Abstract :
The processes of protective redundancy, namely, standby replacement (SR) redundancy and hybrid redundancy (a combination of SR and multiple-line voting redundancy), find application in the architecture of fault-tolerant digital computers and enable them to be ultrareliable and self-repairing. The claims to ultrareliability lead to the challenge of quantitatively evaluating and assigning a value to the probability of survival as a function of the mission durations intended. This note presents various mathematical models, and derives and displays quantitative evaluations of system reliability as a function of various mission parameters of interest to the system designer.
Keywords :
Fault-tolerant digital systems, hybrid redundancy, hybrid/ simplex redundancy, measures of reliability, protective redundancy, reliability modeling, self-repair, ultrareliability.; Application software; Computer architecture; Digital systems; Fault tolerance; Fault tolerant systems; Mathematical model; Protection; Redundancy; Strontium; Voting; Fault-tolerant digital systems, hybrid redundancy, hybrid/ simplex redundancy, measures of reliability, protective redundancy, reliability modeling, self-repair, ultrareliability.;
