Tire high-speed uniformity dynamic test method, device and equipment under multi-axis excitation

Abstract

The invention discloses a tire high-speed uniformity dynamic test method, device and equipment under multi-axis excitation, and relates to the technical field of vehicles. The tire high-speed uniformity dynamic test method under multi-axis excitation comprises the steps that a tire is installed on a test bed with a rotary drum, the test bed is controlled to apply lateral excitation to the tire according to multiple lateral displacements, a high-speed uniformity dynamic test is carried out, and a first test result is obtained; according to the plurality of longitudinal slip rates, controlling the test bed to apply longitudinal excitation to the tire and perform high-speed uniformity dynamic test to obtain a second test result; according to a plurality of composite parameters obtained by combining a plurality of lateral displacements and a plurality of longitudinal slip rates in pairs, controlling the test bed to apply composite excitation to the tire and perform high-speed uniformity dynamic test to obtain a third test result; and summarizing the three test results to obtain a high-speed uniformity dynamic test result of the tire. According to the method, the high-speed uniformity performance of the tire under the complex working condition can be evaluated more comprehensively.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, device and equipment for dynamic testing of tire high-speed uniformity under multi-axis excitation. Background Art

[0002] Tire high-speed uniformity refers to the degree of fluctuation in a tire's mechanical properties (such as radial force, lateral force, and longitudinal force) at different frequencies during high-speed driving. This fluctuation directly impacts vehicle handling, comfort, and safety. Issues such as steering wheel shake and body resonance are directly related to tire high-speed uniformity. Existing technologies typically only consider the impact of force fluctuations in a single direction on tire high-speed uniformity, often ignoring the coupled effects of lateral and longitudinal excitation on tire high-speed uniformity. This results in limited applicability of the final test results under complex operating conditions. Summary of the Invention

[0003] The main purpose of the embodiments of the present application is to provide a method, device and equipment for dynamic testing of high-speed uniformity of tires under multi-axis excitation, aiming to more comprehensively evaluate the high-speed uniformity performance of tires under complex working conditions.

[0004] To achieve the above objectives, one aspect of an embodiment of the present application provides a method for dynamic testing of tire uniformity at high speed under multi-axis excitation. The tire is mounted on a test bench having a rotating drum. The method comprises: controlling the test bench to apply lateral excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset lateral displacements to obtain a first test result; controlling the test bench to apply longitudinal excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset longitudinal slip rates to obtain a second test result; controlling the test bench to apply a composite excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of composite parameters, thereby obtaining a third test result; wherein the plurality of composite parameters are obtained by combining the plurality of lateral displacements and the plurality of longitudinal slip rates in pairs; The first test result, the second test result, and the third test result are summarized to obtain a high-speed uniformity dynamic test result of the tire.

[0005] In some embodiments, controlling the test bench to apply lateral excitation to the tire and perform a high-speed uniformity dynamic test based on the preset multiple lateral displacements to obtain a first test result includes: controlling the test bench to perform lateral translation of the drum according to each lateral displacement, and performing a radial force-lateral force coupling test on the tire under dynamic load and high speed conditions, to obtain test data of the tire under each lateral displacement; The first test result is obtained by performing calculations based on the test data of the tire under the multiple lateral displacements.

[0006] In some embodiments, the test data of the tire at each lateral displacement includes a first radial force, a first initial lateral force, and a first lateral force of the tire at each lateral displacement; and calculating based on the test data of the tire at the multiple lateral displacements to obtain the first test result includes: Calculating, based on the first radial force, the first initial lateral force, and the first lateral force of the tire under the multiple lateral displacements, a first radial force change value and a first lateral force change value of the tire under the multiple lateral displacements; According to a preset first radial weight and a first lateral weight, a weighted calculation is performed on the first radial force change value and the first lateral force change value of the tire under the multiple lateral displacements to obtain the first test result.

[0007] In some embodiments, controlling the test bench to apply longitudinal excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of preset longitudinal slip rates to obtain the second test result includes: controlling the test bench to perform dual-axis driving of the drum and the tire according to each longitudinal slip rate, and performing a radial force-longitudinal force coupling test on the tire under dynamic load and high-speed conditions to obtain test data of the tire at each longitudinal slip rate; The second test result is obtained by performing calculations based on the test data of the tire at the multiple longitudinal slip rates.

[0008] In some embodiments, the test data of the tire at each longitudinal slip rate includes the second radial force, the first initial longitudinal force, and the first longitudinal force of the tire at each longitudinal slip rate; and calculating the second test result based on the test data of the tire at the multiple longitudinal slip rates includes: calculating, based on the second radial force, the first initial longitudinal force, and the first longitudinal force of the tire at the multiple longitudinal slip rates, a second radial force change value and a first longitudinal force change value of the tire at the multiple longitudinal slip rates; The second radial force change value and the first longitudinal force change value of the tire under the multiple longitudinal slip rates are weightedly calculated according to the preset second radial weight and the first longitudinal weight to obtain the second test result.

