Fault tree analysis of a hydraulic system based on the interval model using latin hypercube sampling

Zhang, Feng; Liu, Cheng; Gao, Yang; Xu, Xiayu; Wang, Yameng

doi:10.3233/jifs-190891

Cited by 8 publications

(4 citation statements)

References 27 publications

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“…Heavy-duty CNC machine tools (HCMTs) are responsible for the manufacturing of parts related to major pillar industries and national key projects [1][2][3] in fields of aerospace, marine, hydraulic engineering, metallurgy, energy, rail transit, etc. Among subsystems of HCMT, the hydraulic system plays a key role in the power transmission and control of HCMT [4], the failure frequency of which also accounts for the largest proportion [5]. The parts scrap or production accidents caused by hydraulic failure from seals [6], pipes, valves, and so on will lead to enormous waste, because HCMTs are mainly used to process large-scale and expensive parts [7].…”

Section: Introductionmentioning

confidence: 99%

Failure Analysis for Hydraulic System of Heavy-Duty Machine Tool with Incomplete Failure Data

Yang

Tian

et al. 2021

Applied Sciences

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A hydraulic system is a key subsystem of heavy-duty machine tools with a high failure intensity, the failure of which often causes shutdown of production and economic loss in machining. Therefore, it is necessary to implement failure analysis to identify the weak links of system and improve the reliability. For hydraulic system, there is often an amount of failure data collected in field, which help to calculate the occurrence probability of basic events through fault tree analysis method. However, the data are incomplete and uncertain. To address this issue, this study presents a fault tree analysis methodology. Experts’ opinions are utilized, combined with field data based on the Dempster–Shafer theory and rough set theory to fill the incompleteness and eliminate the uncertainty. For application in a case study, a fault tree of the hydraulic system of heavy-duty machine tools is firstly constructed. Then, the importance analysis is performed to help identify the weak links of hydraulic system. The results show the critical basic events affecting the safety and reliability of a hydraulic system.

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Section: Introductionmentioning

confidence: 99%

Failure Analysis for Hydraulic System of Heavy-Duty Machine Tool with Incomplete Failure Data

Yang

Tian

et al. 2021

Applied Sciences

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“…Test Design. e Latin hypercube method [28,29] was used to obtain the test points in the experiment. e points selected using this method can evenly cover the entire design space.…”

Section: Determination Of Constraintsmentioning

confidence: 99%

Optimal Design of the Sealing Structure of a Hydraulic Cylinder on the Basis of a Surrogate Model

Zhang

Sun

et al. 2020

Advances in Materials Science and Engineering

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In this study, a finite-element simulation model was established for a two-dimensional hydraulic cylinder seal structure with highly nonlinear materials and contacts for achieving the optimal sealing effect with the structure. The effects of gaps as well as single and double O-rings on the sealing effect were examined. On the basis of this examination, a parametric model was developed for double-O-rings without gaps, which are suitable for hydraulic cylinder sealing. Suitable design variables, objective functions, and constraint conditions were determined for the parametric model. Then, a surrogate model was fitted and optimised through a constrained Latin hypercube method, an interpolating recmultiquadric radial basis function method, and the genetic algorithm. The results indicate that the seal and seal groove structures obtained through optimisation with the surrogate model provide a superior sealing effect to unoptimised structures. Therefore, the combination of the developed surrogate model and finite-element method can provide a theoretical reference for the design of the sealing structure of hydraulic cylinders.

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“…3) The coupling relation of system structure and function makes the system and its components have multimode failure and failure correlation. Several traditional methods 8280 D. Chen et al / Multi-dimensional T-S dynamic fault tree analysis method involving failure correlation have been researched and proven to be powerful tools for analyzing and evaluating system reliability, including Reliability Block Diagram (RBD) [10], Fault Tree Analysis (FTA) [13,29], Binary Decision Diagram (BDD) [5,18], Markov chains [1,24], Bayesian Network (BN) [2], etc. These traditional methods have certain advantages in terms of modeling, execution, and computational efficiency, but also have significant limitations: 1) The RBD is usually based on the static model of the system and cannot consider the effect of dynamic factors on system reliability.…”

Section: Introductionmentioning

confidence: 99%

Multi-dimensional T-S dynamic fault tree analysis method involving failure correlation

Chen,

Liu,

Yao

et al. 2023

IFS

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The lack of effective failure correlation analysis is one main reason for the gap between the reliability models and the actual complex systems with mixed static and dynamic characteristics. Takagi and Sugeno (T-S) dynamic fault tree is one powerful tool to analyze the static and dynamic failure logic relationship but it assumes the failure probability of the event is independent. Therefore, this paper proposes a multi-dimensional T-S dynamic fault tree analysis method involving failure correlation. The method integrates the failure probability distribution function of basic events with multi-factors and the multi-dimensional copula function, and the important measure of this method is also deduced. The reliability model expression for systems with failure correlations, both in series and in parallel, is discussed and verified. Compare the proposed method with the assumption that the probability of a failure event is independent. This method solves the problem of a large error when ignoring the failure correlation between parts and the degree of the correlation between variables can be characterized. The reliability analysis can be conducted on complex systems affected both by multi-factors and failure correlations. The proposed method is applied to the reliability analysis of a hydraulic height adjustment system and the correctness and superiority of the method are verified.

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Fault tree analysis of a hydraulic system based on the interval model using latin hypercube sampling

Cited by 8 publications

References 27 publications

Failure Analysis for Hydraulic System of Heavy-Duty Machine Tool with Incomplete Failure Data

Failure Analysis for Hydraulic System of Heavy-Duty Machine Tool with Incomplete Failure Data

Optimal Design of the Sealing Structure of a Hydraulic Cylinder on the Basis of a Surrogate Model

Multi-dimensional T-S dynamic fault tree analysis method involving failure correlation

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