Dynamic loading tire composite working condition testing method, device, equipment and medium

Abstract

The present invention discloses a method, device, equipment and medium for testing tire composite working conditions under dynamic loading. The method comprises: performing a preheating test on the target tire; performing at least one preset composite working condition test on the target tire, the preset composite working condition test is a test performed on the target tire under target parameters, the composite working conditions include roll and slant working conditions, slant and longitudinal slip working conditions and roll and longitudinal slip working conditions; based on the test results of at least one preset composite working condition test, testing and analyzing the target tire. The technical solution of the present application tests the target tire under preset composite working conditions to simulate the driving state of the actual tire on the road, thereby obtaining accurate test result data, so as to realize the accurate relationship between the various data by analyzing the test result data, so as to solve the problem of being unable to accurately express the influence of the mechanical properties under the composite working conditions of the automobile, and lay the foundation for the establishment of a theoretical model of composite working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile dynamics, and in particular to a method, device, equipment and medium for testing tire composite working conditions under dynamic loading. Background Art

[0002] Tires are crucial components of automobiles, transmitting all forces between the vehicle and the road. Tire mechanical properties are fundamental to vehicle performance analysis and design, and significantly impact vehicle safety, operational stability, ride quality, and other performance characteristics.

[0003] As automotive products continue to develop towards intelligent and unmanned driving, the number of vehicle usage scenarios and operating conditions continues to expand. However, models built using current testing methods cannot cover these diverse operating conditions. For example, existing technologies, such as tire longitudinal slip characteristics tests under dynamic loads and tire cornering characteristics tests under dynamic loads, only study tire mechanical properties under a single operating condition. Therefore, it is crucial to simulate and test tires under multiple operating conditions. Summary of the Invention

[0004] The present invention provides a method, device, equipment and medium for testing tire composite working conditions under dynamic loading, so as to solve the problem of being unable to accurately express the influence of composite working conditions on the mechanical properties of automobiles, and lay the foundation for the establishment of a theoretical model of composite working conditions.

[0005] According to one aspect of the present invention, a method for testing a tire under dynamic loading conditions is provided, the method comprising:

[0006] Perform a warm-up test on the target tire;

[0007] performing at least one preset composite operating condition test on the target tire, wherein the preset composite operating condition test is performed on the target tire under target parameters, the composite operating condition including a roll and yaw operating condition, a yaw and slip operating condition, and a roll and slip operating condition, and the target parameters including at least one of a load, a sideslip angle, a roll angle, and a slip rate;

[0008] Based on the test results of the at least one preset composite working condition test, the target tire is tested and analyzed.

[0009] According to another aspect of the present invention, a device for testing tires under dynamic loading in complex working conditions is provided, the device comprising:

[0010] A preheating module, used to perform a preheating test on the target tire;

[0011] a testing module, configured to perform at least one preset composite operating condition test on the target tire, wherein the preset composite operating condition test is performed on the target tire under target parameters, wherein the composite operating condition includes a roll and yaw operating condition, a yaw and slip operating condition, and a roll and slip operating condition, and wherein the target parameters include at least one of a load, a sideslip angle, a roll angle, and a slip ratio;

[0012] A data analysis module is used to test and analyze the target tire based on the test results of the at least one preset composite working condition test.

[0013] According to another aspect of the present invention, an electronic device is provided, comprising:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the method for testing tire composite working conditions under dynamic loading according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and wherein the computer instructions are used to enable a processor to implement the method for testing a tire under dynamic loading combined working conditions according to any embodiment of the present invention when executed.