[0009] In some embodiments, controlling the test bench to apply composite excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of composite parameters to obtain a third test result includes: Controlling the test bench to perform lateral translation of the drum according to the lateral displacement included in each of the composite parameters, and to perform dual-axis driving of the drum and the tire according to the longitudinal slip rate included in each of the composite parameters, and performing a radial force-lateral force-longitudinal force coupling test on the tire under dynamic load and high-speed conditions to obtain test data of the tire under each of the composite parameters; The third test result is obtained by performing calculations based on the test data of the tire under the plurality of composite parameters.

[0010] In some embodiments, the test data of the tire under each of the composite parameters includes a third radial force, a second initial lateral force, a second lateral force, a second initial longitudinal force, and a second longitudinal force of the tire under each of the composite parameters; and calculating the third test result based on the test data of the tire under the plurality of composite parameters includes: calculating, based on the third radial force, the second initial lateral force, the second lateral force, the second initial longitudinal force, and the second longitudinal force of the tire under the plurality of composite parameters, a third radial force change value, a second lateral force change value, and a second longitudinal force change value of the tire under the plurality of composite parameters; According to the preset third radial weight, second lateral weight and second longitudinal weight, the third radial force change value, second lateral force change value and second longitudinal force change value of the tire under the several composite parameters are weightedly calculated to obtain the third test result.

[0011] In some embodiments, the method further comprises: Before performing the high-speed uniformity dynamic test on the tire, the test bench is controlled to perform a preheating test on the tire.

[0012] To achieve the above objectives, another aspect of the present invention provides a high-speed tire uniformity dynamic testing device under multi-axis excitation. The tire is mounted on a test bench with a rotating drum. The device includes: a first module, configured to control the test bench to apply lateral excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset lateral displacements, thereby obtaining a first test result; a second module, configured to control the test bench to apply longitudinal excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset longitudinal slip rates, to obtain a second test result; a third module, configured to control the test bench to apply a composite excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of composite parameters, thereby obtaining a third test result; wherein the plurality of composite parameters are obtained by combining the plurality of lateral displacements and the plurality of longitudinal slip rates in pairs; The fourth module is used to summarize the first test result, the second test result and the third test result to obtain a high-speed uniformity dynamic test result of the tire.

[0013] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application proposes an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the above-mentioned dynamic testing method for high-speed uniformity of tires under multi-axis excitation.

[0014] The embodiments of the present application include at least the following beneficial effects: by controlling a test bench with a rotating drum to apply different types of excitations to the tire and load dynamic loads to perform high-speed uniformity testing according to different key parameters, and taking into account the coupling effects of different types of excitations on the high-speed uniformity of the tire during the test, the high-speed uniformity performance of the tire under complex working conditions can be evaluated more comprehensively and reliably, thereby improving the applicability of the final test results under complex working conditions.

[0015] It is understandable that the beneficial effects of the tire high-speed uniformity dynamic testing device and electronic equipment under multi-axis excitation disclosed in this application are the same as the beneficial effects of the tire high-speed uniformity dynamic testing method under multi-axis excitation, and will not be repeated here.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 1 is a flow chart of a method for dynamic testing of tire uniformity at high speed under multi-axis excitation provided in an embodiment of the present application; Figure 2 This is a schematic block diagram of the module composition of a dynamic testing device for high-speed uniformity of tires under multi-axis excitation provided in an embodiment of the present application; Figure 3 This is a schematic diagram of the hardware structure of an electronic device provided in some embodiments of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the reference to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application, and the appearance of the phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are merely examples of devices and methods that are consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0019] It will be appreciated that the terms "first", "second", etc. used herein may be used herein to describe various concepts, but unless otherwise specified, these concepts are not limited by these terms. These terms are merely used to distinguish one concept from another. For example, without departing from the scope of the embodiments of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if", "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determination". The terms "at least one", "a plurality", "each", "any", etc. used herein include one, two or more, a plurality include two or more, each refers to each of the corresponding plurality, and any refers to any one of the plurality.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0021] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0022] With the development of the automotive industry, users have placed higher demands on vehicle performance. As the only component of the vehicle that comes into contact with the ground, the performance of the tire is crucial to improving vehicle performance. Tire high-speed uniformity refers to the degree of fluctuation of the mechanical properties of the tire (such as radial force, lateral force, longitudinal force, etc.) at different frequencies when the tire is driving at high speed. It directly affects the vehicle's handling, comfort, and safety. For example, problems such as steering wheel vibration and body resonance are directly related to the tire's high-speed uniformity. In the existing technology, only the impact of force fluctuations in a single direction on the tire's high-speed uniformity is usually considered, and the coupled effects of lateral excitation and longitudinal excitation on the tire's high-speed uniformity are often ignored. In addition, a single vertical loading method is usually used, using a fixed load, and ignoring the dynamic changes of the load with vehicle speed and acceleration during actual driving. This makes the final test results less applicable under complex working conditions.

