirmed. Therefore, the vibration sensors at all parts replace a single vibration test of the parking ratchet wheel 205, a single vibration test of the parking motor 204, a single vibration test of the motor controller 203 and a single vibration test of the driving motor 201, so that the test efficiency is improved, the test period and the research and development period are greatly shortened, and the test cost and the research and development cost are saved.
The process of judging the displacement of the vibration sensor at the ratchet wheel is as follows:
obtaining the displacement of the vibration sensor at the ratchet wheel according to the vibration data of the vibration sensor at the ratchet wheel; and judging the displacement.
And if the displacement is smaller than the displacement threshold value, determining that the driving assembly does not have a fault of mistakenly engaging the gear. And if the displacement is not less than the displacement threshold value, determining that the drive assembly has a fault of mistakenly engaging the gear. Wherein, the displacement threshold is set according to actual requirements.
Specifically, the displacement of the vibration sensor at the ratchet wheel is obtained through formula (2) according to the vibration data of the vibration sensor at the ratchet wheel. In addition, the displacement of the vibration sensor at the ratchet wheel can be measured by an integral algorithm.
Wherein, aParking deviceRepresenting vibration data of the vibration sensor at the ratchet wheel in m/s2(ii) a d represents the displacement of the vibration sensor at the ratchet wheel, and the unit is mm; f is the real-time vibration frequency of the vibration sensor at the ratchet wheel.
When the displacement is smaller than the displacement threshold value, the parking ratchet wheel 205 runs normally, the electric drive assembly is normal, and the phenomenon of mistaken gear engagement does not occur. When the displacement is not less than the displacement threshold, it indicates that the parking ratchet 205 is not normally operated, the electric drive assembly is not normally operated, and a phenomenon of mistakenly engaging a gear occurs.
In the embodiment, the displacement of the vibration sensor at the ratchet wheel is calculated, so that a possible mistaken gear engaging operation test of the parking system at a high speed is replaced, the test efficiency is improved, the test period is shortened, and the development cost is saved.
After the vibration data of each vibration sensor and the displacement of the vibration sensor at the ratchet wheel are judged, step S103 is executed, and if the vibration data of each vibration sensor does not satisfy the resonance condition and the displacement is smaller than the displacement threshold, it is determined that the electric drive assembly satisfies the set performance.
And if the vibration data of at least one vibration sensor in the N vibration sensors meet the resonance condition or the displacement is not less than the displacement threshold value, determining that the electric drive assembly does not meet the set performance.
Specifically, during the accelerated vibration durability test, the vibration data collected by each vibration sensor is reasonable, and the displacement of the vibration sensor at the ratchet wheel is less than the displacement threshold, so that the tested electric drive assembly is confirmed to have excellent performance. Otherwise, the vibration data acquired by any vibration sensor is unreasonable, the resonance frequency exists, or the displacement of the vibration sensor at the ratchet wheel is not smaller than the displacement threshold value, and the performance of the tested electric drive assembly is determined to be problematic.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
in the present embodiment, vibration data for each vibration sensor and displacement of the vibration sensor at the ratchet are obtained by performing an accelerated vibration durability test on the hybrid electric drive assembly. And judging the electric drive assembly according to the data, and simultaneously judging whether the vibration data of each vibration sensor meets a resonance condition and whether the displacement of the vibration sensor at the ratchet wheel is smaller than a displacement threshold value. And when the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than the displacement threshold value, determining that the electric drive assembly meets the set performance. Through the accelerated vibration endurance test, the vibration data of each vibration sensor can be tested to not meet the resonance condition, the part corresponding to each vibration sensor is indicated to have no resonance phenomenon, and the displacement is smaller than the displacement threshold value, the phenomenon that the electric drive assembly has no mistaken gear engagement is indicated, the test efficiency is improved, the accuracy of the test result is improved, the test period is shortened, and the test cost is saved.
