Cesar Pena posted on
December 17, 2009 11:21
There are certain control systems, such as in nuclear power plants and airplanes, that cannot be disabled or shut down, even momentarily, because of the threat to people’s lives. In these applications, a redundant control system must be in place to take over instantaneously if the primary system fails.
I recently deployed one such redundant control system for train tunnel ventilation at a major i...
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