Numerical Investigation of Roughness Effects on Transition on Spherical Capsules [0.03%]
数值研究粗糙度对球形胶囊过渡的影响
Stefan Hein,Alexander Theiss,Antonio Di Giovanni et al.
Stefan Hein et al.
To address the hitherto unknown mechanism of boundary-layer transition on blunt reentry capsules, the role of roughness-induced disturbance growth on a spherical-section forebody is assessed via optimal transient growth theory and direct nu...
Characterization of Freestream Disturbances in Conventional Hypersonic Wind Tunnels [0.03%]
传统高超声速风洞来流扰动特性分析
Lian Duan,Meelan M Choudhari,Amanda Chou et al.
Lian Duan et al.
While low disturbance ("quiet") hypersonic wind tunnels are believed to provide more reliable extrapolation of boundary layer transition behavior from ground to flight, the presently available quiet facilities are limited to Mach 6, moderat...
Planetary Probe Entry Atmosphere Estimation Using Synthetic Air Data System [0.03%]
基于合成风池数据的行星探测器进入大气层参数估算方法研究
Christopher D Karlgaard,Mark Schoenenberger
Christopher D Karlgaard
This paper develops an atmospheric state estimator based on inertial acceleration and angular rate measurements combined with a vehicle aerodynamic model. The approach utilizes the navigation state of the vehicle to recast the vehicle aerod...
Astronaut-induced disturbances to the microgravity environment of the Mir Space Station [0.03%]
宇航员引起的空间站微重力环境的扰动研究——以和平号为例
D J Newman,A R Amir,S M Beck
D J Newman
In preparation for the International Space Station, the Enhanced Dynamic Load Sensors Space Flight Experiment measured the forces and moments astronauts exerted on the Mir Space Station during their daily on-orbit activities to quantify the...
Three-dimensional modeling, estimation, and fault diagnosis of spacecraft air contaminants [0.03%]
航天器空气污染物的三维建模、估计与故障诊断
A P Narayan,W F Ramirez
A P Narayan
A description is given of the design and implementation of a method to track the presence of air contaminants aboard a spacecraft using an accurate physical model and of a procedure that would raise alarms when certain tolerance levels are ...
Air-quality monitoring and detection of air contamination in an enclosed environment [0.03%]
密闭空间的空气质量监测及空气污染检测
M Skliar,W F Ramirez
M Skliar
We report on the development of an air-quality monitoring and early detection system for an enclosed environment with specific emphasis on manned spacecraft. The proposed monitoring approach is based on a distributed parameter model of cont...
Computational dynamic analysis of extravehicular activity: large-mass handling [0.03%]
出舱活动的计算动态分析：大质量目标物操作分析研究
D J Newman,G Schaffner
D J Newman
Critical need for a swingby return option for early manned Mars missions [0.03%]
载人火星任务中紧急情况下的绕飞返回预案的必要性分析
J E Lyne,L W Townsend
J E Lyne
Comparative Study
Journal of spacecraft and rockets. 1998 Nov-Dec;35(6):855-6. DOI:10.2514/2.7589 1998
Design and structural analysis of highly mobile space suits and gloves [0.03%]
一种高机动性舱外服及其手套的设计与结构分析
J A Main,S W Peterson,A M Strauss
J A Main
This paper evaluates the factors that control the flexibility of fabric space-suit elements, in particular gloves, by examining a bending model of a pressurized fabric tube. Results from the model are used to evaluate the design strategies ...
Versatile fluid-mixing device for cell and tissue microgravity research applications [0.03%]
用于细胞和组织微重力研究的多功能流体混合装置
W W Wilfinger,C S Baker,E L Kunze et al.
W W Wilfinger et al.
Microgravity life-science research requires hardware that can be easily adapted to a variety of experimental designs and working environments. The Biomodule is a patented, computer-controlled fluid-mixing device that can accommodate these d...