CN115452422B - Test method for tire rolling radius and load radius considering tread wear - Google Patents
Test method for tire rolling radius and load radius considering tread wear Download PDFInfo
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Abstract
The invention relates to a test method for a rolling radius and a load radius of a tire considering tread wear. The invention relates to the technical field of tests of tire rolling radius and load radius, wherein the level of load, the level of air pressure, the level of speed, the level of slip angle and the level of camber angle are set; setting each factor as a designated level according to the serial number, recording the height of the tire pattern, and testing the rolling radius and the load radius until the tests in all serial numbers are completed; and processing the rolling radius and load radius data obtained by the test by adopting a partial least squares regression method, and establishing respective regression models.
Description
Technical Field
The invention relates to the technical field of tests of tire rolling radius and load radius, in particular to a test method of tire rolling radius and load radius considering tread wear.
Background
The tyre is an indispensable part of vehicles such as automobiles, motorcycles and the like, airplanes, spacecrafts and the like, is the only part contacted with the road surface, and has the functions of bearing and moving.
Many important properties of automobiles are related to the mechanical properties of tires, and research on the mechanical properties of tires is the basis for analyzing the performance of vehicles. The development of tire mechanical properties has profoundly affected the development of advanced technologies such as ABS, ASR, VDC, 4WD, active suspension, semi-active suspension, autopilot, etc.
Tire dynamics cover test, simulation and application of three theories and technologies, and are main bottlenecks for autonomous development of technologies such as automobiles, airplanes and the like. The effective rolling radius (rolling radius) and the load radius of the tire are two important parameters and main dimensions of the tire, relate to the interchangeability of the tire and the matching of the tire and a vehicle, and have wide application in tire models, whole vehicle performance simulation and vehicle design.
The invention belongs to the technical field of automobile tire dynamics, and aims to efficiently measure the rolling radius and the load radius of a tire influenced by inflation pressure, load, speed, slip angle, camber angle and tread wear of the tire.
The conventional test method has large test amount and low efficiency, and the test method for systematically researching the influence of the tread wear is not shown. The invention provides a test method, which adopts a uniform design method to design a test scheme, fully utilizes the abrasion effect of a slip angle on a tread, does not need to adopt special equipment to polish the tread, and can obtain the tire rolling radius and load radius data which have wide coverage range and can reflect the multi-factor effect of the tread abrasion on the premise of reducing the test amount and improving the test efficiency.
The effective rolling radius (rolling radius) and the load radius of the tire are two important parameters and main dimensions of the tire, relate to the interchangeability of the tire and the matching of the tire and a vehicle, and have wide application in tire models, whole vehicle performance simulation and vehicle design.
The conventional test method has large test amount and low efficiency. The invention provides a test method, which adopts a uniform design method to design a test scheme, and can obtain tire rolling radius and load radius data which have wide coverage range and fully reflect the effects of all influence factors on the premise of reducing test quantity and improving test efficiency.
The rolling radius and the load radius are affected by various factors such as load, speed, air pressure, slip angle, camber angle, and tread wear. At present, the research on the rolling radius and the load radius generally only considers the influence of load, speed and air pressure, the influence of the slip angle and the camber angle is less, the research on the influence of tread wear is less, and the influence of systematic research on wear is not seen.
The Magic Formula model is the most widely used and well-accepted tire model in industry, and has an empirical Formula and test method for rolling radius and load radius, but the provided Formula does not include the influence of abrasion, and the test amount requirement is larger. Under the condition that the influence of the side deflection angle and the camber angle is not considered, tests under 3 loads, 3 air pressures and 5 speeds are required to be carried out, 45 test points are added, if the influence of the side force and the camber angle is considered, the side deflection angle scanning (-15 DEG) test under 6 test points is required to be added, and the test quantity is large.
To study the effect of tread wear on tire rolling radius and load radius, it is common practice to buff the tread using specialized equipment.