[0023] In view of this, the embodiments of the present application provide a method, device and equipment for dynamic testing of high-speed uniformity of tires under multi-axis excitation. This solution controls a test bench with a rotating drum to apply different types of excitations to the tire and load dynamic loads according to different key parameters to perform high-speed uniformity testing. During the test process, the coupling effects of different types of excitations on the high-speed uniformity of the tire are taken into account, which can more comprehensively and reliably evaluate the high-speed uniformity performance of the tire under complex working conditions, and improve the applicability of the final test results under complex working conditions.

[0024] The embodiment of the present application provides a method for dynamic testing tire uniformity at high speed under multi-axis excitation, which can be applied to the electronic device provided in the embodiment of the present application, which can be a terminal or a server. The terminal can be, but is not limited to, a tablet computer, a laptop computer, a desktop computer, etc. The server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution networks, and big data and artificial intelligence platforms.

[0025] Please refer to Figure 1 , Figure 1 This is a flow chart of a method for dynamic testing of high-speed uniformity of tires under multi-axis excitation provided in an embodiment of the present application; it should be noted that although a logical sequence is shown in the flow chart, in some cases, the steps shown or described may be performed in an order different from that shown here.

[0026] The present application provides a method for dynamic testing of tire uniformity at high speed under multi-axis excitation. The tire is mounted on a test bench with a rotating drum for testing. The method may include, but is not limited to, steps S101 to S104, which are specifically as follows: S101. Controlling the test bench to apply lateral excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of preset lateral displacements to obtain a first test result. S102. Controlling the test bench to apply longitudinal excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of preset longitudinal slip rates to obtain a second test result. S103. Controlling the test bench to apply a composite excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of composite parameters, thereby obtaining a third test result; wherein the plurality of composite parameters are obtained by combining a plurality of lateral displacements and a plurality of longitudinal slip rates in pairs; S104 , summarizing the first test result, the second test result, and the third test result to obtain a high-speed uniformity dynamic test result of the tire.

[0027] The four steps S101 to S104 shown in the embodiment of the present application can more comprehensively evaluate the high-speed uniformity performance of the tire under complex working conditions by applying different types of excitations to the tire according to different key parameters and loading dynamic loads to perform high-speed uniformity testing.

[0028] It should be noted that the present application does not limit the order of execution of the three tire high-speed uniformity dynamic tests proposed in S101 to S103 above, that is, the tire high-speed uniformity dynamic test proposed in S102 above can be executed first, then the tire high-speed uniformity dynamic test proposed in S101 above can be executed, and finally the tire high-speed uniformity dynamic test proposed in S103 above can be executed.

[0029] In an embodiment of the present application, a test bench with a rotating drum is a device for simulating actual road conditions and is widely used in performance testing of automobile tires. The rotation of the rotating drum can simulate various road conditions during vehicle driving, such as flat roads, slopes, or complex roads. When performing performance testing on a tire, the tire and rim assembly is mounted on the test bench, and a multi-axis force sensor and a multi-directional exciter can be installed on the test bench. The multi-axis force sensor can be used to collect the tire lateral force, tire longitudinal force, and tire radial force generated during the test. Tire lateral force generally refers to the horizontal force exerted on the tire during cornering or sideslipping. Tire longitudinal force generally refers to the force exerted on the tire along the vehicle's forward direction during acceleration or braking. Tire radial force generally refers to the force exerted on the tire perpendicular to the ground, which is usually related to vibration caused by uneven road surface. The multi-directional exciter can be used to apply vibration excitation to the tire from different directions (such as vertical, lateral, and longitudinal) to simulate the complex vibration environment when the vehicle is driving on an actual road.

[0030] In some embodiments, in S101, the test bench may be controlled to apply lateral excitation to the tire according to a plurality of preset lateral displacements, and a high-speed uniformity test may be performed on the tire under a dynamic load to obtain a first test result. The implementation process may include, but is not limited to, steps S201 to S202, which are specifically as follows: S201, controlling the test bench to perform lateral translation of the drum according to each lateral displacement to apply lateral excitation to the tire, and performing a radial force-lateral force coupling test on the tire under dynamic load and high-speed conditions to obtain test data of the tire under each lateral displacement; S202: Calculate based on the test data of the tire under multiple lateral displacements to obtain a first test result.

[0031] In the embodiment of the present application, by applying different degrees of lateral excitation to the tire and performing a high-speed uniformity test on the tire, it helps the tester to better understand whether there are potential problems with the tire during high-speed rotation, such as lateral vibration or offset caused by uneven mass distribution. This can prevent the vehicle from using poor tires and affecting its straight-line driving stability and safety.

