Abstract:

Abstract A nonlinear approach to the pitch, angle of attack and flight path control problems for the aircraft is presented. Backstopping method is utilized for a control of a globally stabilizing controller. We study the problem of robustness a trajectory tracking controller to a path angle method for a nonlinear longitudinal. In this research we introduce a nonlinear technique backstopping approach to flight control law design and aircraft trajectory tracking. The nonlinear controller designed makes the system follow references in the aerodynamic angles of longitudinal mode using the elevator deflections and the throttle as actuators. Backstopping controller uses the nonlinear equations of motion of airplane. The synthesized of the proposed method is to improve and guarantee the robustness; we therefore tested the control laws in several situations with the analysis of results for several weights and altitudes. Asymptotic Lyapunov stability is ensured for the developed method while robustness is guaranteed to flight control law design and aircraft trajectory tracking. We therefore simulated on MATLAB, the model of the A300 aircraft flying at different weight and altitude. Analysis and simulation results show that the robustness controller is stable and robust in the presence with different altitudes and weights for aircraft.

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