飞行模拟器分队战术仿真中视景图像抖动研究
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摘要
基于某型战斗机飞行模拟器系统进行分队战术对抗模拟训练时,发现从本地模拟器视景中观察邻近的远程模拟器时被观察的实体会出现图像抖动现象,严重影响了虚拟仿真的沉浸感;首先介绍了该仿真训练系统及出现的视景图像抖动现象;接着分析了内在原因,指出模型仿真粒度的差异性和网络延迟的随机性共同作用会导致分布式系统中的不同节点出现时空不一致,该现象进一步导致了节点间仿真数据相对值出现高频抖动,当抖动平均幅值超过阈值时会在视景中表现为视觉上的图像抖动,测量了抖动阈值和实体间相对距离的关系,并论证了对相对数值进行平滑是消除视景抖动的正确途径;最后提出了基于加权滑动平均滤波的视景图像抖动消除方法并验证了其有效性。
When carrying on the training of element tactics based on the flight simulator system,it is found that the image jittering occurred while watching remote simulator from local simulator virtual scene.It badly affects the immersion sense of virtual simulation.Firstly the virtual scene image jittering phenomenon of simulation training system is introduced in this paper.And then the internal reason is analyzed,pointing out that the jointly effect consisting of the diversity of simulation grading of different models and the randomness of net delays result in time-space inconsistency problem of the distributed system which furthermore results in high frequency jittering of simulation data.when the average amplitude of jittering data exceeds some value defined as threshold value,the jittering data is showed as the visual jittering of virtual scene.Based above analysis,the relationship between the distance of entities and the threshold is measured,and the correct way of elimination of image jittering is reasoned.Lastly the elimination method of image jittering of virtual scene is proposed and its validation is proved.
When carrying on the training of element tactics based on the flight simulator system,it is found that the image jittering occurred while watching remote simulator from local simulator virtual scene.It badly affects the immersion sense of virtual simulation.Firstly the virtual scene image jittering phenomenon of simulation training system is introduced in this paper.And then the internal reason is analyzed,pointing out that the jointly effect consisting of the diversity of simulation grading of different models and the randomness of net delays result in time-space inconsistency problem of the distributed system which furthermore results in high frequency jittering of simulation data.when the average amplitude of jittering data exceeds some value defined as threshold value,the jittering data is showed as the visual jittering of virtual scene.Based above analysis,the relationship between the distance of entities and the threshold is measured,and the correct way of elimination of image jittering is reasoned.Lastly the elimination method of image jittering of virtual scene is proposed and its validation is proved.
引文
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[3]Mazuryk T,Gervautz M.Two-Step Prediction and image Deflection for Exact Head Tracing in Virtual Environment[A].Computer Graphics Forum[C].1995,14(3):29-41.
[4]李尚林,郑利平,张静,等.数字地球渲染中单精度浮点数误差改正[J].中国图象图形学报,2014,17(1):119-125.
[5]徐勇波,王行仁,贾荣珍.飞行仿真器联网仿真视景图像抖动研究[J].系统仿真学报,2005,17(2):414-420
[6]陈学文,张炎.载人飞行器在轨视景图像抖动研究[J].系统仿真学报,2013,25(7):1592-1597
[7]王炜,刘少华,高辉,等.飞参驱动的虚拟飞行再现系统设计与实现[J].系统仿真学报,2007,19(9):2000-2007
[8]徐春蕾.大规模分布式虚拟环境的时空一致性[D].长沙:国防科技大学,2006,
[9]彭宇行,张拥军,李思昆.分布式虚拟环境的时空一致性研究[J].电子学报,2005,33(2):313-316.
[10]蓝集明,熊刚,张海燕.幅相二元距离加权的自适应滑动平均滤波[J].计算机工程与应用,2012,48(10):141-145.