| 摘要 |
<P>PROBLEM TO BE SOLVED: To ensure safety against n-failures of any parts including a majority circuit when n is a natural number. <P>SOLUTION: The number of control devices which control a control object, is (2n+1). The number of failure switches 2, actuators 4, and power sources 5 is respectively at least (n+1). The failure switches 2 are arranged in a matrix having a parallel number of<SB POS="POST">2n</SB>C<SB POS="POST">n</SB>in each failure switch 2 and a serial number of n. The switches in each series is controlled by the combinations of n-control devices among the 2n-control devices except for the control devices 1 directly controlling the failure switches 2, and the number of the combinations of the control devices 1 in the column<SB POS="POST">2n</SB>C<SB POS="POST">n</SB>is<SB POS="POST">2n</SB>C<SB POS="POST">n</SB>. Even in the case in which the switches of the failure switches 2 are controlled based on the control signals from the control device 1 without failure to find n-failures, the power supply of the actuator with failure can be reliably turned off, and the power supply of the normal actuator can be reliably turned on, thereby avoiding risks. <P>COPYRIGHT: (C)2012,JPO&INPIT |
