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As an ultra-static and ultra-stable platform for space gravitational wave detection, the drag-free satellite works in a complex deep space environment and is subject to many disturbances. In this paper, a fault estimation method based on adaptive sliding mode observer is proposed for actuator fault estimation in drag-free satellite system. The designed observer can estimate the fault size timely and accurately for the possible time-varying fault, intermittent fault, constant fault and other fault forms of the actuator, and has strong robustness. Finally, the effectiveness of the method has been validated through numerical simulation.

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Fault Detection and Estimation for Drag-Free Satellite Actuator Based on Adaptive Sliding Mode Observer

  • 会议论文

  • 发表日期：

    2025年

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  • Jikun Yang,
  • Zhenkun Lu,
  • Zhanxiu Wang,
  • Lei Wang,
  • Zhaofeng Chen,
  • Ziyao Cheng,
  • Zongming Li

摘要

As an ultra-static and ultra-stable platform for space gravitational wave detection, the drag-free satellite works in a complex deep space environment and is subject to many disturbances. In this paper, a fault estimation method based on adaptive sliding mode observer is proposed for actuator fault estimation in drag-free satellite system. The designed observer can estimate the fault size timely and accurately for the possible time-varying fault, intermittent fault, constant fault and other fault forms of the actuator, and has strong robustness. Finally, the effectiveness of the method has been validated through numerical simulation.