Naslov
Experimental Evaluation of Dependability of Standby Fault-Tolerant Microcomputer System by Fault Injection

Autori
Hocenski, Željko ; Veizer, Berislav

Izvornik
Automatika : časopis za automatiku, mjerenje, elektroniku, računarstvo i komunikacije (0005-1144) 37 (1996), 3-4; 117-120

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cold standby; fault coverage; fault injection; fault tolerance; microcomputer

Sažetak
The fault-tolerant system based on cold spare standby is made by microprocessor modular systems. The dependability of this system is evaluated by using the fault injection into the bus lines. The fault injector equipment consists of one personal computer and additional extended hardware. The used fault injection method performs the flexible location for injection, variable impulse duration and the choice of the injected signal logical level. The results of testing are given as the number of detected faults of the active unit and the number of failures of the whole system as a function of fault duration. The fault detection coverage and fault recovery coverage are evaluated for nonredundant and redundant software by using the probability of fault occurrence based on observed bus activity and the registered number of faults. The recovery coverage for the system with redundant software is much better than for the system with nonredundant software, but many of faults are masked, so that fault detection coverage is not well known for the system with redundant software.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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