reasonable amount of time, an accelerated life test at high temperatures is used . This type of accelerated test is based on the observation that ...
NASA Website
Accelerated Testing and On-Sun Failure of CPV Die-attach. Presentation on CPV accelerated reliability testing.
Energy Citations Database
The results of accelerated stress testing of four different types of silicon terrestrial solar cells
NASA Technical Reports Server (NTRS)
... IGNITERS, AGING(MATERIALS), FAILURE, RATES, RELIABILITY, SURVEILLANCE, ACCELERATED TESTING, PYROTECHNICS, PYROGENS. ...
DTIC Science & Technology
governing variables to achieve high reliability in the Stirling Radioisotope ..... approach would be to perform accelerated life testing at elevated ...
... "* System failure mode analysis "* Classification and ranking of failure modes in terms of influence and frequency of occurrence ...
... for a pulse transformer as is required by a high-power quasi ... reliability testing, the pulsed character is useful in that accelerated life testing is feasible ...
... Descriptors : *Army research, *Applied mathematics, *Model theory, *Reliability, *Life tests, Operations research, Accelerated testing, Bayes ...
... RProduc, by the MI 7 97 for Federal Scientific & rec ii . ... There is thus, a strong need for reliable accelerated test metho,,s. Many accelerated tests ...
The study is addressed to the development of accelerated reliability test methods for long lived mechanical and electromechanical parts. The parts studied were a subminiature snap-action switch, a crystal can relay, a mechanical seal, and a rubber timing ...
National Technical Information Service (NTIS)
cooker stress and an estimation made of the percentage of AR coating .... The measured I cells are currently undergoing pressure cooker tests and ...
... The approach employed herein included: System failure mode analysis, Classification and ranking of failure modes in terms of influence and ...
... ACTIVATION ENERGY AND TIME, ACCELERATED-LIFE TESTS ACCURATELY DETERMINE THE INFANT-MORTALITY RATE OF PLASTIC ...
... the grant is the development of methods ... Accelerated life testing; Reliability growth models; Inference ... life of gun barrels; Competing risk theory. (kr). ...
A review is made of the trend in instrumentation requirements as it pertains to testing in the aerospace industry. Because of the accelerating pace of technological advance, the test engineer is faced with compounding demands for increased accuracy, incre...
... where k is the number of levels of the test factor. The X's were developed so that the ' values are integers for the u values associated with the test. ...
Presentation on step-stress accelerated degradation testing (SSADT) for photovoltaics (PV). Developed are a step-stress degradation test (SSADT) for PV reliability tests and a lifetime prediction model for PV products.
DOE Information Bridge
The topic of this thesis is reliability testing of mechanical components, in which wear is a dominant failure mechanism. As the time to failure is often much longer than the time available for testing, the test must be accelerated. An important part of th...
The authors examine the layout and design features of the accelerating tube of a pulse electron accelerator. Results of tests of the partition insulator of the tube for an accelerating voltage of 1 MV, a beam current of 50 kA, and a pulse duration of ca. 5 ..mu..sec are given. Tests of the ...
Reported is a program to investigate the reliability attributes of terrestrial solar cells. The accelerated stress test results obtained on all cells since the inception of the program are summarized, as well as specific results obtained during the fourth...
This technical report documents a test-to-failure protocol that may be used to obtain quantitative information about the reliability of photovoltaic modules using accelerated testing in environmental temperature-humidity chambers.
Long term tests to 30,000 hours were continuted to provide correlation data for accelerated test results. A theory of life governing processes for electronic parts is given. The data are analyzed and presented to provide estimates of the life governing pr...
This paper reviews the accelerated thermal cycling test methods that are currently used by industry to characterize the interconnect reliability of commercial-off-the-shelf (COTS) ball grid array (BGA) and chip scale package (CSP) assemblies. Acceleration...
stearate lubricant. Erratic friction on startup; uneven lube during test. Reliability problem for flight units; major rework if failure. Foil bearings for ...
