Conference paper
Topics: liquefaction, Reliability analysis, Chalos area
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233
Jun 17, 2010
06/10
by
Bean, E. E.; Hughes, W. R
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No Abstract Available
Topics: CODERS, MARINER C SPACECRAFT, RELIABILITY ANALYSIS
197
197
Jun 3, 2011
06/11
by
Smith, David E.; Zuber, Maria T
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Radio tracking of the Mars Global Surveyor spacecraft has revealed temporal changes in the long-wavelength gravity field of Mars that correlate, to first order, with the pattern expected for the seasonal redistribution of carbon dioxide between the atmosphere and surface. Detecting these gravity field changes requires isolating very small perturbations in the velocity of the spacecraft and estimating the very low degree zonal coefficients of the field. A comparison of these coefficients...
Topics: RELIABILITY ANALYSIS, RISK, CONFERENCES, LOW COST, SURVEYS
255
255
Sep 20, 2010
09/10
by
Paciesas, William S
texts
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Support was extended to the Burst and Transient Source Experiment (BATSE) which detects sources by looking for time variability, either intrinsic to a source (such as gamma ray bursts or pulsars) or induced by earth occultation. The support was in the form of testing, calibration, and data analysis software developments. The BATSE Spectral Analysis Software (BSAS) was successfully developed. An effort was led to develop matrices suitable for use with the BSAS spectral deconvolution algorithms.
Topics: COST ANALYSIS, REDUNDANCY, RELIABILITY ANALYSIS, SYSTEMS ENGINEERING, COST REDUCTION, OPTIMIZATION
257
257
Jun 9, 2011
06/11
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Burg, Cecile M.; Hill, Geoffrey A.; Brown, Sherilyn A.; Geiselhart, Karl A
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The Systems Analysis Branch at NASA Langley Research Center has investigated revolutionary Propulsion Airframe Aeroacoustics (PAA) technologies and configurations for a Blended-Wing-Body (BWB) type aircraft as part of its research for NASA s Quiet Aircraft Technology (QAT) Project. Within the context of the long-term NASA goal of reducing the perceived aircraft noise level by a factor of 4 relative to 1997 state of the art, major configuration changes in the propulsion airframe integration...
Topics: RELIABILITY ANALYSIS, FAILURE MODES, PERFORMANCE PREDICTION, PYROTECHNICS, COSTS, MECHANICAL...
There are several problems that limit the availability of modern-type helicopters that the German Army has been acquiring during the last ten years, including inspection policies, reliability, spare parts availability, and the number of personnel devoted to aircraft maintenance. The goal of this thesis is to identify factors that could lead to measurable improvement in operational availability and flight-hour supply of the German Army helicopter fleet. This research uses statistical analysis of...
Topics: simulation, design of experiments, input modeling, response surface modeling, reliability analysis
716
716
May 27, 2011
05/11
by
Luers, Philip J.; Culver, Harry L.; Plante, Jeannett
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eye 716
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With the launch of NASA's first fiber optic bus on SAMPEX in 1992, GSFC has ushered in an era of new technology development and insertion into flight programs. Predating such programs the Lewis and Clark missions and the New Millenium Program, GSFC has spearheaded the drive to use cutting edge technologies on spacecraft for three reasons: to enable next generation Space and Earth Science, to shorten spacecraft development schedules, and to reduce the cost of NASA missions. The technologies...
Topics: DESIGN ANALYSIS, ALGORITHMS, COSTS, OPTIMIZATION, ITERATION, NONLINEARITY, VALUE ENGINEERING,...
300
300
Jun 27, 2010
06/10
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Dugan, D. W
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eye 300
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Comparative performance of solid core nuclear and cryogenic chemical space propulsion systems
Topics: RANDOM VIBRATION, SPACECRAFT DESIGN, STATISTICAL DISTRIBUTIONS, RELIABILITY ANALYSIS, STATISTICAL...
229
229
Jun 2, 2011
06/11
by
Freund, Friedemann; Freund, Minoru M.; Tsay, Si-Chee; Ouzounov, Dimita
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The work performed under this proposal is based on the experimentally supported observation - or inference - that a small fraction of the oxygen anions in silicate minerals in igneous and high-grade metamorphic rocks on Earth may not be in the usual 2- oxidation state, O(sup 2-), but in a higher oxidation state, as O(sup -). If this is true, the same would likely apply to the fine dust that fills the diffuse interstellar medium. An (sup -) in a matrix of O(sup 2-) represents a defect electron...
