| 摘要 |
PURPOSE:To minimize a switching deciding section, by comparing information among each system through the use of transmission in a digital controller, digitally outputting information of a system in failure and deciding the information with a 2-out-of-3 logic for switching. CONSTITUTION:Digital controllers A, B, C systems 1-3 are tied with transmission lines 12, 13, 14 so as to perform the transmission of information among each system. As signals to be transmitted, analog signals being final outputs are most desirable, and important signals are mutually transmitted and the values are compared at each system. Logic of 2-out-of-3 is used for conventional comparison, and processing can be simpler in comparison with analog controllers, because of digital constitution. The result of comparison is outputted as digital outputs from each system and a switching deciding section 4' makes switching to any of the systems A, B and C. |
