CN116007930A - Method and system for testing transmission performance of automobile - Google Patents
Method and system for testing transmission performance of automobile Download PDFInfo
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Abstract
The invention discloses a method and a system for testing transmission performance of an automobile, and relates to the technical field of data processing, wherein the method comprises the following steps: based on the running data of the target automobile in the past time, P running condition intervals with the maximum running time and P working condition coefficients are obtained; testing the torque, the rotating speed and the power on wheels of a target automobile to obtain P detection result sets; collecting multiple characteristic information of a target automobile, and calculating and obtaining P torque standard values, P rotation speed standard values and P power standard values; calculating deviation parameters by combining the P detection result sets, and inputting calculation results into a performance evaluation model to obtain P performance evaluation results; and (3) weighting and calculating P performance evaluation results by adopting P working condition coefficients to obtain the transmission performance evaluation result of the target automobile. The invention solves the technical problems of larger deviation and poor reliability of the automobile transmission performance test result in the prior art, and achieves the technical effect of improving the accuracy of the test result.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a method and a system for testing transmission performance of an automobile.
Background
The automobile industry is used as a pillar type industry of the manufacturing industry in China, and the technology is continuously innovated, so that the productivity of the automobile industry is improved. In the running process of the automobile, the performance of the automobile is continuously reduced due to the reasons of running loss, part wear and the like, and the automobile is required to be tested in time, so that the automobile can run safely.
At present, the transmission performance of an automobile is detected mainly by periodically checking the automobile, testing a plurality of projects, and then determining the transmission system performance of the automobile according to the test result. However, as the complexity of road conditions is increased, the conventional detection cannot meet the requirement of ensuring the safety of the automobile, the test result aiming at a single working condition is too one-sided, so that the reliability of the test result is low, the pertinence of maintenance and protection is poor, and the probability of the automobile failure is gradually increased.
In the prior art, the technical problems of larger deviation of automobile transmission performance test results and poor reliability exist.
Disclosure of Invention
The application provides a method and a system for testing automobile transmission performance, which are used for solving the technical problems of larger deviation and poor reliability of automobile transmission performance testing results in the prior art.
In view of the above problems, the present application provides a method and a system for testing the transmission performance of an automobile.
In a first aspect of the present application, there is provided a method for testing transmission performance of an automobile, the method comprising:
according to the running data of the target automobile in the past time, P running condition intervals with the maximum running time and P condition coefficients are obtained, wherein P is an integer greater than 1;
respectively testing the torque, the rotating speed and the power on wheels of the target automobile under the P running condition intervals to obtain P detection result sets;
acquiring multiple pieces of characteristic information of the target automobile to obtain an automobile characteristic set, and calculating and obtaining P torque standard values, P rotating speed standard values and P power standard values according to detection data of the automobile with the automobile characteristic set;
calculating deviation parameters of detection results in the P detection result sets and the P torque standard values, the P rotation speed standard values and the P power standard values to obtain P deviation parameter sets;
inputting the P deviation parameter sets into P performance evaluation units in a performance evaluation model to obtain P performance evaluation results;
and weighting and calculating the P performance evaluation results by adopting the P working condition coefficients to obtain the transmission performance evaluation results of the target automobile.
In a second aspect of the present application, there is provided a system for testing the transmission performance of an automobile, the system comprising:
the working condition coefficient obtaining module is used for obtaining P operation condition intervals with the maximum operation time and P working condition coefficients according to the operation data of the target automobile in the past time, wherein P is an integer greater than 1;
the detection result obtaining module is used for testing the torque, the rotating speed and the power on wheels of the target automobile under the P running condition intervals respectively to obtain P detection result sets;
the standard value calculation module is used for acquiring multiple pieces of characteristic information of the target automobile, obtaining an automobile characteristic set, and calculating and obtaining P torque standard values, P rotating speed standard values and P power standard values according to detection data of the automobile with the automobile characteristic set;
the deviation parameter obtaining module is used for calculating deviation parameters of the detection results in the P detection result sets, the P torque standard values, the P rotation speed standard values and the P power standard values to obtain P deviation parameter sets;
The evaluation result obtaining module is used for inputting the P deviation parameter sets into a P performance evaluation unit in the performance evaluation model to obtain P performance evaluation results;
and the weighting calculation module is used for weighting and calculating the P performance evaluation results by adopting the P working condition coefficients to obtain the transmission performance evaluation results of the target automobile.
