Abstract：Electromagnetic launcher is a new type of electrical equipment, which relies on electromagnetic energy to push projectiles out of the chamber at a very fast speed. Aiming at the problem of ballistic attitude measurement of projectile, a method of attitude measurement based on high-speed camera technology and image enhancement and edge extraction post-processing technology is proposed. Because the projectile moves very fast, this paper uses high-speed camera technology to shoot the projectile in flight. At the same time, considering the limitations of camera hardware and shooting conditions, this paper proposes an image enhancement algorithm based on gamma transform and two-type fuzzy sets to improve image contrast and clarity. Further, this paper extracts image edge based on SUSAN algorithm and morphological operation, and uses iterative polynomial fitting method based on least square principle to extract projectile attitude. Finally, the credibility of this method is verified by experiments
李松乘, 鲁军勇, 程龙, 李湘平. 电磁发射装置弹丸弹道姿态测量[J]. 电工技术学报, 2020, 35(23): 4835-4842.
Li Songcheng, Lu Junyong, Cheng Long, Li Xiangping. Research on Ballistic Attitude Measurement of Projectile in Electromagnetic Launcher. Transactions of China Electrotechnical Society, 2020, 35(23): 4835-4842.
[1] 马伟明, 肖飞, 聂世雄. 电磁发射系统中电力电子技术的应用于发展[J]. 电工技术学报, 2016, 31(19): 1-10. Ma Weiming, Xiao Fei, Nie Shixiong.Applications and development of power electronics in electromagnetic launch system[J]. Transactions of China Electrotechnical Society, 2016, 31(19): 1-10. [2] Fair H D.Electromagnetic launch science and technology in the United States enters a new era[J]. IEEE Transactions on Magnetics, 2005, 41(1): 158-164. [3] 刘旭堃, 于歆杰, 刘秀成, 等. 电磁轨道炮运行阶段系统发射效率和电枢出膛动能研究[J]. 电工技术学报, 2017, 32(2): 210-217. Liu Xukun, Yu Xinjie, Liu Xiucheng, et al.Researchers on the system launch efficiency and the armature muzzle kinetic energy of a constructed electromagnetic railgun[J]. Transactions of China Electrotechnical Society, 2017, 32(2): 210-217. [4] Ma Weiming, Lu Junyong.Thinking and study of electromagnetic launch technology[J]. IEEE Transactions on Plasma Science, 2017, 45(7): 1071-1077. [5] 常馨月, 于歆杰, 刘旭堃. 一种实现电枢出膛速度控制的电磁轨道炮脉冲电源触发策略[J]. 电工技术学报, 2018, 33(10): 2261-2267. Chang Xinyue, Yu Xinjie, Liu Xukun.A velocity-controlling triggering strategy of capacitive pulsed power supply electromagnetic railgun system[J]. Transactions of China Electrotechnical Society, 2018, 33(10): 2261-2267. [6] Chakravarthy K M, Watt T J, Bourell D L.The use of high-speed video as an in-bore diagnostic for electromagnetic launchers[J]. IEEE Transactions on Plasma Science, 2011, 39(2): 809-814. [7] Gonzalez R C, Woods R E.Digital image processing[M]. 2nd ed. Upper Saddle River: Prentice Hall, 2002. [8] Prewitt J M S. Interactive decision-making for picture processing[C]//IEEE Conference on Decision and Control including the 16th Symposium on Adaptive Processes and A Special Symposium on Fuzzy Set Theory and Applications, IEEE, 1978. [9] Pal S A, King R A.Image enhancement using smoothing with fuzzy sets[J]. IEEE Transactions on Systems Man & Cybernetics, 1981, 11(7): 494-501. [10] Zadeh L A.A fuzzy-set-theoretic interpretation of linguistic hedges[J]. Journal of Cybernetics, 1972, 2(3): 4-34. [11] Ensafi P, Tizhoosh H R.Type-2 fuzzy image enhancement[C]//International Conference Image Analysis and Recognition, Springer, Berlin, Heidelberg, 2005. [12] Chaira T.An improved medical image enhancement scheme using type II fuzzy set[J]. Applied Soft Computing, 2014, 25: 293-308. [13] 田原嫄, 黄合成, 谭庆昌, 等. 摄像机镜头畸变的研究[J]. 计算机工程与应用, 2009, 45(26): 49-52. Tian Yuanyuan, Huang Hecheng, Tan Qingchang, et al.Reacher on camera lens distortion[J]. Computer Engineering and Applications, 2009, 45(26): 49-52. [14] Mendel J M, John R I B . Type-2 fuzzy sets made simple[J]. IEEE Transactions on Fuzzy Systems, 2002, 10(2): 117-127. [15] Weber S.A general concept of fuzzy connectives, negations and implications based on t-norms and t-conorms[J]. Fuzzy Sets and Systems, 1983, 11(1-3): 103-113. [16] Yager R R.On a general class of fuzzy connectives[J]. Fuzzy Sets and Systems, 1980, 4(3): 235-242. [17] 王兆文, 李浩, 黄都, 等. 基于Matlab/GUI的汽油机缸内直接喷雾图像处理方法[J]. 农业机械学报, 2013, 44(9): 19-23. Wang Zhaowen, Li Hao, Huang Du, et al.Digital image processing method of gasoline direct injection spray based on Matlab/GUI[J]. Transactions of the Chinese Society for Agricultural Machinery, 2013, 44(9): 19-23. [18] 夏凯. 基于改进的SUSAN算法的火焰图像边缘检测研究[J]. 现代电子技术, 2015, 38(5): 58-61. Xia Kai.Research on flame image edge detection base on improved SUSAN algorithm[J]. Modern Electronics Technique, 2015, 38(5): 58-61.
2020, Vol. 35 
