Margarita Tecpoyotl-Torres | UAEM - Academia.edu (original) (raw)
Papers by Margarita Tecpoyotl-Torres
Programación matemática y software
La comunicación inalámbrica, mejor conocida como Wi-Fi (Wireless Fidelity), adquiere interés ya q... more La comunicación inalámbrica, mejor conocida como Wi-Fi (Wireless Fidelity), adquiere interés ya que no requiere del uso de cables, los cuales son engorrosos y limitan el espacio libre. Este tipo de comunicación es ampliamente utilizado en equipos electrónicos, principalmente en el hogar y la industria. Las antenas de parche, que usan algunos de estos equipos, son muy populares debido a sus características. El objetivo de este trabajo es obtener un prototipo de antena de parche eficiente y económico para su uso en interiores y exteriores. En principio, se presenta el prototipo de una antena de parche rectangular diseñada para Wi-Fi con polarización lineal. Después, se realizan sobre ella cortes y ranuras, para mejorar su ganancia. Las pruebas realizadas con la antena individual con cuatro cortes muestra la factibilidad de su uso para interiores. Posteriormente, se diseña un arreglo de antenas de parche en base a la antena individual de cuatro cortes, con la finalidad de obtener un pr...
Micromachines
Microgrippers are devices that have found applications in various fields of research and industry... more Microgrippers are devices that have found applications in various fields of research and industry. They are driven by various actuation methods. In this article, an electrothermal rotary actuator recently proposed in the literature is explored to obtain a novel microgripper design (Model 1). In addition, the use of the rotary actuator as part of the chevron actuated microgrippers (Model 2) is also discussed. The theoretical analysis of the rotary actuator is supported by an equivalent U-shaped-like microactuator. The small error values validate the approximation used. Numerical modeling is performed with ANSYSTM (Student version 2022, ANSYS, PA, USA). A comparison of theoretical and numerical results provides acceptable error values. The total inter-jaw displacement values obtained for models 1 and 2 are 12.28 μm and 21.2 μm, respectively, and the reaction force is 8.96 μN and 34.2 μN, respectively. The performance parameters of both microgrippers could make their use feasible for d...
2020 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)
This article provides an analysis of harmonics existing in the electrical installation at the pla... more This article provides an analysis of harmonics existing in the electrical installation at the plant “Chiconautla”, dependent on the General Management Department of Construction and Hydraulic Operation of Mexico State (DGCOH). For electrical power quality studies, monitoring equipment was initially installed at the Point of common coupling, to obtain the maximum average values of the total distortion harmonics of voltage and current. This monitoring is important, due to these signals must meet the standards established by regulatory organizations, to improve the energy quality, reduce costs and to avoid electric equipment’s failures. It can be determined that the main contributions to these distortions are third, fifth and seventh harmonics. The time of transfer given by the automatic transfer equipment, was measured when failures in the network occurred. It can be said that all measurement satisfies the requirements of network code. Some recommendations are given to improve the performance of the system.
DYNA ENERGIA Y SOSTENIBILIDAD, 2022
ABSTRACT: This article shows the analysis for load transfer without interruption between two 23 k... more ABSTRACT: This article shows the analysis for load transfer without interruption between two 23 kV distribution feeders. This procedure is not common in this type of system and requires paying primary attention to the characteristics of the electrical network for its application. The distribution circuits discussed here have their own power substation with different voltage levels. The information obtained from a state estimator, the contingency conditions, the electrical parameters of impedances and network configuration allow to carry out the simulation of the load transfer with the Alternative Transients Program software. From the simulation it is shown that load transfer without interruption is possible as long as certain operating conditions are met in the power and distribution networks. The dependence of the transfer on the voltage levels, angular phase shift of voltages and strength of the electrical network is shown, represented by its thevenin impedance at the interconnect...
2019 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE), 2019
This article presents the design and implementation of a microgripper device actuated by a piezoe... more This article presents the design and implementation of a microgripper device actuated by a piezoelectric stack. In order to reduce fabrication costs, conventional piezoelectric buzzers are used that are easily found in the market at very low cost. Polylactic Acid (PLA) was chosen as the structural material for the design of the mechanisms of the microgripper, the choice of this material considerably reduces the total implementation cost. The originality of this work resides in the material used and in the stacked piezoelectric actuator. The main contribution is the demonstration of a design methodology that implements prototype compliance mechanisms at millimeter scale for validation purposes before proceeding to the fabrication in micrometric scale. Even so, the system in mm scale can also be used for micromanipulation due to the range of its microgripper jaws’ aperture and its reliability. ANSYSTM was used as the software tool for simulation.
