The design and analysis of AVTMR (all voting triple modular redundancy) and dual–duplex system

In this paper, we design AVTMR (All Voting Triple Modular Redundancy) and dual–duplex system which have a fault-tolerant characteristic, and two systems are compared in the evaluation of RAMS (Reliability, Availability, Maintainability and Safety) and MTTF (Mean Time To Failure). AVTMR system is designed in a triplicated voter technique and dual–duplex system in a comparator, and two systems are based on MC68000. To evaluate system characteristic, Markov modeling method is designed for reliability, availability, safety and MTTF (Mean Time To Failure), and RELEX6.0 tool is used for the calculation of failure rate of electrical components that is based on MILSPEC-217F. In this paper, we can see two systems are more high dependability than a single system, and AVTMR or dual–duplex system can be selected for a specific application system. Especially, because AVTMR and dual–duplex system have high RAMS better than a single system, they can be applied to life critical system such as an airplane and a high-speed railway system.