Roberto Outa, Fabio Roberto Chavarette, Vishnu Narayan Mishra, Aparecido C. Gonçalves, Luiz G.P. Roefero and Thiago C. Moro
In recent years, the mechanical industries began to apply many investments in research and technological development to obtain efficient methods to analyze the integrity of…
Abstract
Purpose
In recent years, the mechanical industries began to apply many investments in research and technological development to obtain efficient methods to analyze the integrity of structures and prevent disasters and/or accidents, ensuring people’s lives and preventing economic losses. Any structure, whether mechanical or aeronautical, before being put into use undergoes a structural integrity assessment and testing. In this case, non-destructive evaluations are performed, aiming to estimate the degree of safety and reliability of the structure. For this, there are techniques traditionally used such as ultrasonic inspection, X-ray, acoustic emission tests, among other techniques. The traditional techniques may even have a good instrumental apparatus and be well formulated for structural integrity assessment; however, these techniques cannot meet growing industrial needs, even more so when structures are in motion. The purpose of this paper is to demonstrate artificial immune systems (AISs), ate and strengthen the emergence of an innovative technological tool, the biological immune systems and AISs, and these are presented as computing methods in the field of structural health monitoring (SHM).
Design/methodology/approach
The concept of SHM is based on a fault detection mechanism used in industries, and in other applications, involving the observation of a structure or a mechanical system. This observation occurs through the dynamic response of periodic measurements, later related to the statistical analysis, determining the integrity of the system. This study aims to develop a methodology that identifies and classifies a signal in normal signals or in faults, using an algorithm based on artificial immunological systems, being the negative selection algorithm, and later, this algorithm classifies the failures in probabilities of failure and degree of fault severity. The results demonstrate that the proposed SHM is efficient and robust for prognosis and failure detection.
Findings
The present study aims to develop different fast access methodologies for the prognosis and detection of failures, classifying and judging the types of failures based on AISs. The authors declare that the present study was neither published in any other vehicle of scientific information nor is under consideration for publication in another scientific journal, and that this paper strictly followed the ethical procedures of research and publication as requested.
Originality/value
This study is original by the fact that conventional structural integrity monitoring methods need improvements, which intelligent computing techniques can satisfy. Intelligent techniques are tools inspired by natural and/or biological processes and belong to the field of computational intelligence. They present good results in problems of pattern recognition and diagnosis and thus can be adapted to solve problems of monitoring and identifying structural failures in mechanical and aeronautical engineering. Thus, the proposal of this study demonstrates and strengthens the emergence of an innovative technological tool, the biological immune system and the AIS, and these are presented as computation methods in the field of SHM in rotating systems – a topic not yet addressed in the literature.
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Aparecido Carlos Gonçalves and Linilson Rodrigues Padovese
The purpose of this paper is to provide information on lubricant contamination by biodiesel using vibration and neural network.
Abstract
Purpose
The purpose of this paper is to provide information on lubricant contamination by biodiesel using vibration and neural network.
Design/methodology/approach
The possible contamination of lubricants is verified by analyzing the vibration and neural network of a bench test under determinated conditions.
Findings
Results have shown that classical signal analysis methods could not reveal any correlation between the signal and the presence of contamination, or contamination grade. On other hand, the use of probabilistic neural network (PNN) was very successful in the identification and classification of contamination and its grade.
Research limitations/implications
This study was done for some specific kinds of biodiesel. Other types of biodiesel could be analyzed.
Practical implications
Contamination information is presented in the vibration signal, even if it is not evident by classical vibration analysis. In addition, the use of PNN gives a relatively simple and easy‐to‐use detection tool with good confidence. The training process is fast, and allows implementation of an adaptive training algorithm.
Originality/value
This research could be extended to an internal combustion engine in order to verify a possible contamination by biodiesel.
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Aparecido Carlos Gonçalves, Rodrigo Carvalho Cunha and Daniel Fabiano Lago
The purpose of the paper is to provide information on wear debris on oil and vibration analysis as predictive maintenance techniques in reducer.
Abstract
Purpose
The purpose of the paper is to provide information on wear debris on oil and vibration analysis as predictive maintenance techniques in reducer.
Design/methodology/approach
The estate of a reducer is verified by analyzing the vibration and oil conditions of a test rig under well‐designed conditions utilizing some predictive variables.
Findings
According to the vibration and oil analysis it is found out what it was happening into the reducer without disassembling it.
Practical implications
This paper demonstrates the use of oil debris analysis and vibration analysis as a technique that enhances preventive maintenance practices. The paper helps practitioners to utilize these techniques more effectively.
Originality/value
This paper gives information about two predictive maintenance techniques with a test rig.
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Aparecido Carlos Gonçalves, Rodrigo Carvalho Cunha and Daniel Fabiano Lago
This paper aims to provide information on wear debris on oil and vibration analysis as predictive maintenance techniques.
Abstract
Purpose
This paper aims to provide information on wear debris on oil and vibration analysis as predictive maintenance techniques.
