应用高速莫尔形貌法测量飞弹偏角

APPLYING HIGH SPEED MOIRE TOPOGRAPHY TO MEASURING THE YAW ANGLE OF A FREE-FLIGHT PROJECTILE

本文提出了利用飞弹表面的高速莫尔形貌所包含的三维信息测量飞弹偏角的新方法。对于攻角而言,该方法可以从一张照片上,同时判读得到飞弹攻角在两个垂直面内的分量,从而简化了实验设备。文中,推导了有关计算公式,并对各个参数进行了误差分析;介绍了从静态到动态莫尔形貌的三步实验。实弹结果表明,用该方法可以精确地测量飞弹攻角。

It is the purpose of this paper to describe a new optical method to measure the yaw angle of a free-flight projectile with the high-speed Moire topography of the shadow type by the threedimentional information of the Moire topography on the surface of the projectile. It is undoubted that the equipment can be simplified, for it needs only one camera., but the older ones need two at least. The formulae of the calculation are deduced and the errors are analyzed. The final experimental results of a free-flight projectile by the new method above mentioned show that the yaw angle of a free-flight projectile can be measured accurately with the dynamic moire topography on the surface of the projectile. This new method is available.