One or more technical solutions provided in the present application have at least the following technical effects or advantages:
according to the method, P operation condition intervals and P condition coefficients with the maximum operation time are obtained according to operation data of a target automobile in the past time, P is an integer larger than 1, then on-wheel torque, rotation speed and power of the target automobile are tested under the P operation condition intervals respectively to obtain P detection result sets, then multiple characteristic information of the target automobile is collected to obtain an automobile characteristic set, P torque standard values, P rotation speed standard values and P power standard values are obtained through calculation according to the detection data of the automobile with the automobile characteristic set, then deviation parameters of detection results in the P detection result sets, the P torque standard values, the P rotation speed standard values and the P power standard values are calculated to obtain P deviation parameter sets, P performance evaluation results are obtained by inputting the P deviation parameter sets into P performance evaluation units in a performance evaluation model, and then the P performance evaluation results are weighted and calculated to obtain the transmission performance evaluation results of the target automobile. The technical effect of improving the comprehensiveness and accuracy of transmission performance evaluation is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for testing transmission performance of an automobile according to an embodiment of the present application;
fig. 2 is a schematic flow chart of obtaining P working condition coefficients in a method for testing transmission performance of an automobile according to an embodiment of the present application;
fig. 3 is a schematic flow chart of obtaining a P performance evaluation result in the method for testing the driving performance of an automobile according to the embodiment of the present application;
fig. 4 is a schematic structural diagram of a test system for driving performance of an automobile according to an embodiment of the present application.
Reference numerals illustrate: the device comprises a working condition coefficient obtaining module 11, a detection result obtaining module 12, a standard value calculating module 13, a deviation parameter obtaining module 14, an evaluation result obtaining module 15 and a weighting calculating module 16.
Detailed Description
The application provides a test method for automobile transmission performance, which is used for solving the technical problems of larger deviation and poor reliability of automobile transmission performance test results in the prior art.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
It should be noted that the term "first" and the like in the description and claims of the present application and the above-described drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
As shown in fig. 1, the present application provides a method for testing transmission performance of an automobile, where the method includes:
step S100: according to the running data of the target automobile in the past time, P running condition intervals with the maximum running time and P condition coefficients are obtained, wherein P is an integer greater than 1;
further, as shown in fig. 2, according to the operation data of the target automobile in the past time, P operation condition intervals and P operation condition coefficients with the maximum operation time are obtained, and step S100 in this embodiment of the present application includes:
step S110: dividing the operation working conditions of the target automobile according to the rotation speed of the engine to obtain a plurality of operation working condition intervals;
step S120: acquiring a plurality of running times of a target automobile in the plurality of running condition intervals according to running data of the target automobile in a past preset time range;
step S130: sequencing the plurality of operation time according to the sequence from large to small, selecting P operation condition intervals corresponding to the P operation time before obtaining, and calculating to obtain the operation total time of the P operation condition intervals;
step S140: and calculating the ratio of the P running times to the total running time to obtain the P working condition coefficients.
Specifically, the target automobile is any automobile which needs to be subjected to transmission performance test, and the running data of the target automobile in the running time period before the current time is extracted, so that the running condition of the target automobile in the historical time period can be obtained, and the transmission performance of the target automobile is tested and evaluated by taking the running data as analysis data. In the running process of the target automobile, all parts move, the running performance of the parts can be gradually reduced along with the increase of the running time, and the influence degrees of different running conditions on the automobile parts are different. If the road surface flatness of the driving road is lower, the bump degree of the automobile is higher and the damage degree to parts is higher in the driving process of the automobile, so that the accuracy of a transmission system of the automobile is reduced and the potential safety hazard of failure is increased.
Specifically, the operation data of the target automobile in the past time is extracted according to the driving record data, wherein the operation data comprise data such as an operation time period, a real-time position of the automobile, a driving track, an engine start-stop time, an engine continuous working time, a driving speed of the automobile, an engine rotating speed and the like. And extracting the engine rotating speed in the operation data, and dividing the operation working conditions of the target automobile according to the engine rotating speed, so as to obtain a plurality of operation working condition sections. For example, an operating condition interval of 1000r/min-1500r/min engine speed is set as an operating condition interval, an operating condition interval of 1500r/min-1750r/min engine speed is set as an operating condition interval, and an operating condition interval of 1750r/min-2000r/min engine speed is set as an operating condition interval.
Specifically, after the operation condition intervals are obtained, operation data of a target automobile in a preset time range in a past time period are extracted according to the operation condition intervals, and operation time of each operation condition interval in the past preset time range is counted to obtain the operation times. The plurality of operation times reflect the occurrence of the operation condition interval in the operation process of the target automobile, and the longer the operation time is, the longer the corresponding operation condition interval is used. The longer the operating conditions within the operating condition interval affect the target automotive driveline.