[0032] In S201 of some embodiments, during the radial force-lateral force coupling test on the tire, considering that the tire radial force changes due to the axle load transfer, a sinusoidal wave dynamic load should be used as the tire radial force input to simulate the dynamic change of the load with vehicle speed and acceleration in actual driving conditions, wherein the dynamic load is obtained by appropriately adjusting the design load; and when the drum is in different excitation positions, the tire can be tested five times in a cycle to simulate the lateral force change caused by the tire under high-speed cornering conditions, and then the results of the five cycle tests are averaged to obtain the test data of the tire under each lateral displacement.

[0033] In S202 of some embodiments, the test data of the tire at each lateral displacement includes a first radial force, a first initial lateral force, and a first lateral force of the tire at each lateral displacement. The first initial lateral force can be understood as the initial lateral force of the tire when the lateral displacement is initially loaded, and the first lateral force can be understood as the lateral force of the tire after the lateral displacement is loaded and during the rotation of the drum. Regarding the step of calculating based on the test data of the tire at multiple lateral displacements to obtain a first test result, its implementation process can be, but is not limited to, including steps S301 to S302, which are specifically as follows: S301: Calculating, based on a first radial force, a first initial lateral force, and a first lateral force of the tire under multiple lateral displacements, to obtain a first radial force change value and a first lateral force change value of the tire under the multiple lateral displacements; Specifically, a lateral displacement is selected from multiple lateral displacements as a reference lateral displacement, and the first radial force of the tire under the multiple lateral displacements is subtracted from the first radial force of the tire under the reference lateral displacement to obtain the first radial force change value of the tire under the multiple lateral displacements; the first lateral force of the tire under each lateral displacement is subtracted from the first initial lateral force to obtain the first lateral force change value of the tire under each lateral displacement.

[0034] S302: performing weighted calculation on first radial force change values ​​and first lateral force change values ​​of the tire under multiple lateral displacements according to a preset first radial weight and a first lateral weight to obtain a first test result; Specifically, for each lateral displacement, the first radial force change value of the tire under the lateral displacement is divided by the design load to obtain a first quotient value, the first lateral force change value of the tire under the lateral displacement is divided by the first initial lateral force to obtain a second quotient value, the first quotient value is multiplied by the first radial weight, the second quotient value is multiplied by the first lateral weight, and the two multiplication results are added to obtain the first high-speed uniformity evaluation index value of the tire under the lateral displacement; then, the first high-speed uniformity evaluation index values ​​of the tire under multiple lateral displacements are summarized to obtain a first test result. Among them, the first radial weight is used to represent the ratio of the first radial force change value to the first high-speed uniformity evaluation index value, which is preferably set to 0.5; the first lateral weight is used to represent the ratio of the first lateral force change value to the first high-speed uniformity evaluation index value, which is preferably set to 0.5.

[0035] In S102 of some embodiments, the test bench may be controlled to apply longitudinal excitation to the tire according to a plurality of preset longitudinal slip rates, and a high-speed uniformity test may be performed on the tire under a dynamic load to obtain a second test result. The implementation process may include, but is not limited to, steps S401 to S402, as follows: S401. Controlling the test bench to drive the drum and the tire biaxially according to each longitudinal slip rate to apply longitudinal excitation to the tire, and performing a radial force-longitudinal force coupling test on the tire under dynamic load and high speed conditions to obtain test data for the tire at each longitudinal slip rate; S402: Calculate according to the test data of the tire at multiple longitudinal slip rates to obtain a second test result.

[0036] In the embodiment of the present application, by applying different degrees of longitudinal excitation to the tire and performing a high-speed uniformity test on the tire, it helps the tester to better understand whether there are potential problems with the tire during high-speed rotation, such as longitudinal vibration or abnormal wear caused by uneven mass distribution. This can prevent the vehicle from using poor tires and affecting its acceleration performance and braking effect.

[0037] In S401 of some embodiments, during the radial force-longitudinal force coupling test on the tire, considering that the tire radial force changes due to axle load transfer, a sinusoidal dynamic load should be used as the tire radial force input to simulate the dynamic change of the load with vehicle speed and acceleration in actual driving conditions, wherein the dynamic load is obtained by appropriately adjusting the design load; and when the tire is at different longitudinal slip rates, the tire can be tested five times in a cycle to simulate the longitudinal force changes caused by the tire under driving and braking conditions, and the results of the five cycle tests are then averaged to obtain the test data of the tire at each longitudinal slip rate.

