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空间飞行器
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  spacecraft
    Application of Collision Detection in Spacecraft Visual Simulation
    碰撞检测技术在空间飞行器视景仿真中的应用
短句来源
    Research and Design of a Spacecraft Attitude Control Simulator System
    空间飞行器姿态控制仿真试验平台系统研究与设计
短句来源
    Working on the spacecraft simulation system and its user interface, mainly on orbit dynamics model and its implementation.
    参加空间飞行器总体仿真系统及其演示环境系统设计实现工作,主要进行轨道动力学建模、轨道动力学模块的实现工作。
短句来源
    However, launching a spacecraft is a high-cost, high-risk venture.
    然而,空间飞行器的发射是一项高投入、高风险的任务。
短句来源
    Depending upon configuration, air-bearing systems provide some combination of translational and rotational freedom; the three degrees of rotational freedom provided by a spherical air bearing are ideal for investigation of spacecraft attitude dynamics and control problems.
    气浮台系统通过配置可具备若干平动或转动的自由度,采用球形气浮轴承则可以提供三轴的转动自由度,是研究空间飞行器姿态动力学与控制问题的理想平台。
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  “空间飞行器”译为未确定词的双语例句
    IR Imagery Simulation Technology of Spacevehicles
    红外成像制导空间飞行器系统仿真技术研究
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    They were successfully used in some hardwareintheloop simulating experiments of attitude control system.
    该系统已成功应用于某空间飞行器姿控系统半实物仿真试验中。
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  spacecraft
This collection can be used to test spacecraft production materials, in order to determine their resistance to biodegradation.
      
Studying Stability of the Flexible Spacecraft with a Discrete Control System
      
Stability of the spacecraft was considered with regard for its elastic structural oscillations arising under discrete control.
      
Consideration was given to the possibility of estimating jointly the motion coordinates and parameters of the elastic spacecraft using algorithms based on the discrete Kalman filtering and the theory of testing statistical hypotheses.
      
Design of the Suboptimal Profiled Relay Control of Orientation of the Spacecraft Having Elastic Structural Elements with Regard
      
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Based on analyzing of the general faults of the spacecraft,a principle and method of database technique is proposed in the spacecraft fault diagnosis.The source of the spacecraft fault information,the field design of the spacecraft fault database,the entity design of the spacecraft diagnosis database and the realization technique of the spacecraft database intelligent fault diagnosis are discussed.A new method for the application of database technique in spacecraft fault diagnosis is provided.

在对空间飞行器常见故障进行分析的基础上 ,提出了利用数据库技术对飞行器故障进行智能诊断的原理和方法 ,对飞行器故障信息的来源、飞行器故障数据库的字段设计、飞行器诊断数据库的实体设计及飞行器数据库故障智能诊断的实现技术等进行了具体介绍。为数据库技术在飞行器故障诊断中的应用提供了一种新方法。

VR(Virtual Reality) is a computer system, in which we can establish and experience virtual world. VRML (Virtual Reality Modeling Language) has offered the standard for building virtual world, being widely used in the field of e-commerce, education, engineering, building, amusement and art, and will become the foundation of virtual reality application system. Because VRML has a close connection with internet, so we can transfer simulation of space mission from PC to internet, and users can see the progress of...

VR(Virtual Reality) is a computer system, in which we can establish and experience virtual world. VRML (Virtual Reality Modeling Language) has offered the standard for building virtual world, being widely used in the field of e-commerce, education, engineering, building, amusement and art, and will become the foundation of virtual reality application system. Because VRML has a close connection with internet, so we can transfer simulation of space mission from PC to internet, and users can see the progress of space mission by this way. But building model is very difficult and fussy, from STK(Satellite Tool Kit)of AGI(Analytical Graphics, Inc.),we can get a great amount of models about spacecraft, plane, ground vehicle, station, the goal, etc. This paper introduces the characteristic of STK and VRML model file, and by analyzing model file, the way for transforming STK model file to VRML model file will be got, in order to be used in virtual world.

虚拟现实(VirtualReality,简称VR)是一种可以创建和体验虚拟世界的计算机系统。VRML(VirtualRealityModelingLan guage)为虚拟世界的建立提供了规范,VRML在电子商务、教育、工程技术、建筑、娱乐、艺术等领域的广泛应用,将会成为构建虚拟现实应用系统的基础。由于VRML与网络紧密联系,可以利用VRML技术将航天任务模拟从单机转移到网上,这样网络用户就可以从互联网上了解航天任务的进行。但是模型的建立是非常困难和繁琐的,利用美国AGI(AnalyticalGraphics,Inc.)公司开发的STK(SatelliteToolKit)就可以获得关于描绘空间飞行器、飞机、地面车辆、地面站、目标等资源丰富的模型。该文分别介绍了STK和VRML模型文件的特点,通过对两种模型文件的分析,得出如何将STK模型文件转换成为VRML模型文件的具体方法,以便在虚拟世界中应用。

Self-developed structural optimization software has the low abilities of man-machine interface and structural analysis.A structural optimization software system is constructed through PCL(PATRAN Command Language) on the base of commercial FEM software MSC.PATRAN/NASTRAN.In the new system NASTRAN performs the structural analyses and design sensitivity analysis, and a self-developed coding two-level multi-point approximation method is used for the optimization calculation,Moreover,special functions and corresponding...

Self-developed structural optimization software has the low abilities of man-machine interface and structural analysis.A structural optimization software system is constructed through PCL(PATRAN Command Language) on the base of commercial FEM software MSC.PATRAN/NASTRAN.In the new system NASTRAN performs the structural analyses and design sensitivity analysis, and a self-developed coding two-level multi-point approximation method is used for the optimization calculation,Moreover,special functions and corresponding interface for structural optimization of spacecraft are developed,which greatly expanded the capabilities of primal PATRAN/NASTRAN system.The application results of typical examples and practical engineering problem show that the developed system is effective in calculation,convenient in usage,and suitable to be applied in the structural optimization of spacecraft.

自行开发结构优化软件存在着人机界面和结构分析功能不足等弱点。在有限元软件MSC.PATRAN/NASTRAN平台上,用PATRAN的二次开发工具PCL建立了结构优化系统,此系统由NASTRAN作结构分析和敏度分析,采用自主开发的基于二级多点逼近算法的程序模块进行寻优计算,并且特别增加针对空间飞行器结构优化的特殊功能和相应前后置界面,使PATRAN/NASTRAN具有的结构优化功能得以扩展。典型算例和实际工程的应用结果表明,本程序系统计算准确快捷,使用方便,适用于航天器的结构优化。

 
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