Design of Acceleration Autopilot for Dolphin Head Shaped Missile in Boost Phase
An online tuning method for a three-loop autopilot based on adaptive control theory is presented in this paper.Due to the rapidly changing disturbance of a dolphin head shaped missile in boost phase,the autopilot is unable to follow commands accurately,which overloads by pitch disturbance torque.In order to solve the problem,firstly,the state equation of the three-loop autopilot is established based on short period dynamics,and the pole placement method is applied to design the control parameters in the nominal state.Then,the nominal autopilot is designed as a reference model,and the control parameters are designed by a Lyapunov function using the model reference adaptive method.Aiming at enhancing the stability of the a-daptive controller under modeling uncertainties,the projection operators and dead zones are introduced.Fi-nally,the three-loop adaptive autopilot tracking simulation is conducted for the dolphin head shaped missile in boost phase.The simulation results of the three-loop adaptive autopilot show fairly good tracking perform-ance of the dolphin head shaped missile.
Adaptive controlThree-loop autopilotPole placementDolphin head shaped missile
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