Ciencias Exactas y Ciencias de la Salud
Permanent URI for this collectionhttps://hdl.handle.net/11285/551039
Pertenecen a esta colección Tesis y Trabajos de grado de las Maestrías correspondientes a las Escuelas de Ingeniería y Ciencias así como a Medicina y Ciencias de la Salud.
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- Noise-vibration-harshness analysis for electric machines(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2024-05) Luzardo Prince, Esteban José; Galluzzi Aguilera, Renato; mtyahinojosa, emimmayorquin; Juárez Esquinca, José Javier; School of Engineering and Sciences; Campus Monterrey; Escobar Valderrama, GerardoIn the current societal landscape, there is a notable inclination towards the acceptance and adoption of electric vehicles, prompting heightened attention from academia and literature towards research and technological advancements in all aspects of electric vehicle design. As the most crucial component of an electric vehicle, the motor holds particular significance. Thus, this thesis centers on the analysis and examination of an electric motor for a small-scale transportation vehicle. The primary aim is to investigate the causes of noise and vibrations in electric motors, alongside conducting an analysis of Sound Pressure Level and order tracking to assess the motor's acoustic performance. Subsequently, employing the techniques outlined in this study, the objective is to propose a motor design that maintains motor performance while reducing noise and vibration production. This redesign of the base motor will entail the application of advanced motor design techniques, specifically focusing on the geometric design of internal motor components.
- Review and optimization of the operation of potable water supply sources: case of the Metropolitan Area of Monterrey(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2023-11) Rico Moreno, Jose Francisco; Ramirez Orozco. Aldo Ivan; emimmayorquin; Aguilar Barajas, Ismael; Mahlknecht, Jurgen; Barrios Piña, Héctor Alfonso; School of Engineering and Sciences; Campus MonterreyA simulation-optimization model was developed in R to simulate the hydrological cycle of the dams that are the main sources of surface water. This was complemented by forecast information of climatological variables and the demand of the Metropolitan Area of Monterrey (MAM). The model simulated scenarios that were based on the extraction infrastructure and sustainable operation of the sources, using the Particle Swarm Optimization algorithm to minimize an objective function that aimed to lower the extraction operation costs and ensure continuous water supply. To simulate precipitation and runoff from the contribution basins, historical data on the dam regime of the studied vessels and the demand for the last ten years of the AMM were used. These data were provided by the operating agency Servicios de Agua y Drenaje de Monterrey (SADM), while climatological data were collected from open information by the National Water Commission (CONAGUA). Databases were created using stochastic models such as seasonal autoregressive integrated mobile media (SARIMA) and neural autoregressive networks (NNAR). These databases contain monthly historical information on the dam regime (direct precipitation, evaporation, and extractions), monthly precipitation of the selected climatological stations, and the water demand of the MAM. Based on the simulation results, it was concluded that maintaining the water consumption trend of the last 10 years is not feasible. The demand exceeds the annual concessions identified, and all sources remain under high operational stress. However, the scenario of increased extraction capacity for one of the surface sources is ideal for maintaining continuous supply, respecting current annual water allocations, and the sustainability of the aquifers. All scenarios indicate that unless better and incremental extraction infrastructure is developed, demand will not be met unless aquifers are overexploited beyond their natural recharge.
