Construction method for five-degree-of-freedom alternative current active magnetic bearing support vector machine decoupling controller

Abstract

The invention discloses a construction method for a five-degree-of-freedom alternative current active magnetic bearing support vector machine decoupling controller. The method comprises the following steps of: serially connecting a current tracking inverter and a bipolar switch power amplifier to the front side of a five-degree-of-freedom alternative current active magnetic bearing respectively to form a composite controlled object; constructing a support vector machine alphath-order invertible system by using five support vector machine second-order systems and ten integrators s<-1>; practicing the support vector machine alphath-order invertible system off line to realize a composite controlled object invertible system; serially connecting the support vector machine alphath-order invertible system to the front side of the composite controlled object to form a pseudo-linear system; designing four radial direction controllers and one axial direction controller for five position second-order integral type pseudo-linear subsystems respectively to form a linear closed loop controller; serially connecting the linear closed loop controller to the front side of the support vector machinealphath-order invertible system and constructing the five-degree-of-freedom alternative current active magnetic bearing support vector machine decoupling controller together with the composite controlled object; therefore, higher controlling capacity and higher load disturbance resisting capacity can be acquired by a system.

Description

technical field [0001] The invention is a construction method of a five-degree-of-freedom AC magnetic bearing support vector machine decoupling controller, which belongs to the field of high-speed and ultra-high-speed electric transmission, provides conditions for realizing the high-efficiency control of five-degree-of-freedom AC magnetic bearings, and is suitable for high performance Machine tool spindles, generators and centrifugal pumps, etc. Background technique [0002] Magnetic bearings (Active Magnetic Bearings) have many outstanding advantages such as no friction and wear, no lubrication, high speed, high precision, long life, etc. It uses magnetic field force to suspend the rotor in the air without contact, and the suspension position can be controlled by the control system A new type of bearing has fundamentally changed the traditional support form. In particular, the AC magnetic bearing can use an AC three-phase power inverter to provide control current to the co...

AI Technical Summary

Problems solved by technology

The commonly used decoupling control methods include approximate linearization decoupling method, differential geometric feedback linearization decoupling method, analytical inverse system method, neural network inverse, etc. Among them, approximate linearization decoupling method can only achieve static decoupling of the system, but cannot Realize the dynamic decoupling of the system; while the rotor parameters of the magnetic bearing change significantly with the working conditions, coupled with the change of the suspension force when the rotor is eccentric and the existence of load disturbance, it is difficult for the differential geometric control method and the analytical inverse system method to be used in practice. Real application; the neural network inverse decoupling control can realize the dynamic decoupling of the system when the analytical inverse is difficult to obtain, and obtain excellent static and dynamic characteristics, but the neural network still has slow learning speed and training problems in theory and design methods Insurmountable defects such as long time, difficulty in extracting ideal samples, difficulty in optimizing network structure, etc.

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