高速摄像在某强冲击试验中的试验弹测速应用研究  

Research on Velocity Measurement of Projectiles Using High-speed Photography in Strong Impact Test

作　　者：刘颖茜 姚小明 李碧波[1] LIU Yingxi;YAO Xiaoming;LI Bibo(Aircraft Strength Research Institute of China,Xi'an 710065,China)

机构地区：[1]中国飞机强度研究所,西安710065

出　　处：《机械科学与技术》2024年第5期904-910,共7页Mechanical Science and Technology for Aerospace Engineering

摘　　要：为了提高强冲击试验的试验弹测速有效性与精度,本文设计了高速摄像试验弹测速方案测量试验弹冲击前的速度。依据试验条件进行了关键设备选型并搭建了高速摄像测速系统,利用有限脉冲响应(Finite impulse response,FIR)滤波器并选取不同滤波器半长进行速度分析计算,通过“四点矫正法”解决了图像倾斜畸变。将测速结果与传统的激光测速结果进行比对,二者测试结果高度吻合(相对误差在0.5%以内)。最后由测速系统分析的3组连续出口速度证明了该强冲击试验系统具备提供稳定速度的能力。To improve the effectiveness and accuracy for measuring velocity of projectiles in strong impact test,this paper designed a type of high-speed photography velocity measurement scheme to measure the velocity before impacting of the projectile.According to the test conditions,the key equipment is selected and the high-speed photography velocity measurement system is built,the finite impulse response(FIR)filter selected different half lengths is used to calculate the velocity,and the image tilt distortion is solved by"4 Points Mode".The correctional result of the high-speed photography velocity system was compared to traditional laser test result,which proved that the two test results are highly consistent(the relative error is within 0.5%).Finally,the three groups of continuous exit velocities analyzed by the velocity measurement system prove that the strong impact test system has the ability to provide stable velocity.

关 键 词：强冲击试验 高速摄像测速系统 FIR滤波器 四点矫正法 

分 类 号：TJ3[兵器科学与技术—火炮、自动武器与弹药工程]