Triple redundant control device and method

Details Triple redundant control device and method Triple redundant control device and method

2005-02-01

2005-02-01

Knight, Anthony (Department: 2121)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Having protection or reliability feature

C700S003000, C700S019000, C700S020000, C700S021000, C700S022000, C714S011000

Reexamination Certificate

active

06850807

ABSTRACT:
A triple redundant control device, including, first to third control units, each outputting corresponding one of first to third control signals, and outputting corresponding one of first to third control stop signals when corresponding one of the first to third control units stops, first to third higher value selector switches, each receiving corresponding one of the first to third control signals and corresponding one of the first to third control stop signals, outputting corresponding one of the first to third control signals, and changing output into a signal associated to a value being higher than values of the first to third control signals when the corresponding one of first to third operation stop signal is inputted, a medium value gate receiving signals outputted from the first to third higher value selector switches, selecting and outputting a medium value of values corresponding to the first to third control signals, and a signal selector receiving the first to third control signals and a signal outputted from the medium value gate, outputting the signal outputted from the medium value gate, and changing output, when two of the first to third control signals are inputted, into one control signal corresponding to one operation signal not being inputted.

REFERENCES:
patent: 4593249 (1986-06-01), Arita et al.
patent: 4626707 (1986-12-01), Arita et al.
patent: 6061809 (2000-05-01), Glaser et al.
patent: 6711513 (2004-03-01), Brown et al.
patent: 4-287201 (1992-10-01), None
patent: 6-75603 (1994-03-01), None

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