CN115235796A - Unbalanced mass tolerance value test system for shimmy of vehicle steering wheel - Google Patents

Abstract

The invention discloses an unbalanced mass tolerance value testing system for the vibration of a steering wheel of a vehicle. Including: a controller, a steering wheel acceleration sensor connected to the controller; a steering wheel acceleration sensor, which is used to test the steering wheel for each mass block in a test cycle when different numerical mass blocks are pasted at a designated position of one front wheel of the vehicle. acceleration, and transmit the acceleration of the steering wheel to the controller; the controller is used to obtain the minimum value mass corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to the preset threshold, and use the minimum value mass as the corresponding value of the steering wheel vibration of the vehicle Unbalanced mass tolerance value. By sticking mass blocks at the designated position of the wheel, the tolerance value of the steering wheel sway to the unbalanced mass of the wheel can be measured, which can be used as the robustness evaluation index of the vehicle steering wheel sway and provide the basis for the subsequent optimization design and evaluation of the vehicle steering wheel sway.

Description

An Unbalanced Mass Tolerance Test System for Vehicle Steering Wheel Vibration

technical field

The invention relates to the technical field of vehicle testing, in particular to an unbalanced mass tolerance value testing system for steering wheel vibration of a vehicle.

Background technique

Steering wheel sway of a vehicle means that the vehicle is driving in a straight line on a flat road, and the steering wheel has perceptible circumferential vibration. When the steering wheel is released, the steering wheel circumferential vibration can be seen. The requirements are constantly increasing, and the attention to vibration problems such as steering wheel sway is gradually increasing.

At present, the research direction of steering wheel sway mainly focuses on how to identify or evaluate steering wheel sway when vehicle sway occurs, and how to reduce steering wheel sway according to the identification or evaluation results.

However, the research direction of steering wheel sway in the prior art is relatively single, mainly aimed at vehicles that have experienced steering wheel sway, and the robustness evaluation of steering wheel sway in normal vehicles is also an urgent problem to be studied.

SUMMARY OF THE INVENTION

The invention provides an unbalanced mass tolerance value testing system for steering wheel vibration of a vehicle, so as to solve the test and evaluation of the unbalanced quality of the wheel edge caused by the steering wheel vibration.

According to an aspect of the present invention, there is provided an unbalanced mass tolerance value testing system for steering wheel vibration of a vehicle, comprising: a controller, and a steering wheel acceleration sensor connected to the controller;

The steering wheel acceleration sensor is used to test the steering wheel acceleration of the steering wheel for each mass block in a test cycle when the different numerical mass blocks are pasted at a designated position of a front wheel of the vehicle, and transmit the steering wheel acceleration to the controller, wherein the test The period includes from vehicle start to specified driving speed;

The controller is used to obtain the maximum steering wheel circumferential vibration acceleration for each mass block in the test cycle according to the steering wheel acceleration, and obtain the minimum value mass block corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to a preset threshold, and set the minimum The numerical mass is used as the unbalanced mass tolerance value corresponding to the vibration of the steering wheel of the vehicle.

According to another aspect of the present invention, a method for testing the unbalanced mass tolerance value for steering wheel vibration of a vehicle is provided, comprising:

When different numerical mass blocks are pasted at a designated position of a front wheel of the vehicle through the steering wheel acceleration sensor, the steering wheel acceleration of the steering wheel for each mass block in a test cycle is respectively tested, and the steering wheel acceleration is transmitted to the controller. The test cycle includes From the start of the vehicle to the specified driving speed;

Obtain the maximum steering wheel circumferential vibration acceleration for each mass block in the test cycle through the controller according to the steering wheel acceleration, and obtain the minimum numerical mass block corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to the preset threshold, and use the minimum numerical mass The block is used as the unbalanced mass tolerance value corresponding to the vibration of the steering wheel of the vehicle.