Topics: SYSTEMS ANALYSIS, RELIABILITY ANALYSIS, MARKOV PROCESSES, FUNCTIONS (MATHEMATICS), POLYNOMIALS,...
305
305
Jul 11, 2010
07/10
by
Kuo, B. C.; Seltzer, S. B.; Singh, G.; Yackel, R. A
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An approach to digital control system design is applied to the analysis and design of a practical onboard digital attitude control system for a class of spinning vehicles characterized by a rigid body and two connected flexible appendages. The approach used is to design a continuous-data control system that will provide a satisfactory system response. Then, using the digital redesign method, a digital controller with onboard digital computer is designed to provide a digital control system whose...
Topics: REDUNDANCY, RELIABILITY ANALYSIS, TRANSITION PROBABILITIES, ANALYTIC GEOMETRY, ERROR ANALYSIS,...
In this study an attempt has been made to identify the perception on unisex clothing among the fashion designers. Further this study identifies the fashion consciousness among the fashion designers opinion, attitude and barrier on unisex clothing. A total of 90 questionnaires were distributed among the students across all the disciplines. Out of 90, 68 responded (75.55%), among the 68 respondents, 51 (75%) belongs to female community and 17 (25%) belongs to male. The age of the respondents were...
Topics: Unisex Clothing, Perception on Unisex Clothing, Conscious Among Fashion Designers & Reliability...
489
489
May 31, 2011
05/11
by
Leventis, Nicholas; Zhang, Guo-Hui; Rawashdeh, Abdel-Monem M.; Sotiriou-Leventis, Charikli
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In analogy to 4-(para-substituted benzoyl)-N-methylpyridinium cations (1-X's), the title species (2-X's, -X = -OCH3, -CH3, -H, -Br, -COCH3, -NO2) undergo two reversible, well-separated (E(sub 1/2) greater than or equal to 650 mV) one-electron reductions. The effect of substitution on the reduction potentials of 2-X's is much weaker than the effect of the same substituents on 1-X's: the Hammett rho-values are 0.80 and 0.93 for the 1st- and 2nd-e reduction of 2-X's vs. 2.3 and 3.3 for the same...
Topics: ARCHITECTURE (COMPUTERS), PARALLEL COMPUTERS, INTERFACES, RELIABILITY ANALYSIS, COMPUTER...
536
536
Jun 11, 2011
06/11
by
NON
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This custom bibliography from the NASA Scientific and Technical Information Program lists a sampling of records found in the NASA Aeronautics and Space Database. The scope of this topic includes technologies to monitor, maintain, and where possible, repair complex space systems. This area of focus is one of the enabling technologies as defined by NASA s Report of the President s Commission on Implementation of United States Space Exploration Policy, published in June 2004.
Topics: LASER DOPPLER VELOCIMETERS, QUANTITATIVE ANALYSIS, RELIABILITY ANALYSIS, DATA BASES, SIGNAL...
2,114
2.1K
Jul 11, 2010
07/10
by
Nichols, M. E
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eye 2,114
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Tabulated pressure data are presented for the orbiter fuselage, the orbiter bodyflap upper surface, and the orbiter bodyflap lower surface. For abstract, see N76-33263.
Topics: AIRBORNE/SPACEBORNE COMPUTERS, FLIGHT CONTROL, RELIABILITY ANALYSIS, CIRCUITS, COMPUTER COMPONENTS,...
508
508
Jul 11, 2010
07/10
by
Baumeister, K. J.; Rice, E. J
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eye 508
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Grazing flow and oscillatory flow in an orifice were studied in a plexiglass flow channel with a single side branch Helmholtz resonator using water as the fluid medium. An oscillatory flow was applied to the resonatory cavity, and color dyes were injected in both the orifice and the grazing flow field to record the motion of the fluid. The flow regimes associated with linear and nonlinear (high sound pressure level) impedances with and without grazing flows were recorded by a high-speed...
Topics: COMPLEX SYSTEMS, DYNAMIC STABILITY, RELIABILITY ANALYSIS, DIFFERENTIAL EQUATIONS, HIERARCHIES,...
This paper presents a method for time-dependent reliability analysis, future performance predictions and optimum maintenance strategy of coastal flood defences such as earth sea dykes subjected to changing operation conditions. The reliability analysis takes into account both the changes of hydraulic variables such as water level and wave height due to climate change and the deterioration of structural capacities such as crest freeboard loss and soil seepage length degradation over time. A...
