Reliability, Safety and Time-Domain Sensitivity Analysis of Double 2-out-of-2 Redundancy System Based on Markov Process and Multiple Beta Factor Model

Wang, Liquan; Wang, Xiangyu; Jia, Peng; Lizhang, Hanyi; Wang, Gang

doi:10.1109/icsrs.2018.8688833

Cited by 1 publication

(1 citation statement)

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“…Current research on redundancy system safety mainly focuses on safety assessments and common-cause failure analysis. In safety assessment, the Markov method is widely used due to its ability to calculate probabilities for systems with repair capabilities and multiple degradation states [6]. Common-cause failure is an influential factor in the safety analysis of redundant systems.…”

Section: Introductionmentioning

confidence: 99%

Safety assessment of redundant LCU systems based on Markov model

Yang,

Zhu,

Zhan

et al. 2024

Third International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2024)

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In addressing the issue of multiple common-cause failures in safety assessments of Logic Control Units (LCU), research is conducted on the redundant structure and safety assessment methods of LCU. The double 2-out-of-2 redundancy structure is employed in the hardware redundancy design of LCU to enhance safety. The Markov method is used to assess the safety of LCU, where system states are divided based on hardware structure and redundancy strategies. To address the inadequacy of β factor models in common-cause failure that do not consider multiple common-cause failures, structural factors are employed for optimization. Independent failure and common-cause failure Markov state transition model are established respectively, and consequently, the safety assessment model of LCU considering multiple common-cause failures has been established. Simulation results indicate that considering multiple common-cause failures leads to more conservative safety assessment outcomes for LCU; both the fault coverage and common-cause failures of undetectable faults impact the safety of LCU. The research provides theoretical reference for the development and safety assessment of high-security performance LCU.

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Section: Introductionmentioning

confidence: 99%