Abstract:

The robust adaptive attitude tracking control problem is studied, aiming at characteristic of near space vehicle (NSV), whose wing sweep angle is variable in the large envelop and multi-modes. Firstly, a smooth master controller is presented for the nominal NSV switched nonlinear systems, in order to solve the controlled variables jumping which is caused by the flight mode switching. Secondly, a class of modified simultaneous switching disturbance observer is designed for the discontinous problem of compound distrubance in switching transient. And a compound controller of uncertain NSV switched nonlinear systems is consisted by the output of modified distrubance observer and the smooth masrer controller. Under the average dwell time, the proposed method can maintain the stability of the closedloop NSV systems. Finally, the simulation results are presented to show the effectiveness of the proposed scheme.