Topics: Deterioration modelling, Flood defence, Maintenance strategy, Multi-objective optimisation,...
This presentation includes a summary of NEPP-funded deliverables for the Base-Metal Electrodes (BMEs) capacitor task, development of a general reliability model for BME capacitors, and a summary and future work.
Topics: NASA Technical Reports Server (NTRS), CAPACITORS, RELIABILITY ANALYSIS, CERAMICS, ELECTRODES,...
358
358
Jul 11, 2010
07/10
by
NON
texts
eye 358
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The selection of observation of vegetation is the primary optimization objective of the thematic mapper. The following are aspects of plans for the thematic mapper: (1) to include an appropriately modified first generation MSS in the thematic mapper mission; (2) to provide assured coverage for a minimum of six years to give agencies and other users an opportunity to justify the necessary commitment of resources for the transition into a completely valid operational phase; (3) to provide for...
Topics: NUCLEAR ENGINE FOR ROCKET VEHICLES, REACTOR SAFETY, RELIABILITY ANALYSIS, FAILURE ANALYSIS, FATIGUE...
291
291
May 31, 2011
05/11
by
Chandler, Frank; Scheiern, M.; Champion, R.; Mazurkivich, P
texts
eye 291
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To meet the goals for a next generation Reusable Launch Vehicle (RLV), a unique propulsion feed system concept was identified using crossfeed between the booster and orbiter stages that could reduce the Two-Stage-to-Orbit (TSTO) vehicle weight and Design, Development, Test and Evaluation (DDT&E) costs by approximately 25%, while increasing safety and reliability. The Main Propulsion System (MPS) crossfeed water demonstration test program addresses all activities required to reduce the risks...
Topics: GAS TURBINES, LIFE (DURABILITY), RELIABILITY ANALYSIS, WEIBULL DENSITY FUNCTIONS, PROBABILITY...
385
385
May 31, 2011
05/11
by
Freed, Michae
texts
eye 385
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Sketchy planners are designed to achieve goals in realistically complex, time-pressured, and uncertain task environments. However, the ability to manage multiple, potentially interacting tasks in such environments requires extensions to the functionality these systems typically provide. This paper identifies a number of factors affecting how interacting tasks should be prioritized, interrupted, and resumed, and then describes a sketchy planner called APEX that takes account of these factors...
Topics: FAULT TOLERANCE, RELIABILITY ENGINEERING, CONTROL SYSTEMS DESIGN, RELIABILITY ANALYSIS, SYSTEM...
We evaluate data quality issues present in Marine Corps maintenance records and develop statistical models to identify the most influential predictor variables to estimate the expected number of failures that cause a vehicle to be non-operational. When a vehicle becomes non-operational, we refer to it as a deadlining event. We analyze data collected from 3,154 Medium Tactical Vehicle Replacement (MTVR) vehicles between January 1, 2011 and December 31, 2013. Data quality issues are present in...
Topics: Medium Tactical Vehicle Replacement, MTVR, reliability, reliability analysis, Poisson regression,...
428
428
Jun 12, 2011
06/11
by
Wie, Bon
texts
eye 428
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A solar sailing mission architecture, which requires a t least ten 160-m, 300-kg solar sail spacecraft with a characteristic acceleration of 0.5 mm/sqs, is proposed as a realistic near- term option for mitigating the threat posed by near-Earth asteroids (NEAs). Its mission feasibility is demonstrated for a fictional asteroid mitigation problem created by AIAA. This problem assumes that a 200-m asteroid, designated 2004WR, was detected on July 4, 2004, and that the expected impact will occur on...
Topics: RADOME MATERIALS, CRACK PROPAGATION, RELIABILITY ANALYSIS, LIFE (DURABILITY), CERAMICS, GLASS,...
3,758
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Jul 25, 2010
07/10
by
NON
texts
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The Infrared Astronomical Satellite (IRAS) was launched January 26, 1983. During its 300-day mission, IRAS surveyed over 96 pct of the celestial sphere at four infrared wavelengths, centered approximately at 12, 25, 60, and 100 microns. This is Volume 3, The Point Source Catalog Declination Range 30 deg greater than delta greater than 0 deg.
Topics: EQUIPMENT SPECIFICATIONS, NAVIGATION AIDS, PERFORMANCE TESTS, STAR TRACKERS, ELECTRO-OPTICS, LASER...
