Nowadays naval vessels are characterised by flexible and complex propulsion systems with powerful prime movers, the most powerful of which is often the gas turbine. The great power available to the propellers entails a careful power management for a safe operation in every propulsive condition, including emergency ship manoeuvres as slam start and crash stop. During these critical situations a very important role is played by the propulsion automation system, which has to manage and control the whole emergency manoeuvre in a safe and efficient way. The paper deals with the description of some proper control logic schemes to manage slam start and crash stop of the new frigates equipped with CODLAG propulsion system. The presented solution is proposed within the cooperation project between Genoa University and Seastema S.p.A., a global ship automation provider, aimed to design and optimise, by numerical simulation techniques, the propulsion control systems. The simulation results are shown and discussed, in order to justify the guidelines followed for the choice of these special control functions, acting during the most critical manoeuvres of the ship.
Propulsion control optimisation for emergency manoeuvres of naval vessels
ALTOSOLE, MARCO;FIGARI, MASSIMO;MARTELLI, MICHELE;
2012-01-01
Abstract
Nowadays naval vessels are characterised by flexible and complex propulsion systems with powerful prime movers, the most powerful of which is often the gas turbine. The great power available to the propellers entails a careful power management for a safe operation in every propulsive condition, including emergency ship manoeuvres as slam start and crash stop. During these critical situations a very important role is played by the propulsion automation system, which has to manage and control the whole emergency manoeuvre in a safe and efficient way. The paper deals with the description of some proper control logic schemes to manage slam start and crash stop of the new frigates equipped with CODLAG propulsion system. The presented solution is proposed within the cooperation project between Genoa University and Seastema S.p.A., a global ship automation provider, aimed to design and optimise, by numerical simulation techniques, the propulsion control systems. The simulation results are shown and discussed, in order to justify the guidelines followed for the choice of these special control functions, acting during the most critical manoeuvres of the ship.
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