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Determination of an Optimal Commercial Data Bus Architecture for a Flight Data SystemNASA/Marshall Space Flight Center (MSFC) is continually looking for methods to reduce cost and schedule while keeping the quality of work high. MSFC is NASA's lead center for space transportation and microgravity research. When supporting NASA's programs several decisions concerning the avionics system must be made. Usually many trade studies must be conducted to determine the best ways to meet the customer's requirements. When deciding the flight data system, one of the first trade studies normally conducted is the determination of the data bus architecture. The schedule, cost, reliability, and environments are some of the factors that are reviewed in the determination of the data bus architecture. Based on the studies, the data bus architecture could result in a proprietary data bus or a commercial data bus. The cost factor usually removes the proprietary data bus from consideration. The commercial data bus's range from Versa Module Eurocard (VME) to Compact PCI to STD 32 to PC 104. If cost, schedule and size are prime factors, VME is usually not considered. If the prime factors are cost, schedule, and size then Compact PCI, STD 32 and PC104 are the choices for the data bus architecture. MSFC's center director has funded a study from his discretionary fund to determine an optimal low cost commercial data bus architecture. The goal of the study is to functionally and environmentally test Compact PCI, STD 32 and PC 104 data bus architectures. This paper will summarize the results of the data bus architecture study.
Document ID
20010046967
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Crawford, Kevin
(NASA Marshall Space Flight Center Huntsville, AL United States)
Johnson, Martin
(NASA Marshall Space Flight Center Huntsville, AL United States)
Humphries, Rick
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Documentation And Information Science
Meeting Information
Meeting: International Telemetering Conference
Location: Las Vegas, NV
Country: United States
Start Date: October 22, 2001
End Date: October 25, 2001
Funding Number(s)
PROJECT: CDDF Proj. 2000-06
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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