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Effects of small time-delays on dynamic output feedback control of offshore steel jacket structures

journal contribution
posted on 2017-12-06, 00:00 authored by Z Xian-Ming, Qing-Long Han, Dongsheng Han
This paper investigates the effect of a small time-delay on dynamic output feedback control of an offshore steel jacket structure subject to a nonlinear wave-induced force. First, a conventional dynamic output feedback controller is designed to reduce the internal oscillations of the offshore structure. It is found that the designed controller is of a larger gain in the sense of Euclidean norm, which demands a larger control force. Second, a small time-delay is introduced intentionally to design a new dynamic output feedback controller such that (i) the controller is of a small gain in the sense of Euclidean norm and (ii) the internal oscillations of the offshore structure can be dramatically reduced. It is shown through simulation results that purposefully introducing time-delays can be used to improve control performance.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

330

Issue

16

Start Page

3883

End Page

3900

Number of Pages

18

eISSN

1095-8568

ISSN

0022-460X

Location

24-28 Oval Road, London, NW1 7DX, United Kingdom

Publisher

Academic Press

Language

en-aus

Peer Reviewed

  • Yes

Open Access

  • No

External Author Affiliations

Centre for Intelligent and Networked Systems (CINS); Institute for Resource Industries and Sustainability (IRIS);

Era Eligible

  • Yes

Journal

Journal of sound and vibration.