http://repositorio.ufgd.edu.br/jspui/handle/prefix/4195 Sun, 30 Aug 2026 08:11:18 GMT 2026-08-30T08:11:18Z http://repositorio.ufgd.edu.br/jspui/handle/prefix/6977 Título: Análise de eficiência, gases de exaustão e consumo de combustível de um gerador acoplado com motor de ignição por compressão trabalhado a diesel comum Autor(es): Flor, Henrique dos Santos Primeiro Orientador: Silva, Ramon Eduardo Pereira Abstract: In many regions of Brazil, especially localities not integrated into the National Interconnected System (SIN), the electricity supply depends predominantly on diesel-powered generator sets. These systems are essential to guarantee access to energy, but their operation is associated with high fuel costs and the emission of atmospheric pollutants. In this context, the evaluation of the energy and environmental performance of diesel engines becomes important for optimizing power generation and reducing environmental impacts, in addition to providing a basis of comparison for similar studies conducted with fuels, such as biodiesel, that can be produced from vegetable crops present in these remote locations, even touching on the promotion of the local economy from this exploitation. This study aims to analyze the behavior of a two-cylinder diesel engine operating with commercial mineral diesel under different load conditions, simulating situations typical of demand in power generation systems. The tests were conducted on an instrumented experimental test bench for monitoring the engine's main operating parameters. Three load points were evaluated, corresponding to 9,5%, 18,9%, and 28,4% of the equipment's available power. During the tests, the specific fuel consumption, fuel mass flow rate, effective thermal efficiency, exhaust gas temperature, and emissions of the pollutants methane (CH4) and carbon dioxide (CO2) at the exhaust outlet were determined. The exhaust gas temperatures proved to be relatively stable given the 180-second pre-heating time of the engine, increasing with the rise in load. An increase in the diesel consumption rate was noted as the power required by the electrical load generated by the resistors increased. On the other hand, the specific fuel consumption decreased, accompanied by an increase in effective thermal efficiency. Nevertheless, there was an increase in (CO2) emissions as the load increased, while the behavior of the studied unburned hydrocarbon (CH4), indicated a possible influence of local combustion conditions, which do not always occur ideally on a global scale. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso Thu, 09 Jul 2026 00:00:00 GMT http://repositorio.ufgd.edu.br/jspui/handle/prefix/6977 2026-07-09T00:00:00Z http://repositorio.ufgd.edu.br/jspui/handle/prefix/6914 Título: Análise e projeto de um sistema Ball and Beam Autor(es): Agostini, Ismael Antônio Primeiro Orientador: Conceição, Sanderson Manoel da Abstract: This work presents the development, implementation, and analysis of an experimental Ball and Beam platform, a classic control system used for the study of unstable and nonlinear systems. The central objective was to design a didactic bench capable of integrating concepts of mathematical modeling, electronic instrumentation, and digital control, resulting in a highly efficient tool for academic applications. The methodology was based on the phased development of projects, starting with me chanical design via CAD software and manufacturing by precision processes (CNC and 3D printing). In terms of hardware, the architecture was structured around the Arduino Mega 2560 microcontroller, using a VL53L1X laser sensor (ToF) for position feedback and a high-torque servomotor for actuation. The mathematical modeling of the system was deduced from Newton’s Laws, incorporating the experimental determination of the static friction coefficient and the application of second-order IIR digital filters for conditioning the reading signals. The control strategy was based on the digital PID algorithm, whose initial tuning was performed using the analytical and experimental Ziegler-Nichols method During the tests, it was identified that the marginal stabilization of the system occurred with a critical gain of 1.47 and a period of 3.5 s. Although the theoretical parameters served as a basis, fine adjustments were necessary to mitigate the effects of actuator saturation and the nonlinearities of the physical plant. The results demonstrate that the platform achieved satisfactory performance, exhibiting stability, repeatability, and precision in the positioning of the sphere. It is concluded that the developed system is an effective tool for the practical demonstration of control phenomena, successfully fulfilling the established design and performance requirements. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso Thu, 27 Nov 2025 00:00:00 GMT http://repositorio.ufgd.edu.br/jspui/handle/prefix/6914 2025-11-27T00:00:00Z http://repositorio.ufgd.edu.br/jspui/handle/prefix/6873 Título: Análise experimental do escoamento de ar na admissão de um motor diesel utilizando um tubo de pitot Autor(es): Santos, João Vitor da Silva Primeiro Orientador: Silva , Ramon Eduardo Pereira Abstract: Este trabalho apresenta uma análise experimental do escoamento de ar na admissão de um motor diesel por meio da aplicação dos conceitos da Mecânica dos Fluidos. O estudo teve como objetivo determinar parâmetros fluidodinâmicos do escoamento, como pressão, velocidade e vazão de ar, e avaliar sua variação em diferentes condições de operação. A realização deste tipo de análise é importante para a compreensão do comportamento dos fluidos em sistemas de admissão, contribuindo para a avaliação do desempenho e da eficiência de motores de combustão interna. A metodologia empregada baseou-se na obtenção de dados experimentais de pressão e temperatura, utilizados para o cálculo das variáveis de interesse e para a caracterização do escoamento. Os resultados obtidos demonstraram que o aumento da demanda operacional do sistema promove alterações significativas nas características do fluxo de ar, resultando em maiores valores de velocidade e vazão. A comparação entre os dados experimentais e os fundamentos teóricos permitiu verificar a consistência da metodologia adotada e a aplicabilidade dos conceitos estudados para a análise de escoamentos internos. Dessa forma, conclui-se que a abordagem experimental utilizada possibilitou a obtenção de resultados coerentes com o comportamento esperado do escoamento, contribuindo para a compreensão dos fenômenos fluidodinâmicos envolvidos e para a aplicação prática dos conhecimentos de Mecânica dos Fluidos em sistemas de engenharia. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso Thu, 02 Jul 2026 00:00:00 GMT http://repositorio.ufgd.edu.br/jspui/handle/prefix/6873 2026-07-02T00:00:00Z http://repositorio.ufgd.edu.br/jspui/handle/prefix/6871 Título: Análise termomecânica de um disco de freio Baja SAE utilizando o software Salome-Meca Autor(es): Campos, Thiago Andrade Primeiro Orientador: Bornschlegell , Augusto Salomão Abstract: The braking system of a Baja SAE prototype acts not only in deceleration, but also as a fundamental element of control and maneuverability in extreme off-road conditions. This work aims to evaluate the struc tural and thermal behavior of the front brake disc of a Baja vehicle, manufactured in Hardox 450 steel, ensuring the reliability of the design. For this, the sequentially coupled thermomechanical analysis methodology was employed using the open source Salome-Meca platform and the Code_Aster solver. The numerical model eval uated three critical operational scenarios based on von Mises failure theory: purely mechanical panic braking, warping due to a 0.5 mm caliper misalignment, and thermomechanical coupling. The results obtained demon strated that the component exhibits high robustness under normal operating conditions, achieving a Safety Factor of 5.69 in cold braking and 3.21 under severe thermal expansion, validating the safety of the design. However, the analysis revealed high vulnerability to misalignment, resulting in a Safety Factor of 0.73 and indicating plastic deformation. It is concluded that the design is safe and efficient for operation, provided that the assembly tolerances are maintained. Editor: Universidade Federal da Grande Dourados Tipo: Trabalho de Conclusão de Curso Mon, 29 Jun 2026 00:00:00 GMT http://repositorio.ufgd.edu.br/jspui/handle/prefix/6871 2026-06-29T00:00:00Z