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Design and experimental evaluation of global sliding mode controller

Design and experimental evaluation of global sliding mode controller The paper considered real-life applicability of global sliding mode controller (GSMCr) for nonlinear uncertain tank process. In a typical sliding mode control (SMC), robustness during reaching phase is not guaranteed. The proposed strategy interrogates the reaching phase, mitigates chattering, and overcomes external disturbances. The control law input has been formulated based on minimum and maximum values of estimated system parameters to alleviate chattering effect. Direct Lyapunov function confirms the stability condition. Proposed method has been designed and implemented to realise a smooth sliding manifold. The efficacy is demonstrated experimentally for laboratory single input single output level control system as well as second-order uncertain servo plant via the simulation tests. The reported results affirm the superiority of control method over typical SMC in terms of speed of process and time-domain specifications. The real-time implementation guarantees the robustness in terms of multi-level set-point changes, parameter variations and disturbance rejection. It shows 33.33% improvements in process variable deviations and 10.71% reduction in chattering as compared to conventional SMC. The simulation example shows 8.51% chattering reduction over prevalent SMC. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Systems, Control and Communications Inderscience Publishers

Design and experimental evaluation of global sliding mode controller

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Publisher
Inderscience Publishers
Copyright
Copyright © Inderscience Enterprises Ltd
ISSN
1755-9340
eISSN
1755-9359
DOI
10.1504/ijscc.2023.127483
Publisher site
See Article on Publisher Site

Abstract

The paper considered real-life applicability of global sliding mode controller (GSMCr) for nonlinear uncertain tank process. In a typical sliding mode control (SMC), robustness during reaching phase is not guaranteed. The proposed strategy interrogates the reaching phase, mitigates chattering, and overcomes external disturbances. The control law input has been formulated based on minimum and maximum values of estimated system parameters to alleviate chattering effect. Direct Lyapunov function confirms the stability condition. Proposed method has been designed and implemented to realise a smooth sliding manifold. The efficacy is demonstrated experimentally for laboratory single input single output level control system as well as second-order uncertain servo plant via the simulation tests. The reported results affirm the superiority of control method over typical SMC in terms of speed of process and time-domain specifications. The real-time implementation guarantees the robustness in terms of multi-level set-point changes, parameter variations and disturbance rejection. It shows 33.33% improvements in process variable deviations and 10.71% reduction in chattering as compared to conventional SMC. The simulation example shows 8.51% chattering reduction over prevalent SMC.

Journal

International Journal of Systems, Control and Communications – Inderscience Publishers

Published: Jan 1, 2023

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