Active control method for low-frequency vibration of electric drive system

A technology of electric transmission and low-frequency vibration, which is applied in the direction of suppressing motor vibration control, non-electric variable control, mechanical oscillation control, etc., and can solve problems such as difficult to obtain sliding plane parameters and boundary layer thickness

Active Publication Date: 2014-04-23
BEIHUA UNIV +3
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Problems solved by technology

[0005] Variable structure control method, as a commonly used nonlinear control method, has good robustness for complex strongly coupled systems, but its main defect is that the sliding plane is designed with pole configur

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  • Active control method for low-frequency vibration of electric drive system
  • Active control method for low-frequency vibration of electric drive system
  • Active control method for low-frequency vibration of electric drive system

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Embodiment Construction

[0030] An active control method for low-frequency vibration of an electric transmission system according to the present invention will be described in detail below using the drawings and embodiments.

[0031] refer to figure 1 , an active control method for low-frequency vibration of an electric drive system, comprising the steps of:

[0032] 1) Determine the control scheme: the electric transmission system is mainly the passive support of the motor. There will be different support forms and support points due to different motor models. An executive component is arranged on each support point of the motor, and each executive component is controlled in real time. To adjust the attenuation of the acceleration generated by the self-excited vibration of the motor, thus indirectly attenuating the transmission of the dynamic load of the motor to the electric drive system; When there is an alternating current in the coil of the actuator, the electromagnetic action will generate an e...

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Abstract

The invention discloses an active control method for low-frequency vibration of an electric drive system. The active control method is characterized by comprising the following steps: determining a control scheme, measuring the rotating speed or acceleration of a motor according to the low-frequency vibration characteristic of the electric drive system, and designing an active control strategy; selecting a control algorithm, comparing the characteristics and current application statuses of various intelligent control algorithms, and determining a sliding mode variable structure control algorithm; defining a variable structure switching function, designing a variable structure control rate, exploring a key problem in the application of the sliding mode variable structure algorithm, namely, the root cause of vibration, and reasonably designing a switching function and a control rate; optimizing a switching function parameter according to a genetic algorithm, and applying a genetic algorithm thought to the optimization of the switching function parameter of a sliding mode variable structure in order to further eliminate vibration caused by sliding mode switching; determining a braking torque, and tracking a vibration signal through a controller to provide a brake torque for realizing active control on the low-frequency vibration of the electric drive system. The active control method has the advantages of good control effect, high adaptability and the like.

Description

technical field [0001] The patent of the present invention relates to the field of low-frequency vibration control of electric transmission system. The invention applies an active control method for low-frequency vibration of electric transmission system to realize the control of low-frequency vibration of electric transmission system. This method can be used to reduce low-frequency vibration and vibration of electric transmission system. Noise, improve system stability. Background technique [0002] Vibration is a common phenomenon in the operation of all electrical equipment. In the electrical transmission system, the motor, like other equipment, will vibrate to varying degrees during operation. The harm of vibration to the electrical transmission system is mainly manifested in the following aspects Aspects: increase energy consumption, reduce the efficiency of the power system; directly damage the motor bearings, accelerate the wear of the motor bearings, and greatly shor...

Claims

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Application Information

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IPC IPC(8): H02P23/04G05D19/02
Inventor 邢砾云葛玉敏
Owner BEIHUA UNIV
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