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TL32 Datasheet(PDF) 19 Page - List of Unclassifed Manufacturers

Part # TL32
Description  Real Time System Testing MIT 16.070 Lecture 32
PDF  31 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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TL32 Datasheet(HTML) 19 Page - List of Unclassifed Manufacturers

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hperry
5/4/01
Fault Tolerance - Redundant Processors
Who needs 4 computers and a backup? The Space Shuttle
•
On ascent and landing/entry the Space Shuttle uses 4 identical
computers and one backup. Why? A 1/2 second glitch in the
guidance, navigation & control software will cause the shuttle to spin
out of control.
•
During rendez-vous and docking, 2 computers are used
•
On orbit, only one computer is necessary
•
In all cases, the backup computer is always available and runs a
different set of software than the other 4, a technique known as N-
version programming.



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