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Composite anti-disturbance controller for magnetically suspended control moment gyro subject to mismatched disturbances

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Abstract

To achieve the high-precision control for the hybrid magnetic bearing system in the magnetically suspended control moment gyro under voltage-controlled mode, this paper proposes a composite control approach combining robust control and a state-space disturbance observer. To handle the multiple disturbances, the hierarchical idea is used. The external disturbances are estimated and rejected by a state-space disturbance observer, while the norm-bounded uncertainties are attenuated by robust \({H_\infty }\) strategy. On the other hand, to counteract the input-mismatched disturbances in the voltage-controlled mode, different equilibrium points are designed for various state variables. That is, the mismatched influence is transferred to the state variable that is not paid much attention. The proposed method exhibits the attractive advantage that it retains the baseline robust controller performance. The effectiveness and superiority of the proposed control method are demonstrated by both simulations and experiments.

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Acknowledgments

The work was supported by the National Basic Research Program (973 Program) of China under Grant 2009CB72400101C, the Innovative Research Groups of National Natural Science Foundation of China under Grant 61121003, and the Pre-research Foundation for Civil Aerospace of China.

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Authors and Affiliations

  1. Key Laboratory of Fundamental Science for National Defense, School of Instrumentation Science and Opto-Electronics Engineering, BeiHang University, Beijing, 100191, China

    Cong Peng, Jiancheng Fang & Sheng Xu

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  1. Cong Peng
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  2. Jiancheng Fang
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  3. Sheng Xu
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Correspondence to Cong Peng.

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Peng, C., Fang, J. & Xu, S. Composite anti-disturbance controller for magnetically suspended control moment gyro subject to mismatched disturbances. Nonlinear Dyn 79, 1563–1573 (2015). https://doi.org/10.1007/s11071-014-1760-z

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  • DOI: https://doi.org/10.1007/s11071-014-1760-z

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