Sliding mode robust control of a bearingless induction motor suspension system based on the HJI theory

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (4) : 50-55.

SUN Yuxin，TANG Jingwei，ZHU Huangqiu，SHI Kai

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Abstract

To realize the dynamic decoupling control of a bearingless induction motor suspension system,a sliding mode robust control method based on the HJI (Hamilton-Jaeobi-Issaes) theory for a bearingless induction motor suspension system was proposed.In modeling the suspension system,the system uncertainty and the external disturbance were considered,and the stability of the control system was ensured by satisfying the HJI inequality robust condition by designing an appropriate sliding mode control law.Finally,the method realizes the dynamic decoupling control of the bearingless induction motor suspension system and improves the stability and anti-disturbance performance of the system.Simulation and experimental results show the effectiveness of the method,which can realize the decoupling control of two degrees of freedom bearingless motor.

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bearingless induction motor / suspension system / decoupling control / Hamilton-Jacobi-Isaacs inequality / sliding mode robust control

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SUN Yuxin，TANG Jingwei，ZHU Huangqiu，SHI Kai. Sliding mode robust control of a bearingless induction motor suspension system based on the HJI theory[J]. Journal of Vibration and Shock, 2019, 38(4): 50-55

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