Space industry hopes tied to space shuttle

1973 ◽  
Vol 51 (4) ◽  
pp. 28
Keyword(s):  
Space Shuttle ◽  
Space Industry

Research on Opening and Closing Synchronization of Flexible Hatch on Space Shuttle

2018 ◽  
Vol 12 (3) ◽  
pp. 55-68
Author(s):  
Yue Wang ◽  
Hong Liu ◽  
Bo Peng
Keyword(s):  
Space Shuttle ◽  
Basic Theory ◽  
Flexible Body ◽  
Position Accuracy ◽  
Space Industry ◽  
Key Points ◽  
Substitution Principle ◽  
Opening And Closing

The space industry is developing rapidly, specifically with the development of the space shuttle. The position accuracy of the shuttle hatch is always a key problem when the space shuttle is in orbit. When hatch position accuracy meets the requirement of the central lock acquisition domain, the central lock can capture and lock, otherwise it will cause the hatch to not close properly. Aiming at this problem, this article solves it by using the basic theory of flexible body ADAMS. First, composite hatches are converted into an equivalent shell by using the equal stiffness substitution principle, deriving the neutral file (MNF) of the hatch by a classical module in ANSYS, and testing synchronization and accuracy of it under the condition of ideal rigidity and flexibility. Eventually, we obtain the curve of motion displacement at key points, then we can estimate whether the synchronization and accuracy of the hatch meets the requirements.

The effect of back-melting on the continuity of crystallographic orientation and composition in HgZnTe

1992 ◽  
Vol 50 (2) ◽  
pp. 1696-1697
Author(s):  
H.J. Zuo ◽  
M.W. Price ◽  
R.D. Griffin ◽  
R.A. Andrews ◽  
G.M. Janowski
Keyword(s):  
Directional Solidification ◽  
Space Shuttle ◽  
Solidification Process ◽  
Space Experiment ◽  
Infrared Detection ◽  
Directionally Solidified ◽  
Crystallographic Defects ◽  
Semiconducting Alloys ◽  
Uniform Composition ◽  
Growth Experiments

The II-VI semiconducting alloys, such as mercury zinc telluride (MZT), have become the materials of choice for numerous infrared detection applications. However, compositional inhomogeneities and crystallographic imperfections adversly affect the performance of MZT infrared detectors. One source of imperfections in MZT is gravity-induced convection during directional solidification. Crystal growth experiments conducted in space should minimize gravity-induced convection and thereby the density of related crystallographic defects. The limited amount of time available during Space Shuttle experiments and the need for a sample of uniform composition requires the elimination of the initial composition transient which occurs in directionally solidified alloys. One method of eluding this initial transient involves directionally solidifying a portion of the sample and then quenching the remainder prior to the space experiment. During the space experiment, the MZT sample is back-melted to exactly the point at which directional solidification was stopped on earth. The directional solidification process then continues.

Upgrades to the caution and warning system of the space shuttle

2003 ◽  
Author(s):  
Jeffrey W. McCandless ◽  
Robert S. McCann ◽  
Bruce R. Hilty
Keyword(s):  
Space Shuttle ◽  
Warning System

Features of the development of an unmanned rocket-culture technology in the first half of the twentieth century

2018 ◽  
pp. 135-144
Author(s):  
O. O. Gubka
Keyword(s):  
Twentieth Century ◽  
Subsequent Formation ◽  
Technical Schools ◽  
Space Industry ◽  
The World ◽  
Culture Technology

The features of unmanned rocket and space engineering´s development in the USSR and in the world in the first half of the XX century were considered in the article. They defined subsequent formation of scientific and technical schools in the rocket and space industry.

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