Herman Lepikson - Academia.edu (original) (raw)

Papers by Herman Lepikson

Editora Conhecimento Livre eBooks, 2021

This article will present the development of the discipline of Interdisciplinary Project-Digital ... more This article will present the development of the discipline of Interdisciplinary Project-Digital Design and Internet of Things, taught in the superior course of Digital Design, of Anhembi Morumbi University, through the application of the concepts of Active Methodologies. The principles inherent to projects related to the Internet of Things (IoT) such as efficiency, ease and intelligence, applied to current and future needs of society, will be demonstrated through the work of a group of students who have developed a device directed to the area of urban mobility For the help of users of collective public transportation in the city of São Paulo.

Brazilian Applied Science Review, 2020

RESUMO O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de qu... more RESUMO O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de qualidade. Apesar de existir essas orientações, o Brasil se encontra num patamar crítico em sua colocação na avaliação educacional do PISA. Esse artigo tem como objetivo demonstrar a evolução docente com a inserção de novos modelos pedagógicos provenientes de países com alto score no PISA. A revisão sistemática foi utilizada como ferramenta norteadora deste estudo para definição do banco de dados por palavras chaves. Concluiu-se que, quando bem adaptadas e com docentes treinados, as metodologias oferecem um impacto positivo para o aumento da qualidade em sala de aula destacando-se como fator positivo para o próximo ranking do Brasil no PISA. Palavras-chave: Melhoraria do ensino em sala, Ambientes interativos de aprendizagem, Estratégias de ensino/aprendizagem, Aprendizagem colaborativo, Desenvolvimento profissional de professores.

Blucher Engineering Proceedings, Dec 1, 2021

This article proposes an approach based on Industry 4.0 technologies for building smart-warehouse... more This article proposes an approach based on Industry 4.0 technologies for building smart-warehouses aiming to improve the performance of this logistic system operation. A general and scalable logical warehouse architecture was developed to increase the traceability, reliability, and agility of intralogistics activities. When modeling and simulating the proposal presented to build a testbed, potential gains were observed such as structuring and well-organized operations, orchestration of technological resources to improve logistical performance, reduction of human intervention in the process, increased productivity, and proof of operation errors.

One of the key problems faced by the companies nowadays is the management of their competitive po... more One of the key problems faced by the companies nowadays is the management of their competitive positions is an increasingly more complex environment. This paper places a discussion in the strategic position of the companies and analyses the consequences originating from this position, mainly the imposed need to conciliate two conflicting elements of one manufacturing company: the profusion of new and differentiated products, in detriment of manufacturing economy, which demands large batches and slight changes in its planning in order to get the best performance. After a brief context analysis, an approach to this conciliation is evaluated, based on flexible product design and manufacturing, oriented by technological patterns and organizational culture to achieve this goal.

In this time of frequent and quick changes, die and mold makers are being forced to implement new... more In this time of frequent and quick changes, die and mold makers are being forced to implement new technologies if they want to survive in their industry. This paper presents a didactic methodology for die and mold production in a manufacturing integrated system. It encloses the following manufacturing sectors: design, planning and production control, process planning and NC programming. The approach adopted focuses on the data transmission and retrieval, HSC (high speed cutting) milling, statistical process control and the relationship between its interfaces to manage the integration between the computational tool used for manufacturing planning and control.

This paper proposes a new machine tool structure design for machining based on a Delta Robot arch... more This paper proposes a new machine tool structure design for machining based on a Delta Robot architecture as object of study, known as Tsai's Manipulator, patented by Tsai in 1997. The new architecture employs only rotary joints instead of spherical ones as it is usual for Delta Robots. The rotary joints allow its mount under pretension to eliminate clearances or backlash, avoiding the use of expensive spherical joints. All the other mechanical parts are standard components, which makes the solution attractive in terms of cost. A simplified inverse kinematic solution over the one proposed by Tsai is presented, based on a practical approach. The simplified solution reduces the number of steps to solve the inverse kinematics without any loss of performance. In addition, a solution to deal with the coupled axis without parasitic motion is presented. To increase the accuracy and the stiffness of the robot, a special attention was given to the rotary joints using preload rotational ball bearing joints. The structure parts were manufactured mostly by laser cutting with almost no complementary machining processes. In order to evaluate the proposed solutions, a prototype was built and a dedicated control software was developed for this particular robot. Workpieces were milled with the robot to demonstrate its capability and the advantages regarding the proposed machine architecture.