291
291
Jul 6, 2010
07/10
by
GUDKOVA, V. A
texts
eye 291
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THE TEMPORAL EVOLUTION IS PRESENTED OF ION-SOUND TURBULENCE IN THE EARTH'S MAGNETOSPHERE. THE ORIGIN OF THE TURBULENCE IS ASSOCIATED WITH CURRENTS AND ELECTRIC FIELDS ALONG GEOMAGNETIC FIELD LINES. THE ANOMALOUS DISSIPATION OF THE LONGITUDINAL CURRENTS CAUSED BY TURBULENCE IS THE SOURCE OF GRADUAL HEATING OF THE PLASMA. THE DAMPING OF SHORT-PERIOD OSCILLATIONS OF THE MAGNETIC FIELD, CORRESPONDING TO MHD-WAVES IN THE MAGNETOSPHERE, MAY SERVE AS A DIAGNOSTIC MEASURE OF THIS PHENOMENON. AS...
Topics: FAILURE ANALYSIS, GAS TURBINES, ROTOR BLADES (TURBOMACHINERY), SERVICE LIFE, PERFORMANCE TESTS,...
This report consists of two parts. The first part briefly comments on the documentation status of two major systems at NASA#s Center for Computational Sciences, specifically the Cray C98 and the Convex C3830. The second part describes the work done on improving the performance of file transfers between the Unitree Mass Storage System running on the Convex file server and the users workstations distributed over a large georgraphic area.
Topics: NASA Technical Reports Server (NTRS), RELIABILITY ANALYSIS, CRAY COMPUTERS, WORKSTATIONS,...
1,461
1.5K
Jul 12, 2010
07/10
by
NON
texts
eye 1,461
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comment 0
No Abstract Available
Topics: MICROELECTRONICS, PHOTOELECTRON SPECTROSCOPY, RADIATION HARDENING, SILICON, SILICON DIOXIDE,...
361
361
Jul 12, 2010
07/10
by
NON
texts
eye 361
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comment 0
No Abstract Available
Topics: DEFECTS, NICKEL CADMIUM BATTERIES, RELIABILITY ANALYSIS, SPACECRAFT DESIGN, CORRELATION, FAILURE...
Electronic signal generator data based on solid state concepts were simplified or refined to meet requirements, such as reliability, simplicity, fail-safe characteristics, and the capability of withstanding environmental extremes. Pulse generators, high voltage pulse generators, oscillators, analog signal generators, square wave signal generators, and special function signal generators are described.
Topics: NASA Technical Reports Server (NTRS), OSCILLATORS, PULSE GENERATORS, SIGNAL GENERATORS, CIRCUITS,...
Results concerning the research on photomultiplier tubes required for the HEAO program are reported. The general specifications are discussed for providing a series of tests for helping the operational reliability of its application, and for permitting comparison of performance of similar types, from various manufacturers.
Topics: NASA Technical Reports Server (NTRS), HEAO, PHOTOMULTIPLIER TUBES, RELIABILITY ANALYSIS, CERAMICS,...
309
309
Jun 21, 2010
06/10
by
Holdaway, G. H.; Kemp, J. H., Jr.; Polek, T. E
texts
eye 309
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No Abstract Available
Topics: APOLLO PROJECT, EQUIPMENT SPECIFICATIONS, PROJECT MANAGEMENT, QUALITY CONTROL, RELIABILITY,...
Ten classes of parts covered in report: capacitors, crystals, diodes, fuses, inductors, microcircuits, relays, fixed resistors, transformers, and transistors. Each class is contained in separate section and includes discussion of inherent failure modes, screening rationale, general screening requirements, derating criteria, and stress-analysis data.
Topics: NASA Technical Reports Server (NTRS), CIRCUITS, ELECTRONIC EQUIPMENT, PERFORMANCE PREDICTION,...
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211
Jul 11, 2010
07/10
by
Mccauley, J. R
texts
eye 211
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There are no author-identified significiant results in this report.
Topics: FOOD, SPACE FLIGHT FEEDING, SPACE SHUTTLES, SYSTEMS ENGINEERING, LOGISTICS MANAGEMENT, PROJECT...
