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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- Feedback scheme based on fuzzy control at nanometer scale(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2010-05-01) Escamilla Colli, Diego Vidal; Vidal Escamilla Collí, Diego; 336082; Siller Carrillo, Héctor Rafael; Cortés Martínez, Rodolfo; Guedea Elizalde, Federico; Palomera Palacios, Francisco; Coello Cárdenas, Víctor; Tecnológico de Monterrey, Campus MonterreyFuzzy control is a practical alternative for a variety of challenging control applications, since it provides a convenient method for constructing nonlinear controllers via the use of heuristicinformation. In this work, it is proposed a control system based on fuzzy logicto control the tip-sample distance in a scanning near field optical microscope (SNOM) using fuzzy control. The fuzzy controller design assumes only one input signal defined as the difference of the sampled signal (tuning fork-tip) and the reference signal, which are compared through designedsoftware. This signal is used as the rule-base of the fuzzy logic controller. It wasusedLabView 8.2 to develop the set of rules on how to control the process. A basic data acquisition is used as interface to manipulate the fuzzy controller as feedback scheme in the positioning system (piezoelectric bimorph) for the shear force control. The approach curve of the shear-force measurement of the piezoelectric bimorph was obtained using this scheme. In conclusion, this approach can be viewed as simple and reliable as feedback scheme based on fuzzy control for shear force control in a SNOM. However, in many cases, the fuzzy control can be used to improve existing traditional controller systems by adding an extra layer of intelligence to the current control method.
- Evaluation of micro-mechanical manufacturing processes for micro-fluidic devices(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2008-12-01) Jáuregui Santiago, Ana Laura; Siller Carrillo, Héctor Rafael; Rodríguez González, Ciro Ángel; Acevedo Mascarua, Joaquin; Elías Zúñiga, Alex; Tecnológico de Monterrey, Campus Monterrey; Programa de Graduados en Ingeniería; División de Ingeniería y Arquitectura; Campus MonterreyThe aim of this thesis is focused on the evaluation of different micro-mechanical technologies such as: Wire Electro-Discharge Machining/Sandblasting, Abrasive Water Jet and Micro-End Milling, for the fabrication of micro-fluidic devices, whose main components are miniaturized geometries known as micro-channels. In addition, Lithography even is not considered as a mechanical process is also evaluated against the other processes because is commonly used for the fabrication of small features. The micro-fluidic devices find their field of application in areas such as Medicine or Biotechnology, in which they are useful for dosifying drugs to the human body, analyze DNA or for cultivating cells. The materials that are used for the prototyping in each technology are: PDMS (Polydimethylsiloxane) for Lithography, cooper for H/ED/W/sandblasting, aluminum for Abrasive Water Jet and acrylic for Micro-End Milling. The evaluation consists in a comprehensive study of surface quality and topography, made with the help of advanced contact and non-contact devices over each prototype manufactured. Also economical considerations have been taken into account in order to choose the most appropriate manufacturing process for the prototyping of micro-fluidic devices.