Aiming at the problem that the single control method is ineffective to the course control of the Air Cushion Vehicle (ACV), a compound control method combining PD control with fuzzy control is studied for keeping the ACV's course. According to the plane motion characteristics of the ACV, the PD-fuzzy controller of ACV is designed. The four-Degree-Of-Freedom (DOF) simulation model of the hovercraft is established by using MATLAB/SIMULINK, and the simulation tests of the PID controller and the compound controller are carried out respectively under different conditions. The simulation results show that the compound controller has the characteristics of fast response, strong anti-interference ability and good robustness compared with the conventional PID controller.
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