Lecture notes in logistics, 2018

The advent of new technologies has brought new opportunities and challenges due to the complexity... more The advent of new technologies has brought new opportunities and challenges due to the complexity and growth of the solutions. Increasingly large equipment needs to be installed in increasingly remote and displaced locations from increasingly congested industrial centers. These challenges have led to studies in areas of knowledge that were dormant, such as the potential of using “lighter than air” aircraft for cargo transportation. Airships have characteristics that could be used to transport special and bulky cargoes, for example, wind turbine generators. This article evaluates in a conceptual and qualitative way the use of airships as an alternative means of transport for special and bulky loads.

Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro TecnologicoAs células fle... more Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro TecnologicoAs células flexíveis de manufatura (FMC's) colocaram-se em evidência quando ficou comprovada a eficácia dos seus conceitos para a moderna indústria de manufatura. Esta eficácia, entretanto, depende da harmonização de todo um elenco de recursos a tecnologia que, em sua maioria, ainda não estão devidamente amadurecidos. Tendem, por isso, a inviabilizar os investimentos feitos na introdução de FMC's. O objetivo do presente trabalho e o de pesquisar esses problemas de integração buscando, através do estudo da interação entre as diversas interfaces que compõem uma FMC, sugerir soluções padronizadas ou padronizáveis, sempre que possível. Pretende-se, desta forma, viabilizar a adoção gradual e modular dos diversos conceitos subjacentes as FMC's, permitindo caminhar na direção de fmc's "inteligentes" a partir de investimentos iniciais relativamente baixos. O estudo é sistematizado de forma a abranger todos os aspectos pertinentes, desde o contexto que envolve as FMC's (com destaque para o papel da tecnologia de grupo, do CAD e do CAPP) passando pelos aspectos físicos (como fabricação, transporte e inspeção) e lógicos (controle, fluxos de informações, bases de dados), até os aspectos de comunicação (com ênfase nas redes locais de comunicação para chão de fábrica). Permeando os diversos tópicos estudados, algumas contribuições são dadas no sentido de sugerir uma conceituação

All Days, May 27, 2015

The production and operations in oil and gas fields are getting more complex, with more and more ... more The production and operations in oil and gas fields are getting more complex, with more and more demanding restrictions for safety, energy efficiency, environment, which sets new technical challenges for automation and control. On the other hand, modeling and system identification tools and advanced control systems can be an important key to enhance stability and cost effectiveness and support the personnel (operators, engineers, etc.). This article will illustrate some results obtained with the application of modeling and advanced control systems for artificial lift using smart field technologies.

International Journal of Solids and Structures, Mar 1, 2020

Cross-spring pivots have been widely employed over the last decades in a broad variety of precisi... more Cross-spring pivots have been widely employed over the last decades in a broad variety of precision engineering applications due to the high motion repeatability achieved thanks to the absence of stick slip and clearance. In this paper, the non-linear effect of the anticlastic curvature of the leaf-springs is considered for the accurate analytical modeling of the elasto-kinematic behavior of cross-spring pivots. Finite element analyses (FEA), based on a non-linear thin-shell model, are carried out in order to compare them with the analytical results for the main performance parameters of this type of device, i.e. centershift, rotational stiffness and stress in the leaf-springs. Furthermore, an experimental setup is built to assess the applicability limits of both models. Finally, remarkable performance aspects of cross-spring pivots are discussed aiming for design improvements.

Journal of Bioengineering and Technology Apllied for Health, May 2, 2022

Pipelines are currently considered the safest means of transporting hydrocarbons. However, accide... more Pipelines are currently considered the safest means of transporting hydrocarbons. However, accidents with leaks in pipelines are still recurrent, despite safety regulations. Therefore, there is a need to detect these leaks efficiently and adapt to the environment. This article evaluates the possibilities that the ultrasonic technique presents for leaks detection in pipelines. An algorithm was used to divide into steps of importance, concepts such as technical feasibility, suitability, and capability. The method proves to be quite versatile and promises to be very accurate, an alternative for detecting leaks in long pipelines.

