基于小波分析的水下弹丸速度测量  

Velocity Measurement of Underwater Projectile Based on Wavelet Transform

作　　者：狄长安[1] 孔德仁[1] 王昌明[1] 刘兵[1] 

机构地区：[1]南京理工大学机械学院,江苏南京210094

出　　处：《弹箭与制导学报》2004年第S5期147-149,共3页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：小波变换具有空间局部化性质,因此可利用小波变换的模极大值点检测动态测量信号的突变点。文中提出了用小波变换分析线圈靶感应电动势,寻找特征点的原理及方法,并将实弹射击实验获得的线圈靶信号,利用小波变换分析了弹丸穿越线圈靶时产生的电动势,有效的抑制了噪声对特征点判读的影响,精确判读出弹丸穿越线圈靶中性面时对应的时刻,并与直接寻找特征点的弹丸速度测量结果进行了比对,证明了该方法的可行性。One major advantage afforded by wavelets is the ability to perform local analysis in space,so wavelet transforms are well adapted for detecting an abrupt change of the signal.The principle and method of getting coil target signal's zero are brought based on wavelet transform,then the signal of coil target of gotten by experiment is analyzed by wavelet transforms.The noise is restricted in effect and the time of projectile passing the neutral surface of coil target is judged in precision.At last compared with the result of getting zero directly,feasibility of the method is proved.

关 键 词：线圈靶 速度测量 小波 弹丸 水下 

分 类 号：TJ410.6[兵器科学与技术—火炮、自动武器与弹药工程]