Three-degree-of-freedom six-pole hybrid magnetic bearing rotor displacement self-detection system and method

Abstract

The invention discloses a three-degree-of-freedom six-pole hybrid magnetic bearing rotor displacement self-detection system and method. The three-degree-of-freedom six-pole hybrid magnetic bearing rotor displacement self-detection system is composed of a fuzzy support vector machine displacement prediction module, a linear closed-loop controller and a force / current conversion module which are sequentially connected in series at the output end and the input end of a composite controlled object; each of two fuzzy support vector machine radial displacement prediction modules and a fuzzy support vector machine axial displacement prediction module is composed of a training sample set module, a data preprocessing module, a fuzzy data module, an optimal performance parameter determination moduleand a fuzzy support vector machine module, wherein the fuzzy data module assigns different membership values to samples with different importance degrees; the fuzzy membership values are calculated byadopting a kernel fuzzy clustering algorithm; the optimal penalty parameter and the core width are determined by the optimal performance parameter determination module by adopting a simplified particle swarm optimization algorithm; and a fuzzy support vector machine training module calculates the predicted displacement, the axial dimension of the magnetic bearing is reduced, and the dynamic performance of the system is improved.

Description

technical field [0001] The invention relates to the control technology of the three-degree-of-freedom six-pole radial-axial hybrid magnetic bearing, specifically the rotor displacement self-detection technology based on the simplified particle swarm algorithm optimization fuzzy support vector machine, which belongs to the field of high-speed and ultra-high-speed motor transmission and is widely used In aerospace, vacuum technology, machinery industry and energy transportation and other fields. Background technique [0002] Magnetic suspension bearing (abbreviated as magnetic bearing) is a new type of high-performance bearing that uses the current in the coil or the permanent magnet to generate electromagnetic force to suspend the rotor in space without any mechanical contact between the rotor and the stator. Because the magnetic bearing has the advantages of no friction, no loss, no lubrication and sealing, high supporting speed, high rotation accuracy, no pollution, long se...

AI Technical Summary

Problems solved by technology

In traditional support vector machines, each input sample has the same importance, but due to the different loss function values ​​of different samples, the contribution of empirical risk is also different

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