Blucher Engineering Proceedings, 2021

Blucher Engineering Proceedings, 2021

Researches data indicates that the search for cybersecurity professionals to protect industrial c... more Researches data indicates that the search for cybersecurity professionals to protect industrial control systems (ICS) in Brazil is increasing, as a result of the rise in cyber-attacks directed at the industry. However, there is a deficiency of professionals with the required competence in ICS cybersecurity, which involves the areas of information (IT) and operational technology (OT). On the other hand, there is a lack of educational institutions with the right strategies for training professionals who master the technologies required for the protection of ICS. This paper seeks to present a strategy to address this lack through the evaluation of indicative scenarios of practices for the development of competencies in ICS cybersecurity through the active problembased learning (PBL) methodology. The proposed scenarios combine the theory and practice involved in solving ICS cybersecurity problems, through the use of PBL with the support of SENAI CIMATEC's 4.0 Advanced Manufacturing Plant (AMP).

Applied Mechanics and Materials, 2017

Cyber-Physical Systems (CPS) are not a fad anymore, they are changing the way industries and comp... more Cyber-Physical Systems (CPS) are not a fad anymore, they are changing the way industries and companies plan and model their businesses in a distributed, dynamic, service-oriented way using virtualized resources that are scalable and accessed over the Internet. This change raises new challenges and opportunities for companies. In the last decade the industrial automation field has been introducing important technologies that are changing and integrating the Internet and other emerging technologies, concepts, methods and tools, such as cloud computing, agents and Service Oriented Architecture (SOA). These new approaches are resulting in the convergence of the physical world and the virtual world (cyberspace) in the direction of Industry 4.0. Industries are being forced to change and manage their IT and automation services through IT-enabled services to use new paradigms, and huge efforts of R & D are being made in this field. It is clear that in order to change the automation state ma...

Blucher Engineering Proceedings, 2020

Blucher Engineering Proceedings, 2019

Resumo: Um problema grave que ocorre entre caldeira e precipitador termostático é a entrada falsa... more Resumo: Um problema grave que ocorre entre caldeira e precipitador termostático é a entrada falsa de ar nos dutos de gases. A proposta deste trabalho foi apresentar e validar uma metodologia de inspeção externa destes dutos, durante operação da caldeira, por câmera termográfica embarcada em drone, para direcionar os devidos reparos durante o shutdown. Pela análise das imagens termográficas captadas, foram identificados 132 não conformidades nos dutos inspecionados, dos quais 20 foram referentes a pontos frios, como potenciais locais de entrada falsa de ar para os gases. Com a utilização da metodologia proposta neste trabalho, ficou bastante evidente os ganhos substanciais quanto a qualidade da informação produzida, reduções de custo e tempo operacional da inspeção e garantia da saúde e vida dos envolvidos.

Blucher Engineering Proceedings, 2019

Resumo: O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de q... more Resumo: O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de qualidade. Apesar de existir essas orientações, o Brasil se encontra num patamar crítico em sua colocação na avaliação educacional do PISA. Esse artigo tem como objetivo demonstrar a evolução docente com a inserção de novos modelos pedagógicos provenientes de países com alto score no PISA. A revisão sistemática foi utilizada como ferramenta norteadora deste estudo para definição do banco de dados por palavras chaves. Concluiu-se que, quando bem adaptadas e com docentes treinados, as metodologias oferecem um impacto positivo para o aumento da qualidade em sala de aula destacando-se como fator positivo para o próximo ranking do Brasil no PISA. Palavras-Chave: Melhoraria do ensino em sala; Ambientes interativos de aprendizagem; Estratégias de ensino/aprendizagem; Aprendizado colaborativo; Desenvolvimento profissional de professores.

