Robust Finite-Time Terminal Sliding Mode Control for a Francis Hydroturbine Governing System

The robust finite-time control for a francis hydroturbine governing system is investigated in this paper. firstly,the mathematical model of a francis hydroturbine governing system is presented and the nonlinear vibration characteristics are analyzed. then,on the basis of finite-time control theory and terminal sliding mode scheme,a new robust finite-time terminal sliding mode control method is proposed for nonlinear vibration control of the hydroturbine governing system. furthermore,the designed controller has good robustness which could resist external random disturbances. numerical simulations are employed to verify the effectiveness and superiority of the designed finite-time sliding mode control scheme. the approach proposed in this paper is simple and also provides a reference for relevant hydropower systems. � 2016 fengjiao wu et al.