Wave feedforward control of floating production systems

Wave basin tests have been conducted on a 129,600t turret-moored floating production system with wave feedforward control in long-crested and directional seas between 7m and 13.5m significant wave height. Strategies for generating real-time signals of wave drift processes either from vessel motions...

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Bibliographic Details
Published in:Control engineering practice 1995, Vol.3 (5), p.687-694
Main Authors: Linfoot, B.T., Wright, V.J.C.
Format: Article
Language:English
Subjects:
Adaptive control
Algorithms
basin tests
Dynamic positioning
Feedback
floating production systems
Kalman filtering
Mooring
Production platforms
Real time systems
Self tuning control systems
short-crested seas
Signal processing
Testing
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Summary:Wave basin tests have been conducted on a 129,600t turret-moored floating production system with wave feedforward control in long-crested and directional seas between 7m and 13.5m significant wave height. Strategies for generating real-time signals of wave drift processes either from vessel motions or directly from wave probes, and the integration of these signals into self-tuning and modified LQG control system, are described. The results indicate that adaptive control algorithms incorporating signals either from direct wave measurement or derived from the vessel's wave-frequency motions, can reduce the low-frequency motions of the system in both short- and long-crested seas.
ISSN:0967-0661
1873-6939
DOI:10.1016/0967-0661(95)00045-V