Wheel hub bearing bench test method, device, equipment and storage medium

Abstract

The present application relates to the field of vehicle testing technology, and discloses a bench test method, device, equipment and storage medium for a wheel hub bearing, the method comprising: obtaining a fatigue life value of the wheel hub bearing under a comprehensive endurance test condition of a whole vehicle; determining a target bench load parameter based on the fatigue life value of the wheel hub bearing under the comprehensive endurance test condition of the whole vehicle; and performing a bench test of the wheel hub bearing according to the target bench load parameter. The present application can effectively improve the accuracy of the wheel hub bearing bench load test results.

Description

Technical Field

[0001] The present application relates to the field of vehicle testing technology, and in particular to a bench test method, device, equipment and storage medium for wheel hub bearings. Background Art

[0002] As an important load-bearing component of automobiles, the durability of automobile wheel hub bearings has received much attention from OEMs. Automobile bearings are subjected to complex forces, mainly axial and radial loads. Current technology mainly relies on the experience of previous historical models to formulate wheel hub bearing bench durability test loads, resulting in low accuracy of wheel hub bearing bench load test results.

[0003] Therefore, how to effectively improve the accuracy of wheel hub bearing bench load test results is a problem that needs to be solved urgently.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a wheel hub bearing bench test method, device, equipment and storage medium, aiming to solve the technical problem of how to effectively improve the accuracy of wheel hub bearing bench load test results.

[0006] To achieve the above objectives, the present application proposes a bench test method for a hub bearing, the method comprising:

[0007] Obtain the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle;

[0008] Determining a target bench load parameter based on a fatigue life value of the wheel hub bearing under a comprehensive vehicle durability test condition;

[0009] A bench test of the wheel hub bearing is performed according to the target bench load parameter.

[0010] In one embodiment, obtaining the fatigue life of the hub bearing under the vehicle comprehensive durability test conditions includes:

[0011] Collect the six-component force load signal of the wheel center under the vehicle comprehensive durability test conditions;

[0012] Determining a wheel center vertical force load signal and a wheel center lateral force load signal according to the wheel center six-component force load signal;

[0013] The fatigue life of the wheel hub bearing under the vehicle comprehensive durability test condition is determined based on the wheel center vertical force load signal and the wheel center lateral force load signal.

[0014] In one embodiment, the determining the fatigue life of the wheel hub bearing under the vehicle comprehensive durability test condition based on the wheel center vertical force load signal and the wheel center lateral force load signal includes:

[0015] Obtain the structural parameters of the wheel hub bearing and the bearing fatigue life curve;

[0016] The fatigue life of the wheel hub bearing under the vehicle comprehensive durability test condition is determined based on the wheel center vertical force load signal and the wheel center lateral force load signal, the structural parameters of the wheel hub bearing and the bearing fatigue life curve.

[0017] In one embodiment, the structural parameters of the wheel hub bearing include at least: bearing span, distance from the outer bearing action point to the wheel center, distance from the inner bearing action point to the wheel center, bearing offset and tire rolling radius.

[0018] In one embodiment, determining the target bench load parameter based on the fatigue life of the wheel hub bearing under the vehicle comprehensive durability test conditions includes:

[0019] Conduct a durability test under the wheel hub bearing bench durability test conditions to obtain a reference fatigue life value;

[0020] Comparing the reference fatigue life value with the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test working condition to obtain a comparison result;

[0021] When the comparison result is consistent, obtaining a parameter range of a bench load parameter under a wheel hub bearing bench durability test condition;

[0022] The target bench load parameter is determined according to the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition.

[0023] In one embodiment, determining the target bench load parameter according to the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition includes:

[0024] generating an initial individual population based on a parameter range of a bench load parameter under the wheel hub bearing bench durability test condition;

[0025] Determine the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value;

[0026] Calculating based on the fitness function value of each individual in the initial individual population to obtain a probability distribution model;

[0027] The target bench load parameters are determined based on the probability distribution model.

[0028] In one embodiment, determining the target gantry load parameter based on the probability distribution model includes:

[0029] Generate a reference individual through the probability distribution model;

[0030] A new initial individual population is generated based on the reference individual and the initial individual population, and the step of determining the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value is performed until the iteration termination condition is met to obtain the target bench load parameter.

