HLA时间管理中死锁的解除

时间管理服务是高层体系结构HLA(High Level Architecture)的重要组成部分，而考虑不全面的时间推进机制和算法会导致死锁，进而导致整个仿真系统无法向前推进。讨论了死锁出现的原因，对Frederick算法存在的不足之处进行了修正，提出了改进的身高测量法，并证明了这种方法不会产生死锁现象。在设计一个联盟时可考虑使盟员灵活地使用保守和乐观两种时间推进机制，并在对保守盟员计算GALT时使用改进的身高测量法，这样就可以在仿真过程中有效地避免死锁的产生。

Break of Deadlock in Time Management of HLA

Time management is an important component of High Level Architecture, while inconsiderate time advance mechanism and unreasonable algorithm can result in a deadlock so that the whole federation can not be able to advance any more. We analyse the reason of appearing deadlock, correct the shortcoming resulted in the Frederick algorithm, provide an improved Stature-Measuring algorithm, and prove that this algorithm will not result in deadlock problem. Conservative and optimistic time advance mechanism should be used actively when designing a federation, and improved Stature-Measuring algorithm should be used when calculating the GALT of conservative federates. So the deadlock problem can be avoided effectively in the processing of simulation.