CN-121989911-A - Method for adjusting dynamic control function of vehicle based on road condition and electronic equipment

Abstract

The invention discloses a method and electronic equipment for adjusting a vehicle dynamic control function based on road conditions, which are suitable for an ESC system, and comprise the steps of introducing a hollow bad road identification in a vehicle dynamic control function activation condition; and in the pit bad road identification process, after the wheel, the wheel speed sensor and the acceleration sensor arranged in the ESC system are synchronously oscillated, obtaining oscillation signals sent by the wheel speed sensor and the acceleration sensor, and judging the oscillation amplitude and the oscillation period step by step through the threshold value. The method has the advantages that the pit bad road identification is introduced into the activation condition of the vehicle dynamic control function of the ESC system, so that the ESC system can not only identify driving road conditions, but also has independent control logic for the vehicle dynamic control function under different road conditions, and the activation mode of the vehicle dynamic control function in the ESC system is increased.

Inventors

• XU SONGYUN
• ZHU PO
• QIAN XIN

Assignees

• 千顾汽车科技(江苏)有限公司

Dates

Publication Date

20260508

Application Date

20231226

Claims (10)

1. 1. A method for adjusting a dynamic control function of a vehicle based on road conditions, which is applicable to an ESC system, and is characterized by comprising the following steps: Introducing a hollow bad road identification into a vehicle dynamic control function activation condition; Acquiring a basic threshold value of a dynamic control function of a vehicle under the current speed/current steering wheel angle of the vehicle, and setting a pit bad road identification threshold based on the basic threshold value; In the identification process of the hollow bad road, after a wheel, a wheel speed sensor and an acceleration sensor arranged in the ESC system are synchronously oscillated, obtaining oscillation signals sent by the wheel speed sensor and the acceleration sensor, and judging the oscillation amplitude and the oscillation period step by step through a threshold value; Identifying a hollow bad road based on the step-by-step judging result; when the identification result of the hollow bad road is false, the output threshold value activated by the dynamic control function of the vehicle is the basic threshold value; And when the identification result of the hollow bad road is true, calculating a compensation value based on the current vehicle speed, the current vehicle steering wheel angle and the basic threshold value, and calculating an output threshold value for activating the dynamic control function of the vehicle through the compensation value.
2. 2. The method of claim 1, wherein the pothole bad road recognition threshold is set by a weight of multiple accumulation of wheel accelerations and an acceleration sensor signal oscillation frequency built in the ESC system.
3. 3. The method for adjusting a dynamic control function of a vehicle based on a road condition according to claim 1, wherein the step-by-step determination includes a determination between an oscillation amplitude of the wheel speed sensor and the threshold value, specifically comprising the steps of: s1, calling an oscillation signal of the wheel speed sensor and judging whether the oscillation amplitude of the wheel speed sensor is larger than or equal to the threshold value; If not, identifying that the state of the hollow bad road condition is false, wherein the output threshold value activated by the dynamic control function of the vehicle is the basic threshold value; If yes, go to step S2.
4. 4. A method for adjusting a dynamic control function of a vehicle based on road conditions according to claim 3, wherein the step-by-step determination includes a determination between an oscillation period of a wheel speed sensor and the threshold value, and specifically comprises the steps of: S2, calling an oscillation signal of the wheel speed sensor and judging whether the oscillation period of the wheel speed sensor is smaller than or equal to the threshold value; If not, identifying that the state of the hollow bad road condition is false, wherein the output threshold value activated by the dynamic control function of the vehicle is the basic threshold value; if yes, go to step S3.
5. 5. The method for adjusting a dynamic control function of a vehicle based on road conditions according to claim 4, wherein the step-by-step judgment includes judgment between an oscillation amplitude of an acceleration sensor and the threshold value, specifically comprising the steps of: s3, calling an oscillation signal of the acceleration sensor and judging whether the oscillation amplitude of the acceleration sensor is larger than or equal to the threshold value; If not, identifying that the state of the hollow bad road condition is false, wherein the output threshold value activated by the dynamic control function of the vehicle is the basic threshold value; If yes, go to step S4.
6. 6. The method for adjusting a dynamic control function of a vehicle based on a road condition according to claim 5, wherein the step-by-step judgment includes judgment between an oscillation period of an acceleration sensor and the threshold value, specifically comprising the steps of: s4, calling an oscillation signal of the acceleration sensor and judging whether the oscillation period of the acceleration sensor is smaller than or equal to the threshold value; If not, identifying that the state of the hollow bad road condition is false, wherein the output threshold value activated by the dynamic control function of the vehicle is the basic threshold value; If yes, the condition state of the hollow bad road is identified to be true.
7. 7. The method for adjusting a dynamic control function of a vehicle based on a road condition according to claim 1, wherein the compensation value is calculated as follows: Offset(B)=max(((a–σ)*(1–5.73*S–(V/16.67))),0); Wherein: Offset (B) is the final calculated compensation value; a is a basic constant, and is based on a calculated value of a dynamic control function of a specific vehicle, which is mistakenly touched when the specific vehicle runs at a speed of 50Km/h in a straight line; S is the absolute value of the steering wheel turning angle in real time, and the unit is radian; v is the real-time vehicle speed, and the unit is m/s; sigma-based said vehicle dynamics control function triggers a threshold, i.e. said base threshold.
8. 8. The method of adjusting a vehicle dynamic control function based on road conditions of claim 1, wherein the output threshold value at which the vehicle dynamic control function is activated is the sum of the base threshold value and the compensation value.
9. 9. The method for adjusting a dynamic control function of a vehicle based on road conditions according to claim 2, wherein the multiple accumulated weights are the sum of wheel acceleration threshold weights triggered by ABS and TCS functions of the vehicle.
10. 10. An electronic device, comprising a storage component and a processing component, wherein the storage component stores one or more computer program instructions for the processing component to invoke and execute, so as to implement the method for adjusting a vehicle dynamic control function based on road conditions according to any one of claims 1 to 9.