Design/methodology/approach
The estate of a reducer is verified by analyzing the vibration and oil conditions of a test rig under some variables.
Findings
According to the vibration and oil analysis it was found what was happening in the reducer without disassembling it.
Originality/value
This paper gives information about two predictive maintenance techniques with a test rig.
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Daniel Bernardo Ribeiro, Aparecido dos Reis Coutinho, Walter Cardoso Satyro, Fernando Celso de Campos, Carlos Roberto Camello Lima, José Celso Contador and Rodrigo Franco Gonçalves
Construction industry (CI) has great prominence for the world economy, and it is expected that, with the use of the innovative technologies and approaches of Industry 4.0 (I4.0)…
Abstract
Purpose
Construction industry (CI) has great prominence for the world economy, and it is expected that, with the use of the innovative technologies and approaches of Industry 4.0 (I4.0), the new industrial paradigm, construction can reach higher levels of productivity. This study aims to develop a model (readiness model) to assess the level of use of I4.0 technologies by the construction sector in Brazil and its most relevant applications.
Design/methodology/approach
The methodology used was bibliographic research, design-science research and a survey to validate the model, carried out with 162 companies, considered among the main ones in the sector in Brazil. The literature review revealed 13 technologies of I4.0 applied to construction; hence, the views of industry experts were based on these technologies.
Findings
The Digital Advancement Within CoNstruction (DAWN) readiness model was proposed, showing that among the 13 evaluated technologies of I4.0 and their applications, the Brazilian construction companies had a low level of utilization; both high and middle-income companies presented this low level of use; some technologies with a greater number of scientific publications were less used in practice in the Brazilian construction.
Originality/value
The originality and theoretical contribution are to present a readiness model to assess the level of use of I4.0 technologies and their most relevant applications in the CI in countries with an economy similar to Brazil’s, making it possible to measure the level of adoption of these technologies.
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Izabela Simon Rampasso, Sidney L.M. Mello, Rubens Walker, Victor G. Simão, Robson Araújo, Juliana Chagas, Osvaldo Luiz Gonçalves Quelhas and Rosley Anholon
The objective of this study is to identify research gaps related to skills required for Industry 4.0, considering research in the context of Brazilian undergraduate courses. In…
Abstract
Purpose
The objective of this study is to identify research gaps related to skills required for Industry 4.0, considering research in the context of Brazilian undergraduate courses. In this sense, the question of this study was established: What are the educational gaps related to skills required in Industry 4.0 context, considering considering research in the previously mentioned?
Design/methodology/approach
To answer this question, the ten top work-related skills required for professionals in Industry 4.0 published by the World Economic Forum were used to perform a systematic literature review. From this review, 100 articles were found in the searched databases. From them, 18 were within the research scope.
Findings
Through an analysis of their content, it was possible to verify that, from the 10 skills analyzed, only six were identified in the articles. That is, no research was found for: people management, service orientation, negotiation, and cognitive flexibility. Additionally, there are undergraduate courses that are not considered in current researches and should be analyzed.
Originality/value
The gaps pointed out in this study are relevant to guide future analyzes of the Brazilian educational model and may provide insights for research in other countries.
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Greici Sarturi, Carlos Augusto França Vargas, João Maurício Gama Boaventura and Silvio Aparecido dos Santos
The purpose of this paper is to deepen the discussion regarding the competitiveness of clusters based on a theoretical and empirical study that compares the level of…
Abstract
Purpose
The purpose of this paper is to deepen the discussion regarding the competitiveness of clusters based on a theoretical and empirical study that compares the level of competitiveness of the Brazilian wine cluster located in Serra Gaúcha with the competitiveness of the Chilean cluster located in Valle del Maule.
Design/methodology/approach
A qualitative-descriptive approach was applied to the study, and data collection was conducted through secondary sources.
Findings
The analysis employed a competitiveness analysis model consisting of 11 competitiveness factors. The Chilean cluster presented a higher level of competitiveness in four competitiveness factors (“scope of viable and relevant business,” “introduction of new technologies,” “balance with no privileged positions” and “oriented strategy”), while the Brazilian cluster presented a higher level of competitiveness in three competitiveness factors (“concentration,” “cooperation” and “replacement”). For four of the competitiveness factors of the model, both clusters presented similar levels of competitiveness.
Practical implications
By comparing the two wine clusters, it was possible to identify aspects that can be improved to increase competitiveness, especially in the Brazilian cluster. These aspects include, first, the need for bottle manufacturers in Serra Gaúcha, which would have a positive impact on production costs; second, the expansion of the geographical indication registration for the entire Serra Gaúcha region, resulting in an enhanced image of Brazilian wine abroad; and third, greater incentives for exports, which would result in an increase in market share.
Originality/value
The paper proposes an explanation for the superior level of competitiveness of the Chilean cluster regarding the “scope of viable and relevant business,” “balance with no privileged positions,” “introduction of new technologies” and “strategy focussed on cluster development.” In terms of its contribution, the study developed additional metrics for the model adopted, which can be used for the competitive analysis of other agribusiness clusters.