Variable Universe Adaptive Fuzzy Sliding Mode Control for Missile Electro-Hydraulic Servo Mechanism

To reduce the chattering in the position tracking control of a missile electro-hydraulic servo mechanism,a variable universe adaptive fuzzy sliding mode control was put forward in this paper.The high frequency chattering in the control input caused by sliding mode switch control were effectively minimized by adjusting the universes of input variables and the membership fuzzy controller of conclusion part in rules on-line while the strong robustness of sliding variable control was not affected.The control law designed was presented,which was simple.The control system had characteristics of good ability to trace and improved tracking precision of missile electro-hydraulic servo mechanism.The simulation results showed that this method was effective.