According to the technical solution of the embodiment of the present invention, the mass tolerance value of the steering wheel vibration to the wheel side unbalance can be measured by sticking mass blocks at the designated position of the wheel, which is used as the robustness evaluation index of the steering wheel vibration of the vehicle, and is used for the subsequent steering wheel vibration of the vehicle. Provide a basis for optimizing design and evaluation work.

It should be understood that the content described in this section is not intended to identify key or critical features of the embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become readily understood from the following description.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of an unbalanced mass tolerance value testing system for steering wheel vibration of a vehicle provided according to Embodiment 1 of the present invention;

2 is a schematic diagram of the arrangement of a steering wheel acceleration sensor provided according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of another unbalanced mass tolerance value testing system for steering wheel vibration of a vehicle provided according to Embodiment 2 of the present invention;

4 is a flowchart of a method for testing an unbalanced mass tolerance value for steering wheel vibration of a vehicle provided according to Embodiment 3 of the present invention;

FIG. 5 is a flowchart of a method for testing an unbalanced mass tolerance value for steering wheel vibration of a vehicle according to Embodiment 4 of the present invention.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Example 1

FIG. 1 is a schematic structural diagram of an unbalanced mass tolerance value testing system for steering wheel vibration of a vehicle according to Embodiment 1 of the present invention. The system includes a controller 110 and a steering wheel acceleration sensor 120 connected to the controller.

Among them, the steering wheel acceleration sensor 120 is used to test the steering wheel acceleration of the steering wheel for each mass block in a test cycle when the different numerical mass blocks are pasted at a designated position of a front wheel of the vehicle, and transmit the steering wheel acceleration to the controller 110. , wherein the test period includes the time from the vehicle startup to the specified driving speed; the controller 110 is configured to obtain the maximum steering wheel circumferential vibration acceleration for each mass block in the test period according to the steering wheel acceleration, and obtain the maximum steering wheel circumferential vibration acceleration greater than It is equal to the minimum numerical mass block corresponding to the preset threshold, and the minimum numerical mass block is used as the unbalanced mass tolerance value corresponding to the vibration of the steering wheel of the vehicle.

Specifically, a steering wheel acceleration sensor is an electronic device that can measure acceleration force, and can be divided into piezoelectric acceleration sensors, piezoresistive acceleration sensors, capacitive acceleration sensors, and servo acceleration sensors. In this embodiment, the steering wheel acceleration sensor is not used. The specific type of the sensor is limited, as long as it is a sensor that can measure the acceleration of the steering wheel, it is within the scope of protection of the present application. The designated position of the wheel can be the rim of the front left or right front wheel of the vehicle. The rim refers to the outermost circle of the metal part of the vehicle wheel. The mass block can be pasted on the rim of the left front wheel or the rim of the right front wheel. In this embodiment, the mass block is not pasted. The position of the mass block is limited, and the mass block is pasted on other wheel side rotating parts, or is pasted on the inner surface of the left front and right front rims at the same time within the scope of protection of this application; mass blocks with different values refer to the value of the mass block as a variable, by changing the mass The value of the block is used to simulate the unbalance of the wheel edge. For example, starting from 0g and increasing the weight of the mass block in units of 10g, test the corresponding acceleration of the steering wheel under different weights; the specified driving speed can be the maximum driving speed of the vehicle, The test process of a mass block is a test condition, and a test condition is to repeat the test three times for the process of the vehicle starting and gradually accelerating to the maximum speed, and the test period corresponding to each test is specifically from the vehicle start to gradually accelerate to the maximum speed. The purpose of testing three times in the process of the highest driving speed is to obtain the average value of multiple measurements to ensure the accuracy of the test results.

