ABSTRACT. When the zero solution of an almost periodic differential system is uniform-asymptotically stable, it is shown that the zero solution is diminishingly asymptotically stable and totally asymptotically stable. Generalization of the above theorem to bounded solutions and functional differential equations with finite time-lag are obtained by the same method. The techniques used in the pro...

This brief presents a nonlinear observer that performs range estimation as well gyro-bias by using velocity, angular rate, and bearing angle measurements from landmarks at unknown locations. The is proved to have semiglobal asymptotic stability, its performance verified in simulations on experimental data. demonstrated an unmanned aerial vehicle (UAV) with sensor setup consisting of camera, ine...

An asymptotically stable direct adaptive fuzzy PI sliding modecontroller is proposed for a class of nonlinear uncertain systems. In contrast toother existing approaches of handling disturbances, the proposed approachdoes not require this bound to be known, only requiring that it exists.Moreover, a PI control structure is used to attenuate chattering. The approachis applied to stabilize an open-...