Description

Method for adjusting dynamic control function of vehicle based on road condition and electronic equipment Technical Field The invention relates to the technical field of vehicle safety, in particular to a method for adjusting a vehicle dynamic control function based on road conditions and electronic equipment. Background ESC is an abbreviation of electronic car body stability control system, also called as car dynamic stability system, ESC is a car safety system, which judges whether the car is in normal running state by monitoring the parameters of car speed, steering angle, tyre side force, etc. and intervenes when necessary, such as adjusting engine output, brake force distribution, etc. to maintain the stability and control of the car. When the system detects that the vehicle is out of control or slipping, the ESC starts intervening vehicle control, the ESC activates the vehicle dynamic control function, and the stability and the control of the vehicle are restored by adjusting the engine output, the brake force distribution, the speed reduction and other measures. In a vehicle equipped with the ESC, the vehicle is easy to sideslip due to the fact that the yaw moment of the vehicle exceeds the expectations of a driver during a high-speed emergency lane change, and a vehicle dynamic control function (VDC) of the ESC is activated to control the yaw moment exceeding the expectations of the driver, and meanwhile, a vehicle instrument can flash an ESC working indicator lamp and is accompanied with working noise of the ESC for active intervention. When a vehicle enters a hollow bad road, continuous road surface fluctuation easily enables the vehicle to continuously shake left and right, so that the dynamic control function of the vehicle is frequently activated and the driver is involved in controlling the vehicle. Disclosure of Invention The invention provides a method for adjusting a vehicle dynamic control function based on road conditions, which is suitable for an ESC system and comprises the steps of introducing a bad road identification into a vehicle dynamic control function activation condition, acquiring a basic threshold value of the vehicle dynamic control function under the condition of a current vehicle speed/current vehicle steering wheel corner, setting the bad road identification threshold value based on the basic threshold value, acquiring oscillation signals sent by a wheel speed sensor and an acceleration sensor arranged in the ESC system after the wheel speed sensor and the acceleration sensor are synchronously oscillated in the bad road identification process, judging the oscillation amplitude and the oscillation period step by step through a threshold value, identifying the bad road based on the result of the step judgment, when the bad road identification result is false, enabling an output threshold value activated by the vehicle dynamic control function to be the basic threshold value, calculating a compensation value based on the current vehicle speed, the current vehicle steering wheel corner and the basic threshold value when the bad road identification result is true, and calculating the output threshold value activated by the vehicle dynamic control function. Preferably, the pit bad road recognition threshold is set through a weight obtained by accumulating the wheel accelerations for a plurality of times and the signal oscillation frequency of an acceleration sensor arranged in the ESC system. Preferably, the step-by-step judgment includes judgment between the oscillation amplitude of the wheel speed sensor and the threshold value, and specifically includes the following steps: s1, calling an oscillation signal of the wheel speed sensor and judging whether the oscillation amplitude of the wheel speed sensor is larger than or equal to the threshold value; If not, identifying that the state of the hollow bad road condition is false, wherein the output threshold value activated by the dynamic control function of the vehicle is the basic threshold value; If yes, go to step S2. Preferably, the step-by-step judgment includes judgment between the oscillation period of the wheel speed sensor and the threshold value, and specifically includes the following steps: S2, calling an oscillation signal of the wheel speed sensor and judging whether the oscillation period of the wheel speed sensor is smaller than or equal to the threshold value; If not, identifying that the state of the hollow bad road condition is false, wherein the output threshold value activated by the dynamic control function of the vehicle is the basic threshold value; if yes, go to step S3. Preferably, the step-by-step judgment includes judgment between the oscillation amplitude of the acceleration sensor and the threshold value, and specifically includes the following steps: s3, calling an oscillation signal of the acceleration sensor and judging whether the oscillation amplitude of the acceleration sensor is larger than