Control method for eliminating jitter of pure electric vehicle

Abstract

The invention relates to a control method for eliminating jitter of a pure electric vehicle. A vehicle control unit analyzes the real driving intention of a driver by acquiring accelerator pedal signals, gear signals and brake pedal signals, and thus calculates driver required torque TqDrvReq; a motor controller feeds back a motor actual revolving speed signal MotSpd of the vehicle control unit, and the vehicle control unit filters the MotSpd to obtain MotSpdFil. Through the difference between the MotSpdFil and the MotSpd, corrected torque TqCorr is calculated by adopting a PID (Proportion Integration Differentiation) algorithm to correct the driver required torque. Through superposition of the TqDrvReq and the TqCorr, final required torque TqReq is obtained and is transmitted to the motor controller to execute the torque. The method can eliminate the jitter of the vehicle; compared with the traditional methods of reducing the gear clearance and optimizing the driving structure, the method has the advantages of low cost, simplicity in implementation, easiness in verification, good effect and the like.

Description

technical field [0001] The invention belongs to the field of control strategies for electric control systems of new energy vehicles, and relates to a control method for eliminating vehicle vibration of new energy pure electric vehicles. [0002] Background technique [0003] In today's world, with the rapid development of the automobile industry, the number of traditional automobiles has increased sharply. At present, traditional cars have had a huge impact on climate change, environmental pollution, energy shortage and other aspects. In response to the above problems, pure electric vehicles have emerged as the times require, which can effectively solve the above-mentioned series of problems. However, based on the difference between the transmission structure of pure electric vehicles and traditional vehicles, pure electric vehicles do not have clutches and traditional gearboxes, but only a reducer, which is basically a rigid connection. Due to this characteristic, the ve...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a control method for eliminating vehicle jitter of pure electric vehicles. The method is based on speed filtering and variable parameter PID control algorithm to solve the problem of pure electric vehicle vehicle jitter, so that the comfort of the vehicle meets the requirements

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