Day 4 Thu, May 03, 2018, 2018

Challenged to remain competitive in a low oil price environment whilst navigating the energy tran... more Challenged to remain competitive in a low oil price environment whilst navigating the energy transition, the industry is now seeking ways to evolve operations through digitalisation. Robotics has already enabled an evolution of the Oil and Gas industry by enabling deepwater operations through the deployment of ROVs. Now the industry seeks to reduce the unit operating costs of offshore facilities whilst improving safety and environmental performance. Autonomous underwater vehicles (AUVs) such as FlatFish can help the industry achieve this objective by reshaping the concept of operations for subsea surveillance. Oil and gas operators stand to benefit from robotic technologies which have been successfully adopted in other industries such as aerospace and defence. Technologies that can perform autonomous subsea inspections and interventions: faster, safer, and cheaper than traditional approaches. Robotics and AI (Artificial Inteligence) can play a fundamental role in increasing the comp...

Journal of Physics: Conference Series, 2015

This article studies the setting of the method to model the inertial torque in the acceleration r... more This article studies the setting of the method to model the inertial torque in the acceleration regimes of a rotating axis system. The angular speed measurement to obtain an estimated acceleration and the moment of inertia axis of the variables are used to calculate the inertial torque. The evaluated dynamic regimes are acceleration ramps between levels (intervals) of angular speed, which are implemented using variable speed drives that are coupled to AC motors. The article focuses on assessing the main parameters in signal processing, such as the derivation of the speed signal, application of digital filters and data- smoothing methods, and their effects on the main features of interest in the generated torque curves, such as the peak torque amplitude, ascending and downward slopes, stability and repeatability. A qualitative approach was performed to identify the measurement uncertainty contributions. Thus, the validation methodology of the processing methods and the proposed physical principle are feasible.

The number of small torque applications is increasing continuously – in the industry as well as i... more The number of small torque applications is increasing continuously – in the industry as well as in the science. To ensure the function of these applications, the required torque should be known and should be realized with an appropriate uncertainty. This fact reinforces the need of a working traceability chain up to a primary torque standard for nominal torques in a range from 1 N·m to 10 mN·m with torque steps down to 1 mN·m. The achievable relative uncertainty of current torque standard machines (TSM's) for the small torque range is no longer sufficient, especially not for torques less than 100 mN·m. This paper deals with new promising approaches to reduce the relative uncertainty in TSM's significantly.

Editora Conhecimento Livre eBooks, 2021

This article will present the development of the discipline of Interdisciplinary Project-Digital ... more This article will present the development of the discipline of Interdisciplinary Project-Digital Design and Internet of Things, taught in the superior course of Digital Design, of Anhembi Morumbi University, through the application of the concepts of Active Methodologies. The principles inherent to projects related to the Internet of Things (IoT) such as efficiency, ease and intelligence, applied to current and future needs of society, will be demonstrated through the work of a group of students who have developed a device directed to the area of urban mobility For the help of users of collective public transportation in the city of São Paulo.

Brazilian Applied Science Review, 2020

RESUMO O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de qu... more RESUMO O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de qualidade. Apesar de existir essas orientações, o Brasil se encontra num patamar crítico em sua colocação na avaliação educacional do PISA. Esse artigo tem como objetivo demonstrar a evolução docente com a inserção de novos modelos pedagógicos provenientes de países com alto score no PISA. A revisão sistemática foi utilizada como ferramenta norteadora deste estudo para definição do banco de dados por palavras chaves. Concluiu-se que, quando bem adaptadas e com docentes treinados, as metodologias oferecem um impacto positivo para o aumento da qualidade em sala de aula destacando-se como fator positivo para o próximo ranking do Brasil no PISA. Palavras-chave: Melhoraria do ensino em sala, Ambientes interativos de aprendizagem, Estratégias de ensino/aprendizagem, Aprendizagem colaborativo, Desenvolvimento profissional de professores.

Blucher Engineering Proceedings, Dec 1, 2021

This article proposes an approach based on Industry 4.0 technologies for building smart-warehouse... more This article proposes an approach based on Industry 4.0 technologies for building smart-warehouses aiming to improve the performance of this logistic system operation. A general and scalable logical warehouse architecture was developed to increase the traceability, reliability, and agility of intralogistics activities. When modeling and simulating the proposal presented to build a testbed, potential gains were observed such as structuring and well-organized operations, orchestration of technological resources to improve logistical performance, reduction of human intervention in the process, increased productivity, and proof of operation errors.

