Modeling and control design for the deflectable nose missile

The deflectable nose missile belongs to skip to turn missile. Because of using the nose to control the pitch and yaw, the roll-channel of the autopilot couples with the other two channels. The coupling relation between the roll-channel and others can not be omitted even the dynamic model is simplified. But the yaw-channel and the pitch-channel can be designed independently. In the paper, the coupling factors among the roll-channel are reserved during the design and regarded as the disturbance. By using the variable structure control theory, the three-channel independent design is present. The control laws bases on the disturbances of the parameters of the model. The results of the simulation showed the controller meet the need of Performance of the control system and have the capabilities of the celerity and robustness.