On the Use of Wavelet Transform for Practical Condition Monitoring Issues

Delvecchio, Simone

doi:10.5772/35964

Cited by 7 publications

(7 citation statements)

References 27 publications

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“…In addition, its noise is around 50 dB (decibels), consequently the machine does not need to be enclosed as the bench tests. Another important benefit of the Cold Test is the detection of failures before the parts are loose or even break, due to dynamic analysis of its vibration sensors (Delvecchio, 2012;Martyr & Plint, 2012).…”

Section: Cold Test Versus Hot Testmentioning

confidence: 99%

“…(Atkins, 2009;Ferguson & Kirkpatrick, 2015;Martyr & Plint, 2011). However, it has been gaining space in the quality assessment y of engines another method called Cold Test, which does not need engine combustion (Delvecchio, 2012;Delvecchio et al, 2007;Gagneur, 1999). …”

Section: Introductionmentioning

confidence: 99%

“…The evolution of the use of Cold Test in petrol engines and the same trend in diesel engines, whether by market requirements or by reducing test time and even reducing environmental impact, show a tendency for its use (Delvecchio, 2012;Delvecchio et al, 2007). Thus, this research finds its motivation from the following question: In the case of diesel engines, is it possible the full replacement of Hot Test by the Cold Test?…”

Section: Introductionmentioning

confidence: 99%

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Comparação entre os processos de Cold Test e Hot Test em uma empresa fabricante de motores diesel

2018

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Resumo: O teste a frio (Cold Test) é um processo inovador no Brasil com relação aos testes em motores diesel. Esse processo foi implementado em uma empresa fabricante de motores diesel, com o intuito Abstract:The Cold Test is an innovative process in Brazil regarding the tests in diesel engines. This process was implemented in a diesel engine company with the intention of becoming the main validation test before engines are sent to customers. Based on this hypothesis, the main reason of this investigation is to test whether it is possible to replace the Hot Test with the Cold Test. This was a shocking question, since the Hot Test is a reliable and established process for over 18 years. This research used a case study method. The detailed research has identified several criteria for comparing the two processes, such as: flowcharts, effectiveness, efficiency, complexity, approval levels, on-board worksheets and company FMEA documents. The results showed that the Cold Test process is more advantageous and sustainable, however the two processes are complementary. The study proved that the fully replacement of the Hot Test by the Cold Test is not possible, mainly the Cold Test process fails in detecting leaks.

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Section: Cold Test Versus Hot Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparação entre os processos de Cold Test e Hot Test em uma empresa fabricante de motores diesel

2018

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“…These tools record and evaluate measurable parameters that will be reviewed in this section such as vibration monitoring, acoustic and ultrasonic monitoring, thermography and oil analysis. CM is identified in phases between data acquisition, signal pre-processing and feature extraction, signal analysis and fault detection, leading to decision-making and failure prognostics (Delvecchio, 2012). This section is focused on the first phase of data acquisition.…”

Section: Condition Monitoring (Cm) Technologiesmentioning

confidence: 99%

Dynamic risk and reliability assessment for ship machinery decision making

Dikis¹,

Lazakis²,

Michala³

et al. 2016

Risk, Reliability and Safety: Innovating Theory and Practice

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The proposed research, through INCASS (Inspection Capabilities for Enhanced Ship Safety) FP7 EU funded research project tackles the issue of predictive ship machinery inspection by enhancing reliability and safety, avoiding accidents, and protecting the environment. This paper presents the development of Machinery Risk/Reliability Analysis (MRA). The innovation of this model is the consideration and assessment of components' risk of failure and reliability degradation by utilizing raw input data. MRA takes into account the system's dynamic state change, concerning failure rate variation over time. The presented methodology involves the generation of Markov Chains integrated with the advantages of Bayesian Belief Networks (BBNs). INCASS project developed a measurement campaign, where real time sensor data is recorded onboard a tanker, bulk carrier and container ship. The gathered data is utilized for MRA DSS tool validation and testing. Following research involves components and systems interdependencies and feed the continuous dynamic probabilistic condition monitoring algorithm.

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“…As a result, there is a constant pressure on research and development of reliable techniques for detection of technical condition of systems. Among various research activities one can recall: the use of new techniques of signal processing [1][2][3], the application of new measurement strategies [4,5] such as sensors embedded in structure [6] or the use of different physical phenomena for the detection of early stages of failures [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Teager-Kaiser energetic trajectory for machine diagnosis purposes

Gałęzia¹

2017

J. vibroeng.

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Increased requirements regarding safety, reliability and early detection of failures of industrial machines stimulate the development of new methods and tools for purposes of condition monitoring. The paper presents original concept of the Teager-Kaiser energetic trajectory representing an examined signal on the Teager-Kaiser energy plane. The Teager-Kaiser energetic trajectory illustrates simultaneously changes of instantaneous values of the Teager-Kaiser energy indicator and the velocity of change of the energy indicator.At the beginning of the paper, the Teager-Kaiser energetic trajectory is presented and described followed by examples of trajectories of simulated signals. In the next section, the author presents and discusses the model of signal simulating occurrence of a failure in a gearbox. Finally, the paper presents representations of signals recorded form gearbox during fatigue tests. The paper concludes with the discussion on application options of the Teager-Kaiser energetic plane in condition monitoring of rotation machinery.

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On the Use of Wavelet Transform for Practical Condition Monitoring Issues

Cited by 7 publications

References 27 publications

Comparação entre os processos de Cold Test e Hot Test em uma empresa fabricante de motores diesel

Comparação entre os processos de Cold Test e Hot Test em uma empresa fabricante de motores diesel

Dynamic risk and reliability assessment for ship machinery decision making

Teager-Kaiser energetic trajectory for machine diagnosis purposes

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