The invention provides a test method, which adopts a uniform design method to design a test scheme, fully utilizes the abrasion effect of the slip angle on the tread, does not need to adopt professional equipment to polish the tread, simplifies the test procedure, saves a great amount of time, and can obtain the tire rolling radius and load radius data which have wide coverage range and can reflect the multi-factor effect of tread abrasion on the premise of reducing test amount and improving test efficiency.
The current research on the rolling radius and the load radius generally only considers the influences of load, speed and air pressure, and the influences of the slip angle and the camber angle are less considered. The Magic Formula model is the tire model which is most widely applied in industry and has high accuracy recognition, and has an empirical Formula about rolling radius and load radius, but the test amount is required to be large. Under the condition that the influence of the side deflection angle and the camber angle is not considered, tests under 3 loads, 3 air pressures and 5 speeds are required to be carried out, 45 test points are added, if the influence of the side force and the camber angle is considered, the side deflection angle scanning (-15 DEG) test under 6 test points is required to be added, and the test quantity is large.
Patent document 1 (CN 201710170652.3) discloses a method and a system for accurately calculating the radius of a tire of a vehicle, which calculates the tire accuracy of long distance displacement by using the GPS of the vehicle and then updates the tire radius under predetermined conditions. The method is used for on-line estimation of the rolling radius on the vehicle, and is a test method for observing the influence of various factors on the rolling radius and the load radius on a rack.
Patent document 2 (CN 201880040420.9) discloses a tire dynamic load radius calculation device and a calculation method, in which a drum rotation angle derivation unit derives a rotation angle of a drum for one rotation of a tire based on a signal of a drum rotation sensor, and the tire dynamic load radius calculation unit calculates a dynamic load radius using the rotation angle derived by the drum rotation angle derivation unit. The method is a test method for observing the influence of various factors on the rolling radius and the load radius on the bench.
Patent document 3 (CN 201910284624.3) discloses a multi-model tire radius adaptive method and system considering the acceleration of the vehicle wheel. The method is used for on-line estimation of the rolling radius on the vehicle, and is a test method for observing the influence of various factors on the rolling radius and the load radius on a rack.
Disclosure of Invention
The invention provides a test method for the rolling radius and the load radius of a tire considering tread wear in order to overcome the defects of the prior art.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a test method for a tire rolling radius and a load radius considering tread wear, which provides the following technical scheme:
a method of testing a tire rolling radius and a load radius taking into account tread wear, comprising the steps of:
step 1: setting the load level, and taking 0.4, 0.6, 0.8, 1.0 and 1.2 times of rated load;
Step 2: the level of air pressure was set and the car tire was set as follows: 170. 200, 230, 260, 290kPa;
step 3: setting the level of speed, the car tire is set as follows: 20. 50, 80, 110, 140km/h;
Step 4: the level of the slip angle is set as follows: -8 °, -4 °, 0 °,4 °, 8 °;
step 5: the camber angle level is set as follows: -6 °, -3 °, 0 °,3 °, 6 °;
Step 6: setting each factor as a designated level according to the serial number, and recording the height of the tire pattern;
Step 7: testing the rolling radius and the load radius, and repeating the step 6 until the tests in all serial numbers are completed;
step 8: and (3) processing the test data obtained in the steps (6) and (7) by adopting a partial least squares regression method, and establishing a regression model.
Preferably, the step 8 specifically includes:
And (3) carrying out regression on the model parameters by using the output data of the step (7), wherein a regression model formula is expressed by the following formula:
Wherein, The estimated value of the rolling radius or the load radius is represented by b j, b hj, b jj, and x j, wherein b j is a primary regression coefficient, b hj is a primary quadratic interaction coefficient, b jj is a quadratic regression coefficient, and x j is the load, air pressure, speed, slip angle, camber angle and tread wear.
Preferably, when the tread wear amount is not considered, the regression model is expressed by the following formula:
preferably, the model parameters are regressed using a partial least squares regression method.