2017 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE), 2017
Positioning mechanisms are required in order to improve antenna reception through a better orient... more Positioning mechanisms are required in order to improve antenna reception through a better orientation, reducing the physical interference produced by coupling of impedance, when orientation is made by hand. In this work, a positioning support for patch antennas was designed in order to know its effect over the patch antenna's performance. It is well-known that fabrication process of the antenna produces a shift in its frequency response, but there was not found information about the effect of the structural support. Simulations to known this effect were performed considering two types of material for the structural support. A patch antenna, designed for Wi-Fi (2.4 GHz), was used to analyze this effect.
Los acelerometros capacitivos basados en sistemas electromecanicos (MEMS), son ampliamente utiliz... more Los acelerometros capacitivos basados en sistemas electromecanicos (MEMS), son ampliamente utilizados en la industria automotriz, en deteccion sismica y en aplicaciones militares. La sensibilidad es una de sus caracteristicas principales, la cual beneficia ampliamente su uso frente a pequenos cambios de aceleracion. En este trabajo, los elementos considerados en el analisis de estos sistemas son masa y brazos de suspension, los cuales constituyen un sistema masa-resorte. Su modelado matematico muestra la respuesta mecanica del sistema. Con base en las ecuaciones para calcular la respuesta del desplazamiento de la masa y de la frecuencia de operacion, se establecen los criterios para determinar la geometria de la masa y la longitud de los brazos de suspension con la finalidad de mejorar su respuesta en sensibilidad de desplazamiento. La importancia de la constante de rigidez es tambien considerada. En este caso, los cambios en la masa producen geometrias irregulares que al mismo tiem...
Journal of Atmospheric and Solar-Terrestrial Physics, 2021
Radioelectronics and Communications Systems, 2010
Micromachines
This article documents the design, manufacture, and testing of a silicon inertial optical sensor ... more This article documents the design, manufacture, and testing of a silicon inertial optical sensor for low-frequency (lower than 2 kHz) applications. Three accelerometer designs optimized by parameterization using Finite Element Analysis were considered. The accelerometers were manufactured and the one with the highest performance at low frequency was chosen for testing, which was attached to a steel package. The feasibility of using probes, based on micro-machined sensing elements, to measure mechanical vibrations with high resolution was also studied. The detection is performed with an air interferometer, eliminating the need for electric signals that are susceptible to electromagnetic interference and large temperature variations. From the fabrication technology using only a silicon wafer with both sides etched, the frequency response of the sensor, temperature operation (higher than 85 °C) and with a resolution of 17.5 nm, it was concluded that is achievable and feasible to design...
Micromachines
Based on a V-shaped microactuator with a pair of beams, modifications were made to the length and... more Based on a V-shaped microactuator with a pair of beams, modifications were made to the length and width of a microactuator to observe the effects. A theoretical approach and numerical characterization of the modified microactuator were performed. Its performance was compared to a similar microactuator with equal beam widths, and a V-shaped microactuator. The proposed microactuator, fed at 2 V, compared to the V-shaped actuator, showed a 370.48% increase in force, but a 29.8% decrease in displacement. The equivalent von Mises stress level increased (until 74.2 MPa), but was below the silicon ultimate stress. When the modified microactuator was applied to the proposed microgripper, compared to the case using a V-shaped actuator, the displacement between the jaws increased from 0.85 µm to 4.85 µm, the force from 42.11 mN to 73.61 mN, and the natural frequency from 11.36 kHz to 37.99 kHz; although the temperature increased, on average, from 42 °C up to 73 °C, it is not a critical value ...
Japanese Journal of Applied Physics, 1998
Theoretical and experimental analyze of surface-oriented silicon p-i-n structures for the control... more Theoretical and experimental analyze of surface-oriented silicon p-i-n structures for the control of high power wideband devices, are introduced. The structure here studied show good operating characteristics under the application of powerful electromagnetic waves. These surface-oriented structures are very promising for applications in the millimeter- and submillimeter-wave range.
