Fault Detection of Flight Control System Based on H∞ / H_ Nonlinear Filter

As for the coupling between modeling error and fault information. Applying to control surfaces and actuator, the method of H
_∞
/ H
_{_}
robust fault detection is deeply researched, a residuals isolation method based on adaptive threshold is given. The simulation results show that the method is fast and effective for non-linear robust fault diagnosis, it can achieve the sensitivity between residuals and fault and the robust between residuals and noise. The adaptive threshold depress the rate of false alarm in residuals isolation and enhance the robustness.