RELIABILITY AND SAFETY RESEARCH OF HOT STANDBY MICROCOMPUTER SIGNALLING SYSTEMS
Christo Georgiev Christov, Nelly Stoytcheva · Periodica Polytechnica Transportation Engineering · 2000
In this paper it has been studied the safety of a widespread class of microcomputer systems for real time control, systems with active redundancy (hot standby), composed of two identical units with three modes of each unit - active, safely failed and dangerously failed states. Markov modelling has been used. Safety is estimated by the dangerous failure function and MTBDF. The aim of the study is to prove that the system´s reliability is significantly greater than that of the separate unit while safety does not change sufficiently, which makes the system applicable as a signalling one.