| Citation: | LI Lei, GAO Yongming, WU Zhihuan, et al. Small fault detection method for actuator of satellite attitude control system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(3): 529-537. doi: 10.13700/j.bh.1001-5965.2018.0372(in Chinese)
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Aimed at the problem of small fault detection for actuator of satellite attitude control system, a small fault detection method based on neural network disturbance observer is proposed. By using the redundant relationship in the satellite attitude control system, a gyro disturbance observer and disturbance torque observer are constructed to estimate the measurement error and disturbance torque in the system, and the fault detection observer is compensated for disturbances to improve actuator's small fault detection capability. The simulation results show that, compared with the analytical model based method, this method can compensate the error of the analytical model more accurately, reduce the detection threshold significantly, and realize the small fault detection for actuator under disturbance concealment.
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