This paper discusses the impact of Very Large Scale Integrated Circuits (VLSI) on the Reliability, Availability, Maintainability, and Supportability (RAMS) characteristics of avionics system to be deployed in the 1990 time frame. A reliability sensitivity analysis of a 4.5 million gate system is presented with data from more than 25 major system redundancy configurations analyzed. The impact of these various redundancy architectures on chip, module, equipment and system RAMS characteristics is detailed. Using this medium-sized digital equipment analysis as a model, the we proceed to uncover the implications of dramatically increased use of custom VLSI in avionics (and other) systems. The purpose is to provide RAMS practitioners with some insight into the design and use implications of the 'Super-chips' that will soon become commonplace. Some of the conclusions are: non-monolithic interconnections essentially determine system reliability, increased chip complexity provides high leverage RAMS opportunities, RAMS personnel must cause communication to happen between systems definition and VLSI implementation personnel if the full potential of VLSI is to be realized, and there are tough design challenges in thermal, electrostatic discharge radiation protection and circuit/system architecture which must be met in the design, production, and support of systems using theses devices.
VLSI impact on RAMS strategies in avionics design
Einfluss von VLSI-Schaltungen auf die Zuverlaessigkeit, Verfuegbarkeit und Wartung beim Entwurf von Avioniksystemen
1986
4 Seiten, 1 Bild, 3 Tabellen, 2 Quellen
Conference paper
English
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