CONTROL AND DIAGNOSTICS OF FAULTS IN A REDUNDANT DIGITAL COMPUTER CONSTRUCTED ON THE MAJORITY PRINCIPLE,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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Majority redundance to increase the reliability of a control computer is effected by breaking up the computer into S equally reliable blocks, at the level at which the redundance is introduced. The number of redundant blocks R may or may not be equal to the number of functional blocks M. An expression is given for the reliability of the redundant computer with allowance for the fact that in practice it is impossible to subdivide the computer into blocks of equivalent reliability. The monitoring of faults in such a redundant computer is based on the fact that in the case when all the functional and majority elements operate correctly, the outputs of the redundant networks should have identical states. Any disagreement between the outputs of the redundance blocks can be described by a certain function made up of two-threshold functions, each of which can be realized by a single two-threshold element. A block diagram for the monitoring of the computer, based on this principle, is presented.
- Computer Hardware
- Manufacturing and Industrial Engineering and Control of Production Systems