[0018] The technical solution of the embodiment of the present invention is to preheat the target tire; then perform at least one preset composite working condition test on the target tire, the preset composite working condition test is a test performed on the target tire under target parameters, and the composite working conditions include roll and side bias working conditions, side bias and longitudinal slip working conditions, and roll and longitudinal slip working conditions; finally, based on the test results of at least one preset composite working condition test, the target tire is tested and analyzed. The technical solution of the present application tests the target tire under preset composite working conditions to simulate the actual driving state of the tire on the road, thereby obtaining accurate test result data, so as to achieve accurate deriving of the relationship between the various data by analyzing the test result data, thereby solving the problem of being unable to accurately express the influence of the mechanical properties under the composite working conditions of the automobile, and laying the foundation for the establishment of a theoretical model of composite working conditions.

[0019] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a flow chart of a method for testing a tire under dynamic loading conditions according to an embodiment of the present invention;

[0022] Figure 2 This is a flow chart of a method for testing a tire under dynamic loading conditions according to an embodiment of the present invention;

[0023] Figure 3 2 is a schematic structural diagram of a tire composite working condition testing device under dynamic loading according to an embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of an electronic device for implementing the tire composite working condition testing method under dynamic loading according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", "third", "fourth" and "target" in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] Example 1

[0028] Figure 1This is a flowchart of a method for testing tires under complex working conditions under dynamic loading provided by an embodiment of the present invention. This embodiment is applicable to dynamic loading tests on tires under different complex working conditions. This method can be performed by a device for testing tires under complex working conditions under dynamic loading. This device can be implemented in the form of hardware and / or software. This device can be configured in an electronic device that has a method for testing tires under complex working conditions under dynamic loading. Figure 1 As shown, the method includes:

[0029] S110: Perform a preheating test on the target tire.

[0030] Specifically, the tires being tested are generally new tires. In this case, a suitable tire is selected as the target tire based on actual needs. Before testing the target tire, some preparations need to be made. Specifically, the target tire and rim assembly is mounted on the test bench, and parameters such as tire pressure are adjusted to ensure that the target tire operates in a normal environment. Furthermore, since the target tire is generally new, residual stress may exist within the target tire, so a preheating test is required. The specific preheating test process is as follows:

[0031] Determine a rated load, a preset operating speed range, and a preset sideslip angle range; control the target tire to operate for a first preset time based on the rated load and the preset operating speed range; after the first preset time, control the target tire to operate for a second preset time based on the preset sideslip angle range; wherein the first preset time is greater than the second preset time; after the second operating time, control the tire to idle for a third preset time to complete a warm-up test on the tire.

[0032] For example, the rated load is set according to actual needs, the preset operating speed range is 20km / h to 120km / h, the first preset time is 10 minutes, the preset slip angle range is -1° to 1°, the second operating time is 1 minute, and the third preset time is 5 to 10 minutes. In order to eliminate the residual stress in the target tire, the target tire is controlled to run at a speed from 20km / h to 120km / h under the rated load for 10 minutes, followed by a 1-minute reciprocating motion at a slip angle (-1° to 1°) to ensure uniform heating of the tire and eliminate internal stress in the tire. The previous operation process of the target tire will cause the target tire to heat up, resulting in the accuracy of subsequent measurement results being affected. Therefore, the target tire needs to be idled for 5 to 10 minutes to cool the target tire, and the entire preheating test of the target tire has been completed.

[0033] S120. Perform at least one preset composite operating condition test on the target tire, wherein the preset composite operating condition test is performed on the target tire under target parameters, wherein the composite operating condition includes a roll and swerve operating condition, a swerve and longitudinal slip operating condition, and a roll and longitudinal slip operating condition, and the target parameters include at least one of a load, a sideslip angle, a roll angle, and a slip rate.

[0034] Specifically, tires are in direct contact with the road surface. Due to the complexity of the road surface, tires can experience various road conditions, including side slip, roll, longitudinal slip, and tilt-slip. To accurately establish a theoretical model of the vehicle in these conditions, testing is required to lay the foundation for the theoretical model. This application primarily describes testing of target tires under several combined operating conditions: side slip, side slip, and tilt-slip.

[0035] S130: Based on the test results of the at least one preset composite working condition test, test and analyze the target tire.