279
279
May 29, 2011
05/11
by
Shuler, Robert L
texts
eye 279
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The design and experimental verification of a switched RC multi-pole filter is presented. This highly compact circuit easily obtains sub-Hz, adjustable response utilizing reasonable sized on-chip components, and multiplexing the main resistor and op amp among filter stages. Design considerations for anti-aliasing, noise avoidance, and dynamic op amp compensation are presented.
Topics: CRACK PROPAGATION, DISTILLATION, DEFECTS, RELIABILITY ANALYSIS, LIFE (DURABILITY), ALUMINUM OXIDES,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), RELIABILITY ANALYSIS, LOGISTICS, PLANNING, RELIABILITY,...
General Electric Company requested a report from Jet Propulsion Laboratory which provides detailed information on failure modes, stress analysis and other reliability considerations was requested. General Electric Company's Nuclear Energy Division incorporated its information with that of the report. Routinely used, the report enables personnel time savings in establishing applicable screening test data.
Topics: NASA Technical Reports Server (NTRS), QUALITY CONTROL, RELIABILITY ANALYSIS, NUCLEAR ENERGY,...
199
199
Jul 26, 2010
07/10
by
Minnis, Patrick; Young, David F.; Sassen, Kenneth; Alvarez, Joseph M.; Grund, Christian J
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eye 199
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Cirrus cloud radiative and physical characteristics are determined using a combination of ground-based, aircraft, and satellite measurements taken as part of the First ISCCP Regional Experiment (FIRE) Cirrus Intensive Field Observations (IFO) during October and November 1986. Lidar backscatter data are used to define cloud base, center, and top heights and the corresponding temperatures. Coincident GOES 4 km visible (0.65 microns) and 8 km infrared window (11.5 microns) radiances are analyzed...
Topics: COMPUTER PROGRAMS, INTERFACES, FAILURE ANALYSIS, FAILURE MODES, FLIGHT CONTROL, RELIABILITY...
344
344
May 31, 2011
05/11
by
Waszak, Martin; Davidson, John B.; Ifju, Peter G
texts
eye 344
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Micro aerial vehicles have been the subject of continued interest and development over the last several years. The majority of current vehicle concepts rely on rigid fixed wings or rotors. An alternate design based on an aeroelastic membrane wing has also been developed that exhibits desired characteristics in flight test demonstrations, competition, and in prior aerodynamics studies. This paper presents a simulation model and an assessment of flight control characteristics of the vehicle....
Topics: FLIGHT CONTROL, SYSTEMS ENGINEERING, AUTONOMY, FLIGHT STABILITY TESTS, LINEARITY, RIDING QUALITY,...
Power/temperature step stress was applied to the Zener diode JANTX1N981B. Reliability of the device was determined. Control units were maintained for verification of the electrical parametric testing. Results are reported.
Topics: NASA Technical Reports Server (NTRS), DIODES, SEMICONDUCTOR DEVICES, STRESS ANALYSIS, COMPONENT...
The effect of power/temperature step stress when applied to a variety the zener diode JANTX2N3016B manufactured by Siemens and Motorola is reported. A total of 48 samples from each manufacturer was submitted to the process. In addition, two control sample units were maintained for verification of the electrical parametric testing.
Topics: NASA Technical Reports Server (NTRS), DIODES, STRESS ANALYSIS, THERMAL STRESSES, ACCEPTABILITY,...
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247
Jul 26, 2010
07/10
by
Hart, Ji
texts
eye 247
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The purpose of this session was to study and identify alternatives to be recommended for the science networking areas of vision; roles and responsibilities; and technical approach and transition. This presentation is represented by charts and viewgraphs only.
Topics: COMPLEX SYSTEMS, ERROR ANALYSIS, MARKOV PROCESSES, MATHEMATICAL MODELS, RELIABILITY ANALYSIS,...
Space replaceable units and payload configurations are revised to reflect increased levels of redundancy to be more consistent with current design practices. A reassessment of expendable payload design reliabilities was performed to provide a common basis for comparison with space serviceable configurations.
Topics: NASA Technical Reports Server (NTRS), DESIGN ANALYSIS, PAYLOADS, SATELLITE CONFIGURATIONS,...
226
226
May 31, 2011
05/11
by
Bensalem, Saddek; Havelund, Klau
texts
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This paper presents an improvement of a standard algorithm for detecting dead-lock potentials in multi-threaded programs, in that it reduces the number of false positives. The standard algorithm works as follows. The multi-threaded program under observation is executed, while lock and unlock events are observed. A graph of locks is built, with edges between locks symbolizing locking orders. Any cycle in the graph signifies a potential for a deadlock. The typical standard example is the group of...
