Multi-agent replicator controller for sustainable vibration control of smart structures

Developed in the artificial intelligence community, an intelligent agent is an autonomous abstract or software entity that observes through sensors and acts upon an environment in an adaptive or intelligent manner. In a centralized control system, one central controller uses the global measurement data collected from all the sensors installed in the structure to make control decisions and to dispatch them to control devices. The centralized controller itself represents a single point of potential failure. To overcome this shortcoming, decentralized control is used to improve redundancy. This paper introduces three ideas to vibration control of smart structures: agent technology, replicator dynamics from evolutionary game theory, and energy minimization. It presents two new methods: 1) a single-agent Centralized Replicator Controller (CRC) and a decentralized Multi-Agent Replicator Controller (MARC) for vibration control of smart structures. The use of agents and a decentralized approach enhances the robustness of the entire vibration control system. The proposed control methodologies are applied to vibration control of a 3-story steel frame and a 20-story steel benchmark structure subjected to two sets of seismic loadings: historic earthquake accelerograms and artificial earthquakes and compared with the corresponding centralized and decentralized conventional Linear Quadratic Regulator (LQR) control algorithm

Utilização do modelo SCRUM na Megasis

Mestrado em Gestão de Sistemas de InformaçãoO presente Trabalho Final de Mestrado tem como objetivo descrever todas as atividades desenvolvidas durante a realização do estágio curricular no Centro de Business Intelligence da Megasis/TAP IT, colocando em prática e consolidando conhecimentos adquiridos ao longo do mestrado. Aborda um conjunto de atividades que permitem a automatização de vários processos manuais associados ao modelo Agile de desenvolvimento de software e dá também a conhecer como é aplicada a metodologia Scrum num departamento de Business Intelligence. O relatório começa por dar conta da revisão da literatura explicando o que é o scrum, quem são os participantes e quais as coreografias. De seguida, são descritas as atividades desenvolvidas no estágio, desde o enriquecimento do modelo de dados de scrum com novos conceitos como também a criação de relatórios e dashboards, sendo estes o output final da solução de BI. É feita uma análise critica comparando a literatura existente e as atividades do estágio assim como uma apreciação pessoal sobre as mesmas. As atividades são descritas e acompanhadas com o anexo de imagens dos vários dashboards criados.The purpose of this master's Report is to describe all the activities developed during the internship at the Megasis/TAP IT Business Intelligence Center, putting into practice and consolidating knowledge acquired through out the master's program. It addresses a set of activities that allow the automation of several manual processes associated with the Agile model of software development. It also shows how the Scrum model is applied in a Business Intelligence Department. The literature review describes topics such scrum, the participants and the events. What it comes next is the description of the activities of the internship, the enrichment of the model of scrum with new concepts and last the dashboards and reports that are the BI final solution output. A critical analysis, as well as a personal assessment, is made comparing the existing literature and the internship activities. The activities are described and accompanied by image attachments of the various dashboards created.info:eu-repo/semantics/publishedVersio