Research on time management method based on vector time

Abstract

The time synchronization among simulation federates could be realized through logical time by traditional time management of distributed simulation. There are two types popular time management of distributed simulation based on logical time, conservative time advance mechanism and optimistic time advance mechanism. Conservative time advance mechanism restricted the causal relationship between simulation federates and might lead to poor simulation efficiency and deadlock while the difficulty in rollback might exist in optimistic time advance mechanism. Based on the vector time, an optimistic time managing mechanism was put forward, the updating algorithm of vector time was introduced and the rollback control based on vector time was researched. The application in intelligent detection simulation system of carrier rockets demonstrated that in the environment of small number federates, the algorithm could control rollback storm effectively and would show high efficiency and reliability.