惯性测量系统火箭橇试验图像测速方法

摘要

On IMU rocket sled testing,radar and light interrupter are usually used to measure rocket sled testing's velocity and position.When rocket sled ignites,it produces high velocity,strong tail fire,large noise and vibration.Measurement of radar and light interrupter cannot get accurate velocity of rocket sled.To meet the needs of longer track and multistage ignition,Velocity measurement of photographs can cover the shortage of measurement of radar and light interrupter and improve the precision of rocket sled testing.It includes reversion of photographs,characteristic points extracting,the optimization of characteristic points' position,frequency spectrum analysis of noises on velocity and velocity calculating and smoothing,it also provides a high precise model of position and velocity on IMU rocket sled testing.%在惯性测量系统火箭橇试验中,目前主要采用雷达测量设备、遮光板时空测量装置测量橇体的运行位置和速度.火箭橇点火时,会产生高速度,强尾焰,大噪声和剧烈振动等外测条件,雷达测量设备、遮光板时空测量装置无法准确测量火箭橇运行的速度.为满足未来轨道延长和火箭橇多级点火越来越迫切的需求,提出火箭橇试验图像测速方法,弥补上述两种方法缺陷并提高速度测量的精度.研究了照片反求,特征点提取,速度噪声的频谱分析,橇体运行速度的计算值和平滑值,为惯性测量系统火箭橇试验提供高精度的位置速度变化模型.