Active vibration suppression for flexible satellites using a novel component synthesis method |
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Authors: | Liang Zhang Shijie Xu Zhiping Zhang Naigang Cui |
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Institution: | 1. Sun Yat-sen University, Guangzhou 510275, China;2. Beijing Institute of Space Long March Vehicle, Beijing 100076, China;3. Harbin Institute of Technology, Harbin 150001, China |
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Abstract: | This paper is devoted to developing a closed-loop vibration suppression controller for a satellite with large flexible appendages based on component synthesis vibration suppression (CSVS) method. The dynamics model of a flexible satellite is firstly established by using the Newton–Euler methodology, and the dynamics model of the flywheel is also developed. A novel CSVS method is presented based on zero-vibration differentiator (ZVD), which can guarantee multi-order vibration suppression. Combined with the proposed CSVS method, traditional closed-loop controllers such as PD or sliding mode controllers can be applied to active vibration suppression. The stability of the proposed closed-loop CSVS controller is proved by the Lyapunov theory. Subsequently, the dynamic optimal control allocation algorithm is proposed for six flywheels, and a novel nonsingular fast terminal sliding mode controller is developed to obtain practical voltage control input for the flywheel drive control system. Finally, numerical simulations are carried out to validate the effectiveness of the proposed method. |
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Keywords: | Flexible satellite Component synthesis vibration suppression Dynamic optimal control allocation Sliding mode control |
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