[0031] In addition, to achieve the above-mentioned purpose, the present application also proposes a bench test device for a wheel hub bearing, the bench test device for the wheel hub bearing comprising:

[0032] An acquisition module is used to obtain the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle;

[0033] A determination module, used to determine a target bench load parameter based on a fatigue life value of the wheel hub bearing under a comprehensive endurance test condition of a whole vehicle;

[0034] The test module is used to perform a bench test of the wheel hub bearing according to the target bench load parameters.

[0035] In addition, to achieve the above-mentioned objectives, the present application also proposes a bench test device for a wheel hub bearing, the device comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the bench test method for a wheel hub bearing as described above.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the bench test method of the wheel hub bearing as described above are implemented.

[0037] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the bench test method for the wheel hub bearing as described above are implemented.

[0038] The present application provides a bench test method for a wheel hub bearing. The present application first obtains the fatigue life value of the wheel hub bearing under the working condition of a comprehensive endurance test of a whole vehicle, thereby facilitating setting the conditions for the bench test based on the actual working condition data of the comprehensive endurance test of the whole vehicle, thereby improving the accuracy and reliability of the bench test; determines the target bench load parameters based on the fatigue life value of the wheel hub bearing under the working condition of the comprehensive endurance test of the whole vehicle, thereby facilitating rapid and accurate determination of the bench load parameters; and performs a bench test on the wheel hub bearing according to the target bench load parameters, thereby effectively improving the accuracy of the bench load test results of the wheel hub bearing.

[0039] In summary, the present application performs bench tests by determining target bench load parameters based on the fatigue life values ​​of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle. The bench tests can be performed quickly and accurately using the target bench load parameters determined by the fatigue life values, thereby overcoming the technical defect of low accuracy of bench load test results for wheel hub bearings and being able to effectively improve the accuracy of bench load test results for wheel hub bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] Figure 1 A schematic flow chart of a bench test method for a hub bearing according to the present application;

[0043] Figure 2 A schematic flow chart of the second embodiment of the bench test method for the hub bearing of the present application;

[0044] Figure 3 This is a schematic diagram of the module structure of a bench test device for a wheel hub bearing according to an embodiment of the present application;

[0045] Figure 4 It is a schematic diagram of the equipment structure of the hardware operating environment involved in the bench test method of the wheel hub bearing in the embodiment of the present application.

[0046] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0048] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0049] The main solution of the embodiment of the present application is: to obtain the fatigue life value of the wheel hub bearing under the comprehensive endurance test conditions of the whole vehicle; to determine the target bench load parameters based on the fatigue life value of the wheel hub bearing under the comprehensive endurance test conditions of the whole vehicle; and to perform a bench test of the wheel hub bearing according to the target bench load parameters.

[0050] The current technology mainly relies on the experience of previous historical models to formulate the wheel hub bearing bench durability test load, resulting in low accuracy of the wheel hub bearing bench load test results. Therefore, how to effectively improve the accuracy of the wheel hub bearing bench load test results is a problem that needs to be solved urgently.

[0051] The present application performs a bench test by determining the target bench load parameters based on the fatigue life values ​​of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle. The bench test can be performed quickly and accurately based on the target bench load parameters determined by the fatigue life values, thereby overcoming the technical defect of low accuracy of the wheel hub bearing bench load test results and effectively improving the accuracy of the wheel hub bearing bench load test results.

[0052] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a bench test device for a hub bearing, etc. The following takes the bench test device for a hub bearing as an example to illustrate this embodiment and the following embodiments.

[0053] Based on this, the embodiment of the present application provides a bench test method for a hub bearing, referring to Figure 1 , Figure 1 This is a schematic flow chart of a first embodiment of a bench test method for a hub bearing of the present application.

[0054] In this embodiment, the bench test method for the hub bearing comprises steps S10 to S30:

[0055] Step S10, obtaining the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle.

[0056] It should be noted that the fatigue life value refers to the number of cycles or time that the wheel hub bearing can withstand under certain load and stress conditions in the comprehensive durability test conditions of the whole vehicle. It is one of the important indicators for evaluating the durability performance of the wheel hub bearing. The comprehensive durability test conditions of the whole vehicle can include a variety of different driving conditions, driving modes, vehicle loads and other conditions to simulate the complex environment of the vehicle in actual use. These conditions have a direct impact on the fatigue life of the wheel hub bearing. Therefore, accurately obtaining the fatigue life value under these conditions is crucial for subsequent bench tests.