And sequencing the plurality of running times according to the sequence from the large time to the small time according to the plurality of running times, and automatically setting the number of the working condition intervals for analysis, namely the corresponding numerical value of P by a worker according to the actual test requirement. P operation time with longer occurrence time is selected, P operation condition intervals are correspondingly determined, and the selected P operation condition intervals are the working conditions of the target automobile which are frequently used in the driving process. And the running total time is the total duration used in the performance test analysis process of the target automobile determined based on the P running working condition intervals. And calculating the ratio of each operation time in the P operation times to the total operation time, and taking the ratio as a working condition coefficient, thereby obtaining the P working condition coefficients. The influence time length of the target automobile is quantitatively calculated according to different working conditions in the test process, and data support is provided for the influence degree of the operation working conditions on the capability of the transmission system in the operation process of the automobile to be analyzed later, so that the reliability of the test result is improved.
Step S200: respectively testing the torque, the rotating speed and the power on wheels of the target automobile under the P running condition intervals to obtain P detection result sets;
specifically, power from an engine is transmitted to drive wheels through a power train device of an automobile chassis, thereby driving the automobile forward. The power generated by the engine is transmitted through devices such as a clutch, a speed changer, a transmission shaft, a differential mechanism and the like, and transmission loss exists in the power transmission process, so that the detection results obtained after the target automobile is subjected to the on-wheel torque, the rotation speed and the power are corresponding to the on-wheel torque, the on-wheel rotation speed and the on-wheel power, namely, the on-wheel test data is obtained after the on-wheel torque, the rotation speed and the power are transmitted through a transmission system.
Based on the detection means in the prior art, testing of torque, rotation speed and power on wheels is performed in P operation working condition intervals. By way of example, the special force measuring lever is fixed at a prescribed position of the chassis, after the fixing is completed, the horizontal position and static balance of the lever are adjusted, then preheating is carried out according to preset requirements, and after the preheating is completed, torque detection is carried out, so that the torque on the wheel is obtained. Preferably, in the detection process, zero value error verification is performed. By loading brick codes on the force measuring lever, reading indication values according to 10%, 20%, 40%, 60%, 80% and 100% of the upper limit value measured by the torque meter, then gradually reducing the load to zero, repeating the process for 3 times, observing zero drift condition after 30min, and ensuring that the maximum zero drift within 90min does not exceed the requirement of zero value error.
Specifically, when the wheel rotation speed of the target automobile is measured, the automobile drives the roller mechanism, then the driving wheel of the automobile drives the roller, the actual rotation speed of the roller is measured and calculated by a standard rotation speed meter, and the measurement and calculation result is set to be the wheel rotation speed.
Specifically, in the process of detecting the power on the wheels of the target automobile, the force measuring lever is installed in a torque detection installation mode, then the automobile is driven onto the roller mechanism, the roller is driven by the automobile driving wheel, weight loading is carried out on the special bearing platform respectively, and then the power indication value is read.
The method comprises the steps of respectively testing the torque, the rotating speed and the power of a target automobile under P running condition intervals, and obtaining corresponding P detection result sets according to test results, so as to provide analysis data for the follow-up analysis of the transmission performance of the automobile.
Step S300: acquiring multiple pieces of characteristic information of the target automobile to obtain an automobile characteristic set, and calculating and obtaining P torque standard values, P rotating speed standard values and P power standard values according to detection data of the automobile with the automobile characteristic set;
further, collecting multiple feature information of the target automobile, step S300 of the embodiment of the present application further includes:
Step S310: obtaining model information, running age information, driving mileage information and maintenance information of a target automobile;
step S320: and taking the model information, the running year information, the driving mileage information and the overhaul information as an automobile feature set.
Further, according to the detection data of the automobile with the automobile feature set, the torque standard value, the rotation speed standard value and the power standard value are calculated and obtained, and step S300 of the embodiment of the present application further includes:
step S330: obtaining M detection result total sets according to the detection data of the automobile with the automobile feature set, wherein each detection result total set comprises P detection result sets of the same automobile in the P operation condition intervals;
step S340: according to the M detection result total sets, P torque average values, P rotation speed standard value average values and P power standard value average values of M automobiles in the P running working condition intervals are calculated and obtained;
step S350: and taking the P torque average values, the P rotating speed standard value average values and the P power standard value average values as the P torque standard values, the P rotating speed standard values and the P power standard values.
