Adaptive output feedback autopilot design for spinning projectiles

Design of spinning projectile autopilot is a challenge due to uncertain aerodynamics, and stringent performance requirements. To solve the control challenge for such state inaccessible plant, a robust output feedback adaptive controller is designed for a double-channel controlled spinning projectile in this paper. The first step towards the solution is the development of the dynamic model for the spinning projectile. Based on the model, an output feedback adaptive controller is applied for the autopilot design. Then a robust compensator is designed and added to the adaptive controller for the robustness. Simulation tests are performed to assess stability and performance of the closed-loop adaptive system. In addition, results in simulations indicate the autopilot allows for fast adaptation with high gain adaptive rates, while eliminating high frequency oscillation and guaranteeing transient performance.