Qualitative and quantitative approaches to analyse reliability of a mechatronic system: a case

Sharma, Rajiv Kumar; Sharma, Pooja

doi:10.1007/s40092-015-0098-6

Cited by 27 publications

(16 citation statements)

References 41 publications

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“…To further confirm this assertion, a combination of two very popular risk assessments tools (fault tree analysis and reliability block diagram) was used to investigate one of the most recent power transformer bushing failures. Fault tree (FTA) [15,53,54,[65][66][67][68][69][70][71] and reliability block diagrams (RBD) [53,54,[72][73][74][75] are very illustrative performance evaluation tools that have been immensely used for investigating critical plant failures across a variety of industries within the last five decades.…”

Section: Ae1: Maintenance Strategy and Planning Activitiesmentioning

confidence: 99%

“…Based on this premise and to foster practical knowledge transfer, a team-based FTA was employed at PLN. It is vital to note that besides visually representing the relationships between various causal factors of an FTA, it is also possible to estimate the probability of occurrence of the "unwanted" or "top event" using Equations (1) and (2) [53,54,[65][66][67][68][69][70][71]76];…”

Section: Ae1: Maintenance Strategy and Planning Activitiesmentioning

confidence: 99%

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A Holistic Framework for Supporting Maintenance and Asset Management Life Cycle Decisions for Power Systems

Ayu¹,

Yunusa‐Kaltungo

2020

Energies

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The outburst of population as well as increasing industrialisation have triggered a very prominent imbalance between electricity demand and supply in emerging economies such as Indonesia. Based on this premise, electricity generation and distribution firms such as Perusahaan Listrik Negara (PLN) are faced with an urgent need to enhance availability and reliability through capacity expansion as well as the institutionalisation of cost-effective maintenance and asset management (MAM) principles. Some of the principles recommended here involve embedding customised overall health index (OHI) and total life cycle cost (LCC) estimation principles into engineering decisions that relate to asset renewal and/or replacement. While discussions about the fundamental theories and estimation approaches for OHI and LCC for power transformers (PTs) already exist in the current body of literature, however, they are mostly in a generic form which has somewhat limited proper implementation of these valuable principles in practice. This study is unique because it provides a very systematic framework towards achieving cost-effective MAM through a case study. Additionally, the proposed framework is all-encompassing, as it also assesses the impacts of human unreliability through the application or proven risk assessment techniques. The proposed framework commences with the evaluation of existing decision support system at PLN through a MAM audit, whereby the performance of the West Java arm of PLN with regards to critical MAM elements was examined.

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Section: Ae1: Maintenance Strategy and Planning Activitiesmentioning

confidence: 99%

Section: Ae1: Maintenance Strategy and Planning Activitiesmentioning

confidence: 99%

A Holistic Framework for Supporting Maintenance and Asset Management Life Cycle Decisions for Power Systems

Ayu¹,

Yunusa‐Kaltungo

2020

Energies

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“…Studied extensively in recent years, the fuzzy theory is an efficient tool for considering uncertainty in reliability analyses (Purba et al 2014;Sharma and Sharma 2015;Gupta et al 2016;Kumar and Goel 2017). Due to uncertainty and imprecision, it is not easy to estimate dependent and independent failure rates.…”

Section: Literature Reviewmentioning

confidence: 99%

MTBF evaluation for 2-out-of-3 redundant repairable systems with common cause and cascade failures considering fuzzy rates for failures and repair: a case study of a centrifugal water pumping system

2017

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In many cases, redundant systems are beset by both independent and dependent failures. Ignoring dependent variables in MTBF evaluation of redundant systems hastens the occurrence of failure, causing it to take place before the expected time, hence decreasing safety and creating irreversible damages. Common cause failure (CCF) and cascading failure are two varieties of dependent failures, both leading to a considerable decrease in the MTBF of redundant systems. In this paper, the alpha-factor model and the capacity flow model are combined so as to incorporate CCF and cascading failure in the evaluation of MTBF of a 2-out-of-3 repairable redundant system. Then, using a transposed matrix, the MTBF function of the system is determined. Due to the fact that it is difficult to estimate the independent and dependent failure rates, industries are interested in considering uncertain failure rates. Therefore, fuzzy theory is used to incorporate uncertainty into the model presented in this study, and a nonlinear programming model is used to determine system's MTBF. Finally, in order to validate the proposed model, evaluation of MTBF of the redundant system of a centrifugal water pumping system is presented as a practical example.

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“…RCA technique in the problem-solving process helps teams to acknowledge the causal effect relationship of failures to eliminate or reduce the potency of repetition in the future [6]. One of the methods that complement the RCA process is FTA [7], [8], which is frequently used for reliability analysis in critical systems [9], [10], and [11]. Other approaches that can be used to prevent product damage due to system or process failures before the problem occurs can be made through FMEA [12], [13] to improve the quality and analysis of product inconsistency [14].…”

Section: Introductionmentioning

confidence: 99%

Problem-solving step analysis for increasing tire static balance levels: a case study

Febriana¹,

Herlambang²,

Hernadewita³

et al. 2021

j. sist. manaj. ind.

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One of the company's efforts in implementing the commitment to customer satisfaction is carried out through continuous improvement activities. All indicators are evaluated to determine the level of quality stability against process variations that will impact non-compliance with predetermined product specifications. One of the quality problems found in the tire manufacture industry is the out-percentage of tire uniformity, which suddenly increases, one of which is the value of static balance. This study analyses the process variation factors that occur to take corrective and preventive actions through a series of Root Cause Analysis (RCA), Fault Tree Analysis (FTA), and Failure Mode and Effect Analysis (FMEA). Refers to the analysis result, it was found that there was a problem with the rubber film gauge variation at the manufacturing step of the steel breaker, one of the material components in the tire construction. Two main factors cause rubber film thickness variation: rubber sticky with roll calendar, Radial Run Out (RRO) Roll Calendar out standard, and viscosity compound variation with 12 root problems found. The results of the improvements that have been made can effectively improve rubber film thickness variation, increase the Cpk level of steel breaker material from 0.82 to 1.91 and reduce the out percentage ratio of static balance by 54.65%.

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Qualitative and quantitative approaches to analyse reliability of a mechatronic system: a case

Cited by 27 publications

References 41 publications

A Holistic Framework for Supporting Maintenance and Asset Management Life Cycle Decisions for Power Systems

A Holistic Framework for Supporting Maintenance and Asset Management Life Cycle Decisions for Power Systems

MTBF evaluation for 2-out-of-3 redundant repairable systems with common cause and cascade failures considering fuzzy rates for failures and repair: a case study of a centrifugal water pumping system

Problem-solving step analysis for increasing tire static balance levels: a case study

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