Specifically, the standard value is determined by acquiring the operation data of the same type of automobiles under the same working condition instead of the official operation data serving as the standard value, so that the accuracy of comparison data is improved, and the operation data is more suitable for the actual working condition of the automobiles. The automobile feature set is an information set for describing characteristics of distinguishing automobiles, and comprises model information, operation age information, driving mileage information and maintenance information. The method is characterized in that in order to detect the transmission performance of the automobile, the automobile detection data of the same type and the same operation period are collected, so that the consistency of the basic condition of the automobile can be ensured, furthermore, the consistency of the driving distance of the automobile can be ensured by collecting the automobile detection data of the same driving mileage, namely, the consistency of the loss caused by the driving distance to the transmission system of the automobile is ensured, the consistency of the loss caused by faults of the transmission system of the automobile is ensured by collecting the automobile maintenance data of the same maintenance information, the reliability of the standard value can be ensured by collecting the automobile detection data of the same type based on the automobile feature set and calculating the standard value based on the same.
Preferably, the detection data corresponding to the P operation condition intervals are respectively extracted according to the detection data of the automobile with the automobile feature set, wherein the detection data are the wheel torque, the wheel rotating speed and the wheel power. And respectively carrying out average processing according to the obtained detection data to obtain the P torque standard values, the P rotation speed standard values and the P power standard values. The P torque standard values are accurate corresponding torque values on wheels of the automobile, wherein the P operation condition intervals are determined based on detection data of the automobile with the automobile feature set. The P rotational speed standard values are accurate rotational speed values on wheels of the automobile corresponding to P operation working condition intervals determined based on detection data of the automobile with the automobile feature set. And the P power standard values are accurate automobile wheel power values corresponding to P running condition intervals determined based on the detection data of the automobile with the automobile feature set.
Step S400: calculating deviation parameters of detection results in the P detection result sets and the P torque standard values, the P rotation speed standard values and the P power standard values to obtain P deviation parameter sets;
specifically, according to the one-to-one correspondence between the P detection result sets and the P operation condition intervals and the one-to-one correspondence between the P torque standard values, the P rotation speed standard values, and the deviation parameters of the P power standard values and the P operation condition intervals, difference value calculation between the detection result and the standard value is performed respectively, and the ratio of the difference value to the standard value is further calculated, so that the deviation condition between the detection result and the standard value under different operation conditions, namely the P deviation parameter sets, is obtained. The P deviation parameter sets are used for quantitatively reflecting deviation between a parameter value corresponding to transmission performance of the target automobile under different operation conditions and a standard parameter value.
Step S500: inputting the P deviation parameter sets into P performance evaluation units in a performance evaluation model to obtain P performance evaluation results;
further, as shown in fig. 3, the P deviation parameter sets are input into a P performance evaluation unit in the performance evaluation model, and step S500 in the embodiment of the present application further includes:
step S510: acquiring a first deviation parameter set of a plurality of samples in a first operation condition interval based on detection data with the automobile feature set, wherein the first operation condition interval is any one of the P operation condition intervals;
step S520: based on the first deviation parameter sets of the plurality of samples, carrying out transmission performance calculation and evaluation to obtain first transmission performance evaluation results of the plurality of samples;
step S530: constructing an evaluation coordinate system based on the torque deviation parameter, the rotation speed deviation parameter and the power deviation parameter;
step S540: inputting the first deviation parameter sets of the plurality of samples into the evaluation coordinate system to obtain first coordinate points of the plurality of samples, and marking the first coordinate points of the plurality of samples by adopting the first transmission performance evaluation results of the plurality of samples to obtain a first performance evaluation unit;
Step S550: inputting a first deviation parameter set in the first operation working condition interval into the first performance evaluation unit to obtain a first performance evaluation result;
step S560: and continuously constructing other P-1 performance evaluation units, and inputting the P-1 deviation parameter sets into the P-1 performance evaluation units to obtain P performance evaluation results.
Specifically, the P performance evaluation unit is a unit module for performing transmission performance evaluation on P deviation parameter sets, and is embedded in the performance evaluation model. The performance evaluation model is a functional model for analyzing and evaluating the transmission performance of the target automobile by taking the deviation parameter as analysis data. And the P performance evaluation result is obtained by evaluating the transmission performance of the target automobile in P operation working condition intervals by using an evaluation unit.
