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Fuzzy adaptive dynamic surface control method for asynchronous motor stochastic system

An asynchronous motor, dynamic surface control technology, used in motor control, motor generator control, electronically commutated motor control, etc.

Active Publication Date: 2019-11-01
QINGDAO UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to propose a fuzzy adaptive dynamic surface control method for asynchronous motor stochastic system based on dimensionality reduction observer, so as to solve the technical problem of asynchronous motor system position tracking control in consideration of random disturbance

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  • Fuzzy adaptive dynamic surface control method for asynchronous motor stochastic system
  • Fuzzy adaptive dynamic surface control method for asynchronous motor stochastic system
  • Fuzzy adaptive dynamic surface control method for asynchronous motor stochastic system

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Embodiment Construction

[0140] The basic idea of ​​the invention is as follows: using fuzzy logic system to approximate the unknown random nonlinear function in the stochastic system of asynchronous motor, at the same time based on Lyapunov function, using backstepping method to construct intermediate virtual control signal, and gradually recursively obtain the control law, so as to ensure voltage stability In a bounded area, the control error is reduced and the control accuracy is improved.

[0141] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0142] like figure 1 As shown, the fuzzy adaptive dynamic surface control method for stochastic systems of asynchronous motors based on dimension reduction observers mainly includes fuzzy adaptive dynamic surface fuzzy adaptive backstepping controllers for stochastic systems of asynchronous motors based on dimension reduction observers. , a coordinate transformation unit 2...

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Abstract

The invention discloses a fuzzy adaptive dynamic surface control method for an asynchronous motor stochastic system based on a reduced-dimensional observer. Aiming at the control precision requirements of asynchronous motor stochastic systems and the existing random disturbance and nonlinear problems, the method designs a fuzzy adaptive backstep controller to track a target position, and uses thefuzzy logic system to deal with the unknown stochastic nonlinearity in asynchronous motor system. The dynamic surface technology is introduced into a traditional backstep method to solve the problem of 'computation explosion' in the computing process, and a reduced-dimensional observer is constructed to estimate the rotor position and the rotor angular velocity of the asynchronous motor. The simulation results show that the method of the invention can quickly converge the tracking error to a sufficiently small neighborhood of the origin, and has the better anti-interference ability.

Description

technical field [0001] The invention belongs to the technical field of position tracking control of asynchronous motors, and in particular relates to a fuzzy self-adaptive dynamic surface control method for stochastic systems of asynchronous motors based on a dimensionality reduction observer. Background technique [0002] In recent years, asynchronous motors have been widely used in agriculture and industry due to their simple structure, high efficiency, long service life and strong practical applicability. However, the asynchronous motor system is a highly nonlinear, strongly coupled, and multivariable system, and in practical applications, the asynchronous motor system will be disturbed by some uncertain factors, such as uncertain parameters. In order to solve these problems, relevant scientific and technological workers have proposed some nonlinear control methods and achieved good results, such as backstepping control, sliding mode control, robust control and other adva...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/18H02P21/13
CPCH02P21/001H02P21/0017H02P21/13H02P21/18H02P2203/03
Inventor 于金鹏马玉梅赵恩亮胡成江程帅邹明峻
Owner QINGDAO UNIV
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