Exemplarily, the weight of the mass block is increased in units of 10g from 0g. Taking the weight of the mass block as 10g as an example, it is concentrated on the inner surface of the left front rim of the vehicle, and the steering wheel acceleration sensor 120 measures three times respectively and gradually accelerates from the start of the vehicle. The steering wheel acceleration corresponding to the mass block with a weight of 10 g in the process of reaching the maximum driving speed, and then the average of the three measurement results is transmitted to the controller 110 as the steering wheel acceleration. The controller 110 calculates the corresponding 10 g mass block according to the received steering wheel acceleration. The maximum steering wheel circumferential vibration acceleration is less than the preset threshold value, indicating that the steering wheel has not yet vibrated. At this time, the user can continue to increase the mass block by 10g to measure again, and repeat the above every time the weight of the mass block is increased. During the test process, obtain the minimum numerical mass corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to a preset threshold; wherein, the preset threshold is manually set according to the maximum steering wheel sway acceleration allowed during the sway test of the vehicle. If the steering wheel acceleration sensor 120 detects that the circumferential acceleration of the steering wheel is greater than or equal to the preset acceleration threshold, it can be determined that the steering wheel is in a swaying state; if the steering wheel acceleration sensor 120 detects that the circumferential acceleration of the steering wheel is less than the preset acceleration threshold, it can be determined that the steering wheel is not in a state of vibration Swing state; when the minimum value mass corresponding to the maximum steering wheel circumferential vibration acceleration is greater than or equal to the preset threshold, the minimum value mass can be used as the unbalanced mass tolerance value corresponding to the vehicle steering wheel swing.

Preferably, the system further includes a vehicle speed sensor 130 connected to the controller 110 ; it is used to acquire the corresponding vehicle target running speed when the steering wheel circumferential vibration acceleration is at a maximum, and transmit the vehicle target running speed to the controller 110 .

Specifically, the vehicle speed sensor 130 is obtained by directly or indirectly detecting the driving speed of the vehicle; the vehicle speed sensor 130 can be arranged on the vehicle body and connected to the controller, and the type and setting position of the vehicle speed sensor 130 are not limited in this embodiment; In a test condition, the steering wheel acceleration is constantly changing during the acceleration of the vehicle, and the corresponding steering wheel circumferential vibration acceleration obtained according to the steering wheel acceleration is also constantly changing. In this embodiment, each working condition is screened out. Since the controller obtains the vehicle speed sent by the vehicle speed sensor in real time, the vehicle speed corresponding to the maximum steering wheel circumferential vibration acceleration under each working condition can be determined.

Preferably, the steering wheel acceleration sensor 120 includes a first steering wheel acceleration sensor 121 located at a first position of the steering wheel and a second steering wheel acceleration sensor 122 located at a second position of the steering wheel, wherein the first steering wheel acceleration sensor 121 and the second steering wheel acceleration sensor 122 is arranged on the steering wheel rim and is arranged at 90° in the steering wheel plane with the axis of rotation of the steering wheel as the center.

Fig. 2 is a schematic diagram of the layout of the steering wheel acceleration sensor, wherein the position a is the 12 o'clock position of the steering wheel rim, that is, the position a is the first position, and the first steering wheel acceleration sensor 121 is set at the position a; the position b is the 3 o'clock position of the steering wheel rim , that is, the position b is taken as the second position, the second steering wheel acceleration sensor 122 is set at the position b, and the position a and the position b are at 90° in the steering wheel plane with the rotation axis of the steering wheel as the center, that is, the two steering wheel acceleration sensors are perpendicular to each other. In the embodiment, only the arrangement of the steering wheel acceleration sensor at the 12 o'clock and 3 positions of the steering wheel is used as an example, and other position arrangements of the steering wheel acceleration sensor can also be used, such as the 12 o'clock and 9 o'clock positions, the 6 o'clock and 3 o'clock positions, and the 6 o'clock position. and the 9 o'clock position, in this embodiment, the first position where the acceleration of the first steering wheel is located and the second position where the second steering wheel is located are not specifically limited, as long as the positions of the first steering wheel acceleration sensor 121 and the second steering wheel acceleration sensor 122 are mutually Vertically, they are all within the scope of protection of the present application.

