Appraisal of a New Safety Assessment Method using the Petri Nets for the Machines Safety

Caterino, Mario; Fera, Marcello; Macchiaroli, R.; Lambiase, Alfredo

doi:10.1016/j.ifacol.2018.08.488

Cited by 13 publications

(7 citation statements)

References 11 publications

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“…All structural components of a commercial aircraft are inspected at regular intervals following the predictive maintenance approach, since repairs and overhauls are pre-programmed. If continuous structure monitoring tools were available, the revisions could be made whenever and wherever they are necessary, [1][2][3] saving both direct maintenance costs and time spent on each revision.…”

Section: Introductionmentioning

confidence: 99%

On the Prediction of Guided Wave Dispersion Curves in Plates for Health Monitoring Applications

Perfetto

Luca

Lamanna

et al. 2021

Macromolecular Symposia

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In the last years, a significant interest has been pointed out in the capability of ultrasonic guided waves as candidate tool for structural health monitoring (SHM), due to their high damage detection sensitivity and low power consumption. The monitoring of the structural health through the propagation of guided waves is complex: some wave phenomena, namely dispersion and slowness, together with boundary scattered waves, may mask the presence of damages. So, studying the dispersion phenomenon through the dispersion curves may be helpful in understanding the propagation mechanisms. As Lamb waves dispersion equations do not generally have analytical solutions, the development of a predictive finite element (FE) model can be a valuable tool for the improvement of SHM systems, avoiding the high cost of experimental campaigns. Thus, once calibrated with respect to an experimental test case, the developed FE model can be used to simulate and predict guided-wave propagation mechanisms in a given structure. This leads to the possibility of employing such approach to identify and localize potential structural damages, that is the final aim of an SHM system. In this work, the FE method, together with an in-house code, has been used to investigate guided wave dispersion phenomenon in plates for possible SHM applications.

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Section: Introductionmentioning

confidence: 99%

On the Prediction of Guided Wave Dispersion Curves in Plates for Health Monitoring Applications

Perfetto

Luca

Lamanna

et al. 2021

Macromolecular Symposia

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“…They are also increasingly used for system safety, reliability and risk evaluation. Caterino et al [48] present a new assessment method, also adapted to a specific risk, such as the mechanical one, using as assessment tools the check-list and Petri Nets. Eisenberger & Fink [49] mention that several types of Petri nets with different properties have been introduced.…”

Section: Petri Netsmentioning

confidence: 99%

Contributions of Petri Nets to the Reliability and Availability of an Electrical Power System in a Big European Hospital - A Case Study

Pinto

Farinha²,

Singh³

2021

Wseas Transactions on Systems and Control

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The energy power supply infrastructure of a hospital, to function correctly, needs to be well maintained to ensure its reliability and, by consequence, the maximum integrated availability. In this paper, the authors propose the use of Petri Nets to help the improvement of the electric power system reliability, having as a case study a big European Hospital. The purpose of the research is to identify and analyse the potential failures of the system and to suggest solutions to improve the operations and maintenance to maximise the availability and reliability of those assets through possible and objective answers. It was necessary to develop a diagnosis and planning methodology to assess the reliability of several components of the energy power supply system. It is dynamic modelling based on a block diagram of the system and transposed to representation by Petri Nets. The analysis and the simulation of the discrete events of the system, as well as the visualisation of the process functioning and the communications inside, was made. Additionally, they were referred to other approaches, like the Fuzzy Petri Nets and Stochastic Petri Nets, as well as a future balance about its application in a situation like the analysed in this paper

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“…The expert system described in this paper was designed as a succession of questions regarding the possibility of the occurrence of the causes that could lead to the occurrence of the risks. [6] Example: The additives used comply with the standard or technical specifications?…”

Section: Inferencingmentioning

confidence: 99%

Research Regarding Development of Expert Systems for Polymeric Products Design and Manufacturing

Cristian

Gheorghe

2020

Macromolecular Symposia

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Polymeric products design and manufacturing is a complex industrial process that combines elements of chemical composition of plastics with injection modeling technology designed to optimize economic and technical parameters. A number of risks can disrupt the proper execution of the works and consequently alter the technical and economic objectives. In this paper the results of research regarding expert system for polymeric products design and manufacturing are presented. This system determines the level of risk of the different execution stages by risk identification and qualitative assessment through a series of predefined questions and hypothetical answers.

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Appraisal of a New Safety Assessment Method using the Petri Nets for the Machines Safety

Cited by 13 publications

References 11 publications

On the Prediction of Guided Wave Dispersion Curves in Plates for Health Monitoring Applications

On the Prediction of Guided Wave Dispersion Curves in Plates for Health Monitoring Applications

Contributions of Petri Nets to the Reliability and Availability of an Electrical Power System in a Big European Hospital - A Case Study

Research Regarding Development of Expert Systems for Polymeric Products Design and Manufacturing

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