411
411
May 6, 2010
05/10
by
Atterbury, T. J.; Gerdeen, J. C.; Hulbert, L. E.; Mc Clure, G. M.; Sorenson, J. E
texts
eye 411
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Supporting structure of space-vehicle stabilized platform - minimizing weight of supporting gimbals
Topics: GIMBALS, SPACECRAFT STRUCTURES, STABILIZED PLATFORMS, GIMBAL, SPACECRAFT STRUCTURE, STABILIZED...
200
200
Jun 21, 2010
06/10
by
Mc Gee, G. W
texts
eye 200
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comment 0
Experiment in direct provision of hard copy documentation of aerospace generated technology to potential users - tables
Topics: AIR LOCKS, SEALS (STOPPERS), SPACECRAFT COMPONENTS, HIGH VACUUM, SPACECRAFT STRUCTURES
247
247
Jun 21, 2010
06/10
by
CARLSON, H. W.; GEIER, D. J.; LEE, J. B
texts
eye 247
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comment 0
No Abstract Available
Topics: SPACECRAFT COMPONENTS, SPACECRAFT STRUCTURES, STRUCTURAL ANALYSIS, COMPUTER PROGRAMS, FLOW CHARTS,...
182
182
Jul 12, 2010
07/10
by
Allen, F. G.; Gale, W. A.; Kaufman, L
texts
eye 182
favorite 1
comment 0
No Abstract Available
Topics: SPACE SHUTTLES, SPACECRAFT CONFIGURATIONS, SPACECRAFT ORBITS, SPACECRAFT MANEUVERS, SPACECRAFT...
366
366
Jul 12, 2010
07/10
by
NON
texts
eye 366
favorite 0
comment 0
No Abstract Available
Topics: APOLLO SPACECRAFT, SPACECRAFT DESIGN, WEIGHT ANALYSIS, SPACECRAFT STRUCTURES, STRUCTURAL WEIGHT,...
909
909
Jul 11, 2010
07/10
by
AUFFRET, R.; DELAHAYE, R. P
texts
eye 909
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EJECTION STATISTICS OBTAINED FROM THE AIR FORCES OF SEVEN NATIONS ARE ANALYZED, INCLUDING FIGURES ON THE INCIDENCE OF DEATH, THE INCIDENCE OF FRACTURE AND MULTIPLE FRACTURES, AND PREFERENTIAL FRACTURE SITES. A BASIC REVIEW OF THE ANATOMY OF THE SPINE IS FOLLOWED BY A DISCUSSION OF THE MECHANICS OF SPINAL FRACTURE. IT IS DIFFICULT TO DETERMINE THE STAGE OF EJECTION AT WHICH FRACTURES ARE MOST LIKELY TO OCCUR -- EXPULSION FROM THE AIRCRAFT OR LANDING -- BUT THE POSITION OF THE PILOT AT THE MOMENT...
Topics: BIOASTRONAUTICS, SPACE STATIONS, SPACECRAFT DESIGN, METEOROID HAZARDS, SPACECRAFT CONSTRUCTION...
423
423
Jun 15, 2011
06/11
by
Anderson, D. C.; Garrett, R. E
texts
eye 423
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Hardware and software systems developed to further research and education in interactive computer graphics were described, as well as several of the ongoing application-oriented projects, educational graphics programs, and graduate research projects. The software system consists of a FORTRAN 4 subroutine package, in conjunction with a PDP 11/40 minicomputer as the primary computation processor and the Imlac PDS-1 as an intelligent display processor. The package comprises a comprehensive set of...
Topics: MASS DISTRIBUTION, SPACE DEBRIS, ARTIFICIAL SATELLITES, EXPLOSIONS, FRAGMENTATION, HYPERVELOCITY...