Preferably, the first steering wheel acceleration sensor 121 is used to test the first steering wheel acceleration for each mass block at the first position of the steering wheel, and transmit the first steering wheel acceleration to the controller; the second steering wheel acceleration sensor 122 is used to The second steering wheel acceleration is tested for each mass at the second position of the steering wheel, and the second steering wheel acceleration is communicated to the controller.

Specifically, the first steering wheel acceleration sensor 121 and the second steering wheel acceleration sensor 122 are both connected to the controller 110, and both transmit the steering wheel accelerations corresponding to the measurement of pasting different numerical mass blocks to the controller 110, which are respectively denoted as the first steering wheel acceleration and the second steering wheel acceleration; for example, taking the weight of the mass sticking on the inner surface of the left front rim of the vehicle is 10g as an example, the first steering wheel acceleration sensor 121 located at the steering wheel position a will measure the first wheel corresponding to the sticking 10g mass The steering wheel acceleration A is transmitted to the controller 110 , and the second steering wheel acceleration sensor 122 located at the steering wheel position b will measure the second steering wheel acceleration B corresponding to the pasted 10 g mass and transmit it to the controller 110 .

Preferably, the controller 110 is configured to acquire, according to the first steering wheel acceleration and the second steering wheel acceleration, the maximum steering wheel circumferential vibration acceleration for each mass block in the test period.

Specifically, the controller 110 calculates the maximum steering wheel circumferential vibration acceleration of each mass block according to the first steering wheel acceleration and the second steering wheel acceleration, in order to calculate the steering wheel circumferential vibration acceleration for cross-validation. As shown in FIG. 2 , the acceleration A is along the The component of the tangent to the steering wheel is Ay, the component of the tangent a to the center of the steering wheel is Ax, the component of the acceleration B along the tangent of the steering wheel is Bx, and the component of the tangent b to the opposite direction of the center of the steering wheel is By. Taking the position a where the first steering wheel acceleration sensor is located as an example, the component Ay along the tangent of the steering wheel at position a includes not only the vibration acceleration in the circumferential direction of the steering wheel, but also the translational acceleration in the steering wheel plane. It is easy to misjudge a part of the translational acceleration as the circumferential vibration acceleration; for example, when the steering wheel generates circumferential vibration (that is, sway vibration) and translational vibration along the lateral direction of the vehicle at the same time, the position a is along the The component Ay on the tangent of the steering wheel will superimpose two components of circumferential vibration and translational vibration. If this signal is directly collected, translational vibration acceleration will be superimposed, resulting in misjudgment of sway vibration. However, the component By at position b pointing in the opposite direction of the steering wheel center only contains translational acceleration, so subtracting By from Ay can exclude the translational vibration of the steering wheel along the lateral direction of the vehicle, and only retain the circumferential vibration acceleration of the steering wheel; The component Bx along the tangent of the steering wheel minus the component Ax in the direction of the center of the steering wheel at position a can also exclude the translational vibration of the steering wheel along the longitudinal direction of the steering wheel plane, only retain the circumferential vibration acceleration of the steering wheel, and then obtain the steering wheel accurately by taking the average of the two. Circumferential vibration acceleration; through cross-validation, the superposition of the steering wheel translational acceleration on the circumferential vibration acceleration can be excluded, so as to avoid vibrations in other directions in the steering wheel plane, such as lateral and longitudinal directions, from being misjudged as circumferential vibration; position a along the steering wheel The component Ay on the tangent line minus the component By at the position b that points to the opposite direction of the steering wheel center is recorded as y, that is, y=Ay-By, and the component Bx at the steering wheel position b along the tangent line of the steering wheel minus the component B at the position a that points to the center of the steering wheel. The component Ax is recorded as x, that is, x=Bx-Ax, and the average value M of y and x is used as the steering wheel circumferential vibration acceleration, that is, M=(y+x)/2; the maximum steering wheel circumferential vibration acceleration can also be obtained by other methods. Obtain, such as using steering wheel circumferential vibration angular acceleration sensor measurement.

