Bearing-free asynchronous motor suspension system fault-tolerant controller and construction method thereof

Abstract

The invention discloses a bearing-free asynchronous motor suspension system fault-tolerant controller and a construction method of the bearing-free asynchronous motor suspension system fault-tolerant controller. A support vector machine and an integrator corresponding to the support vector machine are used for constructing a normal inverse model and a fault inverse model of a composite controlled object respectively and form an inverse model base. The inverse models in the inverse model base are used as inverse models of the composite controlled object, corresponding vector coefficients and threshold values of the support vector machine are adjusted and determined to enable the inverse model base to have the inverse system function. The inverse model base and the composite controlled object are connected in series to obtain a fake linear system. The fake linear system is decoupled into two two-order single-input single-output displacement linear sub systems, and two additional controllers are introduced into the two two-order displacement linear sub systems respectively to construct a linear closed-loop controller. The linear closed-loop controller and the inverse model base collectively form a support vector machine inverse fault-tolerant controller. In the situation of normal operation and operation with faults, nonlinear decoupling control of a bearing-free asynchronous motor suspension system is achieved, and good fault tolerance and robustness are achieved.

Description

technical field [0001] The invention belongs to the technical field of special electric transmission, in particular to a fault-tolerant controller of a suspension system of a bearingless asynchronous motor, and is a fault-tolerant controller of a suspension system of a bearingless asynchronous motor based on the inverse model of a double support vector machine. Background technique [0002] Bearingless asynchronous motor is a new type of special motor that organically combines magnetic levitation technology with traditional asynchronous motor. It has the advantages of both asynchronous motor and magnetic bearing. problems such as wear and noise. Bearingless asynchronous motors can meet the requirements of modern industry, medicine, military and other special fields for (ultra) high-speed, friction-free, wear-free, lubrication-free and maintenance-free high-performance special power transmission systems. However, with the application of bearingless asynchronous motors in the...

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Problems solved by technology

However, this method can only realize the decoupling control of the system under normal conditions, but it cannot complete the decoupling control when the system operates with faults. Therefore, it is necessary to seek an extended form or method of support vector machine inversion to realize nonlinear systems, such as Decoupling control of bearingless asynchronous motor suspension system under normal and fault conditions

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