Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (11): 3792-3799.doi: 10.12305/j.issn.1001-506X.2024.11.21

• Systems Engineering • Previous Articles     Next Articles

Fault diagnosis method of air data sensor based on double-model adaptive estimation

Yingfei XIAO1,*, Haiying LIU1,2, Yuehua CHENG3, Tiexiang LI2,4   

  1. 1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
    2. Nanjing Center for Applied Mathematics, Nanjing 211135, China
    3. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
    4. School of Mathematics, Southeast University, Nanjing 211189, China
  • Received:2023-05-17 Online:2024-10-28 Published:2024-11-30
  • Contact: Yingfei XIAO

Abstract:

Atmospheric turbulence is an irregular random motion in the atmosphere. During the measurement of airborne air data sensors, atmospheric turbulence effects and sensor faults are coupled with each other, leading to the inability of air data sensor fault diagnosis algorithms to decouple faults from turbulence effects. In view of the fault diagnosis problem of air data sensors under the effects of atmospheric turbulence, a new atmospheric system model and measurement model are developed based on inertial measurement units and navigation attitude solving, considering the effects of turbulence on the atmospheric system. After extending the double-model adaptive estimation algorithm, the covariance adaptive update of the effect of turbulence on the system is introduced to achieve an unbiased estimation of the fault state in the presence of unknown disturbances. Simulation results show that the algorithm can effectively achieve diagnosis of fixed deviation faults, drift deviation faults, and oscillation faults.

Key words: air data sensor fault diagnosis, atmospheric turbulence, double-model adaptive estimation, fault detection and diagnosis

CLC Number: 

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