Specifically, the construction modes of the P performance evaluation units are consistent, but the construction data are different, so that the P performance evaluation units can evaluate different deviation parameters respectively. Preferably, the first performance evaluation unit is constructed by taking a first deviation parameter set of a plurality of samples as construction data in a first operation condition interval. The first operating condition interval is an operating condition interval arbitrarily selected from P operating condition intervals. The first deviation parameter set of the samples is a data set of deviation conditions between detection data corresponding to the automobile samples with the same engine speed in a first operation working condition interval and a standard value, and the deviation parameter set is extracted from the detection data of the automobile with the automobile characteristic set. And taking the first deviation parameter set of the plurality of samples as a transmission performance evaluation basis, and evaluating and grading the transmission performance of the plurality of samples so as to obtain a first transmission performance evaluation result of the plurality of samples. Wherein the plurality of sample first transmission performance evaluation results include a dynamic performance evaluation result. The dynamic performance evaluation result is evaluated based on data in a first deviation parameter set, specifically, based on the on-wheel torque deviation parameter, the rotating speed deviation parameter and the efficiency deviation parameter, which correspond to the transmission performance of the automobile, wherein the deviation parameter is positive and is larger, and the evaluation grade of the first transmission performance evaluation result is larger.
Specifically, the evaluation coordinate system is a three-dimensional coordinate system constructed by taking a torque deviation parameter, a rotation speed deviation parameter and a power deviation parameter as coordinate axis coordinate values, wherein the three coordinate axes are mutually perpendicular. And inputting the deviation parameter set into the evaluation coordinate system, and determining the position of the sample point corresponding to the deviation parameter set in the coordinate system by taking the torque deviation parameter value, the rotation speed deviation parameter value and the power deviation parameter value in the set as coordinate values. Based on this, the plurality of sample first coordinate points are determined by inputting the plurality of sample first deviation parameter sets into the evaluation coordinate system. And further, marking the first coordinate points of the samples according to the transmission performance evaluation results corresponding to the samples, namely, the first transmission performance evaluation results of the samples, determining the distribution condition of the coordinate points with different transmission performances in the coordinate system, and setting the marked coordinate system as the first performance evaluation unit for evaluating the transmission performance of the target automobile in the first operation working condition interval.
Preferably, the first performance evaluation result is obtained by inputting the first deviation parameter set into the first performance evaluation unit to perform performance evaluation. The first performance evaluation result is obtained after evaluating the performance of the target automobile in the first operation working condition interval. And further, based on the same principle, constructing other P-1 performance evaluation units, inputting P-1 deviation parameter sets into the P-1 performance evaluation unit, and combining the first performance evaluation unit and the P-1 performance evaluation unit to obtain the P performance evaluation unit in the performance evaluation model.
Further, a first deviation parameter set in the first operation condition interval is input to the first performance evaluation unit to obtain a first performance evaluation result, where step S550 in the embodiment of the present application further includes:
step S551: inputting the first deviation parameter set into an evaluation coordinate system in the first performance evaluation unit to obtain a first coordinate point;
step S552: acquiring Q sample first coordinate points which are nearest to the first coordinate point, wherein Q is an odd number greater than or equal to 3;
step S553: and acquiring Q sample first transmission performance evaluation results corresponding to the Q sample first coordinate points, and taking the sample first transmission performance evaluation result with the highest occurrence frequency as the first performance evaluation result.
Specifically, the first coordinate point is a point obtained by positioning the coordinate point in the evaluation coordinate system with the parameter value in the first offset parameter set as the coordinate value. Further, Q sample points closest to the first coordinate point, that is, Q sample points having the smallest distance value are set as the Q sample first coordinate points, and Q is an odd number of 3 or more, based on the distance value between the sample coordinate points and the first coordinate point. And acquiring Q sample first transmission performance evaluation results corresponding to the Q sample first coordinate points, and taking the sample first transmission performance evaluation result with the highest occurrence frequency in the Q sample first transmission performance evaluation results as the first performance evaluation result. The higher the frequency of the evaluation result is, the transmission performance evaluation result of the target automobile corresponding to the first deviation parameter set under the first operation working condition interval is closest to the transmission performance evaluation result, and the transmission performance evaluation result is set as the first performance evaluation result. Therefore, the aim of evaluating the transmission performance of the target automobile through the known performance evaluation condition of the sample is fulfilled, and the technical effect of improving the performance evaluation efficiency is achieved.
Step S600: and weighting and calculating the P performance evaluation results by adopting the P working condition coefficients to obtain the transmission performance evaluation results of the target automobile.
Further, by adopting the P working condition coefficients, weighting and calculating the P performance evaluation results to obtain the transmission performance evaluation result of the target automobile, the step S600 in the embodiment of the present application further includes:
step S610: according to the P working condition coefficients, weight distribution is carried out to obtain P weight values;
step S620: and carrying out weighted summation calculation on the P performance evaluation results by adopting the P weight values to obtain the transmission performance evaluation results.
