Neural network prediction decoupling controller for five-degree-of-freedom bearingless permanent magnet synchronous generator

Abstract

The invention discloses a five-degree-of-freedom bearingless permanent magnet synchronous generator neural network prediction decoupling controller, which is characterized in that the input end of a fuzzy neural network system is respectively connected with two neural network dynamic prediction modules in series, and the output end of the fuzzy neural network system is connected with a composite controlled object comprising a five-degree-of-freedom bearingless permanent magnet synchronous generator; the first neural network dynamic prediction module outputs a composite control quantity ja at the t + 1 moment, and the second neural network dynamic prediction module outputs a composite control quantity jb and a power generation voltage control quantity at the t + 1 moment; the output of the fuzzy neural network system is a power generation winding reference voltage component, a rotor radial suspension force winding reference voltage component and a rotor axial displacement control voltage at the t + 1 moment; according to the method, the advantages of low sample requirement of fuzzy logic control and good dynamic performance of the neural network on system learning ability and prediction control are combined, various static and dynamic performance such as good rotor radial displacement and power generation voltage control can be obtained, and the control efficiency is improved.

Description

Technical field [0001] The present invention relates to a bearingless permanent magnet synchronous generator, in particular its predictive decoupling controller, suitable for nonlinear, multi-variable five degrees of freedom bearingless permanent magnet synchronous generator high-speed and high-precision control, widely used in electric vehicle flywheel energy storage system, aerospace, power generation and other fields Background [0002] Permanent magnet synchronous generators are not only small in size, low cost and reliable in operation, but also have the advantages of high efficiency, high power factor, fast response and wide power generation voltage range. Bearingless permanent magnet synchronous generator is the combination of bearingless technology and magnetic bearing technology with permanent magnet synchronous generator, that is, by adding an additional set of suspension force windings to make the permanent magnet synchronous generator rotor suspended, to avoid mechan...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the control technology of the existing five-degree-of-freedom bearingless permanent magnet synchronous generator, and propose a neural network predictive decoupling controller, which combines fuzzy logic control, neural network control and neural network predictive control Advantages, it can simply and reliably realize the decoupling control among the rotor radial levitation force, power generation voltage, magnetic bearing radial levitation force and axial levitation force of the five-degree-of-freedom bearingless permanent magnet synchronous generator

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