[0038] In S402 of some embodiments, the test data of the tire at each longitudinal slip rate includes the second radial force, the first initial longitudinal force, and the first longitudinal force of the tire at each longitudinal slip rate. The first initial longitudinal force can be understood as the initial longitudinal force of the tire when the longitudinal slip rate is initially loaded, and the first longitudinal force can be understood as the longitudinal force of the tire after the longitudinal slip rate is loaded and during the rotation of the drum. Regarding the step of calculating based on the test data of the tire at multiple longitudinal slip rates to obtain the second test result, its implementation process can be, but is not limited to, including steps S501 to S502, which are specifically as follows: S501: Calculating, based on the second radial force, the first initial longitudinal force, and the first longitudinal force of the tire at multiple longitudinal slip rates, to obtain a second radial force change value and a first longitudinal force change value of the tire at multiple longitudinal slip rates; Specifically, a longitudinal slip rate is selected from a plurality of longitudinal slip rates as a reference longitudinal slip rate, and the second radial force of the tire at the plurality of longitudinal slip rates is subtracted from the second radial force of the tire at the reference longitudinal slip rate to obtain the second radial force change value of the tire at the plurality of longitudinal slip rates; the first longitudinal force of the tire at each longitudinal slip rate is subtracted from the first initial longitudinal force to obtain the first longitudinal force change value of the tire at each longitudinal slip rate.

[0039] S502: Perform weighted calculation on the second radial force change value and the first longitudinal force change value of the tire at multiple longitudinal slip rates according to the preset second radial weight and the first longitudinal weight to obtain a second test result; Specifically, for each longitudinal slip rate, the second radial force change value of the tire at that longitudinal slip rate is divided by the design load to obtain a third quotient value, the first longitudinal force change value of the tire at that longitudinal slip rate is divided by the first initial longitudinal force to obtain a fourth quotient value, the third quotient value is multiplied by the second radial weight, the fourth quotient value is multiplied by the first longitudinal weight, and the two multiplication results are added together to obtain the second high-speed uniformity evaluation index value of the tire at that longitudinal slip rate; the second high-speed uniformity evaluation index values ​​of the tire at multiple longitudinal slip rates are then summarized to obtain a second test result. The second radial weight is used to represent the ratio of the second radial force change value to the second high-speed uniformity evaluation index value, and is preferably set to 0.5; the first longitudinal weight is used to represent the ratio of the first longitudinal force change value to the second high-speed uniformity evaluation index value, and is preferably set to 0.5.

[0040] In S103 of some embodiments, the test bench may be controlled to apply a composite excitation to the tire according to a plurality of composite parameters, and perform a high-speed uniformity test on the tire under a dynamic load to obtain a third test result. The implementation process may include, but is not limited to, steps S601 to S602, as follows: S601. Controlling the test bench to perform lateral translation of the drum according to the lateral displacement included in each composite parameter to apply lateral excitation to the tire, and to perform biaxial driving of the drum and the tire according to the longitudinal slip rate included in each composite parameter to apply longitudinal excitation to the tire. The lateral excitation and the longitudinal excitation constitute a composite excitation, and performing a radial force-lateral force-longitudinal force coupled test on the tire under dynamic load and high-speed conditions to obtain test data for the tire under each composite parameter. S602: Calculate according to the test data of the tire under several composite parameters to obtain a third test result.

[0041] In the embodiment of the present application, lateral excitation mainly affects the steering stability and sideslip characteristics of the tire, and longitudinal excitation mainly affects the acceleration performance and braking performance of the tire. By applying these two excitations to the tire at the same time and performing a high-speed uniformity test on the tire, the actual complex driving conditions can be more comprehensively simulated, and the dynamic response performance of the tire under the action of composite forces can be comprehensively evaluated, which helps testers to better understand the overall performance of the tire during high-speed rotation, and can avoid the vehicle using poor tires and affecting its handling stability.

[0042] In S602 of some embodiments, the test data of the tire under each composite parameter includes the third radial force, the second initial lateral force, the second lateral force, the second initial longitudinal force, and the second longitudinal force of the tire under each composite parameter, that is, the third radial force, the second initial lateral force, and the second lateral force of the tire under the lateral displacement included in each composite parameter, and the second initial longitudinal force and the second longitudinal force of the tire under the longitudinal slip included in each composite parameter. The second initial lateral force can be understood as the initial lateral force of the tire when the lateral displacement is initially loaded, the second lateral force can be understood as the lateral force of the tire after the lateral displacement is loaded and during the drum rotation process, the second initial longitudinal force can be understood as the initial longitudinal force of the tire when the longitudinal slip is initially loaded, and the second longitudinal force can be understood as the longitudinal force of the tire after the longitudinal slip is loaded and during the drum rotation process. Regarding the step of calculating and obtaining the third test result based on the test data of the tire under several composite parameters, its implementation process can be, but is not limited to, including steps S701 to S702, as follows: S701: Calculate, based on the third radial force, the second initial lateral force, the second lateral force, the second initial longitudinal force, and the second longitudinal force of the tire under the plurality of composite parameters, to obtain a third radial force change value, a second lateral force change value, and a second longitudinal force change value of the tire under the plurality of composite parameters; Specifically, a plurality of composite parameters are divided into a plurality of composite parameter sets, each composite parameter set containing a plurality of composite parameters that are not completely identical, i.e., the plurality of composite parameters contain a plurality of completely different lateral displacements and a plurality of completely identical longitudinal slip rates. For each composite parameter set, a lateral displacement is selected from the plurality of lateral displacements contained in the composite parameter set as a reference lateral displacement, and the third radial force of the tire under the plurality of lateral displacements contained in the composite parameter set is subtracted from the third radial force of the tire under the reference lateral displacement contained in the composite parameter set to obtain a change value of the third radial force of the tire under the plurality of lateral displacements contained in the composite parameter set; the second lateral force of the tire under the lateral displacement contained in each composite parameter is subtracted from the second initial lateral force to obtain a change value of the second lateral force of the tire under the lateral displacement contained in each composite parameter; and the second longitudinal force of the tire under the longitudinal slip rate contained in each composite parameter is subtracted from the second initial longitudinal force to obtain a change value of the second longitudinal force of the tire under the longitudinal slip rate contained in each composite parameter.

