Because the internal structure of high-speed long-range flying objects ( hslrfo ) is so complicated and the mass distribution is extremely non-uniform, the precision of the mass characteristic parameters obtained from theoretical calculation is not enough to be applied to the practical measurement and control . the special test system for the mass characteristic parameters of high-speed long-range flying objects, therefore, is in great need and it is also necessary to study its performance 由于高速远程飞行物体的内部结构非常复杂,质量分布不均匀,在科学研究过程中进行的理论计算得到的质量特性参数与其使用要求相差甚远,基本不能作为计算和测控参数使用,因此必须研制专用的测量系统,并对测量系统的测量特性进行研究。
Base on the analysis and comparison of the existing measuring methods and the test systems of the mass characteristic parameters for the hslrfo at home and broad, an effective measuring method is developed and a reasonable measuring program is also presented, to improve the measuring precision of the mass characteristic parameter of high-speed long-range flying objects . the 3-d molding function of ug is used to design the mechanical parts of the test system, and the motion mode and path of the movable mechanical parts is also simulated with the software of ug 本文确立了一种较有效的测量方法,制定了合理的测量方案,设计并制造具有相当测量精确度的质量特性参数测量系统,并结合本测量系统的设计制造的过程,作了如下的分析研究工作:首先,采用ug软件的三维造型方式,对本测量系统的机械本体部分进行了三维实体建模,并运用该软件模拟了机械本体部分中可运动部分的运动方式及运动轨迹。
Many people in germany have noticed the fireballs, said werner walter, an amateur astronomer in mannheim who runs a web site on unexplained astronomical phenomena and a hotline for reports on unidentified flying objects " the last reported sighting was yesterday at 7 : 30 p . m . 1830 gmt in a corridor near the border of the netherlands, " he told reuters in a telephone interview 据路透社11月4日报道，很多德国人都已经注意到了这些火球，居住在该国曼海姆市的一位业余天文学家沃纳沃尔特说：“有人最近一次目睹火球的报道发生在3日下午7：30分，地点位于德国与荷兰边境附近。
