A method to eliminate low-speed vibration of electric vehicles
An electric vehicle, low-speed technology, applied in the direction of electric vehicles, power management, control drive, etc., can solve the problems of low-speed jitter of electric vehicles, achieve the effect of improving comfort and solving low-speed jitter
Active Publication Date: 2021-06-18
SHENZHEN FREECOOL SCI & TECH
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[0004] The purpose of the embodiments of the present invention is to provide a method for eliminating low-speed jitter of electric vehicles, which can solve the problem of low-speed jitter of electric vehicles
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0017] The specific realization of the present invention is described in detail below in conjunction with specific embodiment:
[0018] A method for eliminating low-speed vibration of an electric vehicle, comprising the following steps:
[0019] The real-time vehicle speed signal is detected by the vehicle speed detection module, and the vehicle speed signal is filtered to obtain the filtered vehicle speed signal;
[0020] Carrying out difference of the vehicle speed signal before and after filtering to obtain a speed error signal, and performing low-pass filtering processing on the speed error si...
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The invention belongs to the technical field of electric vehicle control, and discloses a method for eliminating low-speed vibration of an electric vehicle, comprising the following steps: detecting a real-time vehicle speed signal through a vehicle speed detection module, and filtering the vehicle speed signal to obtain a filtered vehicle speed signal ; The difference between the vehicle speed signal before and after filtering is obtained to obtain the speed error signal, and the speed error signal is processed by low-pass filtering to obtain the speed error signal processed by the low-pass filter; obtain the speed reference value of torque compensation; Make difference between the compensated speed reference value and the real-time vehicle speed signal detected by the vehicle speed detection module to obtain another speed error signal; obtain the compensation torque; superimpose the compensation torque and the given torque of the motor controller to generate the target execution torque , as the final output torque of the motor. The invention realizes that the low-speed vibration problem of the electric vehicle can be solved.
Description
technical field [0001] The invention belongs to the technical field of electric vehicle control, and in particular relates to a method for eliminating low-speed vibration of an electric vehicle. Background technique [0002] Generally, the control mode of the electric vehicle motor is the torque mode, and the jitter of the electric vehicle at low speed is caused by the output torque fluctuation of the motor and the mechanical resonance of the transmission system. The existing method of suppressing the low-speed jitter of electric vehicles is to passivate the execution torque by changing the change step size of the low-speed output torque to reduce the impact of the motor output torque fluctuation over time, or to reduce The vibrator solves the jitter caused by low-speed resonance. [0003] In the existing technology, adding hardware to solve the low-speed jitter will increase the cost, and the method of passivating the execution torque by changing the change step size of th...
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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/423Y02T10/72
Inventor 彭倬赵彦军杜戈阳
Owner SHENZHEN FREECOOL SCI & TECH