[0043] S702: Perform weighted calculation on the third radial force change value, the second lateral force change value, and the second longitudinal force change value of the tire under the plurality of composite parameters based on the preset third radial weight, the second lateral weight, and the second longitudinal weight to obtain a third test result. Specifically, for each composite parameter, which includes lateral displacement and longitudinal slip rate, the third radial force change value of the tire under the lateral displacement is divided by the design load to obtain a fifth quotient value, the second lateral force change value of the tire under the lateral displacement is divided by the second initial lateral force to obtain a sixth quotient value, the second longitudinal force change value of the tire under the longitudinal slip rate is divided by the second initial longitudinal force to obtain a seventh quotient value, the fifth quotient value is multiplied by the third radial weight, the sixth quotient value is multiplied by the second lateral weight, and the seventh quotient value is multiplied by the second longitudinal weight, and these three multiplication results are added together to obtain a third high-speed uniformity evaluation index value of the tire under the composite parameters; then the third high-speed uniformity evaluation index values ​​of the tire under several composite parameters are summarized to obtain a third test result. Among them, the third radial weight is used to characterize the proportion of the third radial force change value to the third high-speed uniformity evaluation index value, which is preferably set to 0.4; the second lateral weight is used to characterize the proportion of the second lateral force change value to the third high-speed uniformity evaluation index value, which is preferably set to 0.3; the second longitudinal weight is used to characterize the proportion of the second longitudinal force change value to the third high-speed uniformity evaluation index value, which is preferably set to 0.3.

[0044] In an embodiment of the present application, before executing the tire radial force-lateral force coupling test mentioned in S201 above, the tire radial force-longitudinal force coupling test mentioned in S401 above, and the tire radial force-lateral force-longitudinal force coupling test mentioned in S601 above, multiple test operating parameters should be set on the test bench, including test speed, test air pressure, dynamic load and radial force loading frequency; wherein, the test speed refers to the rotation speed of the tire during the test, the test air pressure refers to the internal inflation pressure value of the tire during the test and is preferably set to 230 kPa, the dynamic load refers to the vertical load that the tire bears during the test and is preferably set to ±10% of the design load, and the radial force loading frequency refers to the radial force fluctuation frequency of the tire during rotation and is preferably set to 1 Hz. In addition, a test speed set is set in advance, which may include 100 km / h, 110 km / h, 120 km / h, 130 km / h, 140 km / h and 150 km / h. The above three coupling tests of the tire can be performed based on any test speed included in the test speed set to study the uniformity performance of the tire at a specific speed. The above three coupling tests of the tire can also be performed based on each test speed included in the test speed set to study the uniformity performance of the tire when the speed changes. This application does not impose any limitation on this.

[0045] In the embodiment of the present application, the multiple lateral displacements mentioned in S101 above are preferably set to 0mm, 1mm, 2mm, 3mm and 4mm, and the lateral displacement of 0mm is used as the reference lateral displacement; the multiple longitudinal slip rates mentioned in S102 above are preferably set to -70%, -30%, 0%, 30% and 70%, and the longitudinal slip rate of 0% is used as the reference longitudinal slip rate.

[0046] In some embodiments, before executing the three tire high-speed uniformity dynamic tests proposed in S101 to S103 above, the test bench can be controlled to perform a preheating test on the tire, and its implementation method may include: when the tire and rim combination is installed on the test bench and the operating environment of the tire is ensured to be normal, the test bench is controlled to preheat the tire according to a preset initial test load, initial test speed and initial test duration to eliminate residual stress inside the tire; wherein the initial test load is preferably set to the design load, the initial test speed is preferably set to 120 km / h, and the initial test duration is preferably set to 20 minutes.

[0047] The embodiment of the present application provides a dynamic testing method for high-speed uniformity of tires under multi-axis excitation. By controlling a test bench with a rotating drum to apply different types of excitations to the tire and load dynamic loads according to different key parameters, the coupling effects of different types of excitations on the high-speed uniformity of the tire are taken into account during the test process. This can more comprehensively and reliably evaluate the high-speed uniformity performance of the tire under complex working conditions, thereby improving the applicability of the final test results under complex working conditions.