One of the key problems faced by the companies nowadays is the management of their competitive po... more One of the key problems faced by the companies nowadays is the management of their competitive positions is an increasingly more complex environment. This paper places a discussion in the strategic position of the companies and analyses the consequences originating from this position, mainly the imposed need to conciliate two conflicting elements of one manufacturing company: the profusion of new and differentiated products, in detriment of manufacturing economy, which demands large batches and slight changes in its planning in order to get the best performance. After a brief context analysis, an approach to this conciliation is evaluated, based on flexible product design and manufacturing, oriented by technological patterns and organizational culture to achieve this goal.

In this time of frequent and quick changes, die and mold makers are being forced to implement new... more In this time of frequent and quick changes, die and mold makers are being forced to implement new technologies if they want to survive in their industry. This paper presents a didactic methodology for die and mold production in a manufacturing integrated system. It encloses the following manufacturing sectors: design, planning and production control, process planning and NC programming. The approach adopted focuses on the data transmission and retrieval, HSC (high speed cutting) milling, statistical process control and the relationship between its interfaces to manage the integration between the computational tool used for manufacturing planning and control.

This paper proposes a new machine tool structure design for machining based on a Delta Robot arch... more This paper proposes a new machine tool structure design for machining based on a Delta Robot architecture as object of study, known as Tsai's Manipulator, patented by Tsai in 1997. The new architecture employs only rotary joints instead of spherical ones as it is usual for Delta Robots. The rotary joints allow its mount under pretension to eliminate clearances or backlash, avoiding the use of expensive spherical joints. All the other mechanical parts are standard components, which makes the solution attractive in terms of cost. A simplified inverse kinematic solution over the one proposed by Tsai is presented, based on a practical approach. The simplified solution reduces the number of steps to solve the inverse kinematics without any loss of performance. In addition, a solution to deal with the coupled axis without parasitic motion is presented. To increase the accuracy and the stiffness of the robot, a special attention was given to the rotary joints using preload rotational ball bearing joints. The structure parts were manufactured mostly by laser cutting with almost no complementary machining processes. In order to evaluate the proposed solutions, a prototype was built and a dedicated control software was developed for this particular robot. Workpieces were milled with the robot to demonstrate its capability and the advantages regarding the proposed machine architecture.

Lecture notes in logistics, 2018

The advent of new technologies has brought new opportunities and challenges due to the complexity... more The advent of new technologies has brought new opportunities and challenges due to the complexity and growth of the solutions. Increasingly large equipment needs to be installed in increasingly remote and displaced locations from increasingly congested industrial centers. These challenges have led to studies in areas of knowledge that were dormant, such as the potential of using “lighter than air” aircraft for cargo transportation. Airships have characteristics that could be used to transport special and bulky cargoes, for example, wind turbine generators. This article evaluates in a conceptual and qualitative way the use of airships as an alternative means of transport for special and bulky loads.

Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro TecnologicoAs células fle... more Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro TecnologicoAs células flexíveis de manufatura (FMC's) colocaram-se em evidência quando ficou comprovada a eficácia dos seus conceitos para a moderna indústria de manufatura. Esta eficácia, entretanto, depende da harmonização de todo um elenco de recursos a tecnologia que, em sua maioria, ainda não estão devidamente amadurecidos. Tendem, por isso, a inviabilizar os investimentos feitos na introdução de FMC's. O objetivo do presente trabalho e o de pesquisar esses problemas de integração buscando, através do estudo da interação entre as diversas interfaces que compõem uma FMC, sugerir soluções padronizadas ou padronizáveis, sempre que possível. Pretende-se, desta forma, viabilizar a adoção gradual e modular dos diversos conceitos subjacentes as FMC's, permitindo caminhar na direção de fmc's "inteligentes" a partir de investimentos iniciais relativamente baixos. O estudo é sistematizado de forma a abranger todos os aspectos pertinentes, desde o contexto que envolve as FMC's (com destaque para o papel da tecnologia de grupo, do CAD e do CAPP) passando pelos aspectos físicos (como fabricação, transporte e inspeção) e lógicos (controle, fluxos de informações, bases de dados), até os aspectos de comunicação (com ênfase nas redes locais de comunicação para chão de fábrica). Permeando os diversos tópicos estudados, algumas contribuições são dadas no sentido de sugerir uma conceituação