When the reliability of capacitors is evaluated, a highly accelerated life test (HALT) is usually adopted since it is a time-efficient method of determining ...
Materials The type of optical materials acceptable for use in CPV is a subject of controversy. Each company must develop its own accelerated test, slowing product development....
National Renewable Energy Laboratory (NREL)
This paper describes the needs, reasoning, approaches, and technical details to establish a practical accelerated weathering test (AWT) protocol for indoor testing of the photothermal stability of encapsulation materials and encapsulated solar cells and minimodules.
Reliability of CPV systems' materials is not well known; methods for accelerated UV testing have not been developed. UV and IR spectra transmitted through representative optical systems are evaluated.
This study was conducted to develop techniques to reduce test time, sample size and cost involved in the demonstration of the reliability of long lived nonelectronic parts. It was also the purpose of this study to validate the findings reported in RADC-TR...
... r where the sum !a over all rnm comparisons. To test the hypothesis H :X- Y 0 st ... Reliability test data from tests under overstress con- Testing ditions. ...
The main features are described of the ten presently operating large HVEC tandem accelerators and of four additional HVEC accelerators which are in different stages of testing, construction or planning. Present performance characteristics are discussed as well as available information about long term reliability. ...
To verify the 15-year reliability of the Navy half-watt radioisotope thermoelectric generator (RTG),
Although RF accelerated life testing of the RF devices would be optimal, it is quite ..... and compound semiconductor devices such as Gallium Nitride (GaN) FETs ...
important Weibull parameters, highly accelerated life test data, and sample size issues. The goal of this research effort was to determine if any of the ...
... The additional work required to produce and qualify these insulator materials for reliable and cost effective high-energy railgun utilization was ...
... 6.5.2.1 Distributions for Fitting Accelerated Test Dta. ... CR measurements as independent variables fit "better" (as ... The above model fits aboat as well ...
... of transducers to provide experimental methods for early discovery of problems that would detrimentally affect their reliability and useful life cycle. ...
Testing a Kevlar/Epoxy COPV Using Temperature and Pressure Acceleration. S. Leigh Phoenix. Cornell University. Ithaca, New York 14853. Michael T. Kezirian ...
High reliability in this context is limited to parts designed and fabricated ... though rooted in the results of destructive and accelerated life testing, ...
With over 6,000 pages, weibull.com is a comprehensive website devoted entirely to reliability engineering. It includes sections on Weibull Analysis, Accelerated Testing, System Reliability, Reliability Growth, FMEA & FMECA as well as reliability eTextbooks, case ...
NSDL National Science Digital Library
The test program described in this plan is designed to evaluate both approved and proposed solar collector test procedures and to correlate laboratory, accelerated field and simulated operational exposures with actual field data. The tests and exposure pr...
Progress accomplished during the fourth quarter of FY80 in the Sonar Transducer Reliability Improvement Program (STRIP) is reported. Each of the 6 major task areas is discussed in detail. Goals completed this quarter include: Accelerated life testing (ALT...
The devicefailure mechanismhasbeenanalyzedand its impact ..... in the reliability tests of Be doped GaAs Esaki tunnel diodes [22]. The values of AE_ and AE_ are .... Since hydrogen always exists during the device growth and fabrication, ...
Upper temperature limits to accelerated stress testing of plastic-encapsulated integrated circuits were determined and evidence of chip-encapsulant interaction was obtained. Possible yield-reliability correlations were considered and alternatives to MIL-M...
During the past several years, there has been tremendous progress on the development of the RF system and accelerating structures for a Next Linear Collider (NLC). Developments include high-power klystrons, RF pulse-compression systems and damped/detuned accelerator structures to reduce wakefields. In order to integrate these separate development efforts ...
NASA's highly reliable, low-cost liquid-applied coating offers ... als Science Laboratory and Beach Corrosion Test Site. Early ... Accelerated life tests, tests with chlorides to simulate contamination, and compound ...
