Control system for eliminating low-speed shaking of motor-driven vehicle

Abstract

The invention discloses a control system for eliminating low-speed shaking of a motor-driven vehicle. The control system comprises a vehicle controller, a motor controller, a motor, an accelerator pedal, a brake pedal and a shaking torque inhibiting module, signals of the accelerator pedal and the brake pedal are input into the vehicle controller, the vehicle controller sends torque control signals to the motor controller according to the signals of the accelerator pedal and the brake pedal, the motor controller controls the motor to output torque to drive the vehicle, the shaking torque inhibiting module collects rotating speed signals of the motor and speed signals of the vehicle and outputs shaking torque inhibiting signals to the motor controller after calculation according to torque output signal sent by the vehicle controller, and the motor controller controls running of the motor according to the torque output signals and the shaking torque inhibiting signals which are superposed. By the control system, shaking of the vehicle in the process of low-speed traveling is reduced from the prospective of motor control, the defects of a conventional shaking eliminating method are overcome, and riding comfortableness of the vehicle is effectively improved.

Description

technical field [0001] The invention relates to a control system for eliminating low-speed vibration of a motor-driven vehicle. Background technique [0002] Due to the increasing shortage of oil and rising oil prices, electric vehicles driven by motors have developed rapidly. Such vehicles usually adopt a clutchless structure and are directly driven by a motor or driven by a single-stage reducer. Due to the large output torque ripple of the motor, the small moment of inertia of the motor rotor, the excessive gear clearance of the transmission system, and the lack of rigidity of the entire transmission system, motor-driven vehicles are very prone to vibration problems during low-speed driving, which affects the entire vehicle. ride comfort. [0003] At present, in order to solve the problem of low-speed vibration of motor-driven vehicles, methods of improving the transmission system are usually adopted, such as improving the design of the motor to optimize the torque ripple...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a control system for eliminating low-speed jitter of motor-driven vehicles. This control system reduces the jitter during low-speed driving of the vehicle from the perspective of motor control, overcomes the defects of traditional methods for eliminating jitter, and effectively improves ride comfort

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