A test system for tire rolling radius and load radius taking into account tread wear, the system comprising:
The load level setting module sets the load level, and takes 0.4, 0.6, 0.8, 1.0 and 1.2 times of rated load;
The device comprises a pneumatic level setting module, wherein the pneumatic level setting module is used for setting the pneumatic level, and a car tire is set as follows: 170. 200, 230, 260, 290kPa;
The speed level setting module sets the speed level, and the car tire is set as follows: 20. 50, 80, 110, 140km/h;
The horizontal setting module of slip angle, the horizontal setting module of slip angle sets up the level of slip angle, sets up as follows: -8 °, -4 °,0 °,4 °,8 °;
The camber angle level setting module sets the camber angle level as follows: -6 °, -3 °,0 °,3 °,6 °;
the recording module is used for recording the tire pattern height;
The factor setting module is used for setting each factor as a designated level according to the level indicated by the serial number;
The test module tests the rolling radius and the load radius according to the sequence numbers, and tests in all the sequence numbers are completed;
And the regression model module is used for processing the rolling radius and load radius data obtained through the test by adopting a partial least squares regression method and establishing respective regression models.
Preferably, the regression model module adopts a partial least squares regression method to carry out regression on model parameters.
A computer readable storage medium having stored thereon a computer program for execution by a processor for performing a test method such as a tire rolling radius and a load radius that take into account tread wear.
A computer device comprising a memory storing a computer program and a processor implementing a test method for tire rolling radius and load radius taking into account tread wear when executing the computer program.
A vehicle, comprising: the tire rolling radius test device comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize a test method of the tire rolling radius and the load radius considering tread wear.
A vehicle with a test system considering the tire rolling radius and the load radius of tread wear is provided, when a vehicle passenger brings a vehicle key close to the vehicle, when a vehicle-mounted computer detects a signal of the vehicle key, whether a distance signal between the vehicle and the vehicle key is in a preset threshold range is judged, and if the distance signal is in the preset threshold range, the test system considering the tire rolling radius and the load radius of tread wear is started.
The invention has the following beneficial effects:
The invention comprises the specific combination of 5 factors such as the inflation pressure, load, speed, slip angle, camber angle and the like of the tyre required when the tyre rolling radius and the load radius are tested, the obtained data can examine the influence of the 5 factors and abrasion on the rolling radius and the load radius, and only 30 test points are required.
The method is divided into 2 parts: 1. and setting the inflation pressure, load, speed, slip angle, camber angle and other 5 factors of the tire horizontally. 2. Tests were performed at a specific combination of 5 factor levels according to the method requirements, and regression was performed according to a given model formula.
The test method adopts a uniform design method to design a test scheme, reduces test workload and improves test working efficiency.
The abrasion effect of the slip angle on the tread is fully utilized, no special equipment is needed for polishing the tread, the test procedure is simplified, a large amount of time is saved, and the test efficiency is improved.
The rolling radius and load radius model taking 6 factors such as load, air pressure, speed, slip angle, camber angle and tread abrasion into consideration is provided, and the rolling radius and load radius regression model taking 5 factors such as load, air pressure, speed, slip angle and camber angle into consideration is provided.
Protection point: test methods for tire rolling radius and load radius taking into account wear; and (3) a rolling radius and load radius regression model of 6 factors such as load, air pressure, speed, slip angle, camber angle and tread wear is considered, and a rolling radius and load radius regression model of 5 factors such as load, air pressure, speed, slip angle and camber angle is considered.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a test method for tire rolling radius and load radius that accounts for tread wear.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The present invention will be described in detail with reference to specific examples.
First embodiment:
According to the embodiment shown in fig. 1, the specific optimization technical scheme adopted by the invention for solving the technical problems is as follows: the present invention relates to a method for testing a tire rolling radius and a load radius in consideration of tread wear.
