Decentralized adaptive output-feedback control for a class of nonlinear large-scale systems with unknown time-varying delayed interactions
- Authors
- Yoo, Sung Jin; Park, Jin Bae
- Issue Date
- Mar-2012
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- Decentralized adaptive control; Output feedback; Unknown time delays; Observer dynamic surface design; Strict-feedback form; Function approximation technique
- Citation
- INFORMATION SCIENCES, v.186, no.1, pp 222 - 238
- Pages
- 17
- Journal Title
- INFORMATION SCIENCES
- Volume
- 186
- Number
- 1
- Start Page
- 222
- End Page
- 238
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/20448
- DOI
- 10.1016/j.ins.2011.10.004
- ISSN
- 0020-0255
- Abstract
- In this paper, the authors investigate a decentralized adaptive output-feedback controller design for large-scale nonlinear systems with input saturations and time-delayed interconnections unmatched in control inputs. The interaction terms with unknown time-varying delays are bounded by unknown nonlinear bounding functions including all states of subsystems. This point is a main contribution of this paper compared with previous output-feedback control approaches which assume that the time-delayed bounding functions only depend on measurable output variables. The bounding functions are compensated by using appropriate Lyapunov-Krasovskii functionals and the function approximation technique based on neural networks. The observer dynamic surface design technique is employed to design the proposed memoryless local controller for each subsystem. In addition, we prove that all signals in the closed-loop system are semiglobally uniformly bounded and control errors converge to an adjustable neighborhood of the origin. Finally, an example is provided to illustrate the effectiveness of the proposed control system. (C) 2011 Elsevier Inc. All rights reserved.
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Collections - College of ICT Engineering > School of Electrical and Electronics Engineering > 1. Journal Articles
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