Journal of Electromagnetic Analysis and Applications, 2017
Japanese Journal of Applied Physics, 1998
CienciaUAT
Ante la transición a universidades emprendedoras, existe la tendencia a incrementar el patentamie... more Ante la transición a universidades emprendedoras, existe la tendencia a incrementar el patentamiento, aunque sin un estudio profundo del potencial comercial, por lo que el porcentaje de los productos que lo logran es muy bajo. El objetivo de esta investigación fue diseñar una estrategia de evaluación tecnológica y comercial de patentes universitarias a partir de la identificación de oportunidades en transferencia de tecnología (TT). Para ello, se examinaron 269 solicitudes de patente de la Benemérita Universidad Autónoma de Puebla (BUAP) y de la Universidad Autónoma del Estado de Morelos (UAEM), de acuerdo con la Clasificación Internacional de Patentes (CIP), en un periodo de 10 años (2009-2018), mediante 4 pasos: (a) construcción de la base de datos con la herramienta del Instituto Mexicano de Propiedad Intelectual, (b) identificación de las capacidades inventivas, a través de la Organización Mundial de la Propiedad Intelectual, (c) distribución por industrias de intensidad y oport...
Currently, the teaching of creativity and entrepreneurship is not yet sufficiently integrated int... more Currently, the teaching of creativity and entrepreneurship is not yet sufficiently integrated into higher education of the Autonomous University of Morelos State (UAEM)´s curricula. Indeed, in Mexico, most entrepreneurship courses are offered in expensive business and economic Institutes. The diffusion of creativity and entrepreneurship is particularly weak in public universities, as, UAEM. Therefore, a block of courses, called Innovation, was implemented in the curricula of the bachelor program in Technology, which is offered at UAEM. This block is one of the differentiation elements of this program. The objective is to strengthen the development of the students including capacities related to creativity, entrepreneurship and innovation, throughout their professional training. This program is pertinent to current needs, where competitiveness, based on technological innovation, is identified as fundamental for the economic
2017 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE), 2017
In this paper, the dynamic and electric analysis of a novel electrostatically actuated microdevic... more In this paper, the dynamic and electric analysis of a novel electrostatically actuated microdevice is presented. This device consist of an arrangement of four parallel microcantilevers, which is fed with 1 V. The analysis was carried out by Finite Element Method (FEM) in Ansys Workbench in order to obtain: current intensity, temperature distribution, Joule effect, structural deformation, natural frequency, and reaction force, which characterize the microgripper performance. The material used in the analysis was Silicon. A thermoelastic model, that describes the behavior mechanical of the device, is developed. The device had an initial gap of 28 µm and a final gap of ~ 4 µm, the force of subjection in grippers is 0.4 µN.
Programación matemática y software
La comunicación inalámbrica, mejor conocida como Wi-Fi (Wireless Fidelity), adquiere interés ya q... more La comunicación inalámbrica, mejor conocida como Wi-Fi (Wireless Fidelity), adquiere interés ya que no requiere del uso de cables, los cuales son engorrosos y limitan el espacio libre. Este tipo de comunicación es ampliamente utilizado en equipos electrónicos, principalmente en el hogar y la industria. Las antenas de parche, que usan algunos de estos equipos, son muy populares debido a sus características. El objetivo de este trabajo es obtener un prototipo de antena de parche eficiente y económico para su uso en interiores y exteriores. En principio, se presenta el prototipo de una antena de parche rectangular diseñada para Wi-Fi con polarización lineal. Después, se realizan sobre ella cortes y ranuras, para mejorar su ganancia. Las pruebas realizadas con la antena individual con cuatro cortes muestra la factibilidad de su uso para interiores. Posteriormente, se diseña un arreglo de antenas de parche en base a la antena individual de cuatro cortes, con la finalidad de obtener un pr...