Topics: AIRCRAFT ENGINES, LIFE (DURABILITY), RELIABILITY ANALYSIS, STRUCTURAL RELIABILITY, PROBABILITY...
A user's workshop for CARE 3, a reliability assessment tool designed and developed especially for the evaluation of high reliability fault tolerant digital systems, was held at NASA Langley Research Center on October 6 to 7, 1987. The main purpose of the workshop was to assess the evolutionary status of CARE 3. The activities of the workshop are documented and papers are included by user's of CARE 3 and NASA. Features and limitations of CARE 3 and comparisons to other tools are presented. The...
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, CONFERENCES, FAULT TOLERANCE, RELIABILITY...
This report documents the final reliability prediction performed on the Earth Observing System/Advanced Microwave Sounding Unit-A (EOS/AMSU-A). The A1 Module contains Channels 3 through 15, and is referred to herein as 'EOS/AMSU-A1'. The A2 Module contains Channels 1 and 2, and is referred herein as 'EOS/AMSU-A2'. The 'specified' figures were obtained from Aerojet Reports 8897-1 and 9116-1. The predicted reliability figure for the EOS/AMSU-A1 meets the specified value and provides a Mean Time...
Topics: NASA Technical Reports Server (NTRS), EARTH OBSERVING SYSTEM (EOS), MICROWAVE SOUNDING, MTBF,...
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2.3K
Jul 12, 2010
07/10
by
Cheatham, J. G.; Creason, T. L
texts
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A model single-stage fan with variable inlet guide vanes (VIGV) was designed to demonstrate efficient point operation while providing flow and pressure ratio modulation capability required for a V/STOL propulsion system. The fan stage incorporates a split-flap VIGV with an independently actuated ID flap to permit independent modulation of fan and core engine airstreams, a flow splitter integrally designed into the blade and vanes to completely segregate fan and core airstreams in order to...
Topics: FAULT TOLERANCE, MARKOV PROCESSES, RELIABILITY ANALYSIS, SYSTEMS ANALYSIS, SYSTEMS ENGINEERING,...
415
415
Jul 26, 2010
07/10
by
Danforth, Richard A
texts
eye 415
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Qualification testing of the environmental data recorder (EDR) was successfully completed. The purpose of this test was to qualify the EDR so that it could monitor segments shipped via railcar from Utah to Kennedy Space Center (KSC). The tests consisted of a transportation and a functional test. The transportation test verified EDR operation in its intended environment. The functional test verified EDR accuracy. Data from the functional test showed that the EDR accuracies complied with...
Topics: COMPUTER PROGRAMMING, COMPUTER PROGRAMS, FAULT TOLERANCE, SAFETY, SAFETY FACTORS, PROJECT PLANNING,...
No abstract available
Topics: NASA Technical Reports Server (NTRS), PAYLOADS, AEROSPACE SAFETY, RANGE SAFETY, SYSTEMS...
223
223
May 21, 2011
05/11
by
Pendley, Rex D.; Noonan, Caroline H.; Hall, Kenneth R
texts
eye 223
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The process of acceptance testing large software systems for NASA has been analyzed, and an empirical planning model of the process constructed. This model gives managers accurate predictions of the staffing needed, the productivity of a test team, and the rate at which the system will pass. Applying the model to a new system shows a high level of agreement between the model and actual performance. The model also gives managers an objective measure of process improvement.
Topics: ERROR CORRECTING CODES, FUZZY SYSTEMS, PETRI NETS, ROBOTICS, TASK PLANNING (ROBOTICS), FEASIBILITY,...
Systematic summary of factors which are involved in optimization of given structural configuration is part of report resulting from study of analysis of objective function. Predicted reliability of performance of finished structure is sharply dependent upon results of coupon tests. Optimization analysis developed by study also involves expected cost of proof testing.
Topics: NASA Technical Reports Server (NTRS), FRACTURE MECHANICS, OPTIMIZATION, PERFORMANCE PREDICTION,...
Product reliabilities are predicted from past failure rates and reasonable estimate of future failure rates. Algorithm is used to calculate probability that product will function correctly. Algorithm sums the probabilities of each survival pattern and number of permutations for that pattern, over all possible ways in which product can survive.
Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, FAILURE ANALYSIS, PERFORMANCE PREDICTION,...
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