Application of singular perturbation analysis in dual control system design

Abstract:

Based on the difference in time scale between the aerodynamic fins and reaction jets, the singular perturbation analysis is employed to split the dual control system of the interceptor into slow and fast subsys- tems. Then, the robust Raytheon four-loop topology and linear quadratic regulator are used to design the fin control law and the reaction jet switching surface. Finally, the proposed autopilot is used to follow a steady- state acceleration command. It is shown that not only the acceleration command can be followed steadily but also the control effort can be distributed among the actuators effectively. The response in the first phase is im- proved when the initial value of RCS is large and the RCS trends to zero when the system is steady. Simultane- ously, the aerodynamic surfaces are used to trim the airframe