The study is concerned with the development of techniques for the testing of electromechanical components in time compressed form. The motivating basis for this work is that presently used statistical testing methods require large numbers of samples and l...
The final Environmental Test (EMI)Electromagnetic Interference in Phase II - Confirmatory Samples was completed. The Accelerated Confirmatory Life Test (REL)Reliability(Testing) was continued through 1749 hours. The majority of the CRT assemblies did not ...
Test - Kurt Scott (Atlas) PVEL's Reliability Demonstration Test - Jenya Meydbray (PV Evolution) UV-Thermal Combined Stress Acceleration test - Takuya Doi (AIST) Session V....
The system burn-in test discussed involves the 'preconditioning' of assemblies and the accelerated power-on tests performed on electrical and electronic equipments subjected to temperature, vibration, voltage, and humidity cycling in an environmental chamber. An approach which permits prediction, assessment, and control of equipment ...
NASA Astrophysics Data System (ADS)
: Product reliability improvement depends on the adequate use of design experiments. Should this task be managed by a specific product design methodology that realizes the role of statistical designed experiments on product reliability improvement then the design process truly receives the benefits of robust design. A methodology for integrate ...
E-print Network
Verifying the reliability of engines for prolonged service life by conducting protracted tests for a given service life does not assure rapid rates of growth of service life. To accelerate the rate of growth of service life and check on the capabilities o...
Goal was Assembly Test Chips (ATCs) which could be used for evaluating plastic encapsulation technologies. Circuits were demonstrated for measuring Au-Al wirebond and Al metal corrosion failure rates during accelerated temperature and humidity testing. Th...
... Accession Number : ADD878579. Title : RELIABILITY OF CRT: ITS LIFE AND ACCELERATION EVALUATION METHOD. Corporate Author : ...
... Accession Number : AD0264040. Title : PROGRAM PLAN. MIDAS ACCELERATED RELIABILITY PROGRAM. VEHICLE C AND C EQUIPMENT. ...
... Descriptors : *HYDRAULIC SERVOMECHANISMS, HIGH TEMPERATURE, PERFORMANCE(ENGINEERING), ACCELERATION, RELIABILITY ...
During the past several years, there has been tremendous progress the development of the RF system and accelerating structures for a Next Linear Collider (NLC). Developments include high-power klystrons, RF pulse compression systems and damped/detuned accelerator structures to reduce wakefields. In order to integrate these separate development efforts into ...
This dissertation tests models of relativistic electron acceleration in the earth's outer radiation belt. The models fall into two categories: external and internal. External acceleration models transport and accelerate electrons from a source region in the outer magnetosphere to the inner magnetosphere. Internal ...
Long term reliability is critical for a detector module to be used in applications that can not afford failure and require high accuracy such as medical imaging and homeland security. In this study, we report the reliability of pixellated Cadmium Zinc Telluride (CZT) detector modules fabricated from crystals grown by the Traveling Heater Method (THM). The ...
A Comuta Van produced by Commuter Vehicles, Inc., for the United States Postal Service was performance-tested by the Tennessee Valley Authority at its Electric Vehicle Test Facility. The Comuta Van was tested for acceleration, top speed, gradability, and driving range under both constant speed and stop/start ...
An analysis is made of the possibility of estimating reliably the service life of injection lasers from the results of accelerated tests carried out at elevated temperatures. An expression is obtained for the test acceleration coefficient under the following assumptions: the distribution of the ...
Efforts in the development of reliability/durability tests for solar collectors and their materials have been hampered by the lack of real time and accelerated degradation data that can be correlated with in-use conditions. In 1977, the Solar Collector Reliability/Durability Test Program was ...
Accelerated testing of C67 Case Size 1 Monolythic capacitors of the improved version continues to demonstrate the long-life capability of this capacitor at use conditions. Procedures for selecting these long life capacitors were continued during this peri...
Accelerated testing of C67 Case Size I Monolythic capacitors from Lot No. 830 of the improved version continues to demonstrate the long-life capability of this capacitor at use conditions. Differences in the stability of resistance vs time characteristics...