According to the technical solution of the embodiment of the present invention, the mass tolerance value of the steering wheel sway to the wheel side unbalance can be measured by sticking mass blocks at the designated position of the wheel, which can be used as an evaluation index of the robustness of the steering wheel sway of a normal vehicle, and can be used for subsequent vehicles. Provide the basis for the optimal design and evaluation of steering wheel sway.

Embodiment 2

3 is a schematic structural diagram of an unbalanced mass tolerance value testing system for steering wheel vibration of a vehicle according to Embodiment 2 of the present invention. This embodiment adds a display device 140 and a storage device 150 on the basis of Embodiment 1 above.

Preferably, the system further includes a display device 140 connected to the controller 110; the controller 110 is used to transmit the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value to the display device 140; the display device 140, It is used to display the maximum steering wheel circumferential vibration acceleration, vehicle target speed and unbalanced mass tolerance value.

Specifically, the controller 110 and the display device 140 are connected through a bus, and when the controller 110 obtains the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value, it is transmitted to the display device 140, and the display device 140 may be a liquid crystal display It is convenient for users to know the relevant parameter information when the vehicle steering wheel vibrates in time. The user refers to the technical personnel or related staff who design the vehicle. The user can know the maximum steering wheel circumferential vibration acceleration, the vehicle target speed and the unbalanced mass tolerance by knowing the maximum steering wheel vibration acceleration. It can be used as an evaluation index for evaluating the tolerance of the steering wheel sway vibration to the vibration excitation of the unbalanced mass at the wheel side and the evaluation index of the design robustness, and then provide a basis for the optimal design and evaluation of the steering wheel sway vibration. For example, when the unbalance tolerance value is 50g, When sway vibration occurs, the user can view through the display device 140 that the maximum steering wheel circumferential vibration acceleration is 3 m/s ² , and the corresponding vehicle speed is 30 m/s.

Preferably, the system further includes a storage device 150 connected to the controller; the controller 110 is used to transmit the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value to the storage device 150; the storage device 150 is used for It is used to store the maximum steering wheel circumferential vibration acceleration, vehicle target driving speed and unbalanced mass tolerance value.

Specifically, the controller 110 and the storage device 150 are connected through a bus, and the storage device 150 refers to a device for storing information, which can be a portable computer disk, a hard disk, a random access memory (RAM), a read only memory (ROM), an erasable computer programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above; when the controller 110 obtains the maximum steering wheel circumference The vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value are transmitted to the storage device 150 for storage as historical information.

Further, the purpose of storage is to facilitate the user to read when needed later; for example, the user can input a read data instruction through the display device 140, and the data instruction includes the specified data content and the specified time range that the user wants to read, wherein , the specified data content can be read by the user selecting one or more of the steering wheel circumferential vibration acceleration, vehicle target driving speed and unbalanced mass tolerance value, the specified time range can be set by the user as needed, and the input method can be The input is performed by touching the virtual keys on the display device 140. When the user touches the virtual key for reading data and inputs a read data command, the display device 140 will send the read data command to the controller, and the controller 110 receives the read data command. The data fetch instruction will read the information of the corresponding data content and time range in the storage device 150, and then feed back the information of the corresponding data content and time range to the display device 140 for display to the user; for example, the user wants to view May 2022 The unbalanced mass tolerance value measured in May, after inputting the read data command through the display device 140, the controller 110 will read the historical information of the unbalanced mass tolerance value measured in May 2022 in the storage device 150 after receiving the read data command , and feed it back to the display device 140 for display to the user, and the user can view it through the display device 140 at this time.