- Improving the path planning and the printing time for an optimized infill of 3D objects by reducing sharp angles and having a continuous path(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2021-06-14) Betancourt Adame, Cesar David; NOGUEZ MONROY, JUANA JULIETA; 202512; Noguez Monroy, Juana Julieta; emipsanchez; Ruiz Loza, Sergio; Benes, Bedrich; Escuela de Ingeniería y Ciencias; Campus Ciudad de MéxicoPurpose – Three-dimensional printing is a technology that can provide one of the most efficient methods for product design, prototyping, and production being positively cost-effective due to the efficiency of the design, the customization of the objects, and the variety of materials. However, contemporary computer-aided design (CAD) and computer-aided manufacturing (CAM) systems use different infill patterns that have the same similarity, they usually contain sharp angles and non-continuous trajectories. A new algorithm is used to create an infill that minimizes the sharp angles in the infills and having a continuous path in order to generate the necessary tool-path information. In this thesis, we propose a new algorithm to create a new type of infill that reduces the amount of time and material used in each layer of an object printed with the Fused Deposition Modeling (FDM) technology. Design/methodology/approach – In the proposed algorithm, a grid is generated in a layer with the specific shape that corresponds to a 3D object, it consists of a percentage according to the one is chosen by the user, being 20% the most used in this technology. The infill is created with a continuous path and minimizing the sharp angles in the whole layer, the optimization is accomplished by using simulated annealing. Findings – By creating and running different experiments in various models of FDM 3D printers, we proved the base of our algorithm, that by having sharp angles in the infill, the total printing time is increased due to the positive and negative acceleration of the printing head, altogether with the non-continuous path that increases the time when stopping extruding material and staring again. Applying the proposed algorithm, this information can be used to create a new path for an infill giving as result the reduction of time and material in each layer of a 3D printed object. Research limitations/implications – The proposed methodology can be applied to create a new infill for objects that will be printed with the FDM technology. However, the algorithm works for optimizing one layer at a time. In the future, we would like to investigate the results between fill patterns of consecutive layers, where consecutive layers can’t be identical to provide good resiliency to the object. Originality/value – The proposed algorithm is a novel development for creating a new type of infill that reduces the amount of time and material employed in the fabrication of 3D objects using the Fused Deposition Modeling (FDM) technology.
- Automatic placement of electronic components to maximize heat dissipation on PCB's using particle swarm optimization(2017-12) Ramirez Velazco, Omar Alexander; Conant Pablos, Santiago Enrique; Ortiz Bayliss, José Carlos; Amaya Contreras, Iván MauricioThis thesis documents my personal research as candidate for the academic degree of Master of Science in Intelligent Systems. The purpose of this work is to optimize the electronic components layout in a printed circuit board based on metrics related to its thermal dissipation. The continuous evolution of smaller, more complex and compact integrated circuits pushes the design and fabrication techniques of printed circuit board, also known as PCB, to new limits. Moore’s Law states: “The number of transistors incorporated in a chip will approximately double every 24 months.” Nowadays, it is possible to see several examples of this in the new microprocessors used in computers, smart phones and tablets that have more than 600 million transistors (e.g. Apple A10, Intel Core i9, Qualcomm Snapdragon). A direct result of this is reflected in a significant and dramatic complexity of packages and interconnection traces contained in a single integrated circuit. Integrated circuits are increasingly dense and perform a large number of operations, requiring more current consumption and generating a rise in the circuit temperature that needs to be dissipated through the environment. The optimal placement of electronic components over a PCB can ameliorate the problem, but requires meeting multiple design objectives mostly due to the dierent power dissipation of the components, their operating temperatures, kind of materials, terminals and dimensions. It is important to notice that to approach the complexity of this type of problems, heuristics methods such as the proposed in this work, are required. Although many global companies focus in the design of electronics devices and invest in computer aided design software, specifically in Electronic Design Automation platforms known as EDA, to expedite prototype development, just a few of them have the necessary computational tools that can automatically meet all the components placement constraints. Particle Swarm Optimization (PSO) is used to address the problem through a weighted sum method for multi-objective optimization (MOO). Regardless of the deficiencies with respect to depicting the Pareto optimal set, the weighted sum method continues to be used extensively not only to provide multiple solution points by varying the weights consistently, but also to provide a single solution point that reflects preferences presumably incorporated in the selection of a single set of weights. Experiments performed were based on three main categories. Broadly speaking, the first one consisted on identifying the most important properties of PSO algorithm, its response and behavior under a dierent set of scenarios. The second kind of experiments aimed to observe and analyze which variables had more impact, and how these dominate over the rest. Lastly, the third kind cared to analyze the response of the algorithm under more complex instances of a problem. Results produced by the PSO algorithm were compared against a finite element analysis software, and finally, a general discussion was elaborated, where validity was given to the hypothesis proposed in this paper when analyzing the performance shown