A method of testing a tire rolling radius and a load radius taking into account tread wear, comprising the steps of:
step 1: the load levels were set as shown in table 1, and 0.4, 0.6, 0.8, 1.0, and 1.2 times the rated load were taken;
Step 2: the car tires were set as follows according to the set air pressure levels shown in table 1: 170. 200, 230, 260, 290kPa;
Step 3: according to the set speed levels shown in table 1, the car tires were set as follows: 20. 50, 80, 110, 140km/h;
Step 4: the level of the slip angle was set as shown in table 1, as follows: -8 °, -4 °, 0 °,4 °, 8 °;
step 5: the camber angle level was set as shown in table 1 as follows: -6 °, -3 °, 0 °,3 °, 6 °;
Step 6: setting each factor to a specified level according to the serial numbers shown in table 2, and recording the tire pattern height;
Step 7: testing the rolling radius and the load radius, and repeating the step 6 until the tests in all serial numbers are completed;
step 8: and processing the rolling radius and load radius data obtained by the test by adopting a partial least squares regression method, and establishing respective regression models.
Table 1 five factor level table
Table 2 test protocol
Note that: the rows/columns in the table are interchangeable and do not affect the implementation of the scheme.
Specific embodiment II:
the second embodiment of the present application differs from the first embodiment only in that:
The step 8 specifically comprises the following steps:
And (3) carrying out regression on the model parameters by using the output data of the step (7), wherein a regression model formula is expressed by the following formula:
Wherein, The estimated value of the rolling radius or the load radius is represented by b j, b hj, b jj, and x j, wherein b j is a primary regression coefficient, b hj is a primary quadratic interaction coefficient, b jj is a quadratic regression coefficient, and x j is the load, air pressure, speed, slip angle, camber angle and tread wear.
Third embodiment:
The difference between the third embodiment and the second embodiment of the present application is that:
When the tread wear amount is not considered, the regression model is represented by the following formula:
fourth embodiment:
The fourth embodiment of the present application differs from the third embodiment only in that:
And regression is carried out on the model parameters by adopting a partial least squares regression method.
The uniform design is a test design method based on the fact that test points are uniformly distributed in the whole test range, and the test design method is proposed from the aspect of uniformity. The method is an application of a pseudo Monte Carlo method in the number theory method, and is created by two mathematicians of Kaitai and Wang Yuan in 1978.
All experimental design methods are essentially methods that give a choice of representative points within the scope of the experiment, as does uniform designs. The method can select part of representative test points from the comprehensive test points, and the test points are fully and uniformly dispersed in the test range and can still reflect the main characteristics of the system. For example, an orthogonal design is to choose a representative point based on orthogonality, which has two characteristics in choosing the representative point: uniformly dispersed, neat and comparable. The test points are uniformly distributed in the test range, and each test point is sufficiently representative, so that satisfactory results can be obtained even when all columns in the orthogonal table are full; the 'neatness and comparability' makes analysis of test results very convenient, and main effects and partial interaction effects of all factors are easy to estimate, so that the influence of all factors on indexes and the change rule of the indexes can be analyzed. However, in order to take care of "clean and comparable", the test points of orthogonal design are not sufficiently "uniformly dispersed", but in order to achieve "clean and comparable", the number of test points is relatively large.
The uniform design only considers that the test points are uniformly dispersed in the test range, the starting point of selecting the test representative points is 'uniform dispersion', and 'tidy comparability' is not considered, so that the test points can be ensured to have uniformly distributed statistical characteristics, each level of each factor can be subjected to one test and only one test, the test points of any two factors are on the grid points of the plane, and each row has one and only one test point. It focuses on the uniform spreading of test points in the test range to obtain the most information by the least tests, so that the number of tests is obviously reduced compared with that of orthogonal designs, and the uniform design is particularly suitable for multi-factor and multi-level tests and the situation that the system model is completely unknown. For example, when there are m factors in the test, each factor has n levels, if a comprehensive test is performed, there are n m combinations, the orthogonal design is to select n 2 tests from the combinations, and the uniform design is to select n point tests by using the uniform distribution theory in the number theory, and the number theory method is applied to make the test points spread quite uniformly in the integral range, and make the distribution points sufficiently close to various values of the integral function, so that the computer statistical modeling is facilitated. If the number of the influence factors of a certain test is 5 and the number of the levels is 10, the total test times are 10 5, namely, one hundred thousand tests are performed; the orthogonal design is carried out for 10 2 times, namely 100 times of tests are carried out; the uniform design is only carried out 10 times, and the superiority is obvious.
