<abstract xmlns="http://www.w3.org/1999/xhtml"><p>A new approach is proposed to design the sliding mode (SM) controller for the unstable second-order plus dead-time (SOPDT) processes. The sliding mode control consists of two control laws ie continuous control law and discontinuous control law. The continuous control law parameters have been derived in terms of unstable SOPDT process parameters using the root locus technique. On the other hand, the parameters of discontinuous control law are tuned by optimizing a performance index using a recently developed metaheuristic search algorithm, namely the grasshopper optimization technique. The performance index is framed to achieve a good trade-off between performance and control efforts. Finally, simulations are conducted to validate the effectiveness of the proposed approach over the other existing techniques. It is observed that the proposed approach is able to deliver better disturbance rejection, minimal control efforts and good setpoint tracking.</p></abstract>

A new approach is proposed to design the sliding mode (SM) controller for the unstable second-order plus dead-time (SOPDT) processes. The sliding mode control consists of two control laws ie continuous control law and discontinuous control law. The continuous control law parameters have been derived in terms of unstable SOPDT process parameters using the root locus technique. On the other hand, the parameters of discontinuous control law are tuned by optimizing a performance index using a recently developed metaheuristic search algorithm, namely the grasshopper optimization technique. The performance index is framed to achieve a good trade-off between performance and control efforts. Finally, simulations are conducted to validate the effectiveness of the proposed approach over the other existing techniques. It is observed that the proposed approach is able to deliver better disturbance rejection, minimal control efforts and good setpoint tracking.

Sliding mode controller design for second-order unstable processes with dead-time

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A new approach is proposed to design the sliding mode (SM) controller for the unstable second-order plus dead-time (SOPDT) processes. The sliding mode control...

Sliding mode controller design for second-order unstable processes with dead-time

Published Online: Sep 22, 2020

Page range: 237 - 245

Received: Jun 16, 2020

DOI: https://doi.org/10.2478/jee-2020-0032

Keywords
sliding mode control, unstable process, grasshopper optimization, SOPDT process

© 2020 Mohammad Atif Siddiqui et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Sliding mode controller design for second-order unstable processes with dead-time

Published Online: Sep 22, 2020

Page range: 237 - 245

Received: Jun 16, 2020

DOI: https://doi.org/10.2478/jee-2020-0032

Keywordssliding mode control, unstable process, grasshopper optimization, SOPDT process

© 2020 Mohammad Atif Siddiqui et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
sliding mode control, unstable process, grasshopper optimization, SOPDT process