[0048] Please refer to Figure 2 , Figure 2 This is a schematic block diagram of the module composition of a device for dynamic testing of tire uniformity at high speed under multi-axis excitation provided in an embodiment of the present application. The device is used to implement the above-mentioned method for dynamic testing of tire uniformity at high speed under multi-axis excitation. The tire is mounted on a test bench with a rotating drum for testing. The device includes the following: The first module 801 is configured to control the test bench to apply lateral excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset lateral displacements to obtain a first test result; The second module 802 is configured to control the test bench to apply longitudinal excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of preset longitudinal slip rates to obtain a second test result; The third module 803 is configured to control the test bench to apply a composite excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of composite parameters, thereby obtaining a third test result; wherein the plurality of composite parameters are obtained by combining a plurality of lateral displacements and a plurality of longitudinal slip rates in pairs; The fourth module 804 is used to summarize the first test result, the second test result and the third test result to obtain the high-speed uniformity dynamic test result of the tire.

[0049] It can be understood that the contents of the above method embodiments are all applicable to the embodiments of the present device, the functions specifically implemented by the embodiments of the present device are the same as the functions specifically implemented by the above method embodiments, and the beneficial effects achieved by the embodiments of the present device are also the same as the beneficial effects achieved by the above method embodiments.

[0050] An embodiment of the present application further provides an electronic device comprising a memory and a processor. The memory stores a computer program, and the processor, when executing the computer program, implements the aforementioned method for dynamic high-speed tire uniformity testing under multi-axis excitation. The electronic device may include any intelligent terminal, such as a tablet computer or an in-vehicle computer.

[0051] It can be understood that the contents of the above method embodiments are all applicable to the embodiments of the present device, the functions specifically implemented by the embodiments of the present device are the same as the functions specifically implemented by the above method embodiments, and the beneficial effects achieved by the embodiments of the present device are also the same as the beneficial effects achieved by the above method embodiments.

[0052] See also Figure 3 , Figure 3 A schematic diagram illustrating the hardware structure of an electronic device according to another embodiment, the electronic device comprising: The processor 901 can be implemented as a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application. The memory 902 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 902 can store an operating system and other application programs. When the technical solutions provided in the embodiments of the present application are implemented through software or firmware, the relevant program code is stored in the memory 902 and is called by the processor 901 to execute the technical solutions provided in the embodiments of the present application. Input / output interface 903, used to implement information input and output; Communication interface 904, used to implement communication interaction between this device and other devices, which can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WiFi, Bluetooth, etc.); Bus 905 , which transmits information between various components of the device (e.g., processor 901 , memory 902 , input / output interface 903 , and communication interface 904 ); The processor 901 , the memory 902 , the input / output interface 903 and the communication interface 904 are connected to each other in communication within the device via a bus 905 .

[0053] An embodiment of the present application further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the computer program implements the above-mentioned high-speed tire uniformity dynamic testing method under multi-axis excitation.

[0054] It can be understood that the contents of the above method embodiments are all applicable to the present storage medium embodiment, the functions specifically implemented by the present storage medium embodiment are the same as the functions specifically implemented by the above method embodiments, and the beneficial effects achieved by the present storage medium embodiment are also the same as the beneficial effects achieved by the above method embodiments.

[0055] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0056] The embodiments described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0057] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0058] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0059] Those skilled in the art will appreciate that all or some of the steps, devices, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, or appropriate combinations thereof.

[0060] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence 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, device, product or equipment comprising 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 equipment.

[0061] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0063] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0064] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0065] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes multiple instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: various media that can store programs, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0066] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention should be within the scope of the present invention.

Claims

1. A dynamic testing method for high-speed uniformity of tires under multi-axis excitation, characterized in that: The tire is mounted on a test bench having a rotating drum, and the method comprises: controlling the test bench to apply lateral excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset lateral displacements to obtain a first test result; controlling the test bench to apply longitudinal excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset longitudinal slip rates to obtain a second test result; controlling the test bench to apply a composite excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of composite parameters, thereby obtaining a third test result; wherein the plurality of composite parameters are obtained by combining the plurality of lateral displacements and the plurality of longitudinal slip rates in pairs; The first test result, the second test result, and the third test result are summarized to obtain a high-speed uniformity dynamic test result of the tire.

2. The tire high-speed uniformity dynamic testing method under multi-axis excitation according to claim 1, characterized in that: According to the preset multiple lateral displacements, controlling the test bench to apply lateral excitation to the tire and performing a high-speed uniformity dynamic test, obtaining a first test result includes: controlling the test bench to perform lateral translation of the drum according to each lateral displacement, and performing a radial force-lateral force coupling test on the tire under dynamic load and high speed conditions, to obtain test data of the tire under each lateral displacement; The first test result is obtained by performing calculations based on the test data of the tire under the multiple lateral displacements.