Micromachines
Microgrippers are devices that have found applications in various fields of research and industry... more Microgrippers are devices that have found applications in various fields of research and industry. They are driven by various actuation methods. In this article, an electrothermal rotary actuator recently proposed in the literature is explored to obtain a novel microgripper design (Model 1). In addition, the use of the rotary actuator as part of the chevron actuated microgrippers (Model 2) is also discussed. The theoretical analysis of the rotary actuator is supported by an equivalent U-shaped-like microactuator. The small error values validate the approximation used. Numerical modeling is performed with ANSYSTM (Student version 2022, ANSYS, PA, USA). A comparison of theoretical and numerical results provides acceptable error values. The total inter-jaw displacement values obtained for models 1 and 2 are 12.28 μm and 21.2 μm, respectively, and the reaction force is 8.96 μN and 34.2 μN, respectively. The performance parameters of both microgrippers could make their use feasible for d...
2020 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE)
This article provides an analysis of harmonics existing in the electrical installation at the pla... more This article provides an analysis of harmonics existing in the electrical installation at the plant “Chiconautla”, dependent on the General Management Department of Construction and Hydraulic Operation of Mexico State (DGCOH). For electrical power quality studies, monitoring equipment was initially installed at the Point of common coupling, to obtain the maximum average values of the total distortion harmonics of voltage and current. This monitoring is important, due to these signals must meet the standards established by regulatory organizations, to improve the energy quality, reduce costs and to avoid electric equipment’s failures. It can be determined that the main contributions to these distortions are third, fifth and seventh harmonics. The time of transfer given by the automatic transfer equipment, was measured when failures in the network occurred. It can be said that all measurement satisfies the requirements of network code. Some recommendations are given to improve the performance of the system.
DYNA ENERGIA Y SOSTENIBILIDAD, 2022
ABSTRACT: This article shows the analysis for load transfer without interruption between two 23 k... more ABSTRACT: This article shows the analysis for load transfer without interruption between two 23 kV distribution feeders. This procedure is not common in this type of system and requires paying primary attention to the characteristics of the electrical network for its application. The distribution circuits discussed here have their own power substation with different voltage levels. The information obtained from a state estimator, the contingency conditions, the electrical parameters of impedances and network configuration allow to carry out the simulation of the load transfer with the Alternative Transients Program software. From the simulation it is shown that load transfer without interruption is possible as long as certain operating conditions are met in the power and distribution networks. The dependence of the transfer on the voltage levels, angular phase shift of voltages and strength of the electrical network is shown, represented by its thevenin impedance at the interconnect...
2019 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE), 2019
This article presents the design and implementation of a microgripper device actuated by a piezoe... more This article presents the design and implementation of a microgripper device actuated by a piezoelectric stack. In order to reduce fabrication costs, conventional piezoelectric buzzers are used that are easily found in the market at very low cost. Polylactic Acid (PLA) was chosen as the structural material for the design of the mechanisms of the microgripper, the choice of this material considerably reduces the total implementation cost. The originality of this work resides in the material used and in the stacked piezoelectric actuator. The main contribution is the demonstration of a design methodology that implements prototype compliance mechanisms at millimeter scale for validation purposes before proceeding to the fabrication in micrometric scale. Even so, the system in mm scale can also be used for micromanipulation due to the range of its microgripper jaws’ aperture and its reliability. ANSYSTM was used as the software tool for simulation.
2017 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE), 2017
Positioning mechanisms are required in order to improve antenna reception through a better orient... more Positioning mechanisms are required in order to improve antenna reception through a better orientation, reducing the physical interference produced by coupling of impedance, when orientation is made by hand. In this work, a positioning support for patch antennas was designed in order to know its effect over the patch antenna's performance. It is well-known that fabrication process of the antenna produces a shift in its frequency response, but there was not found information about the effect of the structural support. Simulations to known this effect were performed considering two types of material for the structural support. A patch antenna, designed for Wi-Fi (2.4 GHz), was used to analyze this effect.
