Second order sliding mode controller for second order process with delay time

This paper is concerned with design of second order sliding mode controller (SOSMC) with linear dynamic sliding surface. The sliding surface consists of a gain matrix having a variable damping ratio and settling time. The methodology explained is suggested to design systems with desired dynamic behaviour and robust for process uncertainties. In this study sliding mode control (SMC) and SOSMC are designed with linear dynamic sliding surface. The SOSMC proved that output response of process is effectively improved with smooth and reduced control efforts. For effectiveness of the SOSMC strategy, it is verified by simulation of an illustrative example of second order process with delay time (SOPDT).