[0057] In addition, it should be noted that the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle can be obtained by conducting a comprehensive durability test on the whole vehicle and recording the fatigue life data of the wheel hub bearing under different load and stress conditions, and then obtaining the fatigue life value of the wheel hub bearing through data processing and analysis.

[0058] In a feasible implementation, step S10 may include: collecting the six-component load signals of the wheel center of the automobile under the comprehensive endurance test conditions of the whole vehicle; determining the wheel center vertical force load signal and the wheel center lateral force load signal according to the six-component load signals of the wheel center; and determining the fatigue life of the wheel hub bearing under the comprehensive endurance test conditions of the whole vehicle based on the wheel center vertical force load signal and the wheel center lateral force load signal.

[0059] It should be noted that a six-component force sensor is arranged at the wheel center of the car to collect the six-component force load signal of the wheel center under the comprehensive endurance test conditions of the whole vehicle. The six-component force load signal of the wheel center includes force load signals in multiple directions such as the vertical force load signal of the wheel center and the lateral force load signal of the wheel center. These signals are important factors in evaluating the fatigue life of the wheel hub bearing. By analyzing and processing these signals, the fatigue life value of the wheel hub bearing under the comprehensive endurance test conditions of the whole vehicle can be determined, providing an important reference for subsequent bench tests.

[0060] It is understandable that after collecting the six-component load signal of the wheel center, the signal can be filtered and denoised through signal processing technology to extract the vertical force load signal and the lateral force load signal of the wheel center. These signals reflect the stress conditions of the wheel hub bearing in different directions and are key indicators for evaluating the fatigue life of the wheel hub bearing. By analyzing and calculating these signals, the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle can be obtained, providing important data support for subsequent bench tests.

[0061] In summary, the bench test method of the wheel hub bearing described in the embodiment of the present application obtains the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle, determines the target bench load parameters, and conducts bench tests, which effectively improves the accuracy of the wheel hub bearing bench load test results and provides important support for the performance evaluation and improvement of the wheel hub bearing. At the same time, the method also has the advantages of simple operation and strong practicality, and has broad application prospects and promotion value.

[0062] In a feasible implementation manner, the method of determining the fatigue life of the wheel hub bearing under the comprehensive endurance test conditions of the whole vehicle based on the wheel center vertical force load signal and the wheel center lateral force load signal includes: obtaining the structural parameters of the wheel hub bearing and the bearing fatigue life curve; determining the fatigue life of the wheel hub bearing under the comprehensive endurance test conditions of the whole vehicle by obtaining the structural parameters of the wheel hub bearing and the bearing fatigue life curve according to the wheel center vertical force load signal and the wheel center lateral force load signal.

[0063] It should be noted that, taking the vertical force load signal and the lateral force load signal of the wheel center as input, combined with the relevant parameters of the hub bearing, that is, the structural parameters of the hub bearing, and the bearing fatigue life curve, the fatigue life of the hub bearing under the comprehensive durability test conditions of the whole vehicle can be obtained, and its value is Life_target.

[0064] It can be understood that the structural parameters of the hub bearing include at least: bearing span, distance from the outer bearing action point to the wheel center, distance from the inner bearing action point to the wheel center, bearing offset and tire rolling radius, etc. This embodiment does not impose specific restrictions on this.

[0065] It is worth noting that the bearing fatigue life curve refers to the relationship curve between the bearing fatigue life and the load it is subjected to, which can be obtained through experiments or simulations. This curve describes the number of cycles or time that the bearing can withstand under different load conditions, and is an important basis for evaluating the durability of the bearing. The bearing fatigue life curve can be used to determine the fatigue life of the hub bearing under the comprehensive durability test conditions of the whole vehicle based on the wheel center vertical force load signal and the wheel center lateral force load signal.

[0066] Step S20, determining a target bench load parameter based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition.

[0067] It should be noted that the stress condition and durability of the wheel hub bearing in actual use can be evaluated according to the fatigue life value, and then the load parameters of the bench test can be determined. These load parameters may include load size, load frequency, load cycle number, etc., to simulate the stress state under the working condition of the comprehensive durability test of the whole vehicle, and this embodiment does not impose specific restrictions on this. By reasonably determining the target bench load parameters, the durability of the wheel hub bearing can be more accurately evaluated, and the accuracy and reliability of the bench test can be improved.

