Study on Control Strategy of Integrated Hydraulic Propulsion Ship

A control strategy, constant power and variable power combination control (CVCC), was put forward for integrated hydraulic propulsion (IHP) ship against its characteristics. Theoretical analysis was conducted through working condition matching characteristic charts to evaluate the effect of this control strategy. Modeling and simulation of IHP ship was researched, and the theoretical analysis results were proved by the simulation results. These results show that CVCC is suitable for IHP ship, the diesel engine can always works under design working condition independent to the ship working conditions, put out rated power and run at rated rotation speed. This solve the problem that diesel engine on Direct Propulsion ship can not put out rated power when the ship works under off-design working conditions. CVCC is more applicable on those ships with various working conditions, such as: mud drag vessel, tugboat and fire ship.