Specifically, the weight distribution is performed based on the P working condition coefficients, and the larger the working condition coefficient is, the larger the corresponding weight value is. In other words, the weight value is allocated according to the value corresponding to the P working condition coefficients. And then, according to the P weight values, weighting and summing calculation is carried out on the P performance evaluation results, and the calculated result is set as the transmission performance evaluation result, so that the transmission performance of the target automobile is subjected to working condition fusion analysis, and the technical effect of improving the accuracy of performance evaluation is achieved.
In summary, the embodiments of the present application have at least the following technical effects:
according to the method, historical operation data of the target automobile is taken as analysis basis, then a representative operation condition interval is selected to test the target automobile, a corresponding detection result is obtained, meanwhile, the detection data of the automobile with the same automobile feature set is used for determining the standard value of the corresponding data of the detection result, the data deviation condition of the target automobile is analyzed based on the standard value, further, the deviation parameter set obtained through analysis is taken as input data, the P performance evaluation unit in the performance evaluation model is input, the corresponding evaluation result is intelligently obtained, and therefore the transmission performance evaluation result after comprehensive analysis is obtained. The intelligent degree of the transmission performance evaluation is improved, and the technical effect of improving the reliability of the evaluation result is achieved.
Example two
Based on the same inventive concept as the method for testing the transmission performance of an automobile in the foregoing embodiments, as shown in fig. 4, the present application provides a system for testing the transmission performance of an automobile, where the system and the method embodiments in the embodiments of the present application are based on the same inventive concept. Wherein the system comprises:
The working condition coefficient obtaining module 11 is used for obtaining P operation condition intervals and P working condition coefficients with the maximum operation time according to the operation data of the target automobile in the past time, wherein P is an integer greater than 1;
the detection result obtaining module 12 is configured to test on-wheel torque, rotation speed and power of the target automobile under the P operation condition intervals respectively, so as to obtain P detection result sets;
the standard value calculation module 13 is used for collecting multiple pieces of characteristic information of the target automobile, obtaining an automobile characteristic set, and calculating and obtaining P torque standard values, P rotating speed standard values and P power standard values according to detection data of the automobile with the automobile characteristic set;
the deviation parameter obtaining module 14 is configured to calculate deviation parameters of the detection results in the P detection result sets and the P torque standard values, the P rotation speed standard values and the P power standard values, so as to obtain P deviation parameter sets;
the evaluation result obtaining module 15 is configured to input the P deviation parameter sets into a P performance evaluation unit in a performance evaluation model to obtain a P performance evaluation result;
And the weighting calculation module 16 is used for weighting and calculating the P performance evaluation results by adopting the P working condition coefficients to obtain the transmission performance evaluation results of the target automobile.
Further, the system further comprises:
the working condition interval obtaining unit is used for dividing the operation working conditions of the target automobile according to the rotation speed of the engine to obtain a plurality of operation working condition intervals;
the running time acquisition unit is used for acquiring a plurality of running times of the target automobile in the plurality of running condition intervals according to running data of the target automobile in a past preset time range;
the operation total time calculation unit is used for sequencing the plurality of operation time according to the sequence from big to small, selecting and acquiring P operation condition intervals corresponding to the previous P operation time, and calculating and acquiring the operation total time of the P operation condition intervals;
and the ratio calculating unit is used for calculating the ratio of the P running times to the total running time to obtain the P working condition coefficients.
Further, the system further comprises:
The maintenance information acquisition unit is used for acquiring model information, running age information, driving mileage information and maintenance information of the target automobile;
and the characteristic set setting unit is used for taking the model information, the running age information, the driving mileage information and the maintenance information as an automobile characteristic set.
Further, the system further comprises:
the detection result total set obtaining unit is used for obtaining M detection result total sets according to the detection data of the automobile with the automobile characteristic set, and each detection result total set comprises P detection result sets of the same automobile in the P operation condition intervals;
the average value calculation unit is used for calculating and obtaining P torque average values, P rotating speed standard value average values and P power standard value average values of M automobiles in the P running working condition intervals according to the M detection result total sets;
and the standard value setting unit is used for taking the P torque average values, the P rotating speed standard value average values and the P power standard value average values as the P torque standard values, the P rotating speed standard values and the P power standard values.
