Practical Implementation of Sliding Mode and Super-twisting Control for Flow Control System

Abstract

This work investigates robust control designs for one of the crucial controlled variables in process industries, the flow control system. Two widely-used control designs, sliding mode control (SMC) and super-twisting control (STC), are applied to regulate a flowrate in a laboratory experimental setup with an objective of setpoint tracking. The aim is to evaluate the performance of SMC with its known limitation of chattering, and assess whether the implementation of second-order sliding mode control (STC) mitigates this issue. The results highlight significant chattering in the process output during the SMC implementation, while STC effectively reduces these oscillations, achieving more stable setpoint tracking.     for current disturbance mitigation. Simulations of MATLAB/SIMULINK environment of the present work shows the efficacy.