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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2020, Vol. 41 ›› Issue (S1): 723778-723778.doi: 10.7527/S1000-6893.2019.23778

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Fault identification of actuators and sensors of satellite attitude control systems based on deep forest algorithm

CHENG Yuehua1, JIANG Wenjian1, YANG Hao1, XUE Qi1, LIAO He2   

  1. 1. School of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China;
    2. School of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2019-12-13 Revised:2019-12-26 Online:2020-06-30 Published:2020-01-02
  • Supported by:
    National Key R&D Program of China (2016YFB0500803); Equipment Pre-research National Defense Science Technology Key Laboratory Foundation under Grant (1422080307)

Abstract: The difficulty in identifying the faulted sensors and actuators of satellite Attitude Control Systems (ACS) resides in the spreading of faults in the closed loop. The deep forest algorithm is introduced in this study to build a fault prediction model to achieve the isolation of the sensor faults and actuator faults. After collecting healthy ACS telemetry data to group a training set according to the dynamic characteristics of ACS, we apply appropriate feature selection and extraction methods to the training set, obtaining the features of both the sensor faults and actuator faults. The deep forest algorithm, with its strong generalization ability, is then used to learn and identify fault information, thereby establishing a fault prediction model to realize the recognition of actuator and sensor faults. The results of the semi-physical simulation indicate that the proposed method can identify the faults of sensors and actuators effectively in the presence of many uncertain factors, such as the interference moments of air bearing testbeds, unknown moments of the inertia of satellites, nonlinear characteristics of flywheels and fault propagation in the closed loop of ACS.

Key words: deep forest algorithm, satellite attitude control systems, actuators, sensors, fault identification

CLC Number: