Electric automobile anti-slip control system and control method

Abstract

The invention provides an electric automobile anti-slip control system. The electric automobile anti-slip control system comprises a vehicle control unit, a PID controller, a driving motor, a TAmax storage device and a TA value detection module; the vehicle control unit is connected with the PID controller and the driving motor; the TA value detection module is connected with the driving motor and the PID controller; the TAmax storage device is connected with the PID controller; the vehicle control unit is used for exciting the driving motor; the TA value detection module is used for detecting a TA value signal output by the driving motor; the PID controller compares a TAmax value and a TA value and sends an instruction to the vehicle control unit so that the TA value can be smaller than the TAmax value all the time; the TAmax storage device is used for storing the TAmax value; and the TA value is equal to the specific value of the driving wheel angular acceleration and the motor torque. According to the electric automobile anti-slip control system, a parameter TA is used for replacing the traditional slip rate, measurement of a vehicle speed signal is avoided, and equipment for measuring the vehicle speed is not needed; and meanwhile, dependency on assistance of a traditional hydraulic braking system is not needed, the production cost is reduced, and the system stability is improved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric vehicle anti-skid control system and control method based on the ratio of wheel angular acceleration and motor torque. Background technique [0002] From a control point of view, the main advantage of an electric motor over an internal combustion engine is that it can be used both as a drive and as an actuator. As a driving device, its small size and high power output allow it to have a variety of vehicle drive configurations. As an actuator, the fast response characteristics and torque information feedback realize more accurate and effective dynamic real-time control. Therefore, electric vehicles are not only green and environmentally friendly, but also a driving experience with higher active safety, handling stability and better ride comfort can be realized through advanced electrification control technology. [0003] In the safety anti-skid control of vehicles, a...

AI Technical Summary

Problems solved by technology

However, on the one hand, this method relies on the hydraulic brake mechanism to complete the action execution, which increases the cost of the brake; on the other hand, this method requires the necessary sensing equipment to complete the accurate measurement of the vehicle speed, such as accelerometers, optical sensors, GPS, etc. These devices will lead to an increase in cost; the increase in its equipment also makes it prone to failure or signal failure under certain conditions, such as difficulty in obtaining GPS signals in tunnels, etc.

Images