A fast, efficient and reliable switch is the basic ingredient of a pulse power accelerator. Two switches have been proposed so far: the solid state switch, and the vacuum photodiode switch. The solid state version has been tested to some extent, albeit at...
Many materials and electronics need to be tested for the radiation environment expected at linear colliders (LCs) to improve reliability and longevity since both accelerator and detectors will be subjected to large fluences of hadrons, leptons and gammas....
Results obtained include the definition of a simplified stress test schedule for terrestrial solar cells based on the work performed during the first program year, and the design and fabrication of improved jigs and fixtures for electrical measurement and...
The history behind the design, building, and testing of an advanced automotive crash recorder is related. The program produced a reasonably accurate and reliable device which records and stores two axes of horizontal acceleration data experienced by a veh...
Accelerated aging tests such as high temperature burn-in, which are in current use on Bendix Kansas City Division's (BKC) purchased small and medium scale integrated circuits, were evaluated to determine if they are effective and necessary to ensure the required reliability. A theoretical analysis, a literature search, and a ...
When a very large particle accelerator with about 8,000 electromagnets, such as the proposed Next Linear Collider (NLC), has an 85% overall availability goal, then all these magnets and their power supplies must be highly reliable and/or quickly repairable. An interdisciplinary reliability engineering approach, more commonly applied to ...
... MISSILE RELIABILITY FROM TEST FLIGHT DATA ... and flight testing was also ... Descriptors : *STATISTICAL TESTS, RELIABILITY, GUIDED MISSILES ...
Techniques for assessing the hardware reliability of microprocessor-based products are reviewed. Models for predicting the failure rates of indifferent categories of microelectronic components, failure mechanisms, and degradation processes are examined. The failure rates of several types of microprocessor, memory and peripheral component, obtained from ...
The Fusion Materials Irradiation Test (FMIT) Facility accelerator is being designed to continuously accelerate 100-mA deuterons to 25 MeV. High vacuum pumping of the accelerator structure and beam lines will be done by ion pumps and titanium sublimation pumps. The design of the roughing system includes a Roots ...
The motivation for an increased scope and a more proactive effort in reliability research of photovoltaic modules and systems includes reducing the levelized cost of energy and gaining better confidence in the energy and financial payback for photovoltaic systems. This increased reliability and confidence will lead to greater penetration of photovoltaics ...
A key component to be used in PON systems is the power splitter. There is little information available on the reliability and lifetime of this component either under realistic field conditions or from accelerated stress testing. In the RACEa project FIRST (Fibre to the Residential Subscriber Terminal) a selection of ...
The steady state and transient thermal behavior of an electromigration test structure was analyzed. The test structure was a Sandia SHIELD (Self-stressing HIgh fregquency rELiability Device) electromigration test device manufactured by an outside vendor. This device has a high frequency oscillator circuit, a ...
Tutorial article by ReliaSoft (Issue 65, Juldy 2006). The article begins: " Step-stress testing is a very common type of accelerated testing. It is a good way to obtain failures in a relatively short amount of time. There are many variations of step-stress testing. A common type is one in which the units are ...
... a nEW PROcESS FOR THE ACCELERATION TEST AND EVALUATION OF AEROMEDICAL EQUIPMENT FOR ... acceleration Testing ...
Nickel-hydrogen (NiH2) real-time and accelerated low-earth-orbit (LEO) cycle test data at 10 C have been used to generate a model of reliability as a function of depth-of-discharge (DOD). A cycle life prediction has also been derived from the reliability equation and has been compared to a prediction generated for ...
The purpose of this study was to determine the reliability of the Actigraph GT1M (Pensacola, FL, USA) accelerometer activity count and step functions. Fifty GT1M accelerometers were initialized to collect simultaneous acceleration counts and steps data using 15-sec epochs. All reliability testing was completed ...
ERIC Educational Resources Information Center
