A Construction Method of AC Magnetic Bearing Fault-Tolerant Decoupling Controller

Abstract

The invention relates to a construction method of an alternating-current magnetic bearing fault-tolerant decoupling controller. The construction method includes the following steps of firstly, constructing a controlled composite object; secondly, constructing a support vector machine inverse model base; thirdly, selecting a support vector machine inverse model in the support vector machine inverse model base to be used as the support vector machine inverse model for the controlled composite object, enabling the inverse system function of the controlled composite object to be achieved, setting up a pseudo linear system before enabling the support vector machine inverse model base to be connected to the controlled composite object in series, and decoupling the pseudo linear system into two second-order integral type displacement linear subsystems in a linearization mode; fourthly, designing two radial position controllers for the two second-order integral type displacement linear subsystems respectively to constitute a linear closed loop controller; fifthly, enabling the linear closed loop controller and the support vector machine inverse model base to constitute the support vector machine inverse fault-tolerant decoupling controller together, and conducting fault-tolerant decoupling control on the controlled composite object.

Description

technical field [0001] The invention relates to a construction method of an AC magnetic bearing fault-tolerant decoupling controller, which is suitable for high-performance and high-reliability control of an AC radial active magnetic bearing system, and belongs to the technical field of special electric transmission (especially magnetic suspension transmission). Background technique [0002] In order to adapt to the development trend of modern equipment and advanced manufacturing industry towards high efficiency, high speed, high precision, intelligence, low power consumption and green manufacturing, the magnetic bearings used in the field are required to have small size, simple structure, low power consumption and low cost. low and high reliability. AC radial active magnetic bearings are based on AC excitation. Only a single three-phase CRPWM power inverter can be used to achieve radial two-degree-of-freedom suspension control, and the three-phase CRPWM inverter technology ...

AI Technical Summary

Problems solved by technology

However, the traditional support vector machine inverse control method can only achieve decoupling linearization when the system is running normally, but it is powerless when the system fails.

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