Research On Key Technologies Of Event-driven Distributed Simulation System

In recent years,due to the fields of complex system simulation becoming more and more wide,the complexity of the simulation design environment and simulation model are increasing,which leads to that the running efficiency and universal property of distributed simulation system have higher requirements.At present,the scheduling idea of distributed simulation system is mainly divided into time driven scheduling strategy and event driven scheduling strategy.The time driven model scheduling strategy is not suitable for large-scale general-purpose simulation applications because it is more complex and the applying scope of it is narrow.Event driven scheduling strategy based event on a driver,the running order of models is in strict accordance with the data flow and has no dependence on the simulation time,so it can facilitate data tracking in the simulation process.Therefore,this paper adopts event driven scheduling strategy for distributed simulation system design,the main work includes:1.By comparing with the common distributed simulation system,this paper presents a new three layer distributed architecture of distributed simulation.In this architecture,the functional coordination and data interaction are relatively simple,it can also realize the centralized management of data and reduce system overhead.2.In order to achieve the universality of this architecture,this paper has a research on integration technology of simulation application.And a general simulation application integration method is adopted,which can integrate many kinds of domain modeling software.3.The hierarchical structure of event driven distribute simulation system is designed by the idea of service-oriented,the design and implementation of the communication service layer of this architecture bring the fast and efficient data transfer between the components of the architecture.4.A new event scheduling method is proposed based on the analysis of the common event scheduling strategy and the considering of the system level modeling idea based on the design structure matrix,meanwhile,a research about event management technology has been done.On the basis of the above study,this paper has designed a distributed simulation system named MultiDAS(Multidisciplinary Design Analysis and Simulation),takes the multidisciplinary modeling and simulation of all-electric telecommunication satellite as a case to check universal property and validity of the MultiDAS through the analysis of simulation application integration and simulation results.