Research On Heeling Compensation Control And Virtual Simulation For Large Ship

As the development of ocean carrying trade and the requirement of navy equipment, with the progress of shipbuilding technology, the scale and tonnage of ship is increasing day after day. It brings all-important influence to the economy development, industry advancement and coast defense security of the nation all over the world. This article, taking the large-scale ship as the object of study, has carried on the beneficial exploration and research to the transverse heeling rectification control strategy under each condition and the 3-D visual simulation process of the large-scale ship.Large-scale ship always appears transverse heeling when it is navigating or mooring, because of such factors as loads uneven, moving or loading and unloading weights and external environment disturbance, bringing serious effects for the ship and equipments' normal use.This paper, under the reasonable supposition, builds the simple rolling mathematic movement model of ship. A simple model is established for the slowly varying environmental forces and moments, such as mean wind and wave.Based on the overall factors of heeling, the author designs the compensation control system which takes sliding blocks as the executing unit. According to the sliders' starboard-to-portside movement, it produces the anti-heeling balance moments to balance the roll moments which are caused by the load and unload of weights or other factors. The simulation results show that the system is effective and executive, which can adjust the heeling angle to the request scope, and get the craft back to the right state and meet the precision demand.The author uses visual simulation technology into ships' maneuverable research, simulates the actual experiment through the virtual environmental scene, the 3-D entity modeling of ship and the relevant control modeling.In the test, taking the large-scale ship as the object of study, we elaborates the 3-D entity modeling method of ship, constructs the virtual scene where the ship navigation and optimizes the scheme. The paper has realized the special effect simulation of the system, such as shipping sailing wake and ocean effect, intuitively representing the ships' real-time navigation condition. It builds the good foundation for further unifies of ships' control model to simulate the real experiment, the confirmation theory and the model accuracy.