337
337
Jul 6, 2010
07/10
by
Okuda, J
texts
eye 337
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The noise reducing effect of a muffler is deduced by means of the four-terminal constants of the equivalent electrical network of the whole muffler system. The resonator type muffler is efficient only in the region near the first resonant frequency, and the loss at the mouth of the resonator is not negligible. Estimations of this loss and of the noise reducing curve are obtained by graphical methods. When the connecting points of the resonator cavity and the pipe are in two locations or are...
Topics: MANNED SPACECRAFT, SPACECRAFT STRUCTURES, WINDOWS (APERTURES), COMPOSITE MATERIALS, NONFLAMMABLE...
The structural criteria are limited to general and mission-oriented criteria and are not configuration specific. Care was taken to ensure that the criteria will not restrict configuration development and will not establish the overall risk level. In some instances, margins of confidence are indicated, not only because experience shows them to be necessary but also because technology now permits quantitative values to be established.
Topics: NASA Technical Reports Server (NTRS), SPACE SHUTTLES, SPACECRAFT STRUCTURES, STRUCTURAL DESIGN,...
380
380
Jun 21, 2010
06/10
by
Burek, P. J
texts
eye 380
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Magnetic reversal applications to stratigraphic problems in geology
Topics: FOLDING STRUCTURES, LOOP ANTENNAS, SPACE ERECTABLE STRUCTURES, SPACECRAFT STRUCTURES, CENTRIFUGAL...
454
454
Jun 21, 2010
06/10
by
Smolak, G. R.; Stevens, N. J
texts
eye 454
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Evaluating flight performance of Z-93 white paint in SERT 2 spacecraft thermal control system by changes in paint absorptance
Topics: SPACECRAFT DESIGN, SPACECRAFT STRUCTURES, STRUCTURAL ANALYSIS, FRACTURE MECHANICS, OPTIMIZATION,...
The Robot Systems Technology Branch at NASA's Johnson Space Center collaborated with the Defense Advanced Research Projects Agency to design Robonaut, a humanoid robot developed to assist astronauts with Extra Vehicular Activities (EVA) such as space structure assembly and repair operations. By working side-by-side with astronauts or going where risks are too great for people, Robonaut is expected to expand the Space Agency s ability for construction and discovery. NASA engineers equipped...
Topics: NASA Technical Reports Server (NTRS), ROBOT SENSORS, ROBOTS, SPACECRAFT STRUCTURES, SAFETY,...
245
245
Jul 12, 2010
07/10
by
NON
texts
eye 245
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comment 0
No Abstract Available
Topics: SPACECRAFT DESIGN, SURVEYOR LUNAR PROBES, SYSTEMS ENGINEERING, UNMANNED SPACECRAFT, LUNAR...
295
295
Jul 6, 2010
07/10
by
Bugayenko, O. I.; Koval, I. K.; Krugov, V. D.; Morozhenko, A. V.; Slutskiy, L. F
texts
eye 295
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Results are given of photoelectric measurements of brightness distribution and brightness-phase dependence for six spheres whose surfaces have different colors and roughness. These results are applied to verify validity of some empirical formulas used earlier for determining optical parameters of the Martian surface.
Topics: SPACECRAFT STRUCTURES, STRUCTURAL ANALYSIS, USER MANUALS (COMPUTER PROGRAMS), COMPUTER PROGRAMMING,...
353
353
Jul 12, 2010
07/10
by
NON
texts
eye 353
favorite 0
comment 0
No Abstract Available
Topics: JUNO LAUNCH VEHICLES, SOLID PROPELLANT ROCKET ENGINES, SPACECRAFT LAUNCHING, SATELLITE DESIGN,...
320
320
May 29, 2011
05/11
by
Goorjian, Peter M.; Ning, C. Z.; Agrawal, Govin
texts
eye 320
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Transverse mode dynamics of a 20-micron-diameter vertical-cavity surface-emitting laser (VCSEL) undergoing gain switching by deep current modulation is studied numerically. The direct current (dc) level is set slightly below threshold and is modulated by a large alternating current (ac). The resulting optical pulse train and transverse-mode patterns are obtained numerically. The ac frequency is varied from 2.5 GHz to 10 GHz, and the ac amplitude is varied from one-half to four times that of the...
