Vehicle anti-lock brake control method based on least squares support vector machine

A support vector machine and anti-lock braking technology, applied in the direction of brakes, adaptive control, general control systems, etc., can solve the problems of inaccurate control parameters and high development costs, and achieve simple calculation methods, low development costs, and development short cycle effect

Inactive Publication Date: 2008-11-26
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that in the prior art automobile anti-lock braking control method, real-time identification of road surface conditions is required, and a long road test period is required to match the control parameters in the algorithm. The control parameters are inaccurate, and the development Defects such as high cost

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  • Vehicle anti-lock brake control method based on least squares support vector machine
  • Vehicle anti-lock brake control method based on least squares support vector machine
  • Vehicle anti-lock brake control method based on least squares support vector machine

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Embodiment Construction

[0009] The present invention designs an automobile anti-lock braking control method based on a least squares support vector machine (LS-SVM). The method utilizes a mature automobile ABS ECU as a controller to perform anti-lock braking under various road conditions In the braking control experiment, the wheel speed sensor and pressure sensor are used to collect the wheel speed and the pressure signal of the brake wheel cylinder during the experiment. According to the wheel speed and sampling period, the angular deceleration of the wheel is obtained by using the differential method, which can Compare the relationship between three or more wheel angular decelerations, determine the peak value of the wheel speed curve according to the positive and negative relationship changes of the wheel angular deceleration, and obtain the reference deceleration of the vehicle body according to the slope of the line connecting the peaks of two adjacent wheel speed curves , calculate the vehicle ...

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Abstract

The invention discloses a method for controlling an anti-lock braking system of automobiles, which bases on least squares support vector machines (LS-SVM) and relates to the technical filed of the electronic control of the automobiles. The controlling method estimates automobile body deceleration according to the wheel velocity peak values of four wheels; the automobile body reference speed is calculated according to the automobile body deceleration and then the reference slip rate of the wheels is obtained by calculation; the angular deceleration of the wheels is calculated according to the angular speed of the wheels; the angular speed and reference slip rate of every wheel are respectively taken as input to construct a controller of the least squares support vector machines; the expected brake pressure of every wheel is calculated; according to the expected brake pressure, a pulse width modulation method is adopted to control the on/off time of an electromagnetic valve, thus controlling the brake pressure and realizing safety braking. The method is applicable to controlling the anti-lock braking system (ABS) of automobiles.

Description

technical field [0001] The invention relates to the technical field of automobile electronic control, in particular to a control method of an automobile anti-lock braking control system. Background technique [0002] Automobile anti-lock braking control system (ABS) is an important electronic system to ensure that the wheels do not lock during emergency braking. In order to ensure that the wheels do not lock and brake at a faster speed, ABS must Different road conditions use different control strategies, so the ABS system must identify the road conditions in real time, and then adopt different control strategies to control the braking system according to the road conditions. The existing mature ABS control methods mainly include auxiliary reference slip rate method based on wheel acceleration and deceleration threshold, fuzzy control method, method based on neural network, method based on intelligent control, etc. However, the common problem of these control methods is that...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/17G05B13/04
Inventor 郑太雄冯辉宗李锐李银国王平郭文浩
Owner CHONGQING UNIV OF POSTS & TELECOMM
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