Title: Reliability evaluation of partitioned TMR systems
Abstract: Abstract The fault‐tolerant technique has been frequently employed to realize a highly reliable computer system. This paper considers the Triple‐Modular Redundancy (TMR) system, which is one of the fault‐tolerant systems whereby the system is partitioned into several blocks and the majority decision is made in each block. The reliability of such a system is evaluated. Based on the relation between the number of partitions and the failure rate of such a system, the following two types of models are assumed: (1) TMR network model, where the failure rate of the whole system increases with the number of partitions, when the failure rate of the block is kept constant. (2) LSI model, where the block failure rate decreases with the number of partitions, when the failure rate of the whole system is kept constant. Especially, in the model (2), the pin‐gate ratio of LSI is taken into consideration. For these models, the expression for the Mean‐Time‐To‐Failure (MTTF), which is the mean operation time until a system failure occurs, is derived. The general tendency of MTTF is analyzed. By numerical examples, the improvement of MTTF by partitioning is demonstrated. The improvement of the TMR system by partitioning is demonstrated quantitatively.
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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