基于高速摄像弹道跟踪原理的弹丸章动角测试方法

Research on Measuring Method of Nutation Angle of Projectile Based on Trajectory Tracking with High Speed Photography

弹丸章动角是影响火炮射击密集度的重要因素之一,一直是火炮研究领域的热点问题。为得到弹丸出炮口段附近弹丸章动角测试结果,采用基于高速摄像的弹道跟踪法开展弹丸章动角测试方法研究。利用高速数字摄像机和弹道跟踪架建立弹道跟踪系统,记录弹丸飞行轨迹图像,借助于图像分析软件获得弹丸上下章动角测试结果。采用弹道跟踪系统对某火炮弹丸进行实例验证,得到弹丸出炮口段附近弹丸上下章动规律,各发弹丸之间弹丸章动角数值分散性较大,第1发弹丸章动角最大值为-5.2°.研究结果表明,弹道跟踪法是获取弹丸章动角测试结果的理想方法。

The nutation angle of projectile is one of the important factors which influence the firing dispersion, and has been a hot issue in the gun research field. In order to get the measurement result of nutation angle near the exit position of projectile, the trajectory tracking method with high speed photography is used to research the nutation angle of projectilel A trajectory tracking system is presented with the high speed photography and the trajectory tracking mount. The image of the projectile flight trajectory is recor ded, and the nutation angle of the up-and-down nutation of projectile is got by means of the image analy- sis software. An example of a gun projectile is demonstrated with the trajectory tracking system, and the rule of up-and-down nutation of projectile near exit position is obtained. The data dispersity of nutation angles for different projectiles is large, and the maximum nutation angle of the first projectile is - 5.2°. It is shown that the trajectory tracking method is a perfect method for getting the measurement result of the nutation angle.