According to the technical solution of the embodiment of the present invention, the mass tolerance value of the steering wheel vibration to the unbalanced mass of the wheel side can be measured by sticking the mass blocks at the designated position of the wheel, and the obtained value can be displayed to the user through the display device, and at the same time through the storage device. It is stored as the robustness evaluation index of the vehicle steering wheel sway, and provides a basis for the subsequent optimization design and evaluation of the vehicle steering wheel sway.

Embodiment 3

4 is a flowchart of a method for testing an unbalanced mass tolerance value for steering wheel vibration of a vehicle according to Embodiment 3 of the present invention. The method in the embodiment of the present disclosure specifically includes:

S110, when different numerical mass blocks are pasted at a designated position of a front wheel of the vehicle through the steering wheel acceleration sensor, respectively test the steering wheel acceleration of the steering wheel for each mass block in a test period, and transmit the steering wheel acceleration to the controller.

Specifically, start from 0g and increase the weight of the mass block in units of 10g, and test the corresponding acceleration of the steering wheel under different weights. Taking the weight of the mass block as 10g as an example, paste it on the inner surface of the left front rim of the vehicle, and the steering wheel acceleration sensor 120 Measure the steering wheel acceleration corresponding to the mass block weighing 10g three times respectively. The test cycle corresponding to each test is the process of gradually accelerating from the vehicle start to the highest driving speed. The purpose of the three tests is to obtain the average value of multiple measurements. To ensure the accuracy of the test results, the average of the three measurement results is then transmitted to the controller 110 as the steering wheel acceleration.

Further, a total of two steering wheel acceleration sensors are provided, which are respectively arranged at positions a and b of the steering wheel, and positions a and b are arranged at 90° with the steering wheel rotation axis as the center in the steering wheel plane, which are the first steering wheel acceleration sensor and the first steering wheel acceleration sensor, respectively. The second steering wheel accelerometer is taken as an example when the weight of the mass attached to the inner surface of the left front rim of the vehicle is 10g. The first steering wheel acceleration sensor located at the steering wheel position a will measure the first steering wheel acceleration A corresponding to the 10g mass attached and It is transmitted to the controller, and the second steering wheel acceleration sensor located at the steering wheel position b will measure the second steering wheel acceleration B corresponding to the pasted 10g mass and transmit it to the controller.

S120. Obtain, through the controller, the maximum steering wheel circumferential vibration acceleration for each mass block in the test period according to the steering wheel acceleration, and obtain the minimum numerical mass block corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to a preset threshold, and set the minimum The numerical mass is used as the unbalanced mass tolerance value corresponding to the vibration of the steering wheel of the vehicle.

Specifically, the maximum steering wheel circumferential vibration acceleration of each mass block can be obtained through the cross-validation method, and the controller calculates the maximum steering wheel circumferential vibration acceleration of each mass block according to the first steering wheel acceleration and the second steering wheel acceleration. For example, control the The calculator calculates the maximum steering wheel circumferential vibration acceleration corresponding to the 10g mass block. When it is less than the preset threshold, it means that the steering wheel has not vibrated. At this time, the user can continue to increase the mass block in units of 10g to measure again, increasing the mass each time. Repeat the above test process after the weight of the block, and obtain the minimum value mass block corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to the preset threshold; the preset threshold is the maximum steering wheel sway allowed when the vehicle is artificially tested acceleration is set.

Exemplarily, the preset threshold is artificially set to 3m/s ² according to the maximum steering wheel sway acceleration allowed during the sway test of the vehicle, and the maximum steering wheel sway acceleration corresponding to pasting a 10g mass block is 2m/s ² , which is less than the preset threshold. , indicating that the steering wheel vibration did not occur when the 10g mass block was pasted, and the maximum steering wheel vibration acceleration corresponding to the 50g mass block was 4m/s ² greater than the preset threshold, indicating that the steering wheel vibration occurred when the 50g mass block was pasted, and when the 50g mass block was pasted. When the maximum steering wheel sway acceleration corresponding to the 60g mass block is greater than the preset threshold, the minimum numerical mass block, that is, 50g, is used as the unbalanced mass tolerance value corresponding to the vehicle steering wheel sway.