Further, the system further comprises:
the first deviation parameter obtaining unit is used for obtaining a plurality of sample first deviation parameter sets under a first operation condition interval based on detection data with the automobile feature sets, and the first operation condition interval is any one of the P operation condition intervals;
the sample evaluation result obtaining unit is used for carrying out transmission performance calculation evaluation based on the plurality of sample first deviation parameter sets to obtain a plurality of sample first transmission performance evaluation results;
a coordinate system construction unit for constructing an evaluation coordinate system based on the torque deviation parameter, the rotation speed deviation parameter, and the power deviation parameter;
the sample coordinate point marking unit is used for inputting the first deviation parameter sets of the samples into the evaluation coordinate system to obtain first coordinate points of the samples, and marking the first coordinate points of the samples by adopting the first transmission performance evaluation results of the samples to obtain a first performance evaluation unit;
the first evaluation result obtaining unit is used for inputting a first deviation parameter set in the first operation working condition interval into the first performance evaluation unit to obtain a first performance evaluation result;
And the P evaluation result obtaining units are used for continuously constructing other P-1 performance evaluation units, inputting the P-1 deviation parameter sets into the P-1 performance evaluation units and obtaining P performance evaluation results.
Further, the system further comprises:
a first coordinate point obtaining unit for inputting the first deviation parameter set into an evaluation coordinate system in the first performance evaluation unit to obtain a first coordinate point;
the sample first coordinate point obtaining unit is used for obtaining Q sample first coordinate points which are nearest to the first coordinate point, wherein Q is an odd number greater than or equal to 3;
and the first performance evaluation result setting unit is used for acquiring Q sample first transmission performance evaluation results corresponding to the Q sample first coordinate points, and taking the sample first transmission performance evaluation result with the highest occurrence frequency as the first performance evaluation result.
Further, the system further comprises:
the weight distribution unit is used for carrying out weight distribution according to the P working condition coefficients to obtain P weight values;
And the transmission performance evaluation result obtaining unit is used for carrying out weighted summation calculation on the P performance evaluation results by adopting the P weight values to obtain the transmission performance evaluation result.
It should be noted that the sequence of the embodiments of the present application is merely for description, and does not represent the advantages and disadvantages of the embodiments. And the foregoing description has been directed to specific embodiments of this specification. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
The foregoing description of the preferred embodiments of the present application is not intended to limit the invention to the particular embodiments of the present application, but to limit the scope of the invention to the particular embodiments of the present application.
The specification and drawings are merely exemplary of the application and are to be regarded as covering any and all modifications, variations, combinations, or equivalents that are within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the present application and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (7)
1. A method for testing the transmission performance of an automobile, the method comprising:
according to the running data of the target automobile in the past time, P running condition intervals with the maximum running time and P condition coefficients are obtained, wherein P is an integer greater than 1;
respectively testing the torque, the rotating speed and the power on wheels of the target automobile under the P running condition intervals to obtain P detection result sets;
acquiring multiple pieces of characteristic information of the target automobile to obtain an automobile characteristic set, and calculating and obtaining P torque standard values, P rotating speed standard values and P power standard values according to detection data of the automobile with the automobile characteristic set;
calculating deviation parameters of detection results in the P detection result sets and the P torque standard values, the P rotation speed standard values and the P power standard values to obtain P deviation parameter sets;
Inputting the P deviation parameter sets into P performance evaluation units in a performance evaluation model to obtain P performance evaluation results;
weighting and calculating the P performance evaluation results by adopting the P working condition coefficients to obtain the transmission performance evaluation results of the target automobile;
inputting the P deviation parameter sets into P performance evaluation units in a performance evaluation model, wherein the P performance evaluation units comprise:
acquiring a first deviation parameter set of a plurality of samples in a first operation condition interval based on detection data with the automobile feature set, wherein the first operation condition interval is any one of the P operation condition intervals;
based on the first deviation parameter sets of the plurality of samples, carrying out transmission performance calculation and evaluation to obtain first transmission performance evaluation results of the plurality of samples;
constructing an evaluation coordinate system based on the torque deviation parameter, the rotation speed deviation parameter and the power deviation parameter;
inputting the first deviation parameter sets of the plurality of samples into the evaluation coordinate system to obtain first coordinate points of the plurality of samples, and marking the first coordinate points of the plurality of samples by adopting the first transmission performance evaluation results of the plurality of samples to obtain a first performance evaluation unit;
Inputting a first deviation parameter set in the first operation working condition interval into the first performance evaluation unit to obtain a first performance evaluation result;
and continuously constructing other P-1 performance evaluation units, and inputting the P-1 deviation parameter sets into the P-1 performance evaluation units to obtain P performance evaluation results.
