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The new type dissimilar redundant actuation system (NT-DRAS) can be used in high value near space vehicle (NSV) due to its advantages of flexible layout and high mission reliability with dissimilar redundancy. It can have different operation modes, in which the working channels from the current one to the other backup one can provide active fault tolerant control (AFTC) strategy, the switching criterion remains a problem for the NT-DRAS. This paper proposed a flight quality constraint based AFTC (FQC-AFTC) strategy for the NT-DRAS channel switching problem. The linear-quadratic (LQ) cost function is used as index form to evaluate the flight quality of the flight control model, both the NT-DRAS channel switching error threshold and fault tolerance response time are considered to derive a comprehensive LQ cost function index, and then the channel switching (AFTC) strategies are given based on the LQ cost function index under different conditions. Simulation analysis and studies are performed to verify the proposed FQC-AFTC effectiveness finally.

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Flight Quality Constraint Based AFTC Strategy for Near Space Vehicle with New Type Dissimilar Redundant Actuation System

  • 会议论文

  • 发表日期：

    2025年

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  • Jun Wang,
  • Jian Huang,
  • Fan Zhang,
  • Weikang Li

摘要

The new type dissimilar redundant actuation system (NT-DRAS) can be used in high value near space vehicle (NSV) due to its advantages of flexible layout and high mission reliability with dissimilar redundancy. It can have different operation modes, in which the working channels from the current one to the other backup one can provide active fault tolerant control (AFTC) strategy, the switching criterion remains a problem for the NT-DRAS. This paper proposed a flight quality constraint based AFTC (FQC-AFTC) strategy for the NT-DRAS channel switching problem. The linear-quadratic (LQ) cost function is used as index form to evaluate the flight quality of the flight control model, both the NT-DRAS channel switching error threshold and fault tolerance response time are considered to derive a comprehensive LQ cost function index, and then the channel switching (AFTC) strategies are given based on the LQ cost function index under different conditions. Simulation analysis and studies are performed to verify the proposed FQC-AFTC effectiveness finally.