Topics: EDUCATION, SPACECRAFT STRUCTURES, ENGINEERING, NASA PROGRAMS, SUMMER, AIRCRAFT NOISE, SYNTHESIS...
835
835
Jul 9, 2010
07/10
by
MALKEVICH, M. S
texts
eye 835
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METHODS OF INTERPRETATION AND RESULTS OF MEASUREMENTS OF THE OPTICAL CHARACTERISTICS OF THE EARTH, OBTAINED BY MEANS OF ARTIFICIAL SATELLITES WITH THE OBJECT OF DETERMINING THE PHYSICAL PARAMETERS OF THE ATMOSPHERE, THE CLOUDS, AND THE EARTH'S SURFACE ARE DISCUSSED. THE METHODS ARE BASED ON THE USE OF A PRIORI STATISTICAL CHARACTERISTICS OF THE STRUCTURE OF FIELDS OF THE EARTH'S ATMOSPHERIC PARAMETERS. METHODS ARE PRESENTED FOR SOLVING THE PROBLEMS OF DETERMINING THE TEMPERATURE OF THE GROUND...
Topics: RESEARCH, SALYUT SPACE STATION, SPACECRAFT INSTRUMENTS, COSMONAUTS, SPACEBORNE PHOTOGRAPHY,...
335
335
Jun 21, 2010
06/10
by
Morris, J. F
texts
eye 335
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comment 0
Iterative calculation model and results for plane collisionless sheaths between field modified emitter and thermally ionized cesium plasma
Topics: BERYLLIUM ALLOYS, CONSTRUCTION MATERIALS, JOINING, METAL WORKING, COMPRESSIVE STRENGTH, SPACECRAFT...
260
260
Jul 23, 2010
07/10
by
NON
texts
eye 260
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Planetary exploration has provided a torrent of discoveries and a recognition that planets are not inert objects. This expanded view has led to the notion of comparative planetology, in which the differences and similarities among planetary objects are assessed. Solar system exploration is undergoing a change from an era of reconnaissance to one of intensive exploration and focused study. Analyses of planetary surfaces are playing a key role in this transition, especially as attention is...
Topics: ARCHITECTURE, DESIGN ANALYSIS, RESEARCH MANAGEMENT, SPACE STATIONS, STRUCTURAL DESIGN,...
NASA is moving forward with prioritized technology investments that will support NASA's exploration and science missions, while benefiting other Government agencies and the U.S. aerospace enterprise. center dotThe plan provides the guidance for NASA's space technology investments during the next four years, within the context of a 20-year horizon center dotThis plan will help ensure that NASA develops technologies that enable its 4 goals to: 1.Sustain and extend human activities in space,...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE ENGINEERING, SPACECRAFT STRUCTURES, SPACECREWS,...
352
352
Jul 9, 2010
07/10
by
Rosener, A. A.; Stephenson, M. L
texts
eye 352
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Conceptual design and fabrication of a full scale shuttle passenger couch engineering model are reported. The model was utilized to verify anthropometric dimensions, reach dimensions, ingress/egress, couch operation, storage space, restraint locations, and crew acceptability. These data were then incorported in the design of the passenger couch verification model that underwent performance tests.
Topics: SPACECRAFT STRUCTURES, SPACECRAFT TEMPERATURE, TEFLON (TRADEMARK), THERMAL CONTROL COATINGS,...
Large area pressurized meteoroid penetration detector panels with maximum inherent structural rigidity are provided. The panels measure directly the penetration rate in materials to be used in spacecraft. Panel structure include an interconnected cellular configuration in which the cells have spaced periphery welds and tufts in their centers. A spot weld is made at the center point joining the panels.
Topics: NASA Technical Reports Server (NTRS), METEORITE COLLISIONS, PANELS, PRESSURE SENSORS, SPACECRAFT...
