Energy Saving Shipping Based on Path Point Speed Optimization in Complex Marine Environment

Abstract

AbstractAiming at the problem of energy-saving path optimisation of ships, an energy-saving strategy for optimising the speed of ship path points in a complex marine environment is proposed. Firstly, the marine environment simulation model is established by simulation grid, the mathematical model of the marine environment is established by considering the influence of the direction and size of the environmental disturbance force on the energy consumption of the ship. By analysing the energy transfer between the hull, propeller and main engine, a ship energy consumption model influenced by the navigation environment is established. Furthermore, a shortest route path is planned in terms of the ant colony algorithm, and the particle swarm optimization (PSO) algorithm is also used to optimise the ship’s speed at different path points on the route to achieve energy-efficient shipping. Finally, the comparative simulations are conducted concerning the optimised speed and the fixed speed under the disturbance of the marine environment. The simulation results show that the proposed path point speed optimisation method can fully consider the influence of environmental disturbances and achieve optimal speed adjustment and reduced energy consumption. KeywordsMarine environment modelingShip energy consumption modelParticle swarm optimizationSpeed optimization