All Days, May 27, 2015

The production and operations in oil and gas fields are getting more complex, with more and more ... more The production and operations in oil and gas fields are getting more complex, with more and more demanding restrictions for safety, energy efficiency, environment, which sets new technical challenges for automation and control. On the other hand, modeling and system identification tools and advanced control systems can be an important key to enhance stability and cost effectiveness and support the personnel (operators, engineers, etc.). This article will illustrate some results obtained with the application of modeling and advanced control systems for artificial lift using smart field technologies.

International Journal of Solids and Structures, Mar 1, 2020

Cross-spring pivots have been widely employed over the last decades in a broad variety of precisi... more Cross-spring pivots have been widely employed over the last decades in a broad variety of precision engineering applications due to the high motion repeatability achieved thanks to the absence of stick slip and clearance. In this paper, the non-linear effect of the anticlastic curvature of the leaf-springs is considered for the accurate analytical modeling of the elasto-kinematic behavior of cross-spring pivots. Finite element analyses (FEA), based on a non-linear thin-shell model, are carried out in order to compare them with the analytical results for the main performance parameters of this type of device, i.e. centershift, rotational stiffness and stress in the leaf-springs. Furthermore, an experimental setup is built to assess the applicability limits of both models. Finally, remarkable performance aspects of cross-spring pivots are discussed aiming for design improvements.

Journal of Bioengineering and Technology Apllied for Health, May 2, 2022

Pipelines are currently considered the safest means of transporting hydrocarbons. However, accide... more Pipelines are currently considered the safest means of transporting hydrocarbons. However, accidents with leaks in pipelines are still recurrent, despite safety regulations. Therefore, there is a need to detect these leaks efficiently and adapt to the environment. This article evaluates the possibilities that the ultrasonic technique presents for leaks detection in pipelines. An algorithm was used to divide into steps of importance, concepts such as technical feasibility, suitability, and capability. The method proves to be quite versatile and promises to be very accurate, an alternative for detecting leaks in long pipelines.

Blucher Engineering Proceedings, 2021

Blucher Engineering Proceedings, 2021

Researches data indicates that the search for cybersecurity professionals to protect industrial c... more Researches data indicates that the search for cybersecurity professionals to protect industrial control systems (ICS) in Brazil is increasing, as a result of the rise in cyber-attacks directed at the industry. However, there is a deficiency of professionals with the required competence in ICS cybersecurity, which involves the areas of information (IT) and operational technology (OT). On the other hand, there is a lack of educational institutions with the right strategies for training professionals who master the technologies required for the protection of ICS. This paper seeks to present a strategy to address this lack through the evaluation of indicative scenarios of practices for the development of competencies in ICS cybersecurity through the active problembased learning (PBL) methodology. The proposed scenarios combine the theory and practice involved in solving ICS cybersecurity problems, through the use of PBL with the support of SENAI CIMATEC's 4.0 Advanced Manufacturing Plant (AMP).

Applied Mechanics and Materials, 2017

Cyber-Physical Systems (CPS) are not a fad anymore, they are changing the way industries and comp... more Cyber-Physical Systems (CPS) are not a fad anymore, they are changing the way industries and companies plan and model their businesses in a distributed, dynamic, service-oriented way using virtualized resources that are scalable and accessed over the Internet. This change raises new challenges and opportunities for companies. In the last decade the industrial automation field has been introducing important technologies that are changing and integrating the Internet and other emerging technologies, concepts, methods and tools, such as cloud computing, agents and Service Oriented Architecture (SOA). These new approaches are resulting in the convergence of the physical world and the virtual world (cyberspace) in the direction of Industry 4.0. Industries are being forced to change and manage their IT and automation services through IT-enabled services to use new paradigms, and huge efforts of R & D are being made in this field. It is clear that in order to change the automation state ma...