[0036] Specifically, the test results are actually data or curves obtained through sensors or calculations after testing the target tire under target parameters. In order to lay the foundation for the establishment of a theoretical model of composite working conditions, it is necessary to analyze the test results to obtain the relationship between the required data, and then accurately represent the changes in the mechanical properties of the tire due to the actual road conditions.

[0037] Optionally, to ensure the accuracy of the test results, it is necessary to perform a quality analysis on the test result data. If the quality analysis results show that the test results have a large deviation, the operation of S120 is repeated until the quality analysis results meet the actual requirements.

[0038] Since the test conditions are difficult to control, especially in high-frequency and slip rate control, the data quality is checked in two parts: one is the control accuracy check, which involves following the load and slip rate setting curves and repeatedly debugging the intervals with large errors to ensure high control accuracy; the other is the data acquisition quality check, which involves testing the collected data such as the time domain curves of the lateral force, longitudinal force and return torque.

[0039] The technical solution of the embodiment of the present invention is to preheat the target tire; then perform at least one preset composite working condition test on the target tire, the preset composite working condition test is a test performed on the target tire under target parameters, and the composite working conditions include roll and side bias working conditions, side bias and longitudinal slip working conditions, and roll and longitudinal slip working conditions; finally, based on the test results of at least one preset composite working condition test, the target tire is tested and analyzed. The technical solution of the present application tests the target tire under preset composite working conditions to simulate the actual driving state of the tire on the road, thereby obtaining accurate test result data, so as to achieve accurate deriving of the relationship between the various data by analyzing the test result data, thereby solving the problem of being unable to accurately express the influence of the mechanical properties under the composite working conditions of the automobile, and laying the foundation for the establishment of a theoretical model of composite working conditions.

[0040] Example 2

[0041] Figure 2 This is a flow chart of a method for testing a tire under dynamic loading conditions according to an embodiment of the present invention. This embodiment is a detailed description of S120 and S130 in the above embodiment. Figure 2 As shown, the method includes:

[0042] S210: Perform a preheating test on the target tire.

[0043] S220: When the preset composite working condition is the roll or side slip working condition, perform a preset composite working condition test on the target tire, and perform a test analysis on the target tire based on the test result of the preset composite working condition test.

[0044] Specifically, the test methods under roll and side slip conditions can be divided into at least two types:

[0045] The first method is to perform a dynamic load test at discrete points, wherein the target parameters include a first roll angle and a first slip angle, and then perform a preset composite working condition test on the target tire. Based on the test results of the preset composite working condition test, the specific process of testing and analyzing the target tire is as follows: determining the first roll angle and the first slip angle, and then performing a dynamic load test according to a preset load operation program based on the first roll angle and the first slip angle; wherein the preset load operation program includes a load loading method; further obtaining the target load, load frequency and first lateral force under the dynamic load test through a sensor, and finally determining the change pattern of the target load, load frequency and the first lateral force based on the target load, load frequency and the first lateral force.

[0046] For example, the first roll angle is determined to be -5° and 5°, and the first slip angle is -2°, 2°, 5° and 8°. Dynamic load tests are performed through eight combinations of two input parameters, and dynamic load tests are performed according to the preset load operation program (the load loading method is sinusoidal input). During this process, the target load, load frequency and first lateral force data are collected by the sensor. Based on the target load, load frequency and first lateral force data, a curve graph is drawn with the target load as the x-coordinate, the load frequency as the y-coordinate, and the first lateral force as the z-coordinate, so as to accurately describe the change law of the target load and load frequency and the first lateral force, and further obtain the lateral force change trend under different discrete slip angles / roll angles, so as to lay the foundation for the establishment of the subsequent theoretical model.

