Research On Data-management Technology In Distributed Virtual Fight-test System

Distributed Virtual Flight-test System simulates the missile strike process, which facilitates the development of a new generation of weapon systems, the research of this simulation system can effectively save the military outlay, shorten the development cycle and improve efficiency. As the next generation of distributed simulation standard, High Level Architecture (HLA) mainly intends to solve the interoperability and reusability problem of distributed simulation system, but it can't solve the condition in which there is too much data and many entities distributed widely. The dissertation researches the data management in the HLA simulation, using the Distributed Virtual Flight-test System as the background.Firstly, the paper analyzes and designs the architecture of the data management system. It briefly introduces the HLA technique and the main function of fight-test system, then explains the requirement and performance request of data management system, finally brings forward a node autonomy, multicast transmission framework.Secondly, the paper researches the data storage planning technique. Combining with distributed database technology, it detailed studies the data distribution and data replication of the fight-test system, adopts the vertical fragmentation, non-redundant data distribution approach, designs the overall view using bottom-up method. To meet the data replication requirement of LAN based distributed simulation system, the paper brings forward the real-time loading mode through network. The paper also discusses database design plan of each node, different data type requires different management way.Thirdly, the paper does research on the data transmission planning technique. It detailed analyzes the public-subscribe process of the fight-test system, researches the basic principles and existing algorithms of data filtering technique, then a new data distribution strategy based on non-continuous virtual environment is proposed. In this paper it also explains the key step data flow of data filtering method, which is based on the HLA data distribute management interface.Data recording and playback technology is not clearly explained in HLA, contrasting with DIS standards, this paper analyzes the difficult when implements in HLA, considering the requirement of the fight-test system, a new universal data recording and playback method is proposed, which guarantee the effectiveness of the...