[0068] Step S30: performing a bench test of the wheel hub bearing according to the target bench load parameter.

[0069] It should be noted that after the target bench load parameters are determined, the bench test of the wheel hub bearing is carried out. The bench test can simulate the stress state under the comprehensive durability test conditions of the whole vehicle, and load and cycle the wheel hub bearing to evaluate its durability performance. Through the bench test, the durability performance data of the wheel hub bearing can be obtained more quickly and accurately.

[0070] The present embodiment provides a bench test method for a wheel hub bearing. The present embodiment first obtains the fatigue life value of the wheel hub bearing under the working condition of a comprehensive endurance test of a whole vehicle, thereby facilitating setting the conditions of the bench test based on the actual working condition data of the comprehensive endurance test of the whole vehicle, thereby improving the accuracy and reliability of the bench test; determines the target bench load parameters based on the fatigue life value of the wheel hub bearing under the working condition of the comprehensive endurance test of the whole vehicle, thereby facilitating rapid and accurate determination of the bench load parameters; and performs a bench test on the wheel hub bearing according to the target bench load parameters, thereby effectively improving the accuracy of the bench load test results of the wheel hub bearing.

[0071] In summary, this embodiment performs bench testing by determining target bench load parameters based on fatigue life values ​​of the wheel hub bearing under comprehensive vehicle durability test conditions. The bench test can be performed quickly and accurately using the target bench load parameters determined based on fatigue life values, thereby overcoming the technical defect of low accuracy of bench load test results for wheel hub bearings and effectively improving the accuracy of bench load test results for wheel hub bearings.

[0072] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can refer to the above introduction, and will not be repeated later. Figure 2 , the step S20 further includes steps S201-S204:

[0073] Step S201, performing a durability test under a wheel hub bearing bench durability test condition to obtain a reference fatigue life value.

[0074] It should be noted that the reference fatigue life value refers to the life value of the wheel hub bearing under the endurance test on the bench.

[0075] Step S202, comparing the reference fatigue life value with the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test working condition to obtain a comparison result.

[0076] It should be noted that the test is carried out under the wheel hub bearing bench durability test conditions so that the life value of the wheel hub bearing under the bench test durability is consistent with the fatigue life Life_target under the vehicle comprehensive durability test conditions, that is, the equivalence of the bench test and the vehicle comprehensive durability test conditions is achieved, ensuring the accuracy and reliability of the test results.

[0077] It can be understood that the comparison results can reflect the differences between the bench test and the vehicle comprehensive durability test conditions, thereby providing a basis for adjusting the bench test conditions. The comparison results include consistent comparison results and inconsistent comparison results.

[0078] Step S203, when the comparison result is consistent, obtaining the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition.

[0079] It should be noted that the test bench load parameters include the vertical force borne by the wheel hub bearing, the lateral force borne by the wheel hub bearing, the wheel hub bearing rotation speed and the test duration.

[0080] It can be understood that under the wheel hub bearing bench durability test conditions, the vertical force borne by the wheel hub bearing is set to Fz_bench, the lateral force borne by the wheel hub bearing is set to Fy_bench, the wheel hub bearing speed is set to n_bench, and the test duration is set to t_bench. These four bench load parameters are solved so that the life value of the wheel hub bearing under the bench test durability is consistent with the fatigue life Life_target under the vehicle comprehensive durability test conditions. The individual variable X is set to i , then the parameter range of the bench load parameters is as follows:

[0081] X i =[x i _1x i _2x i _3x i _4] (Formula 1)

[0082] x i _1∈[Fz_bench_min, Fz_bench_max] (Formula 2)

[0083] x i _2∈[Fy_bench_min, Fy_bench_max] (Formula 3)

[0084] x i_3∈[n_bench_min, n_bench_max] (Formula 4)

[0085] x i_ 4∈[t_bench_min, t_bench_max] (Formula 5)

