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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Virtual reality system of manned maneuvering unit taking into consideration the disturbance from an astronaut's limbs
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This paper describes a manned maneuvering unit (MMU) virtual reality system.
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Monitoring of Microbial Degraders in Manned Space Stations
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Such a motion was used for the first time on domestic manned orbital complexes.
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The experiment was carried out on the manned Mir space station by long-term space exposure of samples of metal foil with their subsequent recovery to the Earth and detailed laboratory mass-spectrometric analysis.
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| | Re-entry of an artificial satellite is a very complicated problem. It is related to many scientific theories and technical problems. This paper discusses only the re-entry orbit. Some reasonable re-entry orbits of a manned space-ship are presented. Safe return to the earth's surface is ensured by utilizing terrestrial aerodynamical forces (drag and lifting forces), and the main point is to solve the problem of large deceleration. This work commences from the differential equations of motion of an artificial... | | 本文讨论利用地球大气动力(阻力和升力)来设计载人飞船安全返航的、主要解决超重问题的合理轨道。从卫星在地球引力和大气动力作用下的运动方程出发,先得到近似分析解(11)和(12)式。由它们得到合理解决超重(最大值小于地面重力的六倍)的两种方案:一是改变阻力;另一是用适当的小升力。然后根据这两个方案用数值方法计算了三种返航轨道。在适当选取初始值时,这三种轨道都可以合理地解决超重问题,同时也能减轻防热困难。最后讨论了地球大气扁率对返航轨道的影响,计算结果表明,它的影响是可以忽略的。 | | 文摘来源 | | The precise and real simulation of the star scene in the astronauts training in manned space-flight would help the astronauts to recognize the spacecraft orientation and the orbital coordinates with respect to star positions, and to realize spacecraft maneuvering.In this paper, the problem of visual simulation of the star scene in space-flight training is discussed. A method for star scene simulation by means of planetarium is presented, and a mathematical model based on matrix theory for star scene simulat... | | 在载人飞船的航天模拟中,正确而逼真的星象视觉模拟有助于航天员利用星位来判断飞船本身轨道飞行的情况,标识自身的空间方位,以及赖以进行机动飞行。 本文针对航天视觉模拟中,如何实现逼真的星象模拟问题进行了探讨。提出了一种采用星象仪实现星象模拟的方法。并应用矩阵理论,建立了一套星象模拟的数学模型。通过计算机解算数学模型,并实时地控制星象仪运动,将能使受训者在航天模拟中,看到精确而逼真的星空景象。 | | 文摘来源 | | In order to study the ship's manoeuverability by employing mathematical models,a double freedom motion ship simulator has recently been built in Shanghai Jiao TongUniversity. The simulator consists of a simulating pilot-house, an electro-hydraulic servocontrol system, a safeguard device,an electronic computer and other necessary de-vices. It can be used for computerized simulation of the definite manoeuver or emergencyof a particular ship under design so as to evaluate its inherent performances. It canalso ... | | 我校最近建成的二自由度载人船舶运动模拟器是仿制船舶在海上运动的地面装备。它由模拟操纵转台、电液伺服系统、安全保护系统和电子模拟计算机等组成。它可用于设计阶段模拟设计船的各种限定操纵和应急操纵,预报设计船的操纵性;亦可用于研究船舶闭环系统中各操纵环节,包括人的操纵作用等。本文简要介绍其用途、工作原理、技术指标和性能、设计特点等方面内容。 | | 文摘来源 | |   | | << 更多相关文摘 |
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