[0047] The second type: if the target parameters include a first load and a second slip angle, a preset composite working condition test is performed on the target tire, and based on the test results of the preset composite working condition test, the specific process of testing and analyzing the target tire is as follows: determining the first load, the second slip angle, and the preset roll angle motion range; then, based on the first load and the second slip angle, performing a dynamic load test in accordance with the roll loading method; obtaining the target roll angle, roll frequency, and second lateral force under the dynamic load test through a sensor; and further determining the change pattern of the target roll angle, roll frequency, and second lateral force based on the target roll angle, roll frequency, and second lateral force.

[0048] For example, a first load (a fixed load determined according to actual conditions) is determined, the second roll angle is -2°, 2°, 5°, and 8°, the preset roll angle motion range is -5° to 5°, and a dynamic load test is performed according to the roll loading method (sinusoidal loading). During the loading process, the target roll angle, roll frequency, and second lateral force are collected by the sensor, and a graph is drawn with the target roll angle as the x-coordinate, the roll frequency as the y-coordinate, and the second lateral force as the z-coordinate, so as to accurately derive the change law of the target roll angle, roll frequency, and the second lateral force, laying the foundation for the establishment of the subsequent theoretical model.

[0049] S230: When the preset composite operating condition is a lateral slip condition, perform a preset composite operating condition test on the target tire, and perform a test analysis on the target tire based on a test result of the preset composite operating condition test.

[0050] Specifically, the target parameters under the side slip condition include a third slip angle, a second load, and a first preset slip rate range. The specific process of performing the preset combined condition test on the target tire is as follows: determining the third slip angle, the second load, and the first preset slip rate range; then, based on the third slip angle, the second load, and the first preset slip rate range, performing a dynamic load test in a slip loading manner, thereby obtaining the first slip frequency, the third lateral force, the first longitudinal force, and the tire slip rate under the dynamic load test;

[0051] For example, the third slip angle is set to -5° and 5°, the second load is 40Li, 80Li and 120Li, the first preset slip rate movement range is -5% to 5%, and then a dynamic load test (sine sweep) is performed according to the slip loading method, so that the first slip frequency, the third lateral force and the first longitudinal force under the dynamic load test are obtained through the sensor, and the tire slip rate is obtained by calculation.

[0052] After obtaining the test results of the preset composite operating condition test, the target tire is tested and analyzed based on the test results of the preset composite operating condition test to study the longitudinal slip characteristics of the tire under different sideslip angles. Specifically, it can be divided into at least the following three situations:

[0053] The first method is to analyze and calculate the tire slip rate and the first longitudinal force, and then obtain the variation curve of the first longitudinal force and the tire slip rate, so as to facilitate the study of the tire longitudinal force-slip rate curve under multiple side slip angles.

[0054] The second method: Determine the target friction ellipse based on the third lateral force and the first longitudinal force; the friction ellipse is used to describe the variation between the lateral force and the longitudinal force. Then, based on the target friction ellipse and the first slip frequency, determine the variation between the friction ellipse and the first slip frequency. From this variation, it can be concluded that the distribution of the lateral and longitudinal friction coefficients between the tire and the road changes when the tire slip rate changes with variable frequency loading.

[0055] Method 3: Determine the lateral friction coefficient amplitude based on the third lateral force and the second load. For example, the relationship between the third lateral force amplitude and frequency can be obtained by performing a fast Fourier transform on the curve of the third lateral force and time. Because the ratio of the lateral force to the load is the lateral friction coefficient, the relationship between the third lateral force amplitude and frequency and the second load can be analyzed and calculated to accurately obtain the lateral friction coefficient amplitude.

[0056] The longitudinal friction coefficient amplitude is determined based on the first longitudinal force and the second load. For example, the relationship between the first longitudinal force amplitude and the frequency can be obtained by performing a fast Fourier transform on the curve of the first longitudinal force and time. Since the ratio of the longitudinal force to the load is the longitudinal friction coefficient, the longitudinal friction coefficient amplitude can be accurately obtained by analyzing and calculating the relationship between the first longitudinal force amplitude and the frequency and the second load.