According to the technical solution of the embodiment of the present invention, the mass tolerance value of the steering wheel vibration to the wheel side unbalance can be measured by sticking mass blocks at the designated position of the wheel, which is used as the robustness evaluation index of the steering wheel vibration of the vehicle, and is used for the subsequent steering wheel vibration of the vehicle. Provide a basis for optimizing design and evaluation work.

Embodiment 4

FIG. 5 is a flowchart of a method for testing an unbalanced mass tolerance value for steering wheel vibration of a vehicle according to Embodiment 4 of the present invention. This embodiment adds a method flowchart for a display device on the basis of Embodiment 3 above, as shown in FIG. As shown in Fig. 5, the specific contents of steps S210 to S220 are substantially the same as those of steps S110 to S120 in the third implementation, so they are not repeated in this embodiment, and the methods of the embodiments of the present disclosure specifically include:

S210. When mass blocks with different values are pasted on a designated position of a front wheel of the vehicle through the steering wheel acceleration sensor, respectively test the steering wheel acceleration of the steering wheel for each mass block in a test period, and transmit the steering wheel acceleration to the controller.

S220. Obtain the maximum steering wheel circumferential vibration acceleration for each mass block in the test period through the controller according to the steering wheel acceleration, and obtain the minimum numerical mass block corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to a preset threshold, and set the minimum The numerical mass is used as the unbalanced mass tolerance value corresponding to the vibration of the steering wheel of the vehicle.

S230. The controller transmits the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value to the display device.

Specifically, when the controller obtains the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value, it is transmitted to the display device, so that the user can timely know the maximum steering wheel circumferential vibration acceleration when the vehicle steering wheel vibrates, the vehicle target Travel speed and unbalanced mass tolerance values.

S240. Display the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value through the display device.

Specifically, the display device may be a liquid crystal display screen, and the display device will display it after receiving the maximum steering wheel circumferential vibration acceleration, the vehicle target driving speed and the unbalanced mass tolerance value transmitted by the controller. For example, the user can display it on the liquid crystal display screen It can be used as an evaluation index to evaluate the tolerance of the steering wheel vibration to the vibration excitation of the unbalanced mass at the wheel side and the evaluation index of the design robustness, and then provide the optimal design and evaluation work for the steering wheel vibration. in accordance with.

Preferably, the controller transmits the maximum steering wheel circumferential vibration acceleration, the vehicle target traveling speed and the unbalanced mass tolerance value to the storage device; the maximum steering wheel circumferential vibration acceleration, the vehicle target traveling speed and the unbalanced mass tolerance value are transmitted through the storage device to store.

Specifically, when the controller obtains the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value, it is transmitted to the storage device, and the storage device can be a portable computer disk, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above; when controlling When the device obtains the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value, it is transmitted to the storage device for storage as historical information; it is convenient for users to read it when needed later.

According to the technical solution of the embodiment of the present invention, the mass tolerance value of the steering wheel vibration to the wheel side unbalance can be measured by sticking mass blocks at the designated position of the wheel, which is used as the robustness evaluation index of the steering wheel vibration of the vehicle, and is used for the subsequent steering wheel vibration of the vehicle. Provide a basis for optimizing design and evaluation work.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, and as long as the desired results of the technical solutions of the present invention can be achieved, no limitation is imposed herein.

