Application of sliding mode control based on dmc in guidance control system

In this paper, a new control strategy is applied in guidance control system. It obtains the control law with predicting the sliding surface which designed in sliding mode control. This technique is called predictive sliding mode control. It acquires the robustness feature of sliding mode control and the good performance of predictive control. Finally, simulation results are provided to show the effectiveness of the proposed method.

I. Introduction

Sliding mode control is a technique derived from variable structure control. It has gradually been one of the most popular nonlinear control methods since 1977. This control has its intriguing strength. It is insensitivity to parameter variations and disturbances, regardless of nonlinearity and uncertainty. We should design a sliding surface, and then design the control law. However, chattering phenomenon is the primary disadvantage. In order to reduce the effects of chatting, many methods designed. There are many reasons causing this phenomenon. The primary reason is that the actuators can't practice at an infinite frequency which the discontinuous control inputs ought to switch at.