Example two
Based on the same inventive concept, a second embodiment of the present invention further provides a testing apparatus for a hybrid electric drive assembly, as shown in fig. 4, including:
an obtaining module 301, configured to obtain vibration data of each vibration sensor of N vibration sensors on a hybrid electric drive assembly and displacement of the vibration sensor at a ratchet during an accelerated vibration endurance test of the hybrid electric drive assembly, where the N vibration sensors include the vibration sensor at the ratchet and at least one of the vibration sensor at the motor, the vibration sensor at a motor controller, and the vibration sensor at a drive motor, and N is an integer greater than 1;
a judging module 302, configured to judge the vibration data and the displacement of each vibration sensor;
a determining module 303, configured to determine that the electric drive assembly meets a set performance if the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than a displacement threshold.
As an alternative embodiment, the obtaining module 301 is configured to: the accelerated vibration endurance test of a hybrid electric drive assembly comprises:
controlling the electric drive assembly to perform a set number of cyclic vibrations in the process of exciting the electric drive assembly through the test bench, wherein the electric drive assembly is erected on the test bench;
and during each cycle of vibration, controlling the vibration frequency of the electric drive to increase from a first set frequency to a second set frequency and then decrease from the second set frequency to the first set frequency, wherein the second set frequency is greater than the first set frequency.
As an alternative embodiment, the determining module 302 is configured to: the judging the vibration data of each vibration sensor comprises:
obtaining a vibration relative value of each vibration sensor according to the vibration data of each vibration sensor and the vibration data of the vibration sensor at the bracket; the vibration sensor at the bracket is arranged at a tool bracket on the test bench; and judging the vibration relative value of each vibration sensor.
As an alternative embodiment, the determining the relative value of the vibration of each vibration sensor includes:
if the relative vibration value of each vibration sensor is smaller than the resonance threshold value, determining that the vibration data of each vibration sensor does not meet the resonance condition;
and if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than the resonance threshold value, determining that the part of the driving assembly corresponding to the vibration sensor has a fault, and stopping the accelerated vibration endurance test.
As an alternative embodiment, the determining the relative value of the vibration of each vibration sensor includes:
and if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than an alarm threshold value and the vibration relative value of the vibration sensor is smaller than the resonance threshold value, determining that a resonance risk exists in a part of the drive assembly corresponding to the vibration sensor, and sending alarm prompt information, wherein the alarm threshold value is smaller than the resonance threshold value.
As an alternative embodiment, the determining module 302 is configured to: the judging the displacement includes:
obtaining the displacement according to vibration data of a vibration sensor at the ratchet wheel; and judging the displacement.
As an optional embodiment, the determining the displacement includes:
if the displacement is smaller than the displacement threshold value, determining that the driving assembly does not have a fault of mistakenly engaging the gear;
if the displacement is not smaller than the displacement threshold value, determining that the drive assembly has a fault of mistakenly engaging the gear
Since the testing apparatus for a hybrid electric drive assembly described in this embodiment is an apparatus used for implementing the testing method for a hybrid electric drive assembly in the first embodiment of this application, based on the testing method for a hybrid electric drive assembly described in the first embodiment of this application, a person skilled in the art can understand the specific implementation manner of the testing apparatus for a hybrid electric drive assembly of this embodiment and various variations thereof, and therefore, how to implement the method in the first embodiment of this application by the testing apparatus for a hybrid electric drive assembly is not described in detail herein. The device used by those skilled in the art to implement the method for testing the hybrid electric drive assembly in the first embodiment of the present application is within the scope of the present application.
EXAMPLE III
Based on the same inventive concept, the third embodiment of the present invention further provides a computer device, as shown in fig. 5, including a memory 404, a processor 402, and a computer program stored on the memory 404 and executable on the processor 402, wherein the processor 402, when executing the program, implements the steps of any one of the above-mentioned methods for testing a hybrid electric drive assembly.
Where in fig. 5 a bus architecture (represented by bus 400) is shown, bus 400 may include any number of interconnected buses and bridges, with bus 400 linking together various circuits including one or more processors, represented by processor 402, and memory, represented by memory 404. The bus 400 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 406 provides an interface between the bus 400 and the receiver 401 and transmitter 403. The receiver 401 and the transmitter 403 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 402 is responsible for managing the bus 400 and general processing, while the memory 404 may be used for storing data used by the processor 402 in performing operations.
