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Goal. To create a mathematical tool for assessing the quality of a complex system likely availability (or failure) in the presence of interrelation in the components operation. The tool is different from the Markov's chain and other analogs. Tasks. To introduce a binomial distribution as the sum of the probabilities of ordered subsets of the numbers of successful tests. Introduction to probability...
Fault Tree Analysis (FTA) is widely applied to evaluating failure probability related to complex engineering system. A large number of minimal cut sets (MCSs) may be involved in FTA when dealing with complex system, and searching for these MCSs may be time-consuming. Modules of fault trees have been employed to reduce the computational burden relevant to basic operations of fault trees. Based on the...
This paper proposes a new maintenance modeling for evaluating Mean Time To Repair (MTTR) of complex systems based on Goal Orient (GO) method. First, the GO operation formulas of MTTR for the frequently-used GO operators are proposed. Then, the system MTTR evaluation process of this paper' method is formulated. Finally, this paper's method is used to evaluate the MTTR of a hydraulic oil supply system...
Failure analysis is an important part in reliability analysis, while the traditional FMEA method could not analyze system with complex physical structure and functional logic by tables. Based on the Altarica language, this paper presents a method of product fault modeling and analysis for complex system. Then give examples of cold/warm backup system and reconfiguration system to verify the accuracy...
It is of great help and practical guidance for a system to improve the reliability and extend the service life when getting the knowledge of the components importance in a system. By introducing the description of virtual gravity, the function addressing the influence between components is built to evaluate the importance of each component, in which proximity and relationship contribution to nodes...
This paper introduces a framework for studying resilience of networked systems in the presence of strong network externalities. The framework used in this paper explicitly incorporates costs of connection and the benefits that are received by direct and indirect access to resources. We show that this simple framework is capable of capturing the three key parameters of resilience: Magnitude of Performance...
With the development of intelligent technologies, self-driving vehicles are considered as a promising solution against accident, traffic congestion and pollution problems. Intelligent vehicle techniques have been the research focus all over the world. However, full self-driving vehicles are still far away from its realization and extensive application due to safety requirements and cost considerations...
The fuzzy T — norms and T — conorms offer alternatives to compute the classical structural polynomial of a complex circuit. The reliability of a special complex 4-node circuit were evaluated, and it is show that, among a certain family of classic T — norms, the Frank T-norm provides a T — map emerging from the structural polynomial, which proves to be the best estimate for this reliability. Illustrative...
Radio-electronic means for various purposes are classified as complex systems and are characterized by a multilevel hierarchical structure in the form of separate units, blocks, and modules. As the system is influenced by a complex of factors in the process of operation, reliability of complex systems functioning depends on the reliability of the system elements and optimal distribution of reliability...
In this paper, we provided a selective maintenance model for complex system with multilevel structure. Our selective maintenance model is so special that we consider the fact when a specific component is maintained so that the subsystems must be removed. We consider that the components have two kind of status, working or failed. We consider three different maintenance actions for the components with...
Present paper computes the interval-valued reliability of an engineering system in the context of the value of state performance. In this study, we have evaluated the interval-valued reliability of a 2-out-of-4 system with the help of reliability function. The considered model of 2-out-of-4 system consists of 2 numbers of components connected in series. The interval universal generating function technique...
On the basis of a brief introduction about the recent progress of reliability assessment of complex systems, combined methods and state methods are introduced. In view of the shortcomings and deficiencies of these two kinds of methods, a reliability assessment method is put forward which based on fault tree analysis (FTA) and Bayesian network (BN). By applying the results of FTA of a complex system...
This paper presents an application of the Bayesian networks (BN) to substation reliability analysis. First part of the paper describes BN used to construct simple nodes, second shows the methodology used in constructing models of complex systems. A new model to represent dependent outages is introduced in the paper with a discussion how to avoid cycles when creating network models. A combination of...
Supply chains are critical to delivering components and products safely, affordably, and securely. However, these complex networks of suppliers, manufacturers, and customers are vulnerable to internal and external disruptions and subject to exploitation. This can result in adverse impacts to the system and inhibit value delivery. This paper presents a new generic electronics supply chain model that...
Current Probabilistic Risk Assessment (PRA) methods analyze operator actions in accident scenarios using Human Reliability Analysis (HRA) methods after Emergency Operating Procedures (EOPs) and complex system design are largely complete. This paper proposes the early Model-based HRA (eMHRA) method that couples PRA, HRA, and EOP development together and shifts analysis earlier into the complex system...
Many critical infrastructures such as the power transmission grid are heterogeneous both in their basic structure and in some of their underlying characteristics, This heterogeneity can be good for system robustness if it reduces the spread of failures or bad if it adds risk or vulnerability to the system. In this paper we investigate the effect of heterogeneity in the strength of the links between...
Systems experiencing multiple dependent competing failure processes (MDCFP) have attracted much attention in the recent years. A system subject to MDCFP with damage self-recovery phenomenon is considered in this paper. Due to the intrinsic resistance to abrupt damage, the damage self-recovery exists in many systems and products. A new reliability model subject to MDCFP by considering the damage self-recovery...
Many models and methodologies in order to predict the remaining useful life (RUL) of a critical component are investigated nowadays. However, estimating remaining useful life of multi-component systems is still an under explored area, especially when there are interdependencies among the components of these systems. Practically, prognostics can be quite complicated when there is absence of prior knowledge...
In this paper, the integrated evaluation method and the realization integrated are studied for the civil aircraft integrated avionics network based on multi performance indices. To address the reliability of the civil aircraft integrated avionics network, the evaluation indices are established which contains invulnerability, survivability, effectiveness and synchronization. Then, the evaluation system...
The objective of this article is to introduce researchers to the software engineering challenges of an industry that is important to many of the economies of East Asia -- shipbuilding. Research in software technologies critical to this industry has lagged that of software research in other domains.
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