Dividing a system into almost unidirectional blocks
نویسنده
چکیده
When a system is divided into blocks B 1 B2..Bk..B m such that the existence of failure in B k will not interfare required performance of blocks B 1 B2... and Bk_l, then these blocks are called unidirectional blocks. To determine failure elements in a system, unidirectional blocks B 1 B2... will be tested one by one in the order to find a block containin~ failure first, then diagnose the block to locate failure elements. It is easily seen that this process is simpler than testing a system as a whole to determine the location of failure elements by one procedure. Unfortunatley , most of systems can not be divided into unidirectional blocks. Howeveg it is possible to divide a system into almost unidirectional blocks B 1 B2...Bk...B m such that the existence of failure in B k will interfare only slightly to the performance of preceding 51ocks B 1 B2...Bk_ I.
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