A deployment fixture for the simulated zero- gravity testing of a large-area solar array
Design and development of deployment fixture for simulated zero gravity testing of large area solar array
James A Lackey↗
SEARCH · Search NASA
Results for “fixture”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Handling fixture for soldering round wires to FCC
Fixture holds flat conductor cable and wires in position until after soldering of contacting conductor ends and potting of junctions. Device provides for proper spacing of wires and adequate access for soldered joints during fabrication, and positions mold halves during potting operation.
Loggins, R.↗
Moment of inertia test fixture Patent
Test fixture for measuring moment of inertia of irregularly shaped body with multiple axes
Conn, J. H.↗
Machine tools and fixtures - A compilation
Technical information concerning machine tools, and fixtures
Source record↗
Review of mechanical vibration tests conducted on control moment gyros and life test fixtures
Experimental vibration studies performed on a number of flight control moment gyros and bearing life test fixtures are summarized. Tests were performed at MSFC, at Wyle Laboratories, Huntsville, Alabama, and at the Bendix Corporation facilities in Teterboro, New Jersey. A description of test and analysis equipment is included as well as test procedures and overall performance rankings. Advanced ultrasonic rolling element bearing fault detection techniques were applied for bearing analysis along with conventional vibration and sound analysis procedures.
Burchill, R. F.↗
Machine tools and fixtures: A compilation
Innovations developed by NASA, AEC, and their contractors concerning tools, adaptors, jigs, and fixtures useful in machining a wide variety of materials are presented.
Source record↗
High Temperature Strain Gage Calibration Fixture
An apparatus and method are described for calibrating high temperature strain gases which serve for both dead weight and constant deflection measurements. A cantilever support arm allows the test unit to slide into a furnace while one end is subjected to bending strain either by hanging weights upon it or by deflecting it with a push rod. The dual nature of the fixture permits both tests to be run without change of the test specimen or removal from the furnace.
Vranas, T.↗
Universal test fixture for solar cells
Coverings for solar cells are evaluated conveniently with alumina ceramic circuit board holding three pairs of cells and three field-effect translator (FET) chips overlaid with candidate encapsulant. With fixture, solar cells and encapsulants are exposed to Sunlight and weather, either natural or artificial, to provide pertinent measurement and performance data.
Kolyer, J. M.↗
Welding fixture for thin metal parts
Approach of supporting entire part contour and applying uniform pressure to joints is useful in fabricating other lightweight metal structures. Fixture has three essential components: spring-finger collet that applies pressure to joint, compressing device for tightening collet, and mandrel that supports parts. Besides preserving contour of parts, mandrel also functions as heat sink.
Mcclure, S. R.↗
Holding fixture for variable-contour parts
Array of vacuum cups on spindles holds parts for safe machining and other processings. Variable-contour part resting on fixture is held firmly enough for machining, coating, or other mechanical treatment.
Haynie, C. C.↗
Fixture for limited-access welding
Fixture consisting of screw-on expansion clamps and backup bar aligns edges of plates for precision butt welding. Tool holds plates securely, without offset, and allows welding and clamp disassembly to be completed when there is access from only one side of structure.
Tryon, J. R.↗
Fixture for assembling solar panels
Vacuum fixture attaches array of silicon solar cells to mounting plate made of clear glass which holds and protects cells. Glass plate transmits, rather than absorbs, solar energy thus cooling cells for efficient operation. Device therefore reduces handling of cells and interconnecting conductors to one operation.
Dillard, P. A.↗
Rotatable fixture for spray coating
Fixture that rotates about two axes ensures uniform coating and minimizes handling of coated workpiece. Each side of tile is coated in sequence by moving turntables until surface is perpendicular to spray. Process is repeated until desired thickness has built up.
Katvala, V.↗
Fixture for winding transformers
Bench-mounted fixture assists operator in winding toroid-shaped transformer cores. Toroid is rigidly held in place as wires are looped around. Arrangement frees both hands for rapid winding and untangling of wires that occurs when core is hand held.
Mclyman, M. T.↗
Spacecraft utensil/hand cleansing fixture
A fixture which provides a means for a crewman to perform, in zero gravity, laboratory utensil/tool cleansing and personal hygiene functions such as handwashing, shaving, body wash, and teeth brushing is described. A prototype unit developed incorporating design improvements resulting from breadboard tests in a one gravity and zero gravity environment demonstrated the capability of performing the different cleansing functions.
Jonkoniec, T. G.↗
Spacecraft utensil/hand cleansing fixture, addendum
Engineering drawings and component spec sheets used in the fabrication of the prototype spacecraft utensil/hand cleaning fixture are presented.
Jonkoniec, T. G.↗
Applications of the IITRI compression test fixture at elevated temperature
The purpose of the present paper is to describe an application of the IITRI compression test fixture at elevated temperature (589K) was described as well as the present compressive moduli and ultimate strains of HTS/PMR-15 graphite/polyimide material. Considerable care was taken in specimen fabrication to minimize back-to-back strain variations due to specimen bending. The effects of specimen width and temperature were studied for various laminate orientations. The IITRI specimen was analyzed using three dimensional finite elements to determine the magnitude and location of stress concentrations to assess their potential effects on measured moduli and ultimate strains. Stress concentrations are of concern since end constraints, free-edge effects, and thermal effects add to the three dimensional nature of stresses in a specimen.
Camarda, C. J.↗
Elevated-temperature application of the IITRI compression test fixture for graphite/polyimide filamentary composites
Seventy-nine graphite/polyimide compression specimens were tested to investigate experimentally the IITRI test method for determining compressive properties of composite materials at room and elevated temperatures (589 K (600 F)). Minor modifications were made to the standard IITRI fixture and a high degree of precision was maintained in specimen fabrication and load alignment. Specimens included four symmetric laminate orientations. Various widths were tested to evaluate the effect of width on measured modulus and strength. In most cases three specimens of each width were tested at room and elevated temperature and a polynomial regression analysis was used to reduce the data. Scatter of replicate tests and back-to-back strain variations were low, and no specimens failed by instability. Variation of specimen width had a negligible effect on the measured ultimate strengths and initial moduli of the specimens. Measured compressive strength and stiffness values were sufficiently high for the material to be considered a usable structural material at temperatures as high as 589 K (600 F).
Raju, B. B.↗