Robust tracking controller design for a class of linear time-varying systems and its application on BTT missiles

This paper deals with the robust tracking control problem for a class of partial information MIMO LTV systems, which is a common case in practical engineering. Since only a finite number of discrete characteristic time points during the whole operating region of the system could be measured, multi-linear model approximation approach is employed. Based on H_¿ theory, a sufficient criteria is proposed to construct the global robust controller, which could guarantee the global stability of the multi-linear system. An important contribution of this method is that it provides a simple and feasible approach for the design of multi-linear systems which could easily guarantee both the global stability and robustness of the closed-loop systems. This method is applied to the design of a BTT (bank-to-turn) missile autopilot and the simulation results show the effectiveness of this method.