The above-mentioned specific embodiments do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. an unbalanced mass tolerance test system for vehicle steering wheel vibration, is characterized in that, comprising: controller, the steering wheel acceleration sensor that is connected with described controller; The steering wheel acceleration sensor is used to test the steering wheel acceleration for each mass block of the steering wheel in a test cycle when the different numerical mass blocks are pasted at a designated position of a front wheel of the vehicle, and transmit the steering wheel acceleration to the a controller, wherein the test cycle includes starting the vehicle to a specified travel speed; The controller is configured to obtain the maximum steering wheel circumferential vibration acceleration for each mass block in the test period according to the steering wheel acceleration, and obtain the minimum value corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to a preset threshold A mass block is used, and the minimum value mass block is used as the unbalanced mass tolerance value corresponding to the vibration of the steering wheel of the vehicle. 2. The system of claim 1, further comprising a vehicle speed sensor connected to the controller; The vehicle speed sensor is used for acquiring the corresponding vehicle target driving speed when the maximum steering wheel circumferential vibration acceleration is detected, and transmitting the vehicle target driving speed to the controller. 3. The system according to claim 1, wherein the steering wheel acceleration sensor comprises a first steering wheel acceleration sensor located at a first position of the steering wheel, and a second steering wheel acceleration sensor located at a second position of the steering wheel, Wherein, the first steering wheel acceleration sensor and the second steering wheel acceleration sensor are arranged on the rim of the steering wheel, and are arranged at 90° with the rotation axis of the steering wheel as the center in the steering wheel plane. 4. The system according to claim 3, wherein the first steering wheel acceleration sensor is used to test the first steering wheel acceleration for each mass block at the first position of the steering wheel, and the first steering wheel the acceleration is transmitted to the controller; The second steering wheel acceleration sensor is used to test the second steering wheel acceleration for each mass at the second position of the steering wheel, and transmit the second steering wheel acceleration to the controller. 5 . The system according to claim 4 , wherein the controller is configured to obtain the maximum value for each mass in the test period according to the first steering wheel acceleration and the second steering wheel acceleration. 6 . Steering wheel circumferential vibration acceleration. 6. The system of claim 2, wherein the system further comprises a display device connected to the controller; the controller, configured to transmit the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value to the display device; The display device is used for displaying the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value. 7. The system of claim 1, further comprising a storage device connected to the controller; the controller, configured to transmit the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value to the storage device; The storage device is used for storing the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value. 8. A method for testing the unbalanced mass tolerance value for the vibration of a steering wheel of a vehicle, applied to the system of claims 1 to 7, characterized in that, comprising: When mass blocks with different values are pasted at a designated position of a front wheel of the vehicle through the steering wheel acceleration sensor, the steering wheel acceleration of the steering wheel for each mass block in a test cycle is respectively tested, and the steering wheel acceleration is transmitted to the controller, wherein , the test cycle includes from vehicle start to specified driving speed; Obtain the maximum steering wheel circumferential vibration acceleration for each mass block in the test period according to the steering wheel acceleration by the controller, and obtain the minimum numerical mass block corresponding to the maximum steering wheel circumferential vibration acceleration greater than or equal to a preset threshold, and The minimum numerical mass block is used as the unbalanced mass tolerance value corresponding to the vibration of the steering wheel of the vehicle. 9 . The method according to claim 8 , wherein the controller obtains the maximum steering wheel circumferential vibration acceleration for each mass block in the test period according to the steering wheel acceleration, and obtains the maximum steering wheel circumferential vibration acceleration. 10 . After the vibration acceleration is greater than or equal to the minimum numerical mass block corresponding to the preset threshold, and the minimum numerical mass block is used as the unbalanced mass tolerance value, the method further includes: Transmitting the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value to the display device through the controller; The maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value are displayed through the display device. 10 . The method according to claim 8 , wherein the controller obtains the maximum steering wheel circumferential vibration acceleration for each mass block in the test period according to the steering wheel acceleration, and obtains the maximum steering wheel circumferential vibration acceleration. 11 . After the vibration acceleration is greater than or equal to the minimum numerical mass block corresponding to the preset threshold, and the minimum numerical mass block is used as the unbalanced mass tolerance value, the method further includes: transmitting the maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value to the storage device through the controller; The maximum steering wheel circumferential vibration acceleration, the vehicle target running speed and the unbalanced mass tolerance value are stored by the storage device.

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