Research On Virtual Reality Visual Simulation Technology Of Ship Heading/Rolling Motion Attitude

The control of the ship’s heading/rolling motion attitude has complex and variable characteristics,which is a complex control problem.Only the advanced control strategy can give satisfactory ship maneuvering performance.The simulation,experiment and practice of control strategy must consume a lot of manpower and material resources in practical engineering,so establishing a good simulation environment is an effective means to test various control algorithms.Based on Unreal Engine 4,this thesis studies,designs and implements the 3D platform-based visual simulation system of ship heading/rolling motion attitude and the VR(virtual reality)system of ship heading/rolling motion attitude.The specific contents are as follows:Firstly,the overall technical scheme of 3D virtual reality visual simulation system is proposed,including 3D static mesh modeling,2D texture drawing,3D simulation environment construction,lighting and material processing,and blueprint system responsible for logic control.Secondly,the hardware configuration scheme and software design method of 3D platform-based visual simulation system are proposed.The device configuration scheme of VR(virtual reality)system is designed and the system function design is completed.Both systems implement offline packet-driven simulation.Mode and online real-time data driven simulation mode.Then,for the 3D platform visual simulation system and VR(virtual reality)system,the collision detection speed and accuracy requirements are mainly optimized and improved by the collision detection algorithm between the convex bodies.A collision detection algorithm based on AABB-MPSO is proposed.The experimental environment is built and verified,and the efficiency and real-time performance of the algorithm are verified.At the same time,in order to maintain the visual effect and high screen refresh rate for the three-dimensional environment with the massive data characteristics of the above two systems,a multi-resolution representation algorithm for the three-dimensional space environment TIN model is proposed,which is mainly based on vertex deletion.The orderly process,using the algorithm to successfully build a real-time three-dimensional space environment of 3D platform-based visual simulation system and VR(virtual reality)system,verified the feasibility of the algorithm.Finally,the 3D platform-based visual simulation system of the ship’s heading/rollingmotion attitude and the development of the VR(virtual reality)system of the ship’s heading/rolling attitude are completed.The 3D platform-based visual simulation system mainly includes: the visualization process of the three-dimensional scene,the design of the roaming system,the realization of the fixed observation angle,the split screen design of the HUD technology,the design of the UI interactive interface,and the drawing of the real-time three-dimensional curve.VR(virtual reality)system mainly includes: VR helmet display and VR handle positioning implementation,VR(virtual reality)scene construction,real-time rendering implementation and human-computer interaction design and implementation in VR virtual reality scene.The two systems form a comprehensive experimental platform for the ship’s heading/rolling motion posture in different display modes and interaction modes.