Dissertações
URI permanente para esta coleçãohttps://rigalileo.itegam.org.br/handle/123456789/174
Dissertações produzidas oriundas de convênios
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Resultados da Pesquisa
Item Aplicação do Método de Análise e Solução de Problemas (MASP) na Busca da Qualidade e Produtividade em uma Indústria de Móveis(Instituto de Tecnologia, 2018) Andréa Cláudia dos Anjos Martins; Prof. Dr. Jandecy Cabral LeiteThe dissertation addresses the application of the Problem Analysis and Solution Method (MASP) in a furniture industry, with the aim of improving quality and productivity. The study emphasizes the importance of Quality Tools in identifying and solving failures in production processes. The methodology used is based on a structured approach to problem analysis, following the MASP steps: problem identification, observation, analysis, action plan, execution, verification and standardization. The results demonstrate that the implementation of MASP allowed the identification of the main causes of the problems, enabling significant improvements in production efficiency and the quality of the final products. In addition, the study highlights the importance of employee involvement and the use of quantitative data to support decision-making. It is concluded that MASP is an effective tool for companies seeking to improve their production processes and achieve higher standards of quality and competitiveness in the market.Item Controle de Climatização Usando Controlador PID Ajustável com Uso da Lógica Fuzzy(Instituto de Tecnologia, 2018) Cavalcante, Caio César Paulino; Azevedo, Manoel Socorro SantosThe objective of this work is to present and evaluate a hybrid controller project that uses Fuzzy logic applied to a PID controller to be used in an HVAC (Heating, Ventilation and Air Conditioning) system. The simulations use the software Simulink, Matlab, Sketch Up and Energy Plus. The results indicate energy savings in the air conditioning system.Item Convergência Tecnológica para Redes Ethernet em Sistemas de Controle de Processo em Ferrovias(Instituto de Tecnologia, 2018) BORBA, Felipe Colares de; Kleber Bittencourt OliveiraThe main objective of this dissertation is to study the changes in the telecommunications field that railroads must face to avoid technological obsolescence in their automation, particularly railway signaling. The study focuses on the technological convergence to Ethernet interfaces. A literature review was conducted, followed by an analysis of the convergent technology (Ethernet) and the converged technology (RS-232). After these theoretical considerations, an Ethernet system topology was proposed for a hypothetical railway and implemented through a test setup. Tests were simulated using the standard reference protocol RFC 2455 to assess the capacity of the suggested Ethernet topology for railway applications. The practical results confirmed that the proposed topology meets all the necessary parameters for a telecommunications network supporting a railway signaling system. The conclusion is that railways can base their telecommunications systems on Ethernet technology while coexisting with legacy systems during the migration phase.Item Avaliação do Desgaste e Proposta para Recuperação das Roscas de Prensas Utilizadas para Extração de Óleos Vegetais(Instituto de Tecnologia, 2018) PRADO, Ferdinando do Socorro Soares do; Eduardo de Magalhães BragaThis work aims to evaluate the wear and propose a recovery procedure for expeller worms used in vegetable oil extraction in a large industry. The study can also be applied to other types of expellers used for the same purpose in the Amazon region. Tests were conducted on the base and abrasive materials, followed by operational wear assessment. Based on the analyses, a welding procedure was proposed to recover the worms, enhancing their strength and durability.Item Potencial de Inserção de Fontes Renováveis para Geração Elétrica na Matriz Energética do Estado do Maranhão(Instituto de Tecnologia, 2018) Ó, Franklin Roosevelt Rodrigues do; Nielson Fernando da Paixão RibeiroThe main objectives of this research are to evaluate the potential and prospects of exploration of renewable energy sources in the state of Maranhão, for conversion into electric energy, as well as to evaluate them. To this end, an introduction is made to the most relevant matrix of renewable energies, and it is broadly focused on the forms of energy conversion and existing technologies, both in application and in development, in Brazil and in the world. Research was done on the technical and economical feasibility for electric power generation from hydraulics, wind, solar, biomass, and oceanic sources, as well as the contribution of each one to the State Electric Matrix. The main projects for energy generation in operation and under implementation in the State were also presented, along with their respective economic, social, and environmental impacts. The technical