A Simulator for the Evaluation of Digital System Reliability
Department of Electrical Engineering, Stanford University, 1977 - Digital computer simulation - 79 pages
This report describes a simulation package designed to evaluate the reliability of digital systems. The simulator can be used to model many different types of systems, at varying levels of detail. The user is given much freedom to use the elements of the model in the way best suited to simulating the operation of a system in the presence of faults. The simulation package then generates random faults in the model, and uses a Monte Carlo analysis to obtain curves of reliability. Three examples are given of simulations of digital systems which have redundancy. The difference between this type of simulation and other simulation techniques is discussed.
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THE SIMULATION PROCESS
COMPARISON WITH OTHER SIMULATORS
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0.0 DURATION DIST 1n this computer Alan Thompson analytic arbiter fault arrival exponential behavior called compensating failures complete component computer memory data output data-store subroutine DELAY DISTRIBUTION detected in computer digital circuit DIST 0 MULTIPLICITY Dual Computer System dual system DURATN PARAMS example exponentially distributed failed fault is active fault is detected fault-detection FORTRAN hardware incorrect data INITIAL STATE OCCURANC input links integrated circuit large number link value modules monitor Monte Carlo analysis NAND gates next-event list OCCRNC PARAMS OCCURANC DIST output links output of computer output port parameters Pascal probability distribution random seed redundant Reliability Curves repair rate repairs/time unit simulation package simulation process simulation program simulation results simulation run single fault specific STATE-VARIABLE STVAR ten-hour missions TM DLY PARAMS TMR NAND-Gate System transient fault Triple Modular Redundant type of simulator type subroutines undetectable fault Unreliability Curve utility package utility program Weibull distributed