Asymptotic Regulation of Time-Delay Nonlinear Systems with Unknown Control Directions

© 1963-2012 IEEE. This paper studies the problem of global state regulation with stability for time-delay nonlinear systems with unknown control directions. Using a dynamic gain-based method for counteracting time-delay nonlinearity and the Nussbaum-gain function for dealing with unknown control dir...

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Bibliographic Details
Main Authors: Radom Pongvuthithum, Kanya Rattanamongkhonkun, Wei Lin
Format: Journal
Published: 2018
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Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85029183600&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/58506
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Institution: Chiang Mai University
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Summary:© 1963-2012 IEEE. This paper studies the problem of global state regulation with stability for time-delay nonlinear systems with unknown control directions. Using a dynamic gain-based method for counteracting time-delay nonlinearity and the Nussbaum-gain function for dealing with unknown control directions, we develop a dynamic state feedback control strategy that solves the problem. A novel construction of Lyapunov-Krasovskii functionals is presented and plays a key role in handling nonlinearity with delayed states and unknown control directions simultaneously. The proposed dynamic state feedback compensators are shown to guarantee 1) global asymptotic convergence of the system state to the origin and 2) global boundedness of the resulting closed-loop systems.