Research on Strong Real-time Synchronisation Algorithm for LVC Co-simulation

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

Abstract

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

CLC Number:

TP 391.9

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