Application of a dynamic positioning system to a moored floating platform

Masahiko Nakamura, Wataru Koterayama, Hiroyuki Kajiwara, Tomohiro Mitamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

This paper presents the dynamics of a thruster assisted mooring system. Mooring is used to maintain the position of a floating platform against quasi-constant external forces induced by current and wind, and thrusters control slow drift oscillation. The LQI (linear quadratic with integral) control system was adopted to prevent this oscillation. Control of motions in the wave frequency region was ignored because the amplitude of those motions is smaller than those of the slow drift oscillation and enormous power by a thruster is needed to control them. Hydrodynamic coefficients of the floating platform were obtained by model experiments and calculation using a three-dimensional Singularity Distribution Method. Simulations of motions in irregular waves, current and wind were carried out and the performance of LQI control system was discussed.

Original languageEnglish
Title of host publicationProceedings of the International Offshore and Polar Engineering Conference
PublisherPubl by Int Soc of Offshore and Polar Engineerns (ISOPE)
Pages190-197
Number of pages8
ISBN (Print)1880653117
Publication statusPublished - 1994
EventProceedings of the 4th International Offshore and Polar Engineering Conference. Part 1 (of 4) - Osaka, Jpn
Duration: Apr 10 1994Apr 15 1994

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume1

Other

OtherProceedings of the 4th International Offshore and Polar Engineering Conference. Part 1 (of 4)
CityOsaka, Jpn
Period4/10/944/15/94

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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