Example four
Based on the same inventive concept, a fourth embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of any one of the methods of testing a hybrid electric drive assembly according to the first embodiment.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method of testing a hybrid electric drive assembly, comprising:
in the process of carrying out an accelerated vibration endurance test on a hybrid electric drive assembly, obtaining vibration data of each vibration sensor in N vibration sensors on the electric drive assembly and displacement of the vibration sensor at a ratchet wheel, wherein the N vibration sensors comprise the vibration sensor at the ratchet wheel and at least one of the vibration sensor at a motor, the vibration sensor at a motor controller and the vibration sensor at a driving motor, and N is an integer greater than 1;
judging the vibration data and the displacement of each vibration sensor;
and if the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than a displacement threshold value, determining that the electric drive assembly meets the set performance.
2. The method of claim 1, wherein said subjecting the hybrid electric drive assembly to an accelerated vibration durability test comprises:
controlling the electric drive assembly to perform a set number of cyclic vibrations in the process of exciting the electric drive assembly through the test bench, wherein the electric drive assembly is erected on the test bench;
and during each cycle of vibration, controlling the vibration frequency of the electric drive to increase from a first set frequency to a second set frequency and then decrease from the second set frequency to the first set frequency, wherein the second set frequency is greater than the first set frequency.
3. The method of claim 2, wherein said determining vibration data for each of said vibration sensors comprises:
obtaining a vibration relative value of each vibration sensor according to the vibration data of each vibration sensor and the vibration data of the vibration sensor at the bracket; the vibration sensor at the bracket is arranged at a tool bracket on the test bench;
and judging the vibration relative value of each vibration sensor.
4. The method of claim 3, wherein said determining a relative value of vibration of each of said vibration sensors comprises:
if the relative vibration value of each vibration sensor is smaller than the resonance threshold value, determining that the vibration data of each vibration sensor does not meet the resonance condition;
and if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than the resonance threshold value, determining that the part of the driving assembly corresponding to the vibration sensor has a fault, and stopping the accelerated vibration endurance test.
5. The method of claim 3, wherein said determining a relative value of vibration of each of said vibration sensors comprises:
and if the vibration relative value of one vibration sensor in the N vibration sensors is not smaller than an alarm threshold value and the vibration relative value of the vibration sensor is smaller than the resonance threshold value, determining that a resonance risk exists in a part of the drive assembly corresponding to the vibration sensor, and sending alarm prompt information, wherein the alarm threshold value is smaller than the resonance threshold value.
6. The method of claim 1, wherein said determining the displacement comprises:
obtaining the displacement according to vibration data of a vibration sensor at the ratchet wheel;
and judging the displacement.
7. The method of claim 1, wherein said determining the displacement comprises:
if the displacement is smaller than the displacement threshold value, determining that the driving assembly does not have a fault of mistakenly engaging the gear;
and if the displacement is not less than the displacement threshold value, determining that the drive assembly has a fault of mistakenly engaging the gear.
8. A test apparatus for a hybrid electric drive assembly, comprising:
the device comprises an acquisition module, a drive module and a control module, wherein the acquisition module is used for acquiring vibration data of each vibration sensor in N vibration sensors on a hybrid electric drive assembly and displacement of the vibration sensor at a ratchet wheel in the process of carrying out an accelerated vibration endurance test on the hybrid electric drive assembly, the N vibration sensors comprise the vibration sensor at the ratchet wheel and at least one of the vibration sensor at the motor, the vibration sensor at a motor controller and the vibration sensor at a drive motor, and N is an integer greater than 1;
the judging module is used for judging the vibration data and the displacement of each vibration sensor;
and the determining module is used for determining that the electric drive assembly meets the set performance if the vibration data of each vibration sensor does not meet the resonance condition and the displacement is smaller than a displacement threshold value.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method steps of any of claims 1-7 when executing the program.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of any one of claims 1 to 7.
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