Can you read this text??? Can you read this text? What a great way to put off an audience!!! Such attractive colours, too!

为了评估航天器上存在的反作用轮产生微振动力学环境对其有效荷载的指向精度和稳定度的影响，提出一种数值模拟航天器振动控制中激励源的新思路。以ＩｔｈａｃｏＢｗｈｅｅｌ测试实验为背景模拟功率谱数据，对航天器飞轮干扰力经典线性稳态模型进行参数识别。在此基础上，推导了飞轮干扰力功率谱函数，并采用修正傅里叶谱法得到飞轮干扰力的时程曲线，作为研究航天器隔减振系统的激励源。结果表明，模拟的时程曲线符合反作用轮干扰力作为微振动力学环境的特征

Objective To introduce and discuss the fundamentals of earned value project management Work Breakdown Structures Program plans and schedules Earned value management systems Cost and schedule variances Estimates at completion

Ion Engine and Colloid Thrusters are Electrostatic devices, because the electrostatic forces that accelerate the ions (or droplets) are also directly felt by some electrode, and this is how the structure receives thrust. We could manipulate the expression for thrust density in an ion engine

一、运载火箭 二、航天器的轨道 三、空间交会与对接

For a given mass flow m ind thrust F, we would like to minimize the running power

1. Introduction Hall thrusters are electrostatic ion accelerators in which the grid system (which serves in classical ion engines to anchor the negative charges used to accelerate the ions) is replaced with a relatively strong magnetic field perpendicular to the flow

11.1 空间站的概念和组成 11.2 空间站的导航、制导与控制

9.1 载人飞船的结构组成 9.2 载人飞船的制导与控制 9.3 载人飞船的再入返回控制

Prof. Manuel Martinez-Sanchez Page 2 of 11Bohm velocity: Why?