Pure electric automobile shaking rejection method based on gear abutting strategy and active damping

Abstract

The invention discloses a pure electric automobile shaking rejection method based on a gear abutting strategy and active damping. The pure electric automobile shaking rejection method based on the gear abutting strategy and the active damping comprises the steps of firstly, determining a gear abutting moment value and a requested moment accuracy value of a vehicle controller; when a requested moment of the vehicle controller falls within a range, enabling the requested moment to be constantly equal to the gear abutting moment; and otherwise, performing no processing; secondly, obtaining a rotation speed feedback value through rotary transformation; carrying out low-pass filtering on the rotation speed feedback value so that the rotation speed feedback value is closer to an actual value; processing the low-pass filtered rotation speed signal in a differential operation processing link and an inertial link in sequence; limiting an amplitude of an output of the inertial link; and correcting the requested moment of the vehicle controller by using an amplitude limiting output value to realize an effect of rejecting shaking. According to the pure electric automobile shaking rejection method based on the gear abutting strategy and the active damping, by appropriately adjusting a step length of a motor in response to a vehicle expected moment and increasing a rotation speed feedback link to correct the vehicle expected moment, an effect of rejecting the vehicle shaking is realized, and the driving and taking experience is improved.

Description

technical field [0001] The invention relates to a vibration suppression method of a pure electric vehicle based on a tooth leaning strategy and active damping. Background technique [0002] When the motor controller drives the pure electric vehicle to run, when the output torque of the motor is transmitted through the mechanical transmission system of the vehicle, there will be a non-linear torque transmission during the transient transition process, resulting in changes in the internal stress of the drive shaft of the vehicle body. As a result, the speed of the vehicle fluctuates. When the speed fluctuation exceeds a certain value, it will cause obvious discomfort to the human body, thereby affecting the driving experience. [0003] When the whole vehicle is driven by the traction force of the motor, the mechanical transmission system of the whole vehicle drives the whole vehicle through the interaction of the transmission components. However, during the rapid acceleratio...

AI Technical Summary

Problems solved by technology

[0002] When the motor controller drives the pure electric vehicle to run, when the output torque of the motor is transmitted through the mechanical transmission system of the vehicle, there will be a non-linear torque transmission during the transient transition process, resulting in changes in the internal stress of the drive shaft of the vehicle body. This leads to the phenomenon that the speed of the whole vehicle fluctuates

When the speed fluctuation exceeds a certain value, it will cause obvious discomfort to the human body, thus affecting the driving experience

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