基于正交高速摄影的人枪动态特性实验研究
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摘要
为深入了解某无托型自动步枪射击时人枪系统的实际运动情况、研究其人枪系统运动规律,采用2台正交高速摄影机同步跟踪固定在人枪系统上的标记点,获得各特征点在各自视窗中的平面运动轨迹;基于自适应阈值函数的小波阈值去噪方法,得到该自动步枪及射手在立姿射击过程中俯仰及侧偏的运动特征曲线。实验结果表明:采用正交高速摄影获得的人枪运动参数能更细致、更全面地反映射击时人枪系统的实际运动情况;射击过程中,枪膛合力的作用、自动机后坐到位的撞击和自动机复进到位的撞击对枪身运动的影响较大。
To study the actual movements and the motion law of the human-rifle system with a non-buttstock rifle in the process of shooting,the maker points tied up on the body and the rifle were captured in real time by two orthogonal high-speed photographies,and the plane trajectory of each feature point was obtained.Based on the wavelet de-noising method of an adaptive threshold function,the characteristic curves of pitching and yawing motion were obtained.Experimental results indicate that the motion parameters of the human-rifle system captured by two orthogonal high-speed photographies can reflect the actual motion of human-rifle system more detailed and more comprehensively.The resultant force in bore and the strikes caused by automatic mechanism collision at front and rear end during firing process affects the rifle motion significantly.
To study the actual movements and the motion law of the human-rifle system with a non-buttstock rifle in the process of shooting,the maker points tied up on the body and the rifle were captured in real time by two orthogonal high-speed photographies,and the plane trajectory of each feature point was obtained.Based on the wavelet de-noising method of an adaptive threshold function,the characteristic curves of pitching and yawing motion were obtained.Experimental results indicate that the motion parameters of the human-rifle system captured by two orthogonal high-speed photographies can reflect the actual motion of human-rifle system more detailed and more comprehensively.The resultant force in bore and the strikes caused by automatic mechanism collision at front and rear end during firing process affects the rifle motion significantly.
引文
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[3]包建东,王昌明,孔德仁,等.人枪运动对射击精度影响的实验研究[J].仪器仪表学报,2006,27(6):1 274-1 276.BAO Jian-dong,WANG Chang-ming,KONG De-ren,et al.Experimental research of man-gun movement influencing automatic firing accuracy[J].Chinese Journal of Scientific Instrument,2006,27(6):1 274-1 276.(in Chinese)
[4]LEE Y S,CHOI Y J,HAN K H,et al.A study on the human impulse characteristics of the standing shooting posture[J].Key Engineering Materials,2005,297:2 314-2 319.
[5]吝曼卿,夏元友,肖正学,等.弹丸侵彻高强度混凝土的高速摄影试验研究[J].岩土力学,2012,33(11):178-183.LIN Man-qing,XIA Yuan-you,XIAO Zheng-xue,et al.Experimental investigation of projectile penetrating high strength concrete target with high-speed photography[J].Rock and Soil Mechanics,2012,33(11):178-183.(in Chinese)
[6]高航,张继春,肖正学,等.利用轻气炮进行侵彻试验的高速摄影法探索[J].弹道学报,2011,23(1):75-79.(in Chinese)GAO Hang,ZHANG Ji-chun,XIAO Zheng-xue,et al.Research on projectile impacting target by means of light gas gun withspeed photography[J].Journal of Ballistics,2011,23(1):75-79.(in Chinese)
[7]吴升,张强,肖伯祥,等.一种新的光学运动捕捉数据处理方法[J].计算机应用研究,2009,26(5):1 938-1 940.WU Sheng,ZHANG Qiang,XIAO Bo-xiang,et al.New approach of capture data processing for optical motion[J].Application Research of Computer,2009,26(5):1 938-1 940.(in Chinese)
[8]BEENAMOL M,PRABAVATHY S,MOHANALIN J.Wavelet based seismic signal de-noising using shannon and tsallis entropy[J].Computers and Mathematics with Applications,2012,64(12):3 580-3 593.
[9]刘涛,曾祥利,曾军.实用小波分析[M].北京:国防工业出版社,2006.LIU Tao,ZENG Xiang-li,ZENG Jun.Practical wavelet analysis[M].Beijing:National Defense Industry Press,2006.(in Chinese)
[10]吴伟,蔡培升.基于MATLAB的小波去噪仿真[J].信息与电子工程,2008,10(5):220-222.(in Chinese)WU Wei,CAI Pei-sheng.Simulation of wavelet denoising based on MATLAB[J].Information and Electronic Engineering,2008,10(5):220-222.(in Chinese)
[11]吴光文,王昌明,包建东,等.基于自适应阈值函数的小波阈值去噪方法研究[J].电子与信息学报,2014,36(6):1 340-1 347.WU Guang-wen,WANG Chang-ming,BAO Jian-dong.A wavelet threshold de-noising algorithm research based on adaptive[J].Journal of Electronics&Information Technology,2014,36(6):1 340-1 347.(in Chinese)
[12]宫鹏涵,周克栋,康小勇,等.某自动步枪发射动力学仿真研究[J].弹道学报,2014,26(1):13-18.GONG Peng-han,ZHOU Ke-dong,KANG Xiao-yong,et al.Simulation of launch dynamics of a rifle[J].Journal of Ballistics,2014,26(1):13-18.(in Chinese)