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Researchers from NASA and Lockheed Martin have tested software for a robotic extension device that dramatically improves astronauts' ability to perform remote tasks under adverse conditions on the International Space Station (ISS). The method was developed for use with the Special Purpose Dexterous Manipulator, which works in conjunction with the current Space Station Remote Manipulator System (SSRMS).

Posted in: Blog

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Technology Business Briefs

Small Geometry Flash EEPROM & DRAM Memory Patents These patents cover such topics as Flash EEPROM and DRAM device, high storage capacity, cell size, cell layout, product material, etching masking material, photolithography technique, narrower spacing between adjacent line patterns, high packing density of pattern line pitch, and smaller chip sizes.

Posted in: Blog

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Light-Bending



Posted in: Blog

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Free-to-Roll Testing of Airplane Models in Wind Tunnels

Causes of, and cures for, wing-drop/rock behavior can be evaluated. A free-to-roll (FTR) test technique and test rig make it possible to evaluate both the transonic performance and the wing-drop/rock behavior of a high-strength airplane model in a single wind-tunnel entry. The free-to-roll test technique is a single degree-of-motion method in which the model is free to roll about the longitudinal axis. The rolling motion is observed, recorded, and analyzed to gain insight into wing-drop/rock behavior.

Posted in: Mechanical Components, Briefs, TSP

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Cryogenic Shrouds for Testing Thermal-Insulation Panels

These shrouds enable maintenance of required thermal and mechanical conditions. Cryogenic shrouds have been designed and built for use in thermo- mechanical testing of samples of thermal- insulation panels on cryogenic vessels. In the original application for which these shrouds were specifically designed, the samples are representative of the large area thermal- insulation panels on the space-shuttle external tanks that hold liquid hydrogen and liquid oxygen, and the purpose of the testing is to demonstrate the ability of bonded layers in the panels to resist delamination under a combination of applied uniaxial mechanical loads and realistic operational temperatures. Presumably, the shrouds and the tests performed by use of them could be modified to enable similar evaluation of thermomechanical properties of thermal- insulation panels for cryogenic vessels other than the external tanks of the space shuttles.

Posted in: Physical Sciences, Briefs, TSP

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Portable Microleak-Detection System

Heating or cooling of a vacuum seal enables testing over a wide temperature range. The figure schematically depicts a portable microleak-detection system that has been built especially for use in testing hydrogen tanks made of polymer-matrix composite materials. (As used here, “microleak” signifies a leak that is too small to be detectable by the simple soap-bubble technique.) The system can also be used to test for microleaks in tanks that are made of other materials and that contain gases other than hydrogen. Results of calibration tests have shown that measurement errors are less than 10 percent for leak rates ranging from 0.3 to 200 cm3/min.

Posted in: Physical Sciences, Briefs

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Reflective Aerosol

This technology need is for an aerosol with properties that enable it to be easily launched using a pulsed jet fogger. It also must have reflectivity or other optical properties, and must be safe for human cutaneous and pulmonary contact. The aerosol should have optical properties that can be manipulated using laser light or other light sources to produce large-scale images and other visual effects. The aerosol would be used to create a large image that is visible from multiple vantage points by “painting” the aerosol from within or without in such a manner that a three-dimensional object is emulated. Respond to this TechNeed at: Email: nasatech@yet2.com Phone: 781-972-0600

Posted in: NASA Tech Needs

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