Distributed Dynamic Simulation Of Underwater Emergency Maintenance Based On HLA

Virtual Reality is one of most concerned about the new and high technology,and Distributed simulation technology is a hot topic in the field of virtual reality system.With larger scale of the virtual reality system and requirements of high verisimilitude,Combining distributed simulation technology,visual simulation technology and dynamics simulation technology for interaction become a trend,currently distributed architecture based on visual commonly use single-node to execute dynamics calculation,but single-node calculation mode will causes the load imbalance and hard to combine other systems.According to the shortcomings of traditional distributed architecture,design a distributed dynamic framework with combination of dynamic simulation and visual simulation,and apply the framework to the deep underwater simulation system of emergency maintenance,the main research contents as follows:1.Analyze Problems existing in Centralized Dynamic Simulation,Design a distributed dynamic framework,which separate physical calculation to different nodes,it will reduce the coupling between subsystems.2.Design a distributed dynamic simulation system based on HLA to improve the current distributed structure of deep underwater simulation system of emergency maintenance,which separate relatively independent calculation to different node and data exchange between nodes for the interaction by HLA data exchange service.3.On the basis of system design and research of interaction of different simulation node,system achieved ROV object synchronization in a distributed calculation physical structure.4.Use the conservative time advance based on the simulation time step to solve spatiotemporal coupling inconsistency problem,and make position of ROV object consistency by coordinated federate simulation cycle.Results of experimental verify distributed dynamics simulation can be used in simulation system of emergency maintenance,it could effective solve the problem of over-concentration physical calculation,realizing mufti-users co-operating in the same space-time virtual environment.