Control system and method for reducing constant-speed cruising speed fluctuations of electric automobile
A constant speed cruise and speed fluctuation technology, applied in electric vehicles, control drive, power management, etc., can solve the problems of large vehicle speed fluctuations, vehicle speed fluctuations, and affecting ride comfort, so as to improve comfort and reduce fluctuations Effect
Active Publication Date: 2015-11-11
SHENZHEN BUSBAR SCI TECH DEV
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Problems solved by technology
[0002] When the electric vehicle is running in the cruise control mode, the driver of the electric vehicle is essentially in the speed closed-loop operation mode, and the speed loop controller is generally a PI controller. When the vehicle resistance changes, the PI controller will have overshoot. causing speed fluctuations
Therefore, in the case of unequal road surface resistance changes, there will be a large number of adjustment processes in the PI controller, resulting in large fluctuations in vehicle speed and affecting ride comfort
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[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be further described below in conjunction with the accompanying drawings.
[0027] Such as figure 1 As shown, the present invention reduces the control system of the constant speed cruising speed fluctuation of an electric vehicle, including a vehicle controller 10, a proportional integral controller 30, a motor operation model 40, and a speed encoder 50, wherein:
[0028] The vehicle controller 10 is used to output a rotation speed instruction for controlling the motor to rotate at a preset rotation speed to the proportional integral controller 30 .
[0029] The speed encoder 50 is used to obtain the actual rotational speed information of the electric motor, and feed back the actual rotational speed information to the active damping control unit 20 and the proportional-integral c...
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The invention discloses a control system for reducing constant-speed cruising speed fluctuations of an electric automobile, which comprises a whole-automobile controller, an active damping control unit, a proportional integral controller, a motor operation model and a speed encoder. In the control system for reducing the constant-speed cruising speed fluctuations of the electric automobile provided by the invention, the active damping control unit is used to receive actual rotation speed information and calculate compensation information and then transmit the compensation information to the proportional integral controller; and the proportional integral controller is used to calculate a received rotation speed commend and the actual rotation speed information so as to obtain a speed deviation, generate motor torque information after adjusting the speed deviation, calculate the motor torque information and the received compensation information to obtain a motor torque command, and then transmit the motor torque command to the motor operation model. On one side, the proportional integral controller takes the rotation speed deviation as output. On the other side, the active damping control unit will vary according to the different rotation speed deviations, wherein when a rotation speed overshoots obviously, the active damping control unit will adjust the rotation speed so as to reduce fluctuation degree of an automobile speed and enhance comfort.
Description
technical field [0001] The invention relates to speed adjustment technology, in particular to a control system and method for reducing fluctuations in constant speed cruising speed of an electric vehicle. Background technique [0002] When the electric vehicle is running in the cruise control mode, the driver of the electric vehicle is essentially in the speed closed-loop operation mode, and the speed loop controller is generally a PI controller. When the vehicle resistance changes, the PI controller will have overshoot. cause speed fluctuations. Therefore, in the case of unequal road surface resistance changes, there will be a large number of adjustment processes in the PI controller, resulting in large fluctuations in vehicle speed and affecting ride comfort. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a control system and method for reducing fluctuations in constant-speed cruising speed of electric vehicl...
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Login to View More IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 陈桂港令狐云波林国军
Owner SHENZHEN BUSBAR SCI TECH DEV