LVC 联合仿真强实时同步算法研究

doi:10.16182/j.issn1004731x.joss.24-0741

摘要/Abstract

摘要：

实况-虚拟-构造(live，virtual，and constructive，LVC)联合仿真已成为当前军用仿真技术研究的热点，然而现有的时间管理策略难以实现LVC仿真要求的强实时性。为此，提出了一种 LVC 联合仿真强实时同步算法。该算法引入基于滑动窗口的中位数平滑策略和基于实时漂移率的时钟补偿策略，实现了分布式节点间时钟的有效同步；引入一种基于软件实现的长短周期混合高精度定时策略，兼顾了定时精度与效率；针对软件延迟问题，提出了一种仿真追赶策略，与高精度定时策略相结合，实现了分布式仿真的精准同步推进。仿真实验结果表明：该算法在同步精度与稳定性上均优于经典时间同步算法，实现了亚毫秒精度的分布式强实时仿真同步。

关键词: 联合仿真, 实况-虚拟-构造仿真, 时间管理, 时钟同步, 仿真追赶策略

Abstract:

Live, virtual, and constructive(LVC) joint simulation has become a hot research topic of current military simulation; however, existing time management strategies usually fail to meet the needs of strict real-time performance of LVC. A LVC joint simulation synchronization algorithm is proposed that starts with a window sliding-based median smoothing strategy and real time drift rate-based clock compensation strategy for effective node synchronization. A novel hybrid timing strategy is introduced combining long and short cycles implemented in software, which balances precision and efficiency. A simulation catch-up strategy is proposed to address software delays, which combined with the high-precision timing strategy, ensures synchronous progress in distributed simulations. Experimental results demonstrate that this algorithm surpasses traditional time synchronization methods in both accuracy and stability, achieving sub-millisecond precision in distributed strict real-time simulation synchronization.

Key words: joint simulation? live-virtual-constructive simulation? time management? clock synchronization, simulation catch-up strategy

中图分类号:

TP 391.9

李俊辉,孙松涛,刘飞 . LVC 联合仿真强实时同步算法研究[J]. 系统仿真学报, 2025, 37(9): 2301-2314.

Li Junhui,Sun Songtao,Liu Fei . Research on Strong Real-time Synchronisation Algorithm for LVC Co-simulation[J]. Journal of System Simulation, 2025, 37(9): 2301-2314.

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变量类别	变量因素	参数设置
系统负载	CPU占用	30%(低)/60%(中)/100%(高)
系统负载	内存占用	30%(低)/50%(中)/80%(高)
定时器方法	定时器类型	Waitable/Multimedia/Sleep/QPCPolling/LaSPM
优化方法	优化类型	不处理/提高系统时钟分辨率/提高优先级/同时提高
测试步长	时间间隔	1/10/100 ms

方法	最大偏差/ms			平均偏差/ms
方法	最大值	均值	最小值	最大值	均值	最小值
无优化QPCPolling	94.86	11.025 000	0.040	0.438 301	0.026 280	0.000 103
无优化 Multimedia	35.38	7.418 704	1.314	1.273 020	0.440 376	0.241 693
优化 Multimedia	1.772	1.549 037	1.224	0.615 292	0.387 068	0.247 414
优化 QPCPolling	0.162	0.068 852	0.011	0.000 392	0.000 162	0.000 014
LaSPM	0.173	0.068 815	0.013	0.000 353	0.000 130	0.000 012

方法	0~1 ms区间计数	1~10 ms区间计数	10~100 ms区间计数
无优化QPCPoling	99.69	0.23	0.08
无优化Multimedia	91.16	8.72	0.12
优化Multimedia	91.51	8.49	0
优化QPCPoling	100	0	0
LaSPM	100	0	0

方法	平均系统占用率/%
QPCPolling	30
Multimeida	1
LaSPM	4

方法	仿真时间/s					差值/ms
方法	节点1		节点2	节点3		节点1		节点2		节点3
经典层次化时间同步算法	5 999.95	5 963.95			5 997.95	50	37 050		2 050
强实时仿真同步算法	6 000	6 000.001			6 000	0	1		0