Ensuring fault-tolerant computations in distributed control systems

Abstract

This paper demonstrates that the fault tolerance of distributed control systems (DCSs) can be improved by scheduling of processes representing functional segments with guaranteed operation of the mechanisms of process reexecution and parallel execution based on checkpoints. Moreover, we suggest the methodological approach to assessing the fault tolerance level of DCSs, which proceeds from the probabilistic modeling of systems having the time triggered architecture (TTA). Finally, we derive numerical formulas for qualitative and quantitative estimation of the fault tolerance level for different modifications of DCSs at the design stage.