Fault Tree Analysis: A Case Study from Machine Tool Industry

Patil, Rajkumar Bhimgonda; Mhamane, Digvijay A.; Kothavale, Pruthwiraj B; Kothavale, B. S.

doi:10.2139/ssrn.3382241

Cited by 9 publications

(5 citation statements)

References 8 publications

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“…Analyses of these fault trees are only performed on a qualitative level. The importance measure of a basic event (BE) cannot be mathematically calculated on a quantitative level [17], which helps to determine which components or parts of the system are more critical for risk management and decision making.…”

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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“…Such objects consist of a certain number of related elements [52][53][54]. Even one and the same object of research can be formed from different structures [55,56]. These structures are also not identical, and can have a different number of components [57,58].…”

Section: Model Descriptionmentioning

confidence: 99%

Mathematical Logic Model for Analysing the Controllability of Mining Equipment

Shishkin,

Malozyomov,

Martyushev

et al. 2024

Mathematics

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The issues of the evaluation and prediction of the reliability and testability of mining machinery and equipment are becoming particularly relevant, since the safety of technological processes and human life is reaching a new level of realisation due to changes in mining technology. The work is devoted to the development of a logical model for analysing the controllability of mining equipment. The paper presents a model of reliability of the operation of mining equipment on the example of a mine load and passenger hoist. This generalised model is made in the form of a graph of transitions and supplemented with a system of equations. The model allows for the estimation of the reliability of equipment elements and equipment as a whole. A mathematical and logical model for the calculation of the availability and downtime coefficients of various designs of mining equipment systems is proposed. This model became the basis for the methods to calculate the optimal values of diagnostic depth. At these calculated values, the maximum value of availability factor will be obtained. In this paper, an analytical study was carried out and dependences of the readiness factor of parameters of the investigated system such as the intensity of control of technical systems, intensity of failures, etc., were constructed. The paper proposes a mathematical model to assess the reliability of mine hoisting plants through its integration into the method of improving the reliability of mine hoisting plants.

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“…With this structural redundancy, the recovery time is reduced by optimizing organizational processes and reducing the failure recovery time. If the recovery time of the main equipment exceeds the time of switching to the standby equipment, then in this case the structural redundancy of the system becomes justified [37].…”

Section: Influence Of the Reliability Of Individual Elements On The O...mentioning

confidence: 99%

Development of a Mathematical Model of Operation Reliability of Mine Hoisting Plants

Shishkin,

Malozyomov,

Martyushev

et al. 2024

Mathematics

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The work analyzes the performance assurance of mine hoisting machines, including the problem of the quality of performance of the functions. The quality of functioning allows evaluation of a set of properties of the process of lifting loads, designed to meet the given requirements in accordance with the purpose and evaluated performance indicators. In this case, the quality of the function depends not only on the elements that worked properly or failed during system functioning but also on the moments involving certain changes in the states of the system. The considered system of power supply of mine hoisting installations is rather complex with respect to reliability. The proposed approach allows this rather complex system to lead in terms of the form of a serial connection of elements, allowing for determining the influence of the functioning of its subsystems and electrical equipment on the technological process of cargo lifting in a coal mine. The presented mathematical concept of increasing the reliability and failure-free operation of mine hoisting plants with the help of the developed mathematical model of the mine hoisting plant allowed studying the reliability indicators of the hoisting plant operation and reserving the equipment most effectively to increase reliability. The determination of coupling coefficients in this study made it possible to analyze the impact of the reliability of electrical equipment and power supply systems on the operation of technological machines to improve the reliability of mining equipment and the efficiency of technical systems of mining equipment.

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Fault Tree Analysis: A Case Study from Machine Tool Industry

Cited by 9 publications

References 8 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

Mathematical Logic Model for Analysing the Controllability of Mining Equipment

Development of a Mathematical Model of Operation Reliability of Mine Hoisting Plants

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