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Input saturation considered asynchronous motor command filter finite time fuzzy control method

An asynchronous motor, fuzzy control technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve problems such as computational explosion

Active Publication Date: 2017-05-31
QINGDAO UNIV
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Problems solved by technology

However, the continuous derivation of the virtual control function in the traditional backstepping control is easy to cause the problem of "computational explosion"

Method used

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  • Input saturation considered asynchronous motor command filter finite time fuzzy control method
  • Input saturation considered asynchronous motor command filter finite time fuzzy control method
  • Input saturation considered asynchronous motor command filter finite time fuzzy control method

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Embodiment Construction

[0143] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0144] to combine figure 1 As shown, the asynchronous motor command filtering finite-time fuzzy control method considering input saturation mainly includes asynchronous motor command filtering finite-time fuzzy controller 1 considering input saturation, coordinate transformation unit 2, SVPWM inverter 3 and speed The detection unit 4 and the current detection unit 5 .

[0145] Among them, the speed detection unit 4 and the current detection unit 5 are mainly used to detect the current value and speed-related variables of the asynchronous motor. The actual measured current and speed variables are used as input, and the finite-time fuzzy controller is filtered by considering the input saturation of the asynchronous motor command 1 Carry out voltage control, and finally convert to three-phase electric control of the speed of the asynchronous motor...

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Abstract

The invention discloses an input saturation considered asynchronous motor command filter finite time fuzzy control method. Aiming at nonlinear problems of a motor driving and control system, a fuzzy logic system is adopted for approximation to a nonlinear function in the system, a command filter technique is introduced into a traditional backstepping design method, errors generated in filtering are reduced through introduction of a compensation mechanism, the problem of computation explosion caused by continuous derivation in traditional backstepping control is successfully solved, and control precision is improved. Small system stable tracking errors and short dynamic responding time under finite time control are realized, system convergence rate is increased, and interference rejection capability is improved. Under the condition of consideration of input saturation, bounded parameters of a closed-loop system can be guaranteed, and convergence of tracking errors of the system into a sufficiently small origin neighborhood in finite time can be guaranteed as well.

Description

technical field [0001] The invention belongs to the technical field of motor speed regulation control, and in particular relates to a command filtering finite-time fuzzy control method of an asynchronous motor considering input saturation. Background technique [0002] In the technical innovation of industrial development, motor drive plays an extremely important role, because the future drive method must have stronger stability and better control effects. Asynchronous motors are widely used in industrial production due to their advantages of low cost, simple structure, high reliability and durability. However, the dynamic model of the asynchronous motor is a high-order nonlinear strongly coupled system, how to realize the effective control of the asynchronous motor is a difficult problem. In order to meet the requirements of practical application, control strategies based on modern control theory such as fuzzy logic control, backstepping control and sliding mode control ar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/00
CPCH02P23/0013
Inventor 于金鹏马玉梅于海生赵林韩瑶牛浩
Owner QINGDAO UNIV
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