Deadzone and uncertainties dynamic compensation for missile servo control systems

For deadzone, parameters variations and disturbances in missile servo control system, a robust adaptive fuzzy fast terminal sliding mode controller was proposed to compensate deadzone, uncertainties and other disturbances. An adaptive fuzzy logic controller for the deadzone dynamic compensation was adopted in feedforward loop. The variations of hinge moment were identified online requiring no prior knowledge. The controller also had good regulations to other uncertainties and external disturbances. The closed loop control system was proved to be globally uniform asymptotically stable. The simulation results showed that the designed algorithm was effective in compensating the deadzone, improved tracking performance, shortened settling time, and had good robustness and stability to disturbances and parameters variations.