Design of sliding mode control system for automatic transition and hover of helicopter

In this paper, a T-S fuzzy model of helicopter transition and hover is established as the dynamic characteristics of the helicopter vary with decline of height and decrease of speed. Based on the performance index requirement of automatic transition and hover, the pole assignment method is used to determine the feedback control parameters and regulating controller in full envelope of the automatic transition and hover is designed according to the theory of parallel distributed compensation. Eventually the sliding mode control law is designed. The simulation results show that the designed system in this paper is feasible and effective.