Method for eliminating low-speed jitter of electric automobile
An electric vehicle, low-speed technology, applied in the direction of electric vehicles, control drive, power management, etc., can solve problems such as low-speed jitter of electric vehicles, and achieve the effect of improving comfort and solving low-speed jitter
Active Publication Date: 2020-02-28
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 automobile control, and discloses a method for eliminating low-speed jitter of an electric automobile. The method comprises the following stepsof 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; performing difference on thevehicle speed signals before and after filtering to obtain a speed error signal, and performing low-pass filtering on the speed error signal to obtain a low-pass filtered speed error signal; acquiringa speed reference value of torque compensation; performing difference on the speed reference value of the torque compensation and the real-time vehicle speed signal detected by the vehicle speed detection module to obtain another speed error signal; acquiring a compensation torque; and superposing the compensation torque and a given torque of a motor controller to generate a target execution torque to serve as a final output torque of a motor. According to the method, the problem of low-speed jitter of the electric automobile is 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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Login to View More IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/423Y02T10/72
Inventor 彭倬赵彦军杜戈阳
Owner SHENZHEN FREECOOL SCI & TECH