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Asynchronous motor command filtering fuzzy control method based on state constraints

An asynchronous motor and state-constrained technology, applied in motor control, motor generator control, electronic commutation motor control, etc., can solve problems such as computational explosion

Active Publication Date: 2019-10-15
QINGDAO UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to propose a fuzzy control method for command filtering of asynchronous motors based on state constraints, to overcome the calculation explosion problem caused by traditional backstepping methods, and to ensure that the state quantities of the asynchronous motor drive system are within a given state interval

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  • Asynchronous motor command filtering fuzzy control method based on state constraints
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  • Asynchronous motor command filtering fuzzy control method based on state constraints

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Embodiment Construction

[0147] Basic thought of the present invention is:

[0148] The fuzzy logic system is used to approach the nonlinear terms in the asynchronous motor drive system, and the barrier Lyapunov function is used to constrain the rotor angular velocity and stator current of the asynchronous motor drive system within a given state interval.

[0149] At the same time, the command filtering technology is introduced to overcome the "computational explosion" problem that cannot be avoided in the traditional backstepping method, and the filtering error compensation mechanism is introduced to eliminate the influence of filtering errors, and a command filtering fuzzy position tracking controller is constructed.

[0150] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0151] Such as figure 1 As shown, the command filter fuzzy control method of asynchronous motor based on state constraints, the components used includ...

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Abstract

The invention discloses an asynchronous motor command filtering fuzzy control method based on state constraints. An obstacle Lyapunov function is constructed to ensure that the rotor angular velocity,stator current and other state variables of an asynchronous motor drive system are always within a given state interval. A command filtering technology is introduced to overcome the 'computation explosion' problem which cannot be avoided by the traditional back-stepping method, and a filtering error compensation mechanism is introduced to eliminate the influence of filtering error. A fuzzy logicsystem is adopted to approximate a nonlinear term in the system, and a command filtering fuzzy controller is constructed. In addition, a more accurate model is used in view of the iron loss of the asynchronous motor. The simulation results show that the method not only can achieve an ideal position tracking effect, but also can avoid safety problems caused by the violation of state constraints byconstraining the rotor angular speed, stator current and other state variables within a given constraint interval.

Description

technical field [0001] The invention belongs to the technical field of position tracking control of asynchronous motors, in particular to a fuzzy control method for order filtering of asynchronous motors based on state constraints considering iron loss. Background technique [0002] Asynchronous motors are widely used in industry, agriculture, aerospace and other fields because of their advantages of low cost, simple structure, high reliability and durability. The mathematical model of asynchronous motor has the characteristics of high-order nonlinearity and time-varying parameters, and the traditional vector control and direct torque control methods are difficult to obtain a good dynamic response. In recent years, advanced control methods such as adaptive control, fuzzy control and backstepping control have been widely used in the research of related problems of asynchronous motor drive system. Among them, the adaptive control method based on fuzzy logic can be used to app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/22H02P21/18
CPCH02P21/001H02P21/18H02P21/22H02P2205/01
Inventor 于金鹏马玉梅吕振祥刘占杰胡成江赵林程帅
Owner QINGDAO UNIV
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