[0086] In equations 1 to 5, x i _1, x i _2, x i _3, x i _4 respectively represent the vertical force Fz_bench parameter borne by the hub bearing, the lateral force Fy_bench parameter borne by the hub bearing, the hub bearing speed n_bench parameter, and the test duration t_bench parameter under the hub bearing bench durability test conditions. Fz_bench_min and Fz_bench_max respectively represent the minimum constant parameter and the maximum constant parameter of the vertical force borne by the hub bearing, Fy_bench_min and Fy_bench_max respectively represent the minimum constant parameter and the maximum constant parameter of the lateral force borne by the hub bearing, n_bench_min and n_bench_max respectively represent the minimum constant parameter and the maximum constant parameter of the hub bearing speed, and t_bench_min and t_bench_max respectively represent the minimum constant parameter and the maximum constant parameter of the test duration.

[0087] Step S204, determining a target bench load parameter according to a parameter range of a bench load parameter under the wheel hub bearing bench durability test condition.

[0088] It should be noted that the target bench load parameters are the load parameters of the wheel hub bearing set under the bench test conditions to simulate the comprehensive endurance test conditions of the whole vehicle. The selection of these parameters needs to ensure that the life of the wheel hub bearing in the bench test is consistent with that in the comprehensive endurance test of the whole vehicle, so as to achieve the equivalence of the bench test and the comprehensive endurance test of the whole vehicle.

[0089] In a feasible implementation, step S204 may include: generating an initial individual population based on the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition; determining the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value; performing calculations based on the fitness function value of each individual in the initial individual population to obtain a probability distribution model; and determining the target bench load parameter based on the probability distribution model.

[0090] It should be noted that for individual X i, within the defined numerical range, randomly generate N individuals to form a group AX = {X1,…,X i ,…,X N}, where i∈[1,N] is the initial individual population, and the fitness function f(X i ), as shown in Formula 6:

[0091]

[0092] In formula 6, f(X i ) represents individual X i The fitness function value, Life_target represents the fatigue life value of the hub bearing under the comprehensive durability test conditions of the vehicle, L(X i ) represents individual X i The life value of the wheel hub bearing under the bench test under parameter conditions is:

[0093] It can be understood that the fitness function values ​​of the individuals in the initial individual population AX are sorted from large to small, and the probability distribution model of the top 25% ranked individuals is obtained, as shown in the following equations 7 and 8:

[0094]

[0095]

[0096] In equations 7 and 8, M represents the number of individuals with a 25% ranking, and x i _j When j=1, it indicates the vertical force Fz_bench parameter borne by the hub bearing; when j=2, it indicates the lateral force Fy_bench parameter borne by the hub bearing; when j=3, it indicates the hub bearing speed n_bench parameter; when j=4, it indicates the test duration t_bench parameter, μ j , σ j When j=1, it represents the mean and variance parameters of the vertical force Fz_bench parameter borne by the wheel hub bearing; when j=2, it represents the mean and variance parameters of the lateral force Fy_bench parameter borne by the wheel hub bearing; when j=3, it represents the mean and variance parameters of the wheel hub bearing speed n_bench parameter; and when j=4, it represents the mean and variance parameters of the test duration t_bench parameter.

[0097] In a feasible implementation manner, the target bench load parameters are determined based on the probability distribution model, including: generating a reference individual through the probability distribution model; generating a new initial individual population based on the reference individual and the initial individual population, and executing the step of determining the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value, until the iteration termination condition is met to obtain the target bench load parameters.

[0098] It should be noted that half of the individuals in the initial individual population AX are retained, and the other half are generated by the obtained probability distribution model, so as to obtain a new initial individual population, and the individuals in the new initial individual population are iteratively updated, as shown in the following equations 9 to 12:

[0099] x i _j(t+1)=x i _j(t)+v i _j(t+1) (Formula 9)

[0100] v i _j(t+1)=α·v i _j(t)+a1·b1·(x pest _j(t)-x i _j(t))+a2·b2·(x gest _j(t)-x i _j(t)) (Equation 10)

[0101] v i _j(t)=c·x i _j(t) (Equation 11)

[0102]