[0057] Finally, based on the lateral friction coefficient amplitude and the first slip frequency, the changing law of the lateral friction coefficient amplitude and the first slip frequency can be accurately determined; at the same time, based on the longitudinal friction coefficient amplitude and the first slip frequency, the changing law of the lateral friction coefficient amplitude and the first slip frequency can be accurately determined, so as to facilitate the establishment of the subsequent theoretical model.

[0058] S240: When the preset combined operating condition is the roll and longitudinal slip operating condition, perform a preset combined operating condition test on the target tire, and perform a test analysis on the target tire based on the test result of the preset combined operating condition test.

[0059] Specifically, the target parameters under the roll and longitudinal slip conditions include the second roll angle, the third load, and the second preset slip rate range. A preset composite working condition test is performed on the target tire, and based on the test results of the preset composite working condition test, the target tire is tested and analyzed. The specific process is as follows:

[0060] A second roll angle, a third load, and a second preset slip rate motion range are determined, and then a dynamic load test is performed according to a slip loading method based on the second roll angle, the third load, and the second preset slip rate motion range. A second slip frequency and a fourth lateral force under the dynamic load test are further obtained, and then a lateral amplitude is determined based on a curve formed by the fourth lateral force. Finally, a variation pattern of the lateral amplitude and the second slip frequency is determined based on the lateral amplitude and the second slip frequency.

[0061] For example, the second roll angle is set to -5° and 5°, the third load is 40Li, 80Li and 120Li, the second preset slip rate motion range is -5% to 5%, and a dynamic load test is performed according to the slip loading method (sine sweep). During the dynamic load test, the second slip frequency and the fourth lateral force are obtained through the sensor, and then the curve consisting of the fourth lateral force and time is subjected to fast Fourier transform to accurately obtain the lateral amplitude. Finally, the lateral amplitude and the second slip frequency are determined to determine the change law of the lateral amplitude and the second slip frequency, so as to study the amplitude distribution in the frequency domain of the lateral force under different roll angles, so as to facilitate the establishment of the subsequent theoretical model.

[0062] The technical solution of the embodiment of the present invention is to perform a preheating test on the target tire to eliminate residual stress in the target tire, thereby facilitating accurate testing of the target tire; then, the target tire is tested under target parameters corresponding to different preset composite working conditions, that is, by simulating the driving state of the actual tire on the road, to obtain accurate test results, so as to analyze the data of the test results and accurately derive the relationship between the various data, thereby solving the problem of being unable to accurately express the impact of the mechanical properties of the automobile under composite working conditions, and laying the foundation for the establishment of a theoretical model of composite working conditions.

[0063] Example 3

[0064] Figure 3 This is a schematic diagram of a dynamic loading tire composite working condition testing device provided by an embodiment of the present invention. Figure 3 As shown, the device includes:

[0065] A preheating module 310 is used to perform a preheating test on a target tire;

[0066] a testing module 320 configured to perform at least one preset composite operating condition test on the target tire, wherein the preset composite operating condition test is performed on the target tire under target parameters, wherein the composite operating condition includes a roll and yaw condition, a yaw and slip condition, and a roll and slip condition, and wherein the target parameters include at least one of a load, a sideslip angle, a roll angle, and a slip ratio;

[0067] The data analysis module 330 is configured to perform test analysis on the target tire based on the test results of the at least one preset composite working condition test.

[0068] Optional preheating module, specifically used for:

[0069] Determine the rated load, preset operating speed range, and preset sideslip angle range;

[0070] Based on the rated load and the preset operating speed range, controlling the target tire to operate for a first preset time;

[0071] After the first preset time has elapsed, the target tire is controlled to run for a second preset time according to a preset side slip angle range; wherein the first preset time is greater than the second preset time;

[0072] After the second running time ends, the tire is controlled to idle for a third preset time to complete the preheating test on the tire.

