With the simulation technique keeping rapid development, updating HLA-incompatibility simulation model s to HLA compatibility, especially multi-elements simulation model , become a useful way to realize the aim and save the money and time for user. After introducing the HLA and HLA compatibility of model, in this paper, several facing problems during updating model including architecture, creating mode of data interface, simulation time driven mechanism, interactive mode of information and internal data structure were proposed. Aiming at these main problems, updating architecture should been done firstly from software and hardware which would reconstruct the connection modes among elements of simulation model . Partition of information flow module would distinguish the exchanging data between among elements and with outside of model and remove unnecessary sub-functions away from simulation model . Furthermore, it simplifies the difficulty of updating work and reduces workload which increases the updating project successful. The original time driven mechanism can accord to the HLA/RTI simulation clock by adjusting simulation time driven mechanism. Therefore the methods proposed in this study would improve universal and reusable of the simulation model of HLA incompatibility.
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