SpaceCubE OVERVIEW and Use of COTS Parts in Space
This presentation provides an overview of the SpaceCube data processing technology and successful use of Commercial Off-the-Shelf (COTS) parts on 11 space missions/payloads.
COTS Parts, SpaceCube↗
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Results for “cots”
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.
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Issues and Methods for Assessing COTS Reliability, Maintainability, and Availability
This discussion takes the viewpoint of how the customer can ensure the quality of COTS components.
COTS↗
Reliability Issues of COTS MEMS for Aerospace Applications
This paper reviews the current status of MEMS packaging technology from COTS to specific application provides lessons learned, and finally, identifies a need for systematic approach for this purpose.
Commercial-Off-The-Shelf↗
Design of a Fault-tolerant COTS-based Bus Architecture
In this paper, we report our experiences and findings on the design of fault-tolerant bus architecture comprised of two COT buses, the IEEE 1394 and the I***Sup 2***C.
COTS↗
Reliability Assurance for COTS Capacitors
Burn-in (BI) and life testing (LT) are the most important reliability related elements of quality assurance for components used in space systems. This presentation discusses the need of transition from the existing approach to BI, LT, and destructive physical analysis (DPA) of COTS capacitors that is based on military specifications to an alternative approach that is based on Physics of Failure and HALT.
reliability↗
A Brief History of COTS and MIL-SPEC Parts, Risk and Reliability
This presentation provides a history on the reliability of MIL-SPEC and COTS EEE parts along with a collection of major parts problems experienced under the traditional approach for parts assurance that set a baseline level of risk.
parts↗
IMACCS: A Progress Report on NASA/GSFC's COTS-Based Ground Data Systems, and their Extension into New Domains
The integrated monitoring, analysis and control commercial off-the-shelf system (IMACCS) for the provision of real-time satellite command and telemetry support, orbit and attitude determination, events prediction and data trend analysis, is considered. The upgrades made to the original commercial, off-the-shelf (COTS) prototype are described. These upgrades include automation capability, and spacecraft integration and testing capability. A further extension to the prototype is the establishment of a direct radio frequency interface to a spacecraft. The systems development approach employed is described.
Scheidker, E. J.↗
Recent radiation effects activities at JPL: Coping with COTS
Radiation effects and testing programs on commercial off-the-shelf (COTS) devices and circuits, which are important for NASA programs, are discussed. Demands for increased performance levels in spacecraft systems is stimulating the use of electronic and photonic devices. Some advances in electronics to reach high performance will result in the miniaturization of devices, which will lead to increased radiation vulnerability.
Barnes, C.↗
To the Die Smartly: Heavy Ion Testing of PEMs on COTS Boards Through the Plastic
Seven commercial off the shelf (COTS) boards containing electronic devices (all in plastic packages, PEMS), under consideration for use in a spacecraft subsystem, were exposed to beams of very high energy ions at the National Superconducting Cyclotron Laboratory (MSU). The ion energies were high enough that an entire board could be exposed in air, and it could still penetrate through the plastic and reach the silicon die. A total of about 300 runs were made, and for each, the LET of the ion entering the silicon die had to be determined, based on the thickness of the plastic lid and the thickness of overlaying materials (e.g., aluminum degraders). Single event latchup (SEL) and functional interrupt (SEFI) were determined during each run, the SEFI by means of simple programs being continuously written to and read from the boards to monitor functionality, while each part was being exposed to the heavy ions.
Wert, J. L.↗
COTS Ceramic Chip Capacitors: An Evaluation of the Parts and Assurance Methodologies
This viewgraph presentation profiles an experiment to evaluate the suitability of commercial off-the-shelf (COTS) ceramic chip capacitors for NASA spaceflight applications. The experiment included: 1) Voltage Conditioning ('Burn-In'); 2) Highly Accelerated Life Test (HALT); 3) Destructive Physical Analysis (DPA); 4) Ultimate Voltage Breakdown Strength. The presentation includes results for each of the capacitors used in the experiment.