[0073] Optionally, the preset composite operating condition is a roll or side slip operating condition, the target parameters include a first roll angle and a first side slip angle, and the test module includes a first test unit specifically configured to:

[0074] determining a first roll angle and a first slip angle;

[0075] Based on the first roll angle and the first slip angle, a dynamic load test is performed according to a preset load operation program; wherein the preset load operation program includes a load loading method;

[0076] Obtaining the target load, load frequency, and first lateral force under the dynamic load test;

[0077] Accordingly, the data analysis module includes a first data analysis unit, which is specifically configured to:

[0078] According to the target load, the load frequency and the first lateral force, a variation rule of the target load, the load frequency and the first lateral force is determined.

[0079] Optionally, the preset composite working condition is a roll and sideslip working condition, the target parameters include a first load and a preset roll angle motion range of a second sideslip angle, and the test module includes a second test unit specifically configured to:

[0080] determining a first load, a second slip angle, and a preset roll angle motion range;

[0081] performing a dynamic load test in a roll loading manner based on the first load, the second slip angle, and the preset roll angle motion range;

[0082] Obtain target roll angle, roll frequency and second lateral force under dynamic load test;

[0083] Accordingly, the data analysis module includes a second data analysis unit, which is specifically configured to:

[0084] A variation pattern of the target roll angle, the roll frequency, and the second lateral force is determined based on the target roll angle, the roll frequency, and the second lateral force.

[0085] Optionally, the preset composite working condition is a sideslip working condition, the target parameters include a third sideslip angle, a second load, and a first preset slip rate motion range, and the test module includes a third test unit specifically configured to:

[0086] determining a third slip angle, a second load, and a first predetermined slip ratio motion range;

[0087] performing a dynamic load test in a slip loading manner based on the third slip angle, the second load, and the first preset slip ratio motion range;

[0088] Obtaining the first slip frequency, the third lateral force, and the first longitudinal force under the dynamic load test;

[0089] Accordingly, the data analysis module includes a third data analysis unit, which is specifically configured to:

[0090] determining a target friction ellipse based on the third lateral force and the first longitudinal force; wherein the friction ellipse is used to describe the variation pattern between the lateral force and the longitudinal force;

[0091] Based on the target friction ellipse and the first slip frequency, a variation pattern of the friction ellipse and the first slip frequency is determined.

[0092] Optionally, the data analysis module includes a fourth data analysis unit, specifically configured to:

[0093] determining a lateral friction coefficient amplitude based on the third lateral force and the second load;

[0094] determining a longitudinal friction coefficient magnitude based on the first longitudinal force and the second load;

[0095] determining, based on the lateral friction coefficient amplitude and the first slip frequency, a variation pattern of the lateral friction coefficient amplitude and the first slip frequency;

[0096] Based on the longitudinal friction coefficient amplitude and the first slip frequency, a variation pattern of the lateral friction coefficient amplitude and the first slip frequency is determined.

[0097] Optionally, the preset composite working condition is a roll and longitudinal slip working condition, the target parameters include a second roll angle, a third load, and a second preset slip rate motion range, and the test module includes a fourth test unit specifically configured to:

[0098] determining a second roll angle, a third load, and a second predetermined slip ratio motion range;

[0099] performing a dynamic load test in a slip loading manner based on the second roll angle, the third load, and the second preset slip ratio motion range;

[0100] Obtain the second slip frequency and the fourth lateral force under dynamic load testing;

[0101] Accordingly, the data analysis module includes a fifth data analysis unit, which is specifically configured to:

[0102] determining a lateral amplitude based on a curve formed by the fourth lateral force;

[0103] Based on the lateral amplitude and the second slip frequency, a variation pattern of the lateral amplitude and the second slip frequency is determined.

[0104] The dynamic loading tire composite working condition testing device provided in the embodiment of the present invention can execute the dynamic loading tire composite working condition testing method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0105] The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations and do not violate public order and good morals.

