19 documents found, page 1 of 2
A manutenção na Gestão de ativos
Gaspar, Daniel Augusto Estácio Marques Mendes; Reguenga, Diana; Almeida, Nuno; Sobral, JoséO presente livro é resultado da firme parceria técnica luso-brasileira entre os coordenadores, a Fundec (Associação para a Formação e o Desenvolvimento em Engenharia Civil e Arquitectura), o IST (Instituto Superior Técnico de Lisboa), o Instituto de Engenharia e o Inbec (Instituto Brasileiro de Educação Continuada), que desde 2015 estão a realizar eventos em prol do desenvolvimento da Engenharia Diagnóstica, co...
Uma biografia breve da enguia: Do Mar dos Sargaços à Feira de São Mateus em Vis...
Carvalhas, Ana; Sobral, JoséAs enguias – consideramos a enguia europeia: Anguilla anguilla – são peixes que, em certos aspetos, permanecem ainda hoje misteriosos. O seu nascimento ocorre no longínquo Mar dos Sargaços, sendo arrastadas, pela Corrente do Golfo, através do Atlântico, durante cerca de três anos, até ao litoral europeu. Aqui, migram para os rios e estuários, adaptando-se, muito rapidamente, à vida em água doce. As enguias sofr...
Maintenance of technical installations in buildings based on asset life cycle a...
Sobral, José; Gaspar, D.; Almeida, N.This paper shows the importance of maintenance in buildings regarding the availability, reliability, maintainability, safety, and costs (RAMS+C) of the physical assets that make part of technical installations, taking into consideration all their life cycle. Some important standards related to asset management and maintenance are referred and some methodologies are described helping to understand the potential ...
Development of a tool for selection and acquisition of medical devices based on...
Oliveira, V.; Sobral, José; Ribeiro, M. MargaridaThe existence of a tool to select and acquire Medical Devices is fundamental to manage the Life Cycle (LC) of Medical Devices (MD). The objective of this work is to create a structured, organized and optimized application to use on the selection and acquisition stage of a tender process, in order to help those responsible for the decision make. In addition it will turn the process exempt and transparent. The me...
Assessment of the adequacy of safety barriers to hazards
Sobral, José; Guedes Soares, CarlosThe assessment of safety barriers performance is often achieved through tests or inspections in order to determine their availability or probability of failure on demand (PFD). The ultimate objective of these activities is to observe if the safety barrier is operational and to detect possible hidden failures. However, sometimes due to error in design or changes performed on the installation, the referred safety...
Review of condition-based maintenance strategies for offshore wind energy
Kang, Jichuan; Sobral, José; Guedes Soares, CarlosThe existing maintenance strategies of offshore wind energy are reviewed including the specific aspects of condition-based maintenance, focusing on three primary phases, namely, condition monitoring, fault diagnosis and prognosis, and maintenance optimization. Relevant academic research and industrial applications are identified and summarized. The state of art, capabilities, and constraints of condition-based ...
Measuring the efficiency of an industrial condition monitoring service
Sobral, José; Roque, A.The mode how industrial physical assets are maintained is very importante to assure high equipment availability. I tis importante to find a metric or a key indicator that will point out the effectiveness of such function. Once condition based maintenance is widely assumed to be one of the most importante maintenance strategies, it is fundamental to observe how assets are being monitored. The purpose of this pap...
Unmanned aerial vehicle safety assessment modelling through petri Nets
Gonçalves, P.; Sobral, José; Ferreira, L. A.Currently we are facing an increasing trend of use of Unmanned Aerial Vehicles (UAV) in various activities both civilian and military. Although there is no legal framework for the operation of these systems, regulatory authorities require the demonstration of a safety level equivalent to manned aircraft. It is known the high vulnerability of the UAV not only to unexpected failures of their systems but also to t...
Development of unmanned aerial vehicles maintenance strategy under an asset man...
Gonçalves, P.; Sobral, José; Ferreira, L. A.Many organizations in a large number of countries all around the world are now awaking for a new reality concerning potential applications for the usage of unmanned aerial vehicles (UAV) or unmanned aerial systems (UAS). What was initially strictly applied for military purposes or pure private entertainment has now widespread for other purposes as for example for book or pizza delivery to customers. In manned c...
Establishment of an initial maintenance program for UAVs based on reliability p...
Gonçalves, Paula; Sobral, José; Ferreira, LuísPurpose - The purpose of this paper is to illustrate how to develop a methodology to set up an initial maintenance program for unmanned aerial vehicles (UAVs) following the well-known Steering Maintenance Group logic method (MSG-3) and taking into account safety concerns based on items probabilities of failure. That is why it is stated that maintenance program is based on reliability principles. Design/methodol...