Design of an L.Q.G. controller for single point moored large tankers

Single point mooring is a commonly used method to keep large tankers moored at offshore loading terminals. When environmental forces increase however, loading operations become increasingly difficult. Dangerous oscillations are observed, with periods of several hundreds of seconds, which may cause m...

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Bibliographic Details
Published inAutomatica (Oxford) Vol. 22; no. 2; pp. 155 - 169
Main Authors Di Masi, G.B., Finesso, L., Picci, G.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1986
Elsevier
Subjects
Applied sciences
Computer science; control theory; systems
control systems
Control theory. Systems
controllers
dynamic positioning
Exact sciences and technology
Kalman filtering
L.Q.G. control
offshore structures
Optimal control
Single point mooring
tankers
Single point mooring
Kalman filtering
L.Q.G. control
dynamic positioning
Positioning
Gaussian process
Linear system
Quadratic cost
Optimal control
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Summary:Single point mooring is a commonly used method to keep large tankers moored at offshore loading terminals. When environmental forces increase however, loading operations become increasingly difficult. Dangerous oscillations are observed, with periods of several hundreds of seconds, which may cause mooring line breakage, wear and tear of the loading and mooring system etc. To counteract them the use of an active control system has been suggested. The system commands the main propeller and a bank of lateral thrusters placed in bow and astern position. The objectives and structure of such a control system are quite different from dynamic positioning systems currently used for drilling and support vessels.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0005-1098
1873-2836
DOI:10.1016/0005-1098(86)90077-4