[0106] Example 4

[0107] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0108] Figure 4A schematic diagram of the structure of an electronic device that can be used to implement the tire composite working condition testing method under dynamic loading according to an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0109] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0110] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0111] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors for running machine learning model algorithms, a digital signal processor (DSP), and any other suitable processor, controller, or microcontroller. The processor 11 executes the various methods and processes described above, such as the method for testing tire composite conditions under dynamic loading.

[0112] In some embodiments, the method for testing a tire under dynamic loading in a complex operating condition can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method for testing a tire under dynamic loading in a complex operating condition described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to execute the method for testing a tire under dynamic loading in a complex operating condition by any other suitable means (e.g., via firmware).

[0113] Various embodiments of the systems and techniques described above can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0114] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0115] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0116] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0117] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0118] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0119] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0120] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for testing tire composite working conditions under dynamic loading, characterized in that: include: Perform a warm-up test on the target tire; performing at least one preset composite operating condition test on the target tire, wherein the preset composite operating condition test is performed on the target tire under target parameters, the composite operating condition including a roll and yaw operating condition, a yaw and slip operating condition, and a roll and slip operating condition, and the target parameters including at least one of a load, a sideslip angle, a roll angle, and a slip rate; Performing a test analysis on the target tire based on the test result of the at least one preset composite working condition test; Among them, the target tire is preheated and tested, including: Determine the rated load, preset operating speed range, and preset sideslip angle range; Based on the rated load and the preset operating speed range, controlling the target tire to operate for a first preset time; After the first preset time has elapsed, the target tire is controlled to run for a second preset time according to a preset side slip angle range; wherein the first preset time is greater than the second preset time; After the second running time ends, controlling the tire to idle for a third preset time to complete a preheating test on the tire; The preset composite operating condition is a side slip condition, the target parameters include a third side slip angle, a second load, and a first preset slip rate range, and at least one preset composite operating condition test is performed on the target tire, including: determining a third slip angle, a second load, and a first predetermined slip ratio motion range; performing a dynamic load test in a slip loading manner based on the third slip angle, the second load, and the first preset slip ratio motion range; Obtaining the first slip frequency, the third lateral force, and the first longitudinal force under the dynamic load test; Accordingly, based on the test results of the at least one preset composite working condition test, the target tire is tested and analyzed, including: determining a target friction ellipse based on the third lateral force and the first longitudinal force; wherein the friction ellipse is used to describe the variation pattern between the lateral force and the longitudinal force; determining, based on the target friction ellipse and the first slip frequency, a change rule of the friction ellipse and the first slip frequency; The step of testing and analyzing the target tire based on the test result of the at least one preset composite working condition test includes: determining a lateral friction coefficient amplitude based on the third lateral force and the second load; determining a longitudinal friction coefficient magnitude based on the first longitudinal force and the second load; determining, based on the lateral friction coefficient amplitude and the first slip frequency, a variation pattern of the lateral friction coefficient amplitude and the first slip frequency; Based on the longitudinal friction coefficient amplitude and the first slip frequency, a variation pattern of the longitudinal friction coefficient amplitude and the first slip frequency is determined.

2. The method according to claim 1, characterized in that The preset composite operating condition is a roll or side slip operating condition, the target parameters include a first roll angle and a first side slip angle, and performing at least one preset composite operating condition test on the target tire includes: determining a first roll angle and a first slip angle; Based on the first roll angle and the first slip angle, a dynamic load test is performed according to a preset load operation program; wherein the preset load operation program includes a load loading method; Obtaining the target load, load frequency, and first lateral force under the dynamic load test; Accordingly, based on the test results of the at least one preset composite working condition test, the target tire is tested and analyzed, including: According to the target load, the load frequency and the first lateral force, a variation rule of the target load, the load frequency and the first lateral force is determined.

