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System and Control Algorithms for Active Vibration Control in Electric Vehicles

An active vibration control, electric vehicle technology, applied in electric vehicles, control drive, power management, etc., can solve the problems that the system cannot stabilize quickly, the degree of vibration suppression is not large enough, and the passenger comfort is poor, and the accuracy is improved. , the effect of reducing impact and convenient parameter adjustment

Active Publication Date: 2021-09-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Traditional control systems, such as feedforward-feedback control, PID control, etc., have a certain suppression effect on the low-frequency torsional vibration of the power transmission system, but the degree of suppression of vibration is not large enough, and the comfort of passengers is still very poor.
Furthermore, the convergence of the traditional control system is poor, and the system cannot quickly stabilize

Method used

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  • System and Control Algorithms for Active Vibration Control in Electric Vehicles
  • System and Control Algorithms for Active Vibration Control in Electric Vehicles
  • System and Control Algorithms for Active Vibration Control in Electric Vehicles

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Embodiment Construction

[0027] The present invention is a system and control algorithm for active vibration control of electric vehicles. The control steps include: the vehicle controller receives the driver's intention and the pedal signal and outputs the initial reference torque signal of the motor torque according to these two signals, through Time delay module 1# delays the rise time of the reference torque, and then divides the motor torque signal output by time delay module 1# according to a certain ratio. The first part is directly output to terminal b, and the other part is passed through time delay module 2#. The occurrence time is delayed and the result is output to terminal a. This control strategy adopts the waveform superposition algorithm. At the same time, the motor output shaft angular velocity signal and the smooth motor reference torque signal input to the motor controller after control are input to the state observer together. The state observer estimates the motor output angular ve...

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Abstract

The invention discloses a system and a control algorithm for active vibration control of an electric vehicle. The vehicle controller receives the driver's steering signal and the pedal signal and outputs an initial reference torque signal; the initial reference torque signal is controlled by waveform superimposition to obtain a smooth rise. And there is a time-delayed reference torque signal; output the torque signal through the pole displacement control algorithm to compensate the system vibration; input the compensated motor torque signal into the motor controller to control the motor, so as to actively control the torsional vibration of the electric vehicle power transmission system control. The invention has fast convergence, combines two control algorithms of waveform superposition control and pole displacement control, and has good control effect and strong adaptability.

Description

technical field [0001] The invention belongs to the technical field of low-frequency vibration control of an electric vehicle power transmission system, and in particular relates to a system and a control algorithm for active vibration control of an electric vehicle. Background technique [0002] Vibration is a common phenomenon in the process of electric vehicles in motion. In the working conditions of electric vehicles such as starting or braking, the power transmission system will have obvious torsional vibration phenomenon, which shows the longitudinal vibration of the whole vehicle, which is a common phenomenon in the automotive industry. Said "shuffle" problem. The harm of vibration to electric vehicles and passengers is mainly manifested in the following aspects: 1) the energy loss increases, and the transmission efficiency of the power transmission system is greatly reduced; 2) the direct damage to the motor, drive shaft, universal joint and other components reduces ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 翁建生徐荔远
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS