NDLI: A distinct software implementation in a vehicle controller

Content Provider	IEEE Xplore Digital Library
Author	Greve, W.E. Schroder, R.J.
Copyright Year	1983
Description	Author affiliation: Boeing Aerospace Company, Seattle, WA (Greve, W.E.)
Abstract	The reliability and safety of a system can be improved by distinct software, which is a method of executing a common software design by two distinct algorithms and comparing the results. The methods of implementing distinct software are still being devised and are based on little experience. This paper discusses an implementation of distinct software in the vehicle control unit of an automated vehicle. Each module in the vehicle control unit which is considered to be safety critical is performed by two sets of distinct algorithms in pseudoparallel (one after the other) in the same micro-processor. There are two identical microprocessors with identical software to detect a single processor failure. Within each processor the distinct algorithms are compared. The output of the distinct algorithms detect common mode software errors and common mode hardware failures in the two processors, thus, improving the safety of the vehicle control unit. This paper describes the safety related software concepts being used in the design for the Advanced Group Rapid Transit (AGRT) on-board computers with extended discussion of intra-channel distinct software.
Starting Page	148
Ending Page	152
File Size	447776
Page Count	5
File Format	PDF
DOI	10.1109/VTC.1983.1623127
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-05-25
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Software safety Vehicle safety Software algorithms Automatic control Software design Microprocessors Vehicle detection Computer errors Error correction Hardware
Content Type	Text
Resource Type	Article

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