Control method and system of magnetic suspension bearing

By combining sliding mode enhanced active disturbance rejection control with an external integral compensator, the integral saturation and stability problems of magnetic levitation bearings under low-frequency basic excitation are solved, achieving high-performance control and simplifying engineering implementation.

CN122284416APending Publication Date: 2026-06-26HANGZHOU DIANZI UNIV
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Patent Information

Application Number
CN202610346858.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-20
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing magnetic levitation bearing control methods suffer from integral saturation, poor stability, and high dependence on sensors under low-frequency basic excitation environments, making it difficult to achieve high-performance control.

Method used

The sliding mode enhanced active disturbance rejection control (SM-ADRC) combined with an external integral compensator is adopted. The main loop is constructed by a piecewise fal function tracking differentiator, a model-aided fourth-order linear extended state observer and an integral sliding mode controller, and the external integral compensator is connected in parallel to generate electromagnetic force control commands.

Benefits of technology

It effectively suppresses low-frequency fundamental excitation, avoids integral saturation, improves system stability and control accuracy, simplifies engineering implementation, and reduces dependence on sensors.

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Abstract

The invention belongs to the technical field of magnetic suspension bearings, and particularly relates to a control method and system of a magnetic suspension bearing. Through the combination of auxiliary four-order LESO and integral sliding mode control, the anti-interference capability is greatly improved, and the suppression effect on various interferences is better than that of traditional control; a saturation function and an external integrator are adopted, so that the problems of buffeting control and integral saturation are solved; by means of the design of segmented fal function TD and the like, dynamic and steady-state performance is considered, zero-static-error suspension is achieved, and the adjusting time is greatly shortened; according to the control mode, core parameters are designed in an associated manner, complex setting is not needed, existing hardware can be compatible and directly embedded into a controller, and engineering implementation is simpler and more convenient.
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