Abstract:

Robust output tracking controller design method of uncertain non linear systems was studied and applied to flight control. There exists one kind of high gain robust output tracking controller in case that the nonlinear system is Input/Output linearizable and the uncertainties are assumed to be bounded and satisfy the general matching condition. The given robust controller only depends on the design parameters and the bounds of uncertainties. The outputs of system can asymptotically track the desired bounded tracking signal whose derivatives are also bounded. The flight longitudinal dynamic is apparently nonlinear and robust controller is necessary while treating the high order terms in dynamic as uncertainties. The small tracking error verifies the effectiveness of the design method and controller.

Key words: robust output tracking control, characteristic index, general matching condition, highgain feedback controller