3. The tire high-speed uniformity dynamic testing method under multi-axis excitation according to claim 2, characterized in that: The test data of the tire under each lateral displacement includes a first radial force, a first initial lateral force, and a first lateral force of the tire under each lateral displacement; and the first test result obtained by calculating based on the test data of the tire under the multiple lateral displacements includes: Calculating, based on the first radial force, the first initial lateral force, and the first lateral force of the tire under the multiple lateral displacements, a first radial force change value and a first lateral force change value of the tire under the multiple lateral displacements; According to a preset first radial weight and a first lateral weight, a weighted calculation is performed on the first radial force change value and the first lateral force change value of the tire under the multiple lateral displacements to obtain the first test result.

4. The tire high-speed uniformity dynamic testing method under multi-axis excitation according to claim 1, characterized in that: According to the preset multiple longitudinal slip rates, controlling the test bench to apply longitudinal excitation to the tire and performing a high-speed uniformity dynamic test, obtaining a second test result includes: controlling the test bench to perform dual-axis driving of the drum and the tire according to each longitudinal slip rate, and performing a radial force-longitudinal force coupling test on the tire under dynamic load and high-speed conditions to obtain test data of the tire at each longitudinal slip rate; The second test result is obtained by performing calculations based on the test data of the tire at the multiple longitudinal slip rates.

5. The tire high-speed uniformity dynamic testing method under multi-axis excitation according to claim 4, characterized in that: The test data of the tire at each longitudinal slip rate includes the second radial force, the first initial longitudinal force and the first longitudinal force of the tire at each longitudinal slip rate; The calculating, based on the test data of the tire at the plurality of longitudinal slip rates, to obtain the second test result includes: calculating, based on the second radial force, the first initial longitudinal force, and the first longitudinal force of the tire at the multiple longitudinal slip rates, a second radial force change value and a first longitudinal force change value of the tire at the multiple longitudinal slip rates; The second radial force change value and the first longitudinal force change value of the tire under the multiple longitudinal slip rates are weightedly calculated according to the preset second radial weight and the first longitudinal weight to obtain the second test result.

6. The tire high-speed uniformity dynamic testing method under multi-axis excitation according to claim 1, characterized in that: The third test result obtained by controlling the test bench to apply composite excitation to the tire and perform a high-speed uniformity dynamic test based on the plurality of composite parameters includes: Controlling the test bench to perform lateral translation of the drum according to the lateral displacement included in each of the composite parameters, and to perform dual-axis driving of the drum and the tire according to the longitudinal slip rate included in each of the composite parameters, and performing a radial force-lateral force-longitudinal force coupling test on the tire under dynamic load and high-speed conditions to obtain test data of the tire under each of the composite parameters; The third test result is obtained by performing calculations based on the test data of the tire under the plurality of composite parameters.

7. The tire high-speed uniformity dynamic testing method under multi-axis excitation according to claim 6, characterized in that: The test data of the tire under each of the composite parameters includes the third radial force, the second initial lateral force, the second lateral force, the second initial longitudinal force, and the second longitudinal force of the tire under each of the composite parameters; and the third test result obtained by calculating based on the test data of the tire under the plurality of composite parameters includes: calculating, based on the third radial force, the second initial lateral force, the second lateral force, the second initial longitudinal force, and the second longitudinal force of the tire under the plurality of composite parameters, a third radial force change value, a second lateral force change value, and a second longitudinal force change value of the tire under the plurality of composite parameters; According to the preset third radial weight, second lateral weight and second longitudinal weight, the third radial force change value, second lateral force change value and second longitudinal force change value of the tire under the several composite parameters are weightedly calculated to obtain the third test result.

8. The tire high-speed uniformity dynamic testing method under multi-axis excitation according to claim 1, characterized in that: The method further comprises: Before performing the high-speed uniformity dynamic test on the tire, the test bench is controlled to perform a preheating test on the tire.

9. A dynamic testing device for high-speed uniformity of tires under multi-axis excitation, characterized in that: The tire is mounted on a test bench with a rotating drum, the device comprising: a first module, configured to control the test bench to apply lateral excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset lateral displacements, thereby obtaining a first test result; a second module, configured to control the test bench to apply longitudinal excitation to the tire and perform a high-speed uniformity dynamic test according to a plurality of preset longitudinal slip rates, to obtain a second test result; a third module, configured to control the test bench to apply a composite excitation to the tire and perform a high-speed uniformity dynamic test based on a plurality of composite parameters, thereby obtaining a third test result; wherein the plurality of composite parameters are obtained by combining the plurality of lateral displacements and the plurality of longitudinal slip rates in pairs; The fourth module is used to summarize the first test result, the second test result and the third test result to obtain a high-speed uniformity dynamic test result of the tire.

10. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the high-speed tire uniformity dynamic testing method under multi-axis excitation according to any one of claims 1 to 8 when executing the computer program.

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