662
662
Jun 21, 2010
06/10
by
GODAI, T., et al
texts
eye 662
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comment 0
HEAT TRANSFER IN NOZZLE OF HIGH-ALUMINIZED SOLID ROCKET
Topics: COMPUTERIZED SIMULATION, STRUCTURAL VIBRATION, DYNAMIC MODELS, LAUNCH VEHICLES, SPACECRAFT...
An assessment of two proposed Spacelab configurations with diameters of 14 and 12 feet was conducted by using two inexpensive wooden mockups containing cardboard fixtures. Also examined was an alternate mounting arrangement for the 12-foot diameter configuration, taking advantage of conforming equipment racks to the cylinder walls. A volume comparison of the three configurations was made using a life sciences payload which is considered to be one of the more voluminous payloads. It was found...
Topics: NASA Technical Reports Server (NTRS), SPACECRAFT CABIN SIMULATORS, SPACELAB, ASTRONAUTS, PAYLOADS,...
2,322
2.3K
Sep 20, 2010
09/10
by
Kosko, Bar
texts
eye 2,322
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comment 0
An introduction to fuzzy set theory is described. Topics covered include: neural networks and fuzzy systems; the dynamical systems approach to machine intelligence; intelligent behavior as adaptive model-free estimation; fuzziness versus probability; fuzzy sets; the entropy-subsethood theorem; adaptive fuzzy systems for backing up a truck-and-trailer; product-space clustering with differential competitive learning; and adaptive fuzzy system for target tracking.
Topics: ANGULAR MOMENTUM, ATTITUDE CONTROL, MANY BODY PROBLEM, MATHEMATICAL MODELS, PLANAR STRUCTURES,...
206
206
Jul 12, 2010
07/10
by
NON
texts
eye 206
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The locations of total ozone stations and of stratospheric ozone samplings were presented. The samplings are concentrated in three areas: Japan, Europe, and India. Approximately 75% of the total ozone measurements are made with Dobson instruments which offer the best international measurements. When well calibrated their accuracy is on the order of a few percent. It is found that although the total ozone percent is similar in both hemispheres, the northern hemisphere has 3 to 10% more ozone...
Topics: LOADS (FORCES), RADIATION PRESSURE, SOLAR RADIATION, SPACECRAFT STRUCTURES, DIFFUSE RADIATION,...
The results of a student project to design a lunar lander in the context of a specifically defined mission are presented. The Lunar Scout will be launched from Cape Canaveral, Florida onboard a Delta II launch vehicle. The Delta II will carry the lander and its payload to a 1367 km orbit. Once it reaches that altitude, a STAR 48A solid rocket motor will kick the spacecraft into a lunar trajectory. After burnout of the lunar insertion motor, it will be jettisoned from the spacecraft. The flight...
Topics: NASA Technical Reports Server (NTRS), LUNAR SPACECRAFT, SPACECRAFT DESIGN, UNIVERSITY PROGRAM,...
The upgraded spacecraft control section for the Small Astronomy Satellite is able to point its thrust axis to any direction in space; it can also spin or slow its outer body rotation to zero for star-locked pointing of side viewing experiments. A programmable telemetry system and delayed command system enhance the inherent capability of a spacecraft designed to be used for a variety of experiments, each of which can be built independently and attached just prior to final acceptance testing and...
Topics: NASA Technical Reports Server (NTRS), SAS, SATELLITE CONTROL, ATTITUDE (INCLINATION), SATELLITE...
214
214
Jul 26, 2010
07/10
by
Whitmore, Stephen A.; Moes, Timothy R.; Larson, Terry J
texts
eye 214
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A nonintrusive high angle-of-attack flush airdata sensing (HI-FADS) system was installed and flight-tested on the F-18 high alpha research flight vehicle. The system is a matrix of 25 pressure orifices in concentric circles on the nose of the vehicle. The orifices determine angles of attack and sideslip, Mach number, and pressure altitude. Pressure was transmitted from the orifices to an electronically scanned pressure module by lines of pneumatic tubing. The HI-FADS system was calibrated and...
