航天器

重返大气层的航天器受到重力的作用。

Spacecraft which are re-entering the earth 's atmosphere are affected by g forces .

反射器通过支架牢牢地固定在航天器的侧面。

The reflector is held onto the sides of the spacecraft with a frame

美国“亚特兰蒂斯”号航天飞机上的宇航员正准备收回该航天器。

The crew of the US space shuttle Atlantis were preparing to reel in the craft .

未来30年内，美国有可能会把载人航天器送上火星。

In thirty years from now the United States should have a manned spacecraft on Mars .

它还可以坚持像检查商用飞机一样彻底检查私人载人航天器。

It could also insist on checking private manned spacecraft as thoroughly as it does commercial aircraft .

第一颗立方体卫星诞生于21世纪初，是为了让斯坦福大学的研究生能够设计、建造、测试和操作与前苏联人造卫星能力相似的航天器

The first CubeSat was created in the early 2000s , as a way of enabling Stanford graduate students to design , build , test and operate a spacecraft with similar capabilities to the USSR 's Sputnik .

2004年的《商业空间发射修正法》旨在鼓励发展私人空间飞行器和服务,规定除非私人航天器对机组人员或乘客造成严重或致命伤害，否则运输部长或联邦航空局禁止规管私人航天器的设计或运营。

The 2004 Commercial Space Launch Amendments Act , intended to encourage private space vehicles and services , prohibits the transportation secretary ( and thereby the FAA ) from regulating the design or operation of private spacecraft , unless they have resulted in a serious or fatal injury to crew or passengers .

这就是为什么这项新政策还包含了更新美国政府现行轨道碎片减缓标准的指导方针，该方针要求发射卫星或航天器的任何实体积极分析其所有行动产生空间碎片的可能性，无论是意外故障还是正常操作。

That 's why this new policy also includes directions to update the current U.S. Government Orbital Debris Mitigation Standard Practices , which already require any entity that launches a satellite or spacecraft to vigorously analyze the likelihood that any of their actions , from an unexpected failure or normal operations , will create more space debris .

《星际迷航》讲述的是一个比光速更快的航天器的故事。

Star Trek is about a spacecraft which travels faster than the speed of light .

航天器姿态确定算法IP核的设计与仿真

IP Core Design and Simulation for Spacecraft Attitude Determination Algorithm

航天器相对运动与Hill解的适用性分析

Analysis of Spacecraft Relative Motion and Applicability of Hill 's Solution

集群无人作战飞机相对导航研究GPS在多航天器相对导航和姿态确定中的应用

Relative Navigation in Unmanned Combat Aerial Vehicle The applications of GPS in a multi-spacecraft system

设计了GPS相对导航在航天器交会对接中应用的两种方案；

Two scenarios of applying GPS relative navigation for spacecraft RVD ( Rendezvous and Docking ) are proposed .

航天器多路精确稳压DC-DC变换器数字控制研究

Investigation into Digital Control of Multi-Output Full-Regulated DC-DC Converter for Spacecraft

载人航天器SPE水电解制氧系统的轻量化研究

Mass optimization of SPE oxygen generation system in manned spacecraft

纳米SiO2提高航天器环氧树脂抗原子氧剥蚀性能的试验研究

Experimental Investigation on Improving the AO-Resistant Characteristics of Epoxy Resin of Spacecraft Filled with Nano-SiO_2

本文针对双积分环节，以航天器俯仰轴姿态动力学为例，采用混合灵敏度方法，设计了H∞鲁棒控制器。

According to a class of plants containing a double-integrator , for example the pitch-axis rigid body dynamics of a spacecraft , we designed a mixed sensitivity Hinf robust controller .

以航天器在惯性坐标系下位置速度向量误差为输入量，给出了一种全状态反馈控制律，利用Lyapunov方法证明该闭环系统是渐进稳定的；

The tracing errors are required based on mean elements . The asymptotic stability of the feedback system is proved with Lyapunov method .

基于UPF的航天器自主天文导航方法

Spacecraft Autonomous Celestial Navigation Based on the Unscented Particle Filter

航天GPS接收机为航天器提供航迹、姿态、时间和相对距离等导航信息，提高航天器运行的自主性。

Spaceborne GPS Receiver combines the ability to sense space vehicle trajectory , attitude , time and relative ranging between vehicles into on package , Therefore it enhances onboard autonomy of space vehicle .

分布式航天器系统（简称DSS）由多颗微小卫星组成，通过微小卫星的相互协作来完成预定的科研、军事任务。

Distribute Spacecraft System is made up of several micro satellites , and it can complete a complex task through coordination with each other .

在小样本观测数据情况下，研究利用日地月方位信息和日月星历表进行航天器自主导航以及利用DSP实现航天器自主导航器的技术。

The orientation information of the sun , the moon and the earth , together with ephemeris are utilized to develop autonomous navigation algorithm , as well as its realization by DSP hardware .

依据Kane方程，提出带有多个柔性矩形板的复杂航天器的动力学建模方法。

Dynamic modeling method of complex spacecraft with flexible rectangular plates is obtained according to Kane 's equations .

为了对载人航天器中SPE制氧系统进行优化改进，根据热力学守恒定律、能量输运规律以及相关电化学理论，建立了系统工作过程的数学模型，通过数值模拟方法对系统进行了性能分析。

A mathematical model including thermodynamics , energy transport and electrochemistry was used to optimize the SPE oxygen generation system in a manned spacecraft .

针对带有多个挠性附件以及天线转动机构的卫星等多体航天器，利用伪坐标Lagrange方程建立了系统的姿态动力学模型。

Lagrange 's equations in quasi-coordinates are used for dynamics modeling of a multi-body spacecraft consisting of a rigid center body , several flexible appendages and an antenna .

本文首先根据再入航天器飞行高度高、速度快、飞行距离远等特点，对GPS定位方式进行选择。

First , proper way of GPS positioning are selected according to the high dynamic flight characters of re-entry spacecrafts , such as high distance from the earth , high velocity and far awy from the launching point .

本文简要概述了动力学在航天器设计领域的部分应用情况，着重体现了CAE仿真在工程设计中的应用进展。

In the paper , some successful application of dynamics in the design area of spacecraft are presented and the advance of CAE simulation technique in practical engineering is emphatically discussed .

以一种能够自适应变化的伪转动惯量，基于Lyapunov稳定定理，推导出一种模型独立的航天器自适应姿态跟踪控制律。

By use of a kind of pseudo-inertia of mass which can adjust itself adaptively , based on the Lyapunov stability theorem , a model-independent adaptive attitude tracking control law is derived .

航天器环绕小行星Ivar的运动分析

Motion analysis of spacecraft around the asteroid Ivar

微推进器是一种基于MEMS技术的新型微推进系统，主要用于微小型航天器的位置保持、姿态控制、轨道调整等。

Micro thruster is a new kind of micro propulsion system based on MEMS ( Micro-Electro-Mechanical System ), which is mainly used in micro spacecraft for keeping position , controlling orientation and adjusting orbit .