A Novel Fault Diagnosis Method for High-Temperature Superconducting Field Coil of Superconducting Rotating Machine

Song, Seunghyun; Ko, Tae Kuk; Choi, Yojong; Lee, Sang Gap

doi:10.3390/app10010223

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…Similarly, the function-resource element mapping correlation matrix can be expressed shown as Matrix (2).…”

Section: Formal Description Of Hierarchical Modelmentioning

confidence: 99%

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A Novel Risk Assessment and Analysis Method for Correlation in a Complex System Based on Multi-Dimensional Theory

Jiang¹,

Zhao²,

Wang³

et al. 2020

Applied Sciences

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With the rapid development of high integrations in large complex systems, such as aircraft, satellite, and railway systems, due to the increasingly complex coupling relationship between components within the system, local disturbances or faults may cause global effects on the system by fault propagation. Therefore, there are new challenges in safety analysis and risk assessment for complex systems. Aiming at analyzing and evaluating the inherent risks of the complex system with coupling correlation characteristics objectively, this paper proposes a novel risk assessment and analysis method for correlation in complex system based on multi-dimensional theory. Firstly, the formal description and coupling degree analysis method of the hierarchical structure of complex systems is established. Moreover, considering the three safety risk factors of fault propagation probability, potential severity, and fault propagation time, a multi-dimensional safety risk theory is proposed, in order to evaluate the risk of each element within the system effecting on the overall system. Furthermore, critical safety elements are identified based on Pareto rules, As Low As Reasonably Practicable (ALARP) principles, and safety risk entropy to support the preventive measures. Finally, an application of an avionics system is provided to demonstrate the effectiveness of the proposed method.

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“…Similarly, the function-resource element mapping correlation matrix can be expressed shown as Matrix (2).…”

Section: Formal Description Of Hierarchical Modelmentioning

confidence: 99%

“…In recent years, due to the complex correlation of components in complex systems, local faults may have a great effect on the overall system by fault propagation [1][2][3]. Therefore, the safety and risk analysis of such complex systems has attracted more and more attention.…”

Section: Introductionmentioning

confidence: 99%

A Novel Risk Assessment and Analysis Method for Correlation in a Complex System Based on Multi-Dimensional Theory

Jiang¹,

Zhao²,

Wang³

et al. 2020

Applied Sciences

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“…Rotating machinery can be widely used in various industrial applications, such as energy, electric power, transportation, petrochemical industry, and astronautics, and plays an irreplaceable important role. [1][2][3][4][5][6] Due to the weak installation quality and long-term vibration, looseness of rotating machinery components is common, which will affect the dynamic characteristics of system and even results in structure failure. The research of looseness fault has attracted the attention of many researchers at the moment and many achievements has been achieved.…”

Section: Introductionmentioning

confidence: 99%

Vibration characteristics of rotor system with disk-shaft clearance-eccentric coupling faults

Qiao

et al. 2023

Noise & Vibration Worldwide

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Clearance between the disk and shaft can lead to the aggravation of the system fault. To solve this problem, a disk-shaft dynamic model with the clearance-eccentric coupling faults is established by the finite element method. Based upon the model, the dynamic characteristics of the system with different influence factors such as clearance and rotating speed are acquired by comprehensive analysis. Meanwhile, the accuracy of the dynamic model is verified by experiment investigations. The results show that frequency components in the spectrum include the shaft’s rotating frequency and high frequency multiplication components. And the sawtooth phenomenon from the trajectory diagram of disk center can be observed. With the increase of rotating speed, the disk-shaft contact stress and strain energy first decrease and then increase, while the speed difference of disk to shaft and vibration amplitude increase, and the number of high frequency multiplication components in the spectrum decreases gradually. Furthermore, with the increase of clearance, the stable values of the disk-shaft contact stress and strain energy decrease, while the vibration amplitude, the number of high frequency multiplication components and speed difference increase gradually, and the trajectory shape of disk center changes from closed circle to hollow ring.

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“…This increases the time and cost. The flexible mapping between logical architecture and physics architecture brings new types of risk such as fault propagation (Jiang et al , 2020; Zhu et al , 2019; Song et al , 2019; Xiao et al , 2019). All the characters of IMA system will lead to a rapid increase in system complexity and unintended interaction amongst components.…”

Section: Introductionmentioning

confidence: 99%

A combination method for integrated modular avionics safety analysis

Yang

Sun

2022

AEAT

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Purpose This study aims to solve the problem that the traditional hierarchically performed hazard origin and propagation studies (HiP-HOPS) cannot make dynamic model for the complex system such as integrated modular avionics (IMA) system. Design/methodology/approach A new combination method that combines HiP-HOPS with architecture analysis and design language (AADL) is proposed. Findings The combination method potentially reduces the amount of rework required for safety analysis and modelling of a modified design. Research limitations/implications Modelling the IMA system with the combination method can just make qualitative analysis but cannot make quantitative analysis. Practical implications The static model depicts the fault propagation among the components while the dynamic model describes the composite fault with AADL for IMA system. Originality/value The results of the case study show that the proposed method not only keeps model consistency but also makes safety analysis and modelling for IMA system efficiently.

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A Novel Fault Diagnosis Method for High-Temperature Superconducting Field Coil of Superconducting Rotating Machine

Cited by 6 publications

References 22 publications

A Novel Risk Assessment and Analysis Method for Correlation in a Complex System Based on Multi-Dimensional Theory

A Novel Risk Assessment and Analysis Method for Correlation in a Complex System Based on Multi-Dimensional Theory

Vibration characteristics of rotor system with disk-shaft clearance-eccentric coupling faults

A combination method for integrated modular avionics safety analysis

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