Fifth embodiment:
the fifth embodiment of the present application differs from the fourth embodiment only in that:
the present invention provides a test system for tire rolling radius and load radius taking into account tread wear, the system comprising:
The load level setting module sets the load level, and takes 0.4, 0.6, 0.8, 1.0 and 1.2 times of rated load;
The device comprises a pneumatic level setting module, wherein the pneumatic level setting module is used for setting the pneumatic level, and a car tire is set as follows: 170. 200, 230, 260, 290kPa;
The speed level setting module sets the speed level, and the car tire is set as follows: 20. 50, 80, 110, 140km/h;
The horizontal setting module of slip angle, the horizontal setting module of slip angle sets up the level of slip angle, sets up as follows: -8 °, -4 °,0 °,4 °,8 °;
The camber angle level setting module sets the camber angle level as follows: -6 °, -3 °,0 °,3 °,6 °;
the recording module is used for recording the tire pattern height;
The factor setting module is used for setting each factor as a designated level according to the level indicated by the serial number;
The test module tests the rolling radius and the load radius according to the sequence numbers, and tests in all the sequence numbers are completed;
And the regression model module is used for processing the rolling radius and load radius data obtained through the test by adopting a partial least squares regression method and establishing respective regression models.
Specific embodiment six:
the difference between the sixth embodiment and the fifth embodiment of the present application is that:
The regression model module adopts a partial least squares regression method to carry out regression on model parameters.
Specific embodiment seven:
the seventh embodiment of the present application differs from the sixth embodiment only in that:
the present invention provides a computer-readable storage medium having stored thereon a computer program for execution by a processor for implementing a test method for tire rolling radius and load radius taking tread wear into account.
Specific embodiment eight:
The eighth embodiment of the present application differs from the seventh embodiment only in that:
The invention provides a computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing a test method for a rolling radius and a load radius of a tire taking into account tread wear when executing the computer program.
Specific embodiment nine:
the difference between the embodiment nine and the embodiment eight of the present application is that:
The present invention provides a vehicle including: the tire rolling radius test device comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize a tire rolling radius test method considering tread wear and a tire loading radius test method.
Specific embodiment ten:
the tenth embodiment of the present application differs from the ninth embodiment only in that:
The invention provides a vehicle with a test system for the tire rolling radius and the load radius considering the tread wear, which is characterized in that when a vehicle passenger brings a vehicle key close to the vehicle, when a vehicle-mounted computer detects a signal of the vehicle key, whether a distance signal between the vehicle and the vehicle key is in a preset threshold range is judged, and if the distance signal is in the preset threshold range, the test system for the tire rolling radius and the load radius considering the tread wear is started.
The controller of the display device in the invention can be a part of a vehicle-mounted computer system in a vehicle or can be independent from the vehicle-mounted computer and connected to the vehicle-mounted computer to share partial functions, such as positioning equipment, communication equipment, a man-machine interface and the like, and can communicate with the vehicle-mounted component and the auxiliary component through a vehicle-mounted network, so that the vehicle can realize distance identification on certain specific vehicle accessories, such as a vehicle key. When the vehicle recognizes that the vehicle key carried by the vehicle occupant is in the preset distance signal threshold interval, the vehicle-mounted computer can control the logo display device to start the display equipment, namely the laser, so that the logo pattern display effect is realized.
The above description is only a preferred embodiment of a method for testing the rolling radius and the load radius of a tire in consideration of tread wear, and the scope of protection of a method for testing the rolling radius and the load radius of a tire in consideration of tread wear is not limited to the above examples, and all technical solutions under this concept belong to the scope of protection of the present invention. It should be noted that modifications and variations can be made by those skilled in the art without departing from the principles of the present invention, which is also considered to be within the scope of the present invention.
