基于平面方程的六光幕精度靶工程化建模及精度分析

针对传统几何法在六光幕精度靶测量模型解算及精度分析中因取近似结构参数而引入误差的问题,提出了基于平面方程的精确解算及精度分析法.依据工程实际,构建了高通用性的六光幕精度靶工程化测量模型及误差传递模型,系统地仿真比较了两类六幕结构中靶距及靶距误差、斜幕角度及角度误差、光源和接收对准误差等多误差源对弹丸速度及着靶坐标测量结果的影响,获得了一系列探测靶面内的测量误差分布数据,并结合实际给出了一个可满足坐标测量误差小于3 mm,相对测速误差小于0.3%指标的工程设计实例.研究结果可为六光幕精度靶的工程化设计与精度评估提供可靠的理论基础及数据参考.

Modeling and Measurement Accuracy Analysis of Six-light-screen Optical Target Based on Plane Equation

As a series of structural approximation need to be used in traditional geometry method,the model solving and accuracy analyzing of six-light-screen optical target based on this method are inaccurate.Here,a more accurate modeling and accuracy analyzing method based on plane equation was developed and a highly versatile engineering model and error transfer formula for six-light-screen optical target were deduced. Measurement accuracy decline caused by target distance and its error,light-screen tilt angle and its error,alignment error of light source and receiver,etc. were analyzed and compared under two kind of classical six-screen structural model. Sets of position and velocity measurement error distribution data and graphics in effective sensor area were acquired. A practical engineering layout of six-light-screen optical target with position measurement error less than 3 mm,and relative velocity measurement error less than0.3% was proposed. This research can provide useful theoretical basis and data reference for practical design and accuracy estimation of six-light-screen optical target.