[0103] In equations 9 to 12, t represents the number of iterations, α represents the inertia coefficient parameter, and α max , α min They represent the maximum and minimum values ​​of the inertia coefficient, respectively. The maximum value is recommended to be 0.7, and the minimum value is recommended to be 0.4. max represents the maximum number of iterations, a1 and a2 represent random numbers between 0 and 1, c represents a random number between 0 and 1, b1 and b2 represent learning factor parameters, and the recommended value range is 0.5 to 2.5, x i _j(t+1),x i_j(t) represents the t+1 and t iterations respectively. When j=1, it represents the vertical force Fz_bench parameter borne by the hub bearing; when j=2, it represents the lateral force Fy_bench parameter borne by the hub bearing; when j=3, it represents the hub bearing speed n_bench parameter; when j=4, it represents the test duration t_bench parameter. i _j(t+1),v i _j(t) represents the time of t+1 and t iterations respectively. When j=1, it represents the speed parameter of the vertical force Fz_bench parameter borne by the hub bearing; when j=2, it represents the speed parameter of the lateral force Fy_bench parameter borne by the hub bearing; when j=3, it represents the speed parameter of the hub bearing speed n_bench parameter; when j=4, it represents the speed parameter of the test duration t_bench parameter. pest _j(t) represents the individual's optimal position at the tth iteration. The larger the value of the fitness function of the individual, the better the position. gest _j(t) represents the individual's optimal position for the entire group at the tth iteration. The larger the value of the individual's fitness function, the better the position.

[0104] It is understandable that when (Δ is the iteration error constant) or the number of iterations t reaches the maximum number of iterations T max , then the iteration operation is stopped and the individuals that meet the iteration error conditions are output. These individuals are the bench load parameters under the wheel hub bearing bench durability test conditions.

[0105] In this embodiment, the target bench load parameter can be determined quickly and accurately according to the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition, thereby improving the efficiency and accuracy of the wheel hub bearing bench test.

[0106] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the bench test method of the wheel hub bearing of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0107] This application also provides a bench test device for wheel hub bearings, please refer to Figure 3 , the bench test device of the wheel hub bearing comprises:

[0108] The acquisition module 10 is used to obtain the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle.

[0109] The determination module 20 is used to determine the target bench load parameter based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive endurance test condition.

[0110] The test module 30 is used to perform a bench test of the wheel hub bearing according to the target bench load parameter.

[0111] The present embodiment provides a bench test device for a wheel hub bearing. The present embodiment first obtains the fatigue life value of the wheel hub bearing under the working condition of a comprehensive endurance test of a whole vehicle, thereby facilitating setting the conditions of the bench test based on the actual working condition data of the comprehensive endurance test of the whole vehicle, thereby improving the accuracy and reliability of the bench test; determines the target bench load parameters based on the fatigue life value of the wheel hub bearing under the working condition of the comprehensive endurance test of the whole vehicle, thereby facilitating rapid and accurate determination of the bench load parameters; and performs a bench test of the wheel hub bearing according to the target bench load parameters, thereby effectively improving the accuracy of the bench load test results of the wheel hub bearing.

[0112] In summary, this embodiment performs bench testing by determining target bench load parameters based on fatigue life values ​​of the wheel hub bearing under comprehensive vehicle durability test conditions. The bench test can be performed quickly and accurately using the target bench load parameters determined based on fatigue life values, thereby overcoming the technical defect of low accuracy of bench load test results for wheel hub bearings and effectively improving the accuracy of bench load test results for wheel hub bearings.

[0113] Optionally, the acquisition module 10 is also used to collect the six-component load signals of the wheel center of the automobile under the comprehensive endurance test conditions of the whole vehicle; determine the wheel center vertical force load signal and the wheel center lateral force load signal according to the six-component load signals of the wheel center; and determine the fatigue life of the wheel hub bearing under the comprehensive endurance test conditions of the whole vehicle based on the wheel center vertical force load signal and the wheel center lateral force load signal.

[0114] Optionally, the acquisition module 10 is also used to obtain the structural parameters of the wheel hub bearing and the bearing fatigue life curve; according to the wheel center vertical force load signal and the wheel center lateral force load signal, the structural parameters of the wheel hub bearing and the bearing fatigue life curve are obtained to determine the fatigue life of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle.

[0115] Optionally, the structural parameters of the wheel hub bearing include at least: bearing span, distance from the outer bearing action point to the wheel center, distance from the inner bearing action point to the wheel center, bearing offset and tire rolling radius.

