Robust control for a class of time varying systems via switching hypersurface design with output signals

Sliding mode control methods have been used widely since they provide robus tness against parameter variations and disturbances. This paper focuses on the problem of a robust output-sliding control design for linear uncertain multiinput multi-output time-varying systems with norm-bounded uncertainty. Output signals are used for the definition of switching hypersurfaces. The formulation of a control law is emphasized. Output tracking can be achieve d against a class of time varying parameter variations and external disturb ances. The effectiveness of the proposed output-sliding control is confirme d by an application example. (C) 2001 Elsevier Science Ltd. All rights rese rved.