Los acelerometros capacitivos basados en sistemas electromecanicos (MEMS), son ampliamente utiliz... more Los acelerometros capacitivos basados en sistemas electromecanicos (MEMS), son ampliamente utilizados en la industria automotriz, en deteccion sismica y en aplicaciones militares. La sensibilidad es una de sus caracteristicas principales, la cual beneficia ampliamente su uso frente a pequenos cambios de aceleracion. En este trabajo, los elementos considerados en el analisis de estos sistemas son masa y brazos de suspension, los cuales constituyen un sistema masa-resorte. Su modelado matematico muestra la respuesta mecanica del sistema. Con base en las ecuaciones para calcular la respuesta del desplazamiento de la masa y de la frecuencia de operacion, se establecen los criterios para determinar la geometria de la masa y la longitud de los brazos de suspension con la finalidad de mejorar su respuesta en sensibilidad de desplazamiento. La importancia de la constante de rigidez es tambien considerada. En este caso, los cambios en la masa producen geometrias irregulares que al mismo tiem...
Journal of Atmospheric and Solar-Terrestrial Physics, 2021
Radioelectronics and Communications Systems, 2010
Micromachines
This article documents the design, manufacture, and testing of a silicon inertial optical sensor ... more This article documents the design, manufacture, and testing of a silicon inertial optical sensor for low-frequency (lower than 2 kHz) applications. Three accelerometer designs optimized by parameterization using Finite Element Analysis were considered. The accelerometers were manufactured and the one with the highest performance at low frequency was chosen for testing, which was attached to a steel package. The feasibility of using probes, based on micro-machined sensing elements, to measure mechanical vibrations with high resolution was also studied. The detection is performed with an air interferometer, eliminating the need for electric signals that are susceptible to electromagnetic interference and large temperature variations. From the fabrication technology using only a silicon wafer with both sides etched, the frequency response of the sensor, temperature operation (higher than 85 °C) and with a resolution of 17.5 nm, it was concluded that is achievable and feasible to design...
Micromachines
Based on a V-shaped microactuator with a pair of beams, modifications were made to the length and... more Based on a V-shaped microactuator with a pair of beams, modifications were made to the length and width of a microactuator to observe the effects. A theoretical approach and numerical characterization of the modified microactuator were performed. Its performance was compared to a similar microactuator with equal beam widths, and a V-shaped microactuator. The proposed microactuator, fed at 2 V, compared to the V-shaped actuator, showed a 370.48% increase in force, but a 29.8% decrease in displacement. The equivalent von Mises stress level increased (until 74.2 MPa), but was below the silicon ultimate stress. When the modified microactuator was applied to the proposed microgripper, compared to the case using a V-shaped actuator, the displacement between the jaws increased from 0.85 µm to 4.85 µm, the force from 42.11 mN to 73.61 mN, and the natural frequency from 11.36 kHz to 37.99 kHz; although the temperature increased, on average, from 42 °C up to 73 °C, it is not a critical value ...
Japanese Journal of Applied Physics, 1998
Theoretical and experimental analyze of surface-oriented silicon p-i-n structures for the control... more Theoretical and experimental analyze of surface-oriented silicon p-i-n structures for the control of high power wideband devices, are introduced. The structure here studied show good operating characteristics under the application of powerful electromagnetic waves. These surface-oriented structures are very promising for applications in the millimeter- and submillimeter-wave range.
Journal of Electromagnetic Analysis and Applications, 2017
Japanese Journal of Applied Physics, 1998
CienciaUAT
Ante la transición a universidades emprendedoras, existe la tendencia a incrementar el patentamie... more Ante la transición a universidades emprendedoras, existe la tendencia a incrementar el patentamiento, aunque sin un estudio profundo del potencial comercial, por lo que el porcentaje de los productos que lo logran es muy bajo. El objetivo de esta investigación fue diseñar una estrategia de evaluación tecnológica y comercial de patentes universitarias a partir de la identificación de oportunidades en transferencia de tecnología (TT). Para ello, se examinaron 269 solicitudes de patente de la Benemérita Universidad Autónoma de Puebla (BUAP) y de la Universidad Autónoma del Estado de Morelos (UAEM), de acuerdo con la Clasificación Internacional de Patentes (CIP), en un periodo de 10 años (2009-2018), mediante 4 pasos: (a) construcción de la base de datos con la herramienta del Instituto Mexicano de Propiedad Intelectual, (b) identificación de las capacidades inventivas, a través de la Organización Mundial de la Propiedad Intelectual, (c) distribución por industrias de intensidad y oport...
Currently, the teaching of creativity and entrepreneurship is not yet sufficiently integrated int... more Currently, the teaching of creativity and entrepreneurