Variable Structure Control Design of Process Plant Based on Sliding Mode Approach

This paper deals with basic concepts, mathematics, and design aspects of variable structure controller based on sliding mode as a principle operation approach. After reviewing the operation of the plant, a variable-structure system (VSS) based scheme is formulated to control the outflow rate. The scheme is then designed and tested by Simulink Toolbox Ver. 3.0 of Matlab Ver. 6P5. Simulations are presented and have shown that VSS control is better and more versatile compared with the conventional approach using PID controller.