Integrated simulation framework for crash back operation

We formulate a modeling and simulation framework that integrates models of an all-electric ship (AES) with ship and propeller hydrodynamic models. In particular we present the first simulation study about the transient behavior of the propulsion system of AES during crash stop and backing maneuvers. A time domain model of all electric propulsion system of a notional destroyer has been coupled with a simplified transient model of the hull and propeller hydrodynamics. The integrated power system of the integrated power system (IPS) includes all main elements of the chain, i.e. from power generators to control units down to frequency controlled electric motors. The simplified unsteady hydrodynamic model of the hull and twin shaft lines with fixed pitch propellers is based on semi-empirical quasi static data corrected with complimentary CFD simulations. The transient behavior of the electrical power distribution and motor control are analyzed and the relevant implications that these kind of violent transient maneuvers have on the engineering of the main electrical components are outlined in the paper. \ua9 2012 Simulation Councils, Inc