Topics: DYNAMIC CHARACTERISTICS, LOADS (FORCES), MANIPULATORS, OPTIMIZATION, REDUNDANCY, SPACECRAFT...
The state of the art, criteria, and recommended practices for the theoretical and experimental analyses of discontinuity stresses and their distribution in metallic pressure vessels for space vehicles are outlined. The applicable types of pressure vessels include propellant tanks ranging from main load-carrying integral tank structure to small auxiliary tanks, storage tanks, solid propellant motor cases, high pressure gas bottles, and pressurized cabins. The major sources of discontinuity...
Topics: NASA Technical Reports Server (NTRS), DISCONTINUITY, PRESSURE VESSELS, SPACECRAFT STRUCTURES,...
The effect is reported of continued oscillations of a 1.27-cm interlocked bi-stem satellite boom. The test setup oscillated a boom continuously between set torque limits and periodically recorded its hysteresis characteristics. Results showed that repeated oscillations affected torsional characteristics and that torsional rigidity changed as a function of the number of cycles oscillated within certain torque limits. Torsional characteristics changes caused by repeated oscillations were retained.
Topics: NASA Technical Reports Server (NTRS), BOOMS (EQUIPMENT), SPACECRAFT STRUCTURES, TORSION,...
A detailed, end-to-end analysis of the activities, techniques, equipment and Shuttle provisions required to construct a reference project system is described. Included are: platform definition; construction analysis; cost and programmatics; and space construction experiments concepts.
Topics: NASA Technical Reports Server (NTRS), SPACE SHUTTLES, SPACECRAFT DESIGN, SPACECRAFT STRUCTURES,...
The equations of motion are developed which describe the dynamic interaction between the spacecraft bus and the movable appendages about a single axis. The effect is evaluated of the dynamic interaction on the attitude control subsystem with computer simulations, and design recommendations to reduce the impact of this interaction on future attitude control subsystems are presented.
Topics: NASA Technical Reports Server (NTRS), COMPUTERIZED SIMULATION, MARINER SPACECRAFT, SPACECRAFT...
Microcellular nanocomposite foams and sandwich structures have been created to have excellent electrical conductivity and radiation-resistant properties using a new method that does not involve or release any toxicity. The nanocomposite structures have been scaled up in size to 12 X 12 in. (30 X 30 cm) for components fabrication. These sandwich materials were fabricated mainly from PE, CNF, and carbon fibers. Test results indicate that they have very good compression and...
Topics: NASA Technical Reports Server (NTRS), NANOCOMPOSITES, FOAMS, SANDWICH STRUCTURES, SPACECRAFT...
454
454
Jun 15, 2011
06/11
by
Kayten, G. G
texts
eye 454
favorite 0
comment 0
No Abstract Available
Topics: DICTIONARIES, SPACE SHUTTLES, SPACECRAFT STRUCTURES, COSTS, FLIGHT TESTS, MANAGEMENT METHODS,...
Solar Concentrator Array with Refractive Linear Element Technology (SCARLET) is a joint NASA Lewis Research Center/Ballistic Missile Defense Organization program to develop advanced photovoltaic array technology for future space missions. This advanced power system technology uses a unique refractive concentrator design to focus sunlight onto a line of photovoltaic cells located below the optical element. The concentrator design is based on previous work conducted at Lewis under a Small...
Topics: NASA Technical Reports Server (NTRS), CONCENTRATORS, PHOTOVOLTAIC CELLS, SOLAR ARRAYS, SOLAR...