information and data collection were obtained through bibliographic research, scientific articles, official websites of ANEEL, companies or organizations linked to the Ministry of Mines and Energy, and manufacturers, universities, and research centers. The work concludes by presenting a synthesis of Maranhão's potential and opportunities to expand the participation of renewable energies in the state’s electricity matrix, along with suggestions for future studies.Item Influência da variação de grãos de amido de arroz, mandioca e milho nas propriedades físicas, mecânicas e de fotodegradação de amido termoplástico(Instituto de Tecnologia, 2018) CRUZ, Isabela Cristina Rodrigues da; Edinaldo José de Sousa CunhaStarch has gained increasing interest as a biodegradable plastic due to its abundance, renewability, and low cost. Different types of starch grains form thermoplastics with varied physico-mechanical properties. This study analyzes the influence of different starch grains (rice, manioc, and corn) in biofilm production. Films were prepared by plasticization with glycerol in an aqueous medium at 100°C for 30 minutes and characterized by physical-chemical analysis, scanning electron microscopy (SEM), X-ray diffraction (XRD), optical microscopy, thermal analysis (TG/DTG), and mechanical tests. The results show that the geometry of the grains and the amylose/amylopectin ratio influence biofilm properties, affecting solubility, gelatinization time, and mechanical stability after radiation exposure.Item REDUÇÃO DO CUSTO DE PASTA DE SOLDA NO PROCESSO DE TECNOLOGIA DE MONTAGEM SUPERFICIAL (SMT)(Instituto de Tecnologia, 2021) CAMARGO, Marco Antônio de Almeida; BRAGA, Eduardo de MagalhãesThe Surface Mounting Technology (SMT) industries have faced constant challenges regarding environmental issues and cost reduction. The welding of electronic components traditionally incorporates lead, which presents environmental and financial risks due to the high cost of solder paste. The objective of this dissertation is to present the development of the local solder paste manufacturing process to reduce production costs while maintaining the quality and reliability of the product, especially in television electronic boards. The study includes a literature review on the SMT process and a case study in a factory located in the Manaus Industrial Pole (PIM). The results show that adopting local suppliers can generate significant savings by minimizing costs related to importation and logistics.Item Aplicação da Metodologia Manutenção Centrada na Confiabilidade no Sistema Hidráulico de um Descarregador de Vagões(Instituto de Tecnologia, 2021) ALMEIDA, Wemerson Egner; BRAGA, Eduardo de MagalhãesAPPLICATION OF THE RELIABILITY CENTERED MAINTENANCE METHODOLOGY IN THE HYDRAULIC SYSTEM OF A CAR DUMPER. This work proposes a set of maintenance techniques based on the Reliability Centered Maintenance (RCM) methodology applied to the hydraulic system of car dumpersItem Diagnóstico do Sistema de Regulação dos Pacientes para Cirurgias Eletivas do Município de Santarém - Pará(Instituto de Tecnologia, 2018) GONÇALVES, Leidiane Maria Silva; BATISTA, Clauderino da SilvaSantarém, being the second largest city in the State of Pará, serves as a point of access to several services for neighboring municipalities, especially in search of healthcare professionals and procedures at the Regional Hospital of Baixo Amazonas. This dissertation aims to diagnose patient access to the Medical Expertise sector (SEMSA) in the queue for elective orthopedic surgeries in Santarém. Profiles of patients (age, sex, municipality of origin, type of surgery performed) who sought orthopedic surgical care through SUS between 2015 and 2017 were analyzed, along with statistical analyses of the samples. Based on the data analysis, a conceptual method is proposed to optimize the waiting time for elective surgical proceduresItem Efeitos de Açúcares Extraídos de Raízes da Mandiocaba como Co-Plastificantes Glicerol/Mandioca e Glicerol/Mandiocaba(Instituto de Tecnologia, 2018) CHAVES, Lilia Eliza Monteiro; CUNHA, Edinaldo José de SousaThe effects of a Low Concentration Sugar Solution (SBCA), extracted from the mandiocaba bag in natura, as co-plasticizers in combination with glycerol were investigated for the production of thermoplastic starch (TPS) by the casting method, from the starch of mandiocaba and commercial cassava starch. The results were compared to the TPSs produced with water and glycerol, also investigated. Glycerol was reduced to 50% and 25%, substituting water for SBCA. Samples were analyzed by X-ray diffraction (XRD) after 15 days of aging, scanning electron microscopy (SEM), tensile strength (RT), elongation at break (ER), and water vapor permeability (PVA). The results showed that mandiocaba TPSs with SBCA decreased PVA to 90.2%; RT increased on average up to 7.72 times more; ER decreased by 13.4%; SEM showed voids caused by the reduction of glycerol and the use of SBCA