空间飞行器

As a kind of near space vehicle, stratospheric airship attracts growing attention from countries with advanced aviation technologies.

作为临近空间飞行器的一种，平流层飞艇越来越受世界各航空航天大国的重视。

On this base,it is proposed that automatic collision avoidance technique should be adopted for nearspace aerocraft s.

在分析机载平台空中防撞系统的发展历程和技术特点的基础上，提出了在临近空间飞行器上采用自动防撞技术。

In chapter two, using the hydrodynamical equations for electrons and Maxwell equation and through complicated calculation, we finally obtain a set of equations which describe the non-steady and nonlinear interactions between plasma and field in the wake region of a moving body in space.

第二章是从描述电子的磁流体方程和麦克斯韦方程出发，通过计算，最后得到了一组在考虑非静态极限下描述空间飞行器远尾区内等离子体与场之间的非稳态非线性相互作用耦合方程。

A real-time synchro-division set is provided, that can receive high speed telemetric baseband signals from spacecraft.

提供一种用于接收空间飞行器高速遥测基带信号的实时同步分路装置。

Objective To study the method of preventing dewing on the cabin wall of a spacecraft.

目的 探讨防止载人空间飞行器舱内结露的方法。

Based on probability theory, a method for describing and calculating the collision probability between rendezvous and docking vehicle and debris is presented, and the method involves quantitatively analyzing the collision probability using quasi maximum instantaneous collision probability and total collision probability. The method calculating the indexes is developed, and the input required to perform a calculation includes the respective state vectors, position error covariance matrices and physical sizes of objects involved.(3) Two methods to analyze relative trajectory safety between chaser and target are developed, which are 3-sigma ellipsoid based methodology and collision probability based methodology.

1分析了交会对接各阶段面临的主要轨迹安全威胁，阐述了被动和主动安全策略、目标器的交会对接控制区域等保证交会安全的措施；(2)基于概率思想发展了线性和非线性运动情况下飞行器与空间碎片的碰撞判断方法，提出采用总碰撞概率和拟最大瞬时碰撞概率来综合描述飞行器与空间碎片的碰撞危险程度，推导了通过飞行器和空间碎片各自的状态矢量、位置误差协方差矩阵以及形状尺寸来计算碰撞概率的公式；(3)提出了两种分析追踪器和目标器之间相对轨迹安全的新方法：基于3σ椭球的轨迹安全分析方法和基于碰撞概率的轨迹安全分析方法。

Because the specific impulse of electric propulsion is ten times more than the chemistry propulsion, it appears very important in the application of satellite attitude control and station keeping, aerocraft deep space exploring and interstellar travelling. It can increase the payload and extend life, decrease the passive weight.

由于电推进的比冲比化学推进比冲高出一个数量级，因而在卫星姿态控制、位置保持以及空间飞行器深空探索、星际航行的应用中有重要意义，它或可以提高有效载荷、延长寿命，或可以降低消极质量。

Based on the mass models of the liquid propellamt engine thrust system, an approach has been presented for the optimization of the locality arrangement of the bipropellant attitude control engines.

在液体推进剂动力系统质量模型的基础上，针对采用双组元推进剂和挤压式输送系统的小推力空间飞行器姿控发动机，在控制总冲量和总冲量矩相同的情况下，对动力系统总质量最轻的姿控发动机最优布局方式进行了优化分

VTOL aircraft is an under-actuated system with three degrees of freedom and two control inputs.

引言1VTOL空间飞行器是能够垂直起飞、垂直着陆的具有三个自由度，两个控制输入的欠驱动系统。

The trajectory tracking control for the under-actuated VTOL aircraft with any input coupling was addressed.

研究了欠驱动VTOL空间飞行器在各种输入耦合时的非线性跟踪控制问题。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了