236
236
Jul 26, 2010
07/10
by
Anderson, Charles E
texts
eye 236
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comment 0
The number of tornado outbreak cases studied in detail was increased from the original 8. Detailed ground and aerial studies were carried out of two outbreak cases of considerable importance. It was demonstrated that multiple regression was able to predict the tornadic potential of a given thunderstorm cell by its cirrus anvil plume characteristics. It was also shown that the plume outflow intensity and the deviation of the plume alignment from storm relative winds at anvil altitude could...
Topics: CONTROL SYSTEMS DESIGN, SPACECRAFT STRUCTURES, DESIGN ANALYSIS, FAILURE ANALYSIS, FAULT TOLERANCE,...
668
668
Jun 18, 2010
06/10
by
NON
texts
eye 668
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comment 0
Rod and sheet metal fabrication of beryllium alloys for spacecraft structures
Topics: ALLOYS, BERYLLIUM ALLOY, SHEET METAL, SPACECRAFT STRUCTURE, BERYLLIUM, BERYLLIUM ALLOYS,...
Habitability design concepts for the Shuttle Orbiter Program are provided for MSC. A variety of creative solutions for the stated tasks are presented. Sketches, mock-ups, mechanicals and models are included for establishing a foundation for future development.
Topics: NASA Technical Reports Server (NTRS), HABITABILITY, SPACE SHUTTLE ORBITERS, ASTRONAUTS, HYGIENE,...
212
212
May 22, 2011
05/11
by
Rice, Robert F
texts
eye 212
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The Ballistic Missile Defense Organization has been developing the capability to evaluate one or more high-rate sensor/hardware combinations by incorporating them as payloads on a series of Miniature Seeker Technology Insertion (MSTI) flights. This publication represents the final report of a 1993 study to analyze the potential impact f data compression and of related communication system technologies on post-MSTI 3 flights. Lossless compression is considered alone and in conjunction with...
Topics: CRYSTALLOGRAPHY, STRUCTURAL STABILITY, TENSORS, SPACECRAFT STRUCTURES, STIFFNESS, STRUCTURAL...
304
304
Jul 6, 2010
07/10
by
BROCKKOETTER, G
texts
eye 304
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IN 11 UNTRAINED AND 11 HIGHLY TRAINED SUBJECTS, THE ALTERATIONS OF CELL ENZYMES, GLUCOSE, CHOLESTEROL AND 17-OH-CORTICOSTEROIDS WERE STUDIED IN RESPONSE TO PHYSICAL EXERCISE AND AS A FUNCTION OF THE PHYSICAL STATUS. THE TRAINING STATUS WAS QUANTIFIED BY MEASURING THE MAXIMUM OXYGEN UPTAKE. THE TWO GROUPS OF SUBJECTS SHOWED DIFFERENCES IN THEIR RESPONSES TO PHYSICAL EXERCISE WITH RESPECT TO ALDOLASE, GLUCOSE AND 17-OH-CORTICOSTEROIDS. THERE WAS NO EVIDENCE FOR A CLOSE RELATIONSHIP BETWEEN THE...
Topics: SPACE SHUTTLES, WEIGHT ANALYSIS, SPACECRAFT DESIGN, SPACECRAFT STRUCTURES, STRUCTURAL WEIGHT,...
Studies of the habitability of the space shuttle orbiter are briefly summarized. Selected illustrations and descriptions are presented for: crew compartment, hygiene facilities, food system and galley, and storage systems.
Topics: NASA Technical Reports Server (NTRS), HABITABILITY, SPACE SHUTTLE ORBITERS, ASTRONAUTS, HYGIENE,...
386
386
May 27, 2011
05/11
by
Peterson, Victor L
texts
eye 386
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The static aerodynamic characteristics of a canard airplane configuration having twin vertical stabilizing surfaces are presented. The model consisted of a wing and canard both of triangular plan form and aspect ratio 2 mounted on a Sears-Haack body of fineness ratio 12.5 and two swept and tapered wing-mounted vertical tails of aspect ratio 1.35. Data are presented for Mach numbers from 0.70 to 2.22 and for angles of attack from -6 to 18 deg. at 0 and 5 deg. sideslip. Tests were made with the...
