Electric-vehicle driving anti-sliding and anti-lock braking control method and system

Abstract

The invention discloses an electric-vehicle driving anti-sliding and anti-lock braking control method. The method includes the steps that a set value of whole vehicle torque is obtained, working modesof an electric vehicle are obtained, and a vehicle-speed change rate threshold value and a motor-output maximum torque amplitude value under corresponding working modes are obtained; the real-time vehicle speed change rate of the vehicle is obtained, and the torque regulating amount is calculated through the vehicle-speed change rate threshold value and the real-time vehicle speed change rate; according to the torque adjusting amount, the set value of the whole vehicle torque and the motor-output maximum torque amplitude value, a motor actual-torque command value is obtained, and the motor isdriven to adjust the torque. According to the electric-vehicle driving anti-sliding and anti-lock braking control method, a vehicle-speed measuring device is not required to be installed, the groundroad condition is not required to be identified and estimated, and the driving anti-sliding and anti-lock braking function of a common electric vehicle can be achieved without additionally arranging any other hardware and equipment resources; the electric-vehicle driving anti-sliding and anti-lock braking control method can adapt to various different driving systems and different road conditions,and can be transplanted to any hybrid power vehicle.

Description

technical field [0001] The invention relates to automatic control technology in the field of electric vehicles, in particular to a method and system for controlling driving anti-skid and braking anti-locking of electric vehicles. Background technique [0002] The drive anti-skid and brake anti-lock braking system is a safety system of the car, which ensures that the vehicle can make full use of the ground adhesion and prevent the wheels from slipping, thereby improving the driving acceleration performance and operation stability of the vehicle, and can be used to a certain extent Improve the safety and passability of vehicles, and improve the adaptability of vehicles to various road conditions. [0003] In the prior art, the methods related to driving anti-skid and braking anti-lock of electric vehicles are relatively complicated or the effect is not ideal. One of the methods needs to estimate the adhesion parameters of the ground, and realize the driving anti-skid and brak...

AI Technical Summary

Problems solved by technology

Another method needs to obtain the speed of the vehicle through the speed measurement system to realize the functions of anti-skid and anti-lock. In the process of realization, an additional speed measurement device needs to be installed

There are also some methods to control by selecting a logic threshold, but the threshold value of this method is difficult to determine, the output torque fluctuates greatly, the system stability is poor, and its versatility and robustness are also poor

Images