[0116] Optionally, the determination module 20 is further used to conduct a durability test under a wheel hub bearing bench durability test condition to obtain a reference fatigue life value; compare the reference fatigue life value with the fatigue life value of the wheel hub bearing under the comprehensive durability test condition of the whole vehicle to obtain a comparison result; when the comparison result is consistent, obtain the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition; determine the target bench load parameter according to the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition.

[0117] Optionally, the determination module 20 is also used to generate an initial individual population based on the parameter range of the bench load parameters under the wheel hub bearing bench durability test conditions; determine the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test conditions and the reference fatigue life value; perform calculations based on the fitness function values ​​of each individual in the initial individual population to obtain a probability distribution model; and determine the target bench load parameters based on the probability distribution model.

[0118] Optionally, the determination module 20 is further configured to generate a reference individual through the probability distribution model;

[0119] A new initial individual population is generated based on the reference individual and the initial individual population, and the step of determining the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value is performed until the iteration termination condition is met to obtain the target bench load parameter.

[0120] The bench test device for wheel hub bearings provided in the present application adopts the bench test method for wheel hub bearings in the above-mentioned embodiment, and can solve the technical problems of bench test for wheel hub bearings. Compared with the prior art, the beneficial effects of the bench test device for wheel hub bearings provided in the present application are the same as the beneficial effects of the bench test method for wheel hub bearings provided in the above-mentioned embodiment, and other technical features in the bench test device for wheel hub bearings are the same as the features disclosed in the above-mentioned embodiment method, which will not be described in detail here.

[0121] The present application provides a bench test device for a wheel hub bearing, the bench test device for a wheel hub bearing comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the bench test method for the wheel hub bearing in the above-mentioned embodiment one.

[0122] Reference below Figure 4, which shows a schematic diagram of the structure of a bench test device for a wheel hub bearing suitable for implementing the embodiment of the present application. The bench test device for a wheel hub bearing in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The bench test equipment for the wheel hub bearing shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0123] like Figure 4 As shown, the bench test equipment for wheel hub bearings may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. Various programs and data required for the operation of the bench test equipment for wheel hub bearings are also stored in RAM1004. The processing device 1001, ROM1002, and RAM1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the bench test equipment for the wheel hub bearing to communicate wirelessly or wired with other equipment to exchange data. Although the bench test equipment for the wheel hub bearing with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0124] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0125] The bench test equipment for wheel hub bearings provided in the present application adopts the bench test method for wheel hub bearings in the above-mentioned embodiment, and can solve the technical problems of bench test for wheel hub bearings. Compared with the prior art, the beneficial effects of the bench test equipment for wheel hub bearings provided in the present application are the same as the beneficial effects of the bench test method for wheel hub bearings provided in the above-mentioned embodiment, and other technical features in the bench test equipment for wheel hub bearings are the same as the features disclosed in the method of the previous embodiment, and will not be described in detail here.

[0126] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0127] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0128] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the bench test method of the wheel hub bearing in the above-mentioned embodiment.

[0129] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0130] The computer-readable storage medium may be included in the bench test equipment for the wheel hub bearing; or may exist independently without being assembled into the bench test equipment for the wheel hub bearing.

[0131] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the bench test equipment for the wheel hub bearing, the bench test equipment for the wheel hub bearing: obtains a pre-collision signal; controls the airbag to perform a first-stage ignition according to the pre-collision signal to deploy the airbag, wherein the airbag is located at a preset position in the vehicle; when the airbag is deployed, performs a collision detection on the vehicle to obtain a collision intensity; and controls the airbag to perform a second-stage ignition according to the collision intensity.

[0132] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0133] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a sequence different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0134] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0135] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the bench test method of the hub bearing, and can solve the technical problems of the bench test of the hub bearing. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the bench test method of the hub bearing provided in the above embodiment, and will not be elaborated here.

[0136] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the bench test method for a wheel hub bearing as described above are implemented.

[0137] The computer program product provided in this application can solve the technical problem of the bench test of the hub bearing. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the bench test method of the hub bearing provided in the above embodiment, which will not be repeated here.

