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    • 66. 发明授权
    • Fault tolerable redundancy control
    • 容错冗余控制
    • US4583224A
    • 1986-04-15
    • US549435
    • 1983-11-07
    • Kazuhiko IshiiAtomi NoguchiYoshimi Gotoh
    • Kazuhiko IshiiAtomi NoguchiYoshimi Gotoh
    • G05B9/03G06F11/18H04L1/22G06F11/00
    • G06F11/184G05B9/03H04L1/22G06F11/185
    • A redundant control system in which three output signals from three equivalent signal processors are compared with each other to judge whether each of the output signals is normal or abnormal, an abnormal output signal thus determined is replaced by a set signal having a predetermined level, and then a majority operation is performed for normal output signals and the set signal to obtain a control signal. The control signal is formed of the logical product or logical sum of two normal output signals according as the predetermined level of the set signal is "1" or "0". In the case where a circuit for generating the above-mentioned control signal are formed in triplicate and a majority operation is performed for three control signals, a fault occurring at other circuit portions than a majority logic circuit at the final stage is permissible. Further, the reliability of the control system is enhanced by forming abnormality detecting means in triplicate and performing a majority operation for the outputs of three abnormality detecting means.
    • 将来自三个等效信号处理器的三个输出信号相互比较以判断每个输出信号是正常还是异常的冗余控制系统,由此确定的异常输出信号被具有预定电平的置位信号代替, 则对于正常输出信号和设定信号执行多数操作以获得控制信号。 根据设定信号的预定电平为“1”或“0”,控制信号由两个正常输出信号的逻辑积或逻辑和构成。 在用于产生上述控制信号的电路一式三份地形成并且对于三个控制信号执行多数操作的情况下,允许在最终级的多数逻辑电路的其它电路部分发生的故障。 此外,通过一式三份地形成异常检测装置并且对三个异常检测装置的输出执行多数操作来增强控制系统的可靠性。