Claims (10)
1. A test method for considering the rolling radius and the load radius of a tire with tread wear is characterized by comprising the following steps: the method comprises the following steps:
step 1: setting the load level, and taking 0.4, 0.6, 0.8, 1.0 and 1.2 times of rated load;
Step 2: the level of air pressure was set and the car tire was set as follows: 170. 200, 230, 260, 290kPa;
step 3: setting the level of speed, the car tire is set as follows: 20. 50, 80, 110, 140km/h;
Step 4: the level of the slip angle is set as follows: -8 °, -4 °, 0 °,4 °, 8 °;
step 5: the camber angle level is set as follows: -6 °, -3 °, 0 °,3 °, 6 °;
Step 6: setting each factor as a designated level according to the serial number, and recording the height of the tire pattern;
step 7: testing the rolling radius and the load radius, and repeating the step 6 until the tests in all serial numbers are completed;
step 8: and (3) processing the test data obtained in the steps (6) and (7) by adopting a partial least squares regression method, and establishing a regression model.
2. A test method for tire rolling radius and load radius taking into account tread wear as in claim 1, wherein: the step 8 specifically comprises the following steps:
And (3) carrying out regression on the model parameters by using the output data of the step (7), wherein a regression model formula is expressed by the following formula:
Wherein, The estimated value of the rolling radius or the load radius is represented by b j, b hj, b jj, and x j, wherein b j is a primary regression coefficient, b hj is a primary quadratic interaction coefficient, b jj is a quadratic regression coefficient, and x j is the load, air pressure, speed, slip angle, camber angle and tread wear.
3. A test method for tire rolling radius and load radius taking into account tread wear as in claim 2, wherein:
When the tread wear amount is not considered, the regression model is represented by the following formula:
4. a test method for tire rolling radius and load radius taking into account tread wear as in claim 3, wherein: and regression is carried out on model parameters by adopting a partial least squares regression method.
5. A test system for tire rolling radius and load radius taking tread wear into account, characterized by: the system comprises:
The load level setting module sets the load level, and takes 0.4, 0.6, 0.8, 1.0 and 1.2 times of rated load;
The device comprises a pneumatic level setting module, wherein the pneumatic level setting module is used for setting the pneumatic level, and a car tire is set as follows: 170. 200, 230, 260, 290kPa;
The speed level setting module sets the speed level, and the car tire is set as follows: 20. 50, 80, 110, 140km/h;
The horizontal setting module of slip angle, the horizontal setting module of slip angle sets up the level of slip angle, sets up as follows: -8 °, -4 °,0 °,4 °,8 °;
The camber angle level setting module sets the camber angle level as follows: -6 °, -3 °,0 °,3 °,6 °;
the recording module is used for recording the tire pattern height;
The factor setting module is used for setting each factor as a designated level according to the level indicated by the serial number;
The test module tests the rolling radius and the load radius according to the sequence numbers, and tests in all the sequence numbers are completed;
And the regression model module is used for processing the rolling radius and load radius data obtained through the test by adopting a partial least squares regression method and establishing respective regression models.
6. A tire rolling radius and load radius test system taking into account tread wear as in claim 5, wherein: the regression model module adopts a partial least squares regression method to carry out regression on model parameters.
7. A computer-readable storage medium having stored thereon a computer program, the program being executed by a processor for implementing a test method of a tire rolling radius and a load radius taking into account tread wear as claimed in any one of claims 1 to 4.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized by: the processor, when executing the computer program, implements a test method for tire rolling radius and load radius taking into account tread wear as claimed in any one of claims 1-4.
9. A vehicle, characterized by comprising: a memory, a processor and a computer program stored on said memory and executable on said processor, said processor executing said program to perform a method of testing a rolling radius and a load radius of a tire taking into account tread wear as claimed in any one of claims 1 to 4.
10. A vehicle with a test system considering the tire rolling radius and the load radius of tread wear is characterized in that when a vehicle passenger brings a vehicle key close to the vehicle, when a vehicle-mounted computer detects a signal of the vehicle key, whether a distance signal between the vehicle and the vehicle key is in a preset threshold range or not is judged, and if the distance signal is in the preset threshold range, the test system considering the tire rolling radius and the load radius of tread wear is started.
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