scholarly journals Reliability analysis of a complex system with hybrid structures and multi-level dependent life metrics

2021 ◽  
Vol 209 ◽  
pp. 107469
Author(s):  
Lechang Yang ◽  
Pidong Wang ◽  
Qiang Wang ◽  
Sifeng Bi ◽  
Rui Peng ◽  
...  
Keyword(s):  
Complex System ◽  
Reliability Analysis ◽  
Hybrid Structures ◽  
Multi Level

Multi-level approach for important component identification and reliability evaluation for complex system by survival signature

2019 ◽  
Vol 37 (1) ◽  
pp. 262-288
Author(s):  
Liling Ge ◽  
Yingjie Zhang
Keyword(s):  
Complex System ◽  
Complex Systems ◽  
Reliability Analysis ◽  
Production System ◽  
Content Type ◽  
Actual Production ◽  
Machining System ◽  
Multi Level ◽  
Critical Components

Purpose The purpose of this paper is to identify the critical components of a complex system by using survival signature. First, a complex system is abstracted with varying scales and generates a multi-levels model. Then reliability evaluations can be conducted by survival signature from rough to fine for tracing and identifying them. Finally, the feasibility of the proposed approach is demonstrated by an actual production system. Design/methodology/approach The paper mainly applies a multi-level evaluating strategy for the reliability analysis of complex systems with components of multiple types. In addition, a multi-levels model of a complex system is constructed and survival signature also used for evaluation. Findings The proposed approach was demonstrated to be the feasibility by an actual production system that is used in the case study. Research limitations/implications The case study was performed on a system with simple network structure, but the proposed approach could be applied to systems with complex ones. However, the approach to generate the digraphs of abstraction levels for complex system has to be developed. Practical implications So far the approach has been used for the reliability analysis of a machining system. The approach that is proposed for the identification of critical components also can be applied to make maintenance decision. Originality/value The multi-level evaluating strategy that was proposed for reliability analysis and the identification of critical components of complex systems was a novel method, and it also can be applied as index to make maintenance planning.

scholarly journals SOFT COMPUTING IN MANAGEMENT: MANAGEMENT OF COMPLEX MULTIVARIATE SYSTEMS BASED ON FUZZY ANALOG CONTROLLERS

2017 ◽  
pp. 42-51 ◽  
Author(s):  
S. O. Kramarov ◽  
L. V. Sakharova ◽  
V. V. Khramov
Keyword(s):  
Complex System ◽  
Soft Computing ◽  
The State ◽  
Fuzzy Classifiers ◽  
Multi Level ◽  
Multivariate Systems

The proposed method of management of complex system based on soft computing, which includes newly developed mathematical tools of fuzzy analog controllers. Model of analog controllers based on the previously proposed apparatus of the multi-level fuzzy classifiers to assess the state of the system based on the integration of complex heterogeneous indicators.

Study on Pre-Warning Mechanism of Water Resources Security

2013 ◽  
Vol 726-731 ◽  
pp. 3715-3722
Author(s):  
Li Liu ◽  
Ming Qi Chang ◽  
Yue Wang ◽  
Lei Xu
Keyword(s):  
Complex System ◽  
Water Resources ◽  
Warning System ◽  
Operating Mechanism ◽  
Systematic Method ◽  
Key Technology ◽  
Decision Method ◽  
Multi Level ◽  
Degree Classification

Pre-warning system of water resources security is a multi-level and complex system made of many factors. By analyzing current situation of water resources security pre-warning, operating mechanism of water resources security pre-warning system is put forward, Logic, time and knowledge related to operating mechanism are discussed. For pre-warning threshold decision is one of key technology in water resources security pre-warning, warning threshold decision and warning degree classification of water resources security pre-warning are set forth. These methods are systematic method, control chart method, synthetic judgement method, catastrophism method and expert decision method. Adopting the water resources security pre-warning system, situation can be analyzed and predicted promptly and effectively.

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