Simulation studies for replenishment at sea operation.
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This study investigates the maneuvering of ships involved in the replenishment at sea operation under calm water conditions. Two sets of linear differential equations of motion of a ship in three degrees of freedom are implemented for an analog-digital simulation (hybrid operation). Mainly a two phase hybrid simulation is carried out. In the first part the real-time dynamic response of a single ship is obtained. Small perturbations, resulting from small changes in rudder angle and propeller RPM, are studied. In the second part interaction forces and moments are applied only to the leading ship as it is overtaken by the tracking ship. Thus the response of the leading ship is of primary interest on this phase. Finally interaction forces and moments are applied to both leading and tracking ship. Thus the complete response of the UNREP operation is obtained.
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