Active anti-skid control method for electric automobile

Abstract

The invention relates to the technical field of automobile control methods, in particular to an active anti-skid control method for an electric automobile. The method comprises steps of acquiring vehicle operation information, acquiring vehicle required torque and actual motor rotating speed of the vehicle, judging whether a brake switch of the vehicle is invalid or not to obtain a judgment result, comparing the actual motor rotating speed with a set value obtained by calibration to obtain a comparison structure, and combining the judgment result with the comparison result to obtain a comparison result; and determining that the output vehicle target torque is 0, or vehicle required torque, or vehicle required torque corrected through a correction coefficient, wherein the correction coefficient is a correction value obtained by calculating a torque threshold value of a driving motor of the front axle vehicle. The control method provided by the invention is extremely simple, can intervene in advance for active skid resistance before the wheel slides, adopts different control strategies according to different conditions, is better in pertinence, and has a great popularization value.

Description

technical field [0001] The invention relates to the technical field of automobile control methods, in particular to an active anti-skid control method for electric automobiles. Background technique [0002] Electric vehicles have high safety requirements. The anti-skid control device of the existing electric vehicle adopts the calculation of the reference vehicle speed based on the wheel speed sensor, and then calculates the actual slip rate of the wheel according to the reference wheel, and compares the actual slip rate with the optimal slip rate to determine the driving torque of the driving wheel. Carry out torsion reduction control, so as to realize the technical solution of preventing the wheel from slipping. There are following disadvantages in this technical scheme: [0003] First, when the speed of the whole vehicle is low, the accuracy of the wheel speed sensor is low, which may easily lead to a larger calculation of the reference speed, resulting in abnormal torq...

AI Technical Summary

Problems solved by technology

[0003] First, when the speed of the whole vehicle is low, the accuracy of the wheel speed sensor is low, which may easily lead to a relatively large calculation of the reference speed, resulting in abnormal torque drop

[0004] Second, the working environment of the wheel speed sensor is harsh, which can easily cause damage to the wheel speed sensor, resulting in the failure of the driving anti-skid function based on the slip rate, causing safety accidents

[0005] Third, this solution is a passive anti-skid solution. Only when the wheels are in a certain degree of slippage can the control of anti-skid and torsion reduction be carried out. In extreme working conditions, there will be functional delays leading to traffic accidents.

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