Transactions of China Electrotechnical Society  2017, Vol. 32 Issue (23): 100-114    DOI: 10.19595/j.cnki.1000-6753.tces.161866
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Two-Degree-of-Freedom Control for Active Magnetic Bearing Flywheel Rotor System Based on Inverse System Decoupling
Chen Liangliang1,2, Zhu Changsheng1, Wang Zhongbo1
1.College of Electrical Engineering Zhejiang University Hangzhou 310027 China;
2. College of Information EngineeringNanchang Hangkong UniversityNanchang 330063China

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Abstract  

For the vibration suppression of active magnetic bearing (AMB) high-speed flywheel rotor system, a control strategy based on inverse system decoupling and improved two-degree-of-freedom (2DOF) control was proposed in this paper. The AMB flywheelrotor system was decoupled by the inverse system method firstly, so that the AMB flywheelrotor system, which was a nonlinear, strong coupling system, was decoupled into four independent subsystems. Then, the decoupled subsystems were adjusted by the improved 2DOF controller, which can regulate the performances of set-point tracking and disturbance rejection, respectively. In the improved 2DOF controller, the damping control signal was obtained by velocity estimator, so that the ability of against noise can be improved. The stability, set-point tracking and robustness of control strategyproposed were analyzed in theory, and its ability and effectiveness to control the vibration of AMB high-speed flywheel rotor system were further investigated by simulations and experiments. It is shown that the control strategy proposed can stably suspend the AMB high-speed flywheel rotor systemand effectively suppress its vibrations, with the advantages of highstability, strong robustness, and good ability of against noise.

Key wordsActive magnetic bearing (AMB)      flywheel energy storage      inverse system method      velocity estimator      two-degree-of-freedom control     
Received: 28 November 2016      Published: 22 December 2017
PACS: TM355  
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Chen Liangliang
Zhu Changsheng
Wang Zhongbo
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Chen Liangliang,Zhu Changsheng,Wang Zhongbo. Two-Degree-of-Freedom Control for Active Magnetic Bearing Flywheel Rotor System Based on Inverse System Decoupling[J]. Transactions of China Electrotechnical Society, 2017, 32(23): 100-114.
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