Blucher Engineering Proceedings, 2020

Blucher Engineering Proceedings, 2019

Resumo: Um problema grave que ocorre entre caldeira e precipitador termostático é a entrada falsa... more Resumo: Um problema grave que ocorre entre caldeira e precipitador termostático é a entrada falsa de ar nos dutos de gases. A proposta deste trabalho foi apresentar e validar uma metodologia de inspeção externa destes dutos, durante operação da caldeira, por câmera termográfica embarcada em drone, para direcionar os devidos reparos durante o shutdown. Pela análise das imagens termográficas captadas, foram identificados 132 não conformidades nos dutos inspecionados, dos quais 20 foram referentes a pontos frios, como potenciais locais de entrada falsa de ar para os gases. Com a utilização da metodologia proposta neste trabalho, ficou bastante evidente os ganhos substanciais quanto a qualidade da informação produzida, reduções de custo e tempo operacional da inspeção e garantia da saúde e vida dos envolvidos.

Blucher Engineering Proceedings, 2019

Resumo: O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de q... more Resumo: O objetivo IV da agenda de 2030 da ONU mostra que é necessária educação equitativa e de qualidade. Apesar de existir essas orientações, o Brasil se encontra num patamar crítico em sua colocação na avaliação educacional do PISA. Esse artigo tem como objetivo demonstrar a evolução docente com a inserção de novos modelos pedagógicos provenientes de países com alto score no PISA. A revisão sistemática foi utilizada como ferramenta norteadora deste estudo para definição do banco de dados por palavras chaves. Concluiu-se que, quando bem adaptadas e com docentes treinados, as metodologias oferecem um impacto positivo para o aumento da qualidade em sala de aula destacando-se como fator positivo para o próximo ranking do Brasil no PISA. Palavras-Chave: Melhoraria do ensino em sala; Ambientes interativos de aprendizagem; Estratégias de ensino/aprendizagem; Aprendizado colaborativo; Desenvolvimento profissional de professores.

Day 4 Thu, May 03, 2018, 2018

Challenged to remain competitive in a low oil price environment whilst navigating the energy tran... more Challenged to remain competitive in a low oil price environment whilst navigating the energy transition, the industry is now seeking ways to evolve operations through digitalisation. Robotics has already enabled an evolution of the Oil and Gas industry by enabling deepwater operations through the deployment of ROVs. Now the industry seeks to reduce the unit operating costs of offshore facilities whilst improving safety and environmental performance. Autonomous underwater vehicles (AUVs) such as FlatFish can help the industry achieve this objective by reshaping the concept of operations for subsea surveillance. Oil and gas operators stand to benefit from robotic technologies which have been successfully adopted in other industries such as aerospace and defence. Technologies that can perform autonomous subsea inspections and interventions: faster, safer, and cheaper than traditional approaches. Robotics and AI (Artificial Inteligence) can play a fundamental role in increasing the comp...

Journal of Physics: Conference Series, 2015

This article studies the setting of the method to model the inertial torque in the acceleration r... more This article studies the setting of the method to model the inertial torque in the acceleration regimes of a rotating axis system. The angular speed measurement to obtain an estimated acceleration and the moment of inertia axis of the variables are used to calculate the inertial torque. The evaluated dynamic regimes are acceleration ramps between levels (intervals) of angular speed, which are implemented using variable speed drives that are coupled to AC motors. The article focuses on assessing the main parameters in signal processing, such as the derivation of the speed signal, application of digital filters and data- smoothing methods, and their effects on the main features of interest in the generated torque curves, such as the peak torque amplitude, ascending and downward slopes, stability and repeatability. A qualitative approach was performed to identify the measurement uncertainty contributions. Thus, the validation methodology of the processing methods and the proposed physical principle are feasible.

The number of small torque applications is increasing continuously – in the industry as well as i... more The number of small torque applications is increasing continuously – in the industry as well as in the science. To ensure the function of these applications, the required torque should be known and should be realized with an appropriate uncertainty. This fact reinforces the need of a working traceability chain up to a primary torque standard for nominal torques in a range from 1 N·m to 10 mN·m with torque steps down to 1 mN·m. The achievable relative uncertainty of current torque standard machines (TSM's) for the small torque range is no longer sufficient, especially not for torques less than 100 mN·m. This paper deals with new promising approaches to reduce the relative uncertainty in TSM's significantly.