摘要
论述了利用相关信号处理技术测量弹丸速度的原理,分析了数字采样的周期对测量误差的影响。为了用较低的采样频率获得同样的测量精度,对计算得到的互相关函数进行多项式拟合。通过计算机仿真和实弹实验对所提方法进行验证,结果表明,该方法的测量精度与基于测时仪构成的测速系统相同。
The principle of bullet velocity measurement based upon the cross -correlation techniques is demonstrated. Both the theory of cross - correlation techniques and the errors come from the signal sampling frequency are discussed and analyzed. It is pointed out that the sampling errors play an important role. In order to acquire the higher measurement precision with lower sampling frequency, interpolation techniques is used. Computer simulation shows using interpolation technique can improve the measurement precision. An experiment was carried out and the this method is same as that of the system based on the analysis is verified. The measurement precision of apparatus of time measurement.
出处
《探测与控制学报》
CSCD
北大核心
2005年第1期44-46,共3页
Journal of Detection & Control
基金
陕西省教育厅基金项目资助(03CJ31)
关键词
弹丸速度
速度测量
互相关函数
多项式拟合
bullet velocity
velocity measurement
cross - correlation function
interpolation