3. The method according to claim 1, characterized in that The preset composite working condition is a roll or side slip working condition, the target parameters include a first load, a second side slip angle, and a preset roll angle motion range, and performing at least one preset composite working condition test on the target tire includes: determining a first load, a second slip angle, and a preset roll angle motion range; performing a dynamic load test in a roll loading manner based on the first load, the second slip angle, and the preset roll angle motion range; Obtain target roll angle, roll frequency and second lateral force under dynamic load test; Accordingly, based on the test results of the at least one preset composite working condition test, the target tire is tested and analyzed, including: A variation pattern of the target roll angle, the roll frequency, and the second lateral force is determined based on the target roll angle, the roll frequency, and the second lateral force.

4. The method according to claim 1, wherein The preset composite operating condition is a roll and longitudinal slip operating condition, the target parameters include a second roll angle, a third load, and a second preset slip rate motion range, and performing at least one preset composite operating condition test on the target tire includes: determining a second roll angle, a third load, and a second predetermined slip ratio motion range; performing a dynamic load test in a slip loading manner based on the second roll angle, the third load, and the second preset slip ratio motion range; Obtain the second slip frequency and the fourth lateral force under dynamic load testing; Accordingly, based on the test results of the at least one preset composite working condition test, the target tire is tested and analyzed, including: determining a lateral amplitude based on a curve formed by the fourth lateral force; Based on the lateral amplitude and the second slip frequency, a variation pattern of the lateral amplitude and the second slip frequency is determined.

5. A tire composite working condition testing device under dynamic loading, characterized in that: The method for testing tire composite working conditions under dynamic loading according to any one of claims 1 to 4 is adopted, wherein the device comprises: A preheating module, used to perform a preheating test on the target tire; a testing module, configured to perform at least one preset composite operating condition test on the target tire, wherein the preset composite operating condition test is performed on the target tire under target parameters, wherein the composite operating condition includes a roll and yaw operating condition, a yaw and slip operating condition, and a roll and slip operating condition, and wherein the target parameters include at least one of a load, a sideslip angle, a roll angle, and a slip ratio; a data analysis module, configured to perform test analysis on the target tire based on the test results of the at least one preset composite working condition test; The preheating module is specifically configured to: determine a rated load, a preset operating speed range, and a preset side slip angle range; control the target tire to operate for a first preset time based on the rated load and the preset operating speed range; after the first preset time, control the target tire to operate for a second preset time based on a preset side slip angle range; wherein the first preset time is greater than the second preset time; and after the second operating time, control the tire to idle for a third preset time to complete a preheating test on the tire; The preset composite working condition is a sideslip working condition, the target parameters include a third sideslip angle, a second load, and a first preset slip rate range, and the test module includes a third test unit, specifically configured to: determine the third sideslip angle, the second load, and the first preset slip rate range; perform a dynamic load test in a slip loading mode based on the third sideslip angle, the second load, and the first preset slip rate range; and obtain a first slip frequency, a third lateral force, and a first longitudinal force under the dynamic load test; Accordingly, the data analysis module includes a third data analysis unit, specifically configured to: determine a target friction ellipse based on the third lateral force and the first longitudinal force; wherein the friction ellipse is used to describe a variation pattern between the lateral force and the longitudinal force; and determine a variation pattern between the friction ellipse and the first slip frequency based on the target friction ellipse and the first slip frequency; Among them, the data analysis module includes a fourth data analysis unit, which is specifically used to: determine the lateral friction coefficient amplitude based on the third lateral force and the second load; determine the longitudinal friction coefficient amplitude based on the first longitudinal force and the second load; determine the change law of the lateral friction coefficient amplitude and the first slip frequency based on the lateral friction coefficient amplitude and the first slip frequency; determine the change law of the longitudinal friction coefficient amplitude and the first slip frequency based on the longitudinal friction coefficient amplitude and the first slip frequency.

6. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the method for testing tire composite working conditions under dynamic loading according to any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for testing a tire under dynamic loading in complex working conditions according to any one of claims 1 to 4 when executed.

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