三维空间入水弹道测量的新方法

摘要

A new method for measuring ballistic parameters of six-degree of freedom motions is presented in this paper.The measurement of six parametersincluding angular displacement and angular velocitycan be made just using accelerometers and having no need to use gyroscopes or other internal angular motion-sensing transduc-ers.The experiment models of torpedo and missile-like bodies usually experience great acceleration and deceler-ation during the period of launch and water entry.In this case accelerometer has been capable of gaining an ad-vantage over gyroscope by being able to bear shockby having small volume and mass.The schemes optimized for the location and the direction of the accelerometers used within experiment model have also been given in this paper.It is point out that at least six accelerometers must be used and the schemes of seven-accelerometernine-accelerometerand ten-accelerometer have been suggested in order to result in great accuracy of measure-ment.Concerning the slenderness of experiment modelsan analysis is given to show how to degrease the condition number of the system of equations for processing experiment dataand avoid it being ill-conditioned.%本文给出了只用加速度计不用陀螺或其它角运动敏感的传感器测量空间弹道参数的新方法。由于鱼雷导弹样武器模型在实验的发射阶段和入水阶段受到巨大的加速度和减速,同时又由于它们系长细比相当大的细长体,只用加速度计就比用陀螺有很大优越性,因为加速度计耐冲击、质量和体积都小。文中指出,为了测量六个弹道参数,至少要用六个加速度计,但为了提高试验准确度,本文也提出了用七个加速度计,九个加速度计和十个加速度计的测量方案,并提出相关的数据处理方程的解法。本文还就细长体实验模型对布置加速度计位置的限制,进行了分析,提出降低数据处理方程的条件数,避免出现病态方程和优化加速度计位置的方法。文章还给出了能得到高精度的试验数据处理方法。