Performance Analysis of Sliding Mode Control method with a PID Controller for a Nonlinear System

Abstract: Accurate and quick control of parameters is required in this day and age for smooth and efficient production of products in industries. For this, the Sliding Mode Control (SMC) method for a non-linear system is proposed in this paper. The non-linear system considered in this paper is a Single-Input Single-Output (SISO) conical tank. A mathematical model is obtained for the given system and then the sliding surface is developed using the Lyapunov analysis. Simulation is then done for the PID controller and also for the proposed SMC method and then the performance index for both is compared. It is seen that SMC shows better performance compared to PID controller.

Keywords: SMC, SISO, Lyapunov analysis, PID controller.