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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (7): 2350-2360.doi: 10.7527/S1000-6893.2015.0009

• Electronics and Control • Previous Articles     Next Articles

Fast fault diagnosis of multi-effectors aircraft with control surface damage

WANG Fawei1,2, DONG Xinmin1, CHEN Yong1, WANG Xiaoping1, LIAO Kaijun2   

  1. 1. Aeronautics and Astronautics Engineering College, Air Force Engineering University, Xi'an 710038, China;
    2. Department of Aeronautic Instrument Electrical Engineering, First Aeronautical College of Air Force, Xinyang 464000, China
  • Received:2014-05-29 Revised:2015-01-07 Online:2015-07-15 Published:2015-03-20
  • Supported by:

    National Natural Science Foundation of China (61304120)

Abstract:

An adaptive compensation observer is presented for fast fault diagnosis of multi-effectors aircraft in the presence of control surface damage, which directly estimates the deflection angles of control surfaces. Firstly, an augmented observer is designed for the estimation of system input and an adaptive compensation is introduced to improve the dynamic tracking performance of observer. Secondly, new adaptive thresholds are designed for the fast fault detection and reduction of the false alarm rate. Finally, the actuator fault feature of control surface is employed to reset the initial conditions. The limited memory least square method is developed to achieve a real-time estimation of mutation parameters, which is applied for fault isolation. Simulation results suggest that in different cases of actuator faults of control surface damage, the proposed observer methods can achieve fault alarm within 20 ms and determine the fault location in 0.22 s. Furthermore, the identification method can accurately estimate the degree of damaging within 0.2 s after fault alarm.

Key words: multi-effectors aircraft, control surface damage, fault diagnosis, adaptive threshold, parameter estimation

CLC Number: