Nonlinear Autopilot and Observer Design for a Surface-To-Surface, Skid-To-Turn Missile

We present an explicit form of nonlinear autopilot for a surface-to-surface, skid-to-turn missile that utilizes a nonlinear observer. The autopilot consists of an inner feedback linearizing control (FLC) loop and an outer linear control loop that is designed based on the linearized inner loop. For observer construction, an extended Luenberger approach has been used. The basic design procedure is outlined and simulation results with a realistic missile model has been described.