Decentralized adaptive output-feedback control for a class of nonlinear large-scale systems with unknown time-varying delayed interactions

Sung Jin Yoo, Jin Bae Park

Research output: Contribution to journalArticle

43 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)222-238
Number of pages17
JournalInformation sciences
Volume186
Issue number1
DOIs
Publication statusPublished - 2012 Mar 1

Fingerprint

Output Feedback Control
Large-scale Systems
Decentralized
Feedback control
Large scale systems
Time-varying
Nonlinear Systems
Unknown
Subsystem
Interaction
Input Saturation
Error Control
Function Approximation
Output Feedback
Time-varying Delay
Interconnection
Controller Design
Controllers
Lyapunov
Closed-loop System

All Science Journal Classification (ASJC) codes

  • Software
  • Control and Systems Engineering
  • Theoretical Computer Science
  • Computer Science Applications
  • Information Systems and Management
  • Artificial Intelligence

Cite this

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Decentralized adaptive output-feedback control for a class of nonlinear large-scale systems with unknown time-varying delayed interactions. / Yoo, Sung Jin; Park, Jin Bae.

In: Information sciences, Vol. 186, No. 1, 01.03.2012, p. 222-238.

Research output: Contribution to journalArticle

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