Design and analysis of sliding mode control for an unstable FOPTD

This literature deals with a considerable number of controller design procedures are existing for the unstable processes. In this work, design of Sliding Mode Control (SMC) based on super twisting approach is discussed for the unstable process. The performance of the SMC is assessed for the servo and the regulatory operations and the performance measures, such as rise time, overshoot, settling time and error values are computed. Also, the robustness of the SMC is tested by introducing the white noise in the feedback loop. Finally, the performance of SMC is validated against the PID controller designed with the conventional approach, FA and PSO. From this result, it is observed that, SMC offers better result compared with the PID for both the servo and regulatory operations.