Abstract:

The design of the flight controller that exploits the advantages of the nonlinear dynamic inversion, adaptive fuzzy system and slide model control is discussed. First,the nonlinear dynamic inversion theory is used to approximately linearize the nonlinear system. Then an adaptive fuzzy system is adopted to cancel the errors brought with approximate inversion, and the residual error is solved by slide model control. The weight adjustment law is got based on Lyapunov theory to assure the stability of the control system. The resulting control law is applied to the reconfigurable flight controller of an aircraft with vectored thrust. Simulation results show this control law achieves a high level performance even if the aircraft has large undetected failures.

Key words: reconfiguration, nonlinear dynamic inversion, adaptive fuzzy system, slide model control, vectored thrust