On the Availability and Downtime of Safety-Critical Networked Control Systems

The scope of this paper is safety-critical Networked Control Systems (NCSs). These systems use fault-tolerant architectures. Furthermore, this paper studies situations where repair times may be relatively long compared to the components’ mean time to failure. Using Markov models and for a pre-determined level of redundancy, it is shown how to determine the most appropriate fault-tolerant architect...