2. The method of claim 1, wherein obtaining P operating condition intervals and P operating condition coefficients with the maximum operating time according to the operating data of the target automobile in the past time comprises:
dividing the operation working conditions of the target automobile according to the rotation speed of the engine to obtain a plurality of operation working condition intervals;
acquiring a plurality of running times of a target automobile in the plurality of running condition intervals according to running data of the target automobile in a past preset time range;
sequencing the plurality of operation time according to the sequence from large to small, selecting P operation condition intervals corresponding to the P operation time before obtaining, and calculating to obtain the operation total time of the P operation condition intervals;
and calculating the ratio of the P running times to the total running time to obtain the P working condition coefficients.
3. The method of claim 1, wherein collecting the plurality of characteristic information of the target automobile comprises:
obtaining model information, running age information, driving mileage information and maintenance information of a target automobile;
and taking the model information, the running year information, the driving mileage information and the overhaul information as an automobile feature set.
4. The method of claim 1, wherein calculating the torque criterion value, the rotational speed criterion value, and the power criterion value based on the detected data of the vehicle having the set of vehicle characteristics comprises:
obtaining M detection result total sets according to the detection data of the automobile with the automobile feature set, wherein each detection result total set comprises P detection result sets of the same automobile in the P operation condition intervals;
according to the M detection result total sets, P torque average values, P rotation speed standard value average values and P power standard value average values of M automobiles in the P running working condition intervals are calculated and obtained;
and taking the P torque average values, the P rotating speed standard value average values and the P power standard value average values as the P torque standard values, the P rotating speed standard values and the P power standard values.
5. The method of claim 1, wherein inputting a first set of deviation parameters for the first operating condition interval into the first performance evaluation unit to obtain a first performance evaluation result comprises:
inputting the first deviation parameter set into an evaluation coordinate system in the first performance evaluation unit to obtain a first coordinate point;
acquiring Q sample first coordinate points which are nearest to the first coordinate point, wherein Q is an odd number greater than or equal to 3;
and acquiring Q sample first transmission performance evaluation results corresponding to the Q sample first coordinate points, and taking the sample first transmission performance evaluation result with the highest occurrence frequency as the first performance evaluation result.
6. The method of claim 1, wherein weighting the P performance evaluation results by using the P operating condition coefficients to obtain a transmission performance evaluation result of the target automobile comprises:
according to the P working condition coefficients, weight distribution is carried out to obtain P weight values;
and carrying out weighted summation calculation on the P performance evaluation results by adopting the P weight values to obtain the transmission performance evaluation results.
7. A system for testing the transmission performance of an automobile, said system comprising:
The working condition coefficient obtaining module is used for obtaining P operation condition intervals with the maximum operation time and P working condition coefficients according to the operation data of the target automobile in the past time, wherein P is an integer greater than 1;
the detection result obtaining module is used for testing the torque, the rotating speed and the power on wheels of the target automobile under the P running condition intervals respectively to obtain P detection result sets;
the standard value calculation module is used for acquiring multiple pieces of characteristic information of the target automobile, obtaining an automobile characteristic set, and calculating and obtaining P torque standard values, P rotating speed standard values and P power standard values according to detection data of the automobile with the automobile characteristic set;
the deviation parameter obtaining module is used for calculating deviation parameters of the detection results in the P detection result sets, the P torque standard values, the P rotation speed standard values and the P power standard values to obtain P deviation parameter sets;
the evaluation result obtaining module is used for inputting the P deviation parameter sets into a P performance evaluation unit in the performance evaluation model to obtain P performance evaluation results;
The weighting calculation module is used for weighting and calculating the P performance evaluation results by adopting the P working condition coefficients to obtain the transmission performance evaluation results of the target automobile;
the first deviation parameter obtaining unit is used for obtaining a plurality of sample first deviation parameter sets under a first operation condition interval based on detection data with the automobile feature sets, and the first operation condition interval is any one of the P operation condition intervals;
the sample evaluation result obtaining unit is used for carrying out transmission performance calculation evaluation based on the plurality of sample first deviation parameter sets to obtain a plurality of sample first transmission performance evaluation results;
a coordinate system construction unit for constructing an evaluation coordinate system based on the torque deviation parameter, the rotation speed deviation parameter, and the power deviation parameter;
the sample coordinate point marking unit is used for inputting the first deviation parameter sets of the samples into the evaluation coordinate system to obtain first coordinate points of the samples, and marking the first coordinate points of the samples by adopting the first transmission performance evaluation results of the samples to obtain a first performance evaluation unit;
The first evaluation result obtaining unit is used for inputting a first deviation parameter set in the first operation working condition interval into the first performance evaluation unit to obtain a first performance evaluation result;
and the P evaluation result obtaining units are used for continuously constructing other P-1 performance evaluation units, inputting the P-1 deviation parameter sets into the P-1 performance evaluation units and obtaining P performance evaluation results.
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