[0138] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A bench test method for a wheel hub bearing, characterized in that: The method comprises: Obtain the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle; Determining a target bench load parameter based on a fatigue life value of the wheel hub bearing under a comprehensive vehicle durability test condition; Performing a bench test of the wheel hub bearing according to the target bench load parameter; The target bench load parameter is determined based on the fatigue life of the wheel hub bearing under the vehicle comprehensive durability test conditions, including: Conduct a durability test under the wheel hub bearing bench durability test conditions to obtain a reference fatigue life value; Comparing the reference fatigue life value with the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test working condition to obtain a comparison result; When the comparison result is consistent, obtaining a parameter range of a bench load parameter under a wheel hub bearing bench durability test condition; Determining a target bench load parameter according to a parameter range of a bench load parameter under the wheel hub bearing bench durability test condition; The step of determining the target bench load parameter according to the parameter range of the bench load parameter under the wheel hub bearing bench durability test condition comprises: generating an initial individual population based on a parameter range of a bench load parameter under the wheel hub bearing bench durability test condition; Determine the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value; Calculating based on the fitness function value of each individual in the initial individual population to obtain a probability distribution model; Generate a reference individual through the probability distribution model; A new initial individual population is generated based on the reference individual and the initial individual population, and the step of determining the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value is performed until the iteration termination condition is met to obtain the target bench load parameter.

2. The method according to claim 1, characterized in that The step of obtaining the fatigue life of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle includes: Collect the six-component force load signal of the wheel center under the vehicle comprehensive durability test conditions; Determining a wheel center vertical force load signal and a wheel center lateral force load signal according to the wheel center six-component force load signal; The fatigue life of the wheel hub bearing under the vehicle comprehensive durability test condition is determined based on the wheel center vertical force load signal and the wheel center lateral force load signal.

3. The method according to claim 2, characterized in that The determining of the fatigue life of the wheel hub bearing under the vehicle comprehensive durability test condition based on the wheel center vertical force load signal and the wheel center lateral force load signal comprises: Obtain the structural parameters of the wheel hub bearing and the bearing fatigue life curve; The fatigue life of the wheel hub bearing under the vehicle comprehensive durability test condition is determined based on the wheel center vertical force load signal and the wheel center lateral force load signal, the structural parameters of the wheel hub bearing and the bearing fatigue life curve.

4. The method according to claim 3, characterized in that The structural parameters of the hub bearing include at least: bearing span, distance from the outer bearing action point to the wheel center, distance from the inner bearing action point to the wheel center, bearing offset and tire rolling radius.

5. A bench test device for a wheel hub bearing, characterized in that: The bench test device of the wheel hub bearing comprises: An acquisition module is used to obtain the fatigue life value of the wheel hub bearing under the comprehensive durability test conditions of the whole vehicle; A determination module, used to determine a target bench load parameter based on a fatigue life value of the wheel hub bearing under a comprehensive endurance test condition of a whole vehicle; A test module, used for performing a bench test of the wheel hub bearing according to the target bench load parameter; The determination module is further used to perform a durability test under the wheel hub bearing bench durability test conditions to obtain a reference fatigue life value; Comparing the reference fatigue life value with the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test working condition to obtain a comparison result; When the comparison result is consistent, obtaining a parameter range of a bench load parameter under a wheel hub bearing bench durability test condition; Determining a target bench load parameter according to a parameter range of a bench load parameter under the wheel hub bearing bench durability test condition; The determination module is further used to generate an initial individual population based on a parameter range of a bench load parameter under the wheel hub bearing bench durability test condition; Determine the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value; Calculating based on the fitness function value of each individual in the initial individual population to obtain a probability distribution model; Generate a reference individual through the probability distribution model; A new initial individual population is generated based on the reference individual and the initial individual population, and the step of determining the fitness function value of each individual in the initial individual population based on the fatigue life value of the wheel hub bearing under the vehicle comprehensive durability test condition and the reference fatigue life value is performed until the iteration termination condition is met to obtain the target bench load parameter.

6. A bench test equipment for wheel hub bearings, characterized in that: The bench test equipment for the wheel hub bearing comprises: a memory, a processor and a bench test program for the wheel hub bearing stored in the memory and executable on the processor, wherein the bench test program for the wheel hub bearing is configured to implement the bench test method for the wheel hub bearing as described in any one of claims 1 to 4.

7. A storage medium, characterized in that: The storage medium stores a bench test program for a wheel hub bearing, and when the bench test program for the wheel hub bearing is executed by a processor, a bench test method for a wheel hub bearing according to any one of claims 1 to 4 is implemented.

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