Sampson, Michael J.↗
Analysis of Wallops Flight Test Data Through an Automated COTS System
During the summer of 2004 NASA Langley Research Center flight tested a Synthetic Vision System (SVS) at the Reno/Tahoe International Airport (RNO) and the Wallops Flight Facility (WAL). The SVS included a Runway Incursion Prevention System (RIPS) to improve pilot situational awareness while operating near and on the airport surface. The flight tests consisted of air and ground operations to evaluate and validate the performance of the system. This paper describes the flight test and emphasizes how positioning data was collected, post processed and analyzed through the use of a COTS-derived software system. The system that was developed to analyze the data was constructed within the MATLAB(TM) environment. The software was modified to read the data, perform several if-then scenarios and produce the relevant graphs, figures and tables.
Blackstock, Dexter Lee↗
Experimental evaluation of a COTS system for space applications
The use of COTS-based systems in space missions for scientific data processing is very attractive, as their ratio of performance to power consumption of commercial components can be an order of magnitude greater than that of radiation hardened components, and the price differential is even higher.
fault injection on-board processing cluster commut↗
A design-diversity based fault-tolerant COTS avionics bus network
This paper describes a COTS bus network architecture consisting of the IEEE 1394 and SpaceWire buses.
highly survivable avionics systems for long-term d↗
COTS-based OO-component approach for software inter-operability and reuse (software systems engineering methodology)
The purpose of this research and study paper is to provide a summary description and results of rapid development accomplishments at NASA/JPL in the area of advanced distributed computing technology using a Commercial-Off--The-Shelf (COTS)-based object oriented component approach to open inter-operable software development and software reuse.
object-oriented components distributed computing a↗
Using COTS tools in the development of a model based avionics architecture tool
Information and discussion of the development of an Avionics Architecture Tool that is model-based using commercial off the shelf (COTS) products will be provided.
model driven design↗
Implementing Falut Tolerance in the COTS-Based X2000 Architecture: A Case Study on IEEE 1394
Among other challenges from NASA's X2000 Technology Development Program, affordability and miniaturizaton are prominent criteria, which 1) preclude the traditional solutions for mission reliability that rely on customer-built hardware and extensive component/subsystem replication, and 2) call for commercial-of-the-shelf (COTS) based approaches incorporating novel, practical fault tolerance techniques.
IEEE 1394 bus interface commercial-off-th-shelf sp↗
Dosimetry and microdosimetry using COTS ICs: A comparative study
A new method using an array of MOS transistors formeasuring dose absorbed from ionizing radiation is compared to previous dosimetric methods., The accuracy and precision of dosimetry based on COTS SRAMs, DRAMs, and WPROMs are compared and contrasted. Applications of these devices in various space missions will be discussed. TID results are presented for this summary and microdosimetricresults will be added to the full paper. Finally, an analysis of the optimal condition for a digital dosimeter will be presented.
microdosimetry↗
Evaluation of Advanced COTS Passive Devices for Extreme Temperature Operation
Electronic sensors and circuits are often exposed to extreme temperatures in many of NASA deep space and planetary surface exploration missions. Electronics capable of operation in harsh environments would be beneficial as they simplify overall system design, relax thermal management constraints, and meet operational requirements. For example, cryogenic operation of electronic parts will improve reliability, increase energy density, and extend the operational lifetimes of space-based electronic systems. Similarly, electronic parts that are able to withstand and operate efficiently in high temperature environments will negate the need for thermal control elements and their associated structures, thereby reducing system size and weight, enhancing its reliability, improving its efficiency, and reducing cost. Passive devices play a critical role in the design of almost all electronic circuitry. To address the needs of systems for extreme temperature operation, some of the advanced and most recently introduced commercial-off-the-shelf (COTS) passive devices, which included resistors and capacitors, were examined for operation under a wide temperature regime. The types of resistors investigated included high temperature precision film, general purpose metal oxide, and wirewound.
Patterson, Richard↗