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Discrete‐time higher‐order sliding mode control of systems with unmatched uncertainty
Author(s) -
Sharma Nalin Kumar,
Janardhanan Shivaramakrishnan
Publication year - 2018
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.4377
Subject(s) - control theory (sociology) , mode (computer interface) , discrete time and continuous time , sliding mode control , controller (irrigation) , order (exchange) , control (management) , computer science , control engineering , engineering , mathematics , nonlinear system , economics , physics , artificial intelligence , statistics , finance , quantum mechanics , operating system , agronomy , biology
Summary The research on discrete‐time higher‐order sliding mode has received a considerable attention recently. Systems with unmatched uncertainties are common in practice; however, the existing discrete‐time higher‐order sliding mode control algorithms are designed considering only matched uncertainty. This paper proposes a technique to design discrete‐time higher‐order sliding mode control for an uncertain LTI system in the presence of unmatched uncertainty. The proposed technique is numerically simulated and experimentally validated on an electromechanical rectilinear plant. Various experiments are conducted considering the several operational conditions of electromechanical systems in industries to verify the performance of the proposed controller.