The very purpose of attaching fins to the hull is to reduce the roll motions of a ship. Roll minimization is a requisite for various operations in the seas. The presence of fin system provides enhanced state of stabilization especially when the vessel is performing a fast maneuvering amidst rough environmental disturbance. The fins in turn are activated by electro-hydraulic mechanism based on the in-built intelligence as per control theory like PID (proportional-integral-derivative) or fuzzy logic. As per this paper, fin system is activated using PID control algorithm. A frigate-type warship is considered for the demonstration purpose. Nonlinear roll motions are controlled using active fins. Lift characteristics of the fins in hydrodynamic flow were studied using CFD package fluent. Good amount of reduction in roll amplitude is achieved from various simulations in random sea. The approach can be used for any irregular sea conditions.
Studies on an algorithm to control the roll motion using active fins
Untersuchungen an einem Algorithmus zum Steuern der Rollbewegung eines Schiffes unter Verwendung aktiver Flossen
Ocean Engineering ; 34 , 3-4 ; 542-551
2007
10 Seiten, 25 Quellen
Aufsatz (Zeitschrift)
Englisch
Control of ship roll motion by active fins using fuzzy logic
Online Contents | 2007
|Control of ship roll motion by active fins using fuzzy logic
Taylor & Francis Verlag | 2007
|Slot Heating Associated with Roll Control Fins
AIAA | 1974
|Technical note Studies on the feasibilities of control of ship roll using fins
Taylor & Francis Verlag | 2006
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