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A fuzzy discrete control method for asynchronous motors based on command filtering

An asynchronous motor, discrete control technology, used in motor control, motor generator control, AC motor control and other directions, can solve problems such as computational explosion

Active Publication Date: 2019-05-14
QINGDAO UNIV
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  • Abstract
  • Description
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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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  • A fuzzy discrete control method for asynchronous motors based on command filtering
  • A fuzzy discrete control method for asynchronous motors based on command filtering
  • A fuzzy discrete control method for asynchronous motors based on command filtering

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Embodiment Construction

[0096] The basic idea of ​​the present invention is: use the Euler method to obtain the discrete model of the asynchronous motor, at the same time use the fuzzy logic system to approach the highly nonlinear function in the system, and combine the adaptive and backstepping technology to construct the controller, and introduce the command filtering technology into the In the selection of the Lyapunov function in the recursive process and the construction of the intermediate virtual control signal, the control law is recursively obtained, and at the same time, the corresponding adaptive law is designed to adjust the unknown parameters; the command filtering technology is introduced to generate The differential signal of the filtered signal reduces the amount of calculation and solves the "computational explosion" problem caused by the continuous derivation of the virtual control function by the traditional backstepping method; the introduction of dynamic surface technology greatly ...

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Abstract

The invention discloses an asynchronous motor fuzzy discretization control method based on command filtering. Aiming at the nonlinear problem existing in the asynchronous motor drive and control system, this method introduces command filtering technology in a traditional back-stepping design method and successfully overcomes the problem of computational explosion arising from the continuous derivation in the traditional back-stepping control. The method uses a fuzzy logic system to approximate the non-linear function in the motor drive system, and combines the command filtering technology with an adaptive method to construct a controller. After the adjustment of the method, the motor operation can reach a steady state quickly; and the simulation result shows that the method of the present invention can overcome the influences of inaccurate parameters and helps to ensure a desired control effect, achieving a fast and stable response to the rotation speed.

Description

technical field [0001] The invention belongs to the technical field of position tracking control of asynchronous motors, in particular to a fuzzy discrete control method for asynchronous motors based on command filtering. Background technique [0002] Induction motors (IMs) are AC motors, also called induction motors, which are mainly used as motors. Asynchronous motors are widely used in industrial and agricultural production, such as machine tools, water pumps, metallurgy, mining equipment and light industrial machinery, etc., all use it as a prime mover, and its capacity ranges from several kilowatts to several thousand kilowatts. The increasingly popular household appliances, such as washing machines, fans, refrigerators, and air conditioners, use one-way asynchronous motors with a capacity ranging from several watts to several kilowatts. In aerospace, computer and other high-tech fields. Asynchronous motors can also be used as generators, such as small hydropower stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/06H02P21/13H02P21/00H02P27/08
CPCH02P21/001H02P21/0017H02P21/06H02P21/13H02P27/08H02P2203/05H02P2207/01
Inventor 于金鹏马玉梅于海生周真诚牛浩
Owner QINGDAO UNIV
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