A pr shake suppression method based on stagnation point calibration

Abstract

The invention discloses a PR vibration suppression method based on stagnation point calibration, which comprises the following steps: obtaining the real-time rotation speed of the motor; determining the vibration frequency interval during the running process of the vehicle without any vibration suppression; Obtain the real-time jitter frequency of the motor speed through the method of stagnation point calculation; design a PR proportional resonant filter according to the real-time jitter frequency of the motor speed, and obtain the jitter amount of the motor speed through the PR proportional resonant filter; The requested torque sent by the controller is compensated to suppress chatter. The shaking suppression method disclosed in the present invention can effectively suppress the shaking that occurs during the running of the whole vehicle, enhance the stability of the car, and improve the driving experience of the user. At the same time, the method is applicable to various speed stages during the running of the whole vehicle, and has a wide range of applications .

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a PR vibration suppression method based on stagnation point calibration. Background technique [0002] With the continuous improvement of battery electric drive technology, coupled with the country's strong support for new energy vehicles, the market penetration rate of new energy vehicles has become higher and higher; With the rapid development of technology, new energy vehicles will surely become a popular means of transportation for human travel in the future. As the core part of new energy vehicles: vehicle drive motor technology is the key to making a good car; because new energy vehicles accelerate quickly, and the motor can work in the state of power generation, that is, the vehicle can not only brake mechanically, but also Braking can be performed with energy recuperation. Due to the common battery life anxiety of current new energy vehicles, this determines t...

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves the technical problem that the original new energy electric vehicle is prone to vibration during operation; it provides a PR vibration suppression method based on stagnation point calibration, which suppresses the vibration of the new energy electric vehicle by compensating the requested torque sent by the VCU. Vibration generated during operation improves driving comfort and driving experience

[0005] The present invention simultaneously solves the technical problem that the original new energy electric vehicle cannot effectively suppress the jitter during high-speed operation; it provides a PR jitter suppression method based on stagnation point calibration, which uses the Kalman observer to observe the motor jitter acceleration in real time, and the PD The closed-loop control obtains the compensation torque, effectively suppresses the noise interference generated by the PR filter in the process of suppressing the jitter at the high-speed stage, and expands the use speed range of the method of the present invention

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