在基于HLA架构的大范围战场环境、多武器平台的分布式仿真系统中,仿真实体与仿真节点的增多使网络通信数据量大大增加；为了减少网络通信数据量,文中从实用性的角度出发介绍了两种应用技术,一是参考视景仿真中常用的LOD算法,采用一种LOD通信机制进行通信,根据部分呈现原理对仿真目标进行仿真关联度计算,并按照关联度对仿真数据的接收和发送进行过滤,有效降低了冗余数据的传输；二是提出时滞的DR递推算法控制视景仿真中仿真驱动,可以在满足较小的数据帧发送频率下,实现视景仿真中实体运动平滑渲染；文中结合某型潜艇训练模拟系统,应用两种算法进行视景仿真二三维通信,结果表明,文中的算法在视景仿真通信数据量的简化方面具有较好的效果,能满足视景仿真实时性的要求.%When developing a distributed simulation system of wide range of battlefield environment and multi - weapon system, the increase of simulation nodes and simulation entities would make the communication data amount in network increased greatly. To decrease the communication data amount in network, this paper presents two practical technologies based on practicability. At first a LOD communication method is introduced refer to the LOD algorithm in scene simulation system. The relating degree of simulation based on partly emerging objects effect is calculated, and then communication data are filtrated according to the relating degree. It discards the not necessary data in current simulation and reduces the amount of communication redundancy. And then a hysteretic DR (Dead Reckoning) algorithm is proposed in the scene simulation update. The normal DR algorithm always has to reckon the next frame control data according to the current one. In our system, the scene is simulated hysteretically. This technology decreases greatly the transmitting frequency of data frames and moreover can make the simulation entity' s motion smoothly. The method is used in our ship maneuvering training system and shows great effect in data amount reduction and simplification.
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