Patent ID: 6850807

Claim:
A triple redundant control device, comprising: first to third control units, each of which outputs a corresponding one of first to third control signals, and outputs a corresponding one of first to third control stop signals when the corresponding one of the first to third control units stops; first to third higher value selector switches, each configured to receive the corresponding one of the first to third control signals and the corresponding one of the first to third control stop signals, which outputs the corresponding one of the first to third control signals, and changes output into a signal associated to a value higher than values of the first to third control signals when the corresponding one of first to third control stop signals is inputted; a medium value gate configured to receive signals outputted from the first to third higher value selector switches, which selects and outputs a medium value of values corresponding to the first to third control signals; and a signal selector configured to receive the first to third control stop signals and a signal outputted from the medium value gate, which outputs the signal outputted from the medium value gate, and changes output, when two of the first to third control stop signals are inputted, into one control signal corresponding to one control stop signal not being inputted.