Topics: DESIGN ANALYSIS, FLEXIBLE BODIES, ERRORS, CONTROLLERS, SPACECRAFT STRUCTURES, FEEDBACK CONTROL,...
Quantitative guidelines are proposed for Electrostatic Discharge (ESD) pulse shape on charged spacecraft. The guidelines are based on existing ground test data, and on a physical description of the pulsed discharge process. The guidelines are designed to predict pulse shape for surface charging and internal charging on a wide variety of spacecraft structures. The pulses depend on the area of the sample, its capacitance to ground, and the strength of the electric field in the vacuum adjacent to...
Topics: NASA Technical Reports Server (NTRS), ELECTROSTATIC CHARGE, ELECTRIC DISCHARGES, CAPACITANCE,...
The design and development of a structural dynamics model of the space shuttle are discussed. The model provides for early study of structural dynamics problems, permits evaluation of the accuracy of the structural and hydroelastic analysis methods used on test vehicles, and provides for efficiently evaluating potential cost savings in structural dynamic testing techniques. The discussion is developed around the modes in which major input forces and responses occur and the significant...
Topics: NASA Technical Reports Server (NTRS), DYNAMIC STRUCTURAL ANALYSIS, HYDROELASTICITY, SCALE MODELS,...
A collapsible support for an antenna reflector for use in supporting spacecraft antennas is described. The support has a regid base and a number of struts which are pivoted at the base. The deployment of the struts and their final configuration for supporting the antenna are illustrated.
Topics: NASA Technical Reports Server (NTRS), MECHANICAL DEVICES, SPACECRAFT ANTENNAS, STRUTS, SUPPORTS,...
A theoretical and preliminary design study of a large flexible tunnel for use at the shuttle/payload interface is discussed. The theoretical study consisted of evaluating various design concepts and determining their adaptability to the tunnel requirements. The theoretical study culminated in the selection of one concept. The selected concept was documented with preliminary drawings of a full-scale ground test model. Supporting preliminary structural, thermal, micrometeoroid, material, and...
Topics: NASA Technical Reports Server (NTRS), PAYLOADS, SPACE SHUTTLES, SPACECRAFT COMPONENTS, TRANSFER...
A low areal density protective shield apparatus, and method for making same, for protecting spacecraft structures from impact with hypervelocity objects, including a bumper member comprising a bumper ceramic layer, a bumper shock attenuator layer, and a bumper confining layer. The bumper ceramic layer can be SiC or B.sub.4 C; the bumper shock attenuator layer can be zirconia felt; and the bumper confining layer can be aluminum. A base armor member can be spaced from the bumper member and a...
Topics: NASA Technical Reports Server (NTRS), BUMPERS, CERAMICS, SPACECRAFT STRUCTURES, SPACECRAFT...
Criteria and recommended practices for preventing stress-corrosion cracking from impairing the structural integrity and flightworthiness of space vehicles are presented. The important variables affecting stress-corrosion cracking are considered to be the environment, including time and temperature; metal composition, and structure; and sustained tensile stress. For designing spacecraft structures that are free of stress-corrosion cracking for the service life of the vehicle the following rules...
Topics: NASA Technical Reports Server (NTRS), CRACKING (FRACTURING), METAL FATIGUE, SPACECRAFT STRUCTURES,...
The baseline configuration defined has the SERGE antenna panel array mounted on the OFT-2 pallet sufficiently high in the bay that negligible amounts of radiation from the beam are reflected from orbiter surfaces into the shuttle payload bay. The array is symmetrically mounted to the pallet along the array long dimension with the pallet at the center. It utilizes a graphite epoxy trusswork support structure. The antenna panels are of SEASAT engineering model design and construction. The antenna...
Topics: NASA Technical Reports Server (NTRS), ANTENNA ARRAYS, RADAR ANTENNAS, SPACE SHUTTLES, DESIGN...
