A method for active anti-skid control of electric vehicles

Abstract

The invention relates to the technical field of automobile control methods, in particular to an active anti-skid control method for electric automobiles. Collect vehicle running information, obtain the vehicle's required torque and the actual speed of the motor, judge whether the brake switch of the vehicle is invalid, obtain the judgment result, compare the actual speed of the motor with the set value obtained by calibration, and obtain a comparison For the structure, combined with the judgment result and the comparison result, it is determined that the output vehicle target torque is 0, or is the vehicle demand torque, or is the vehicle demand torque corrected by the correction coefficient; the correction coefficient is calculated by The correction value obtained by the torque threshold of the drive motor of the axle vehicle. The control method of the present invention is extremely simple, can intervene in advance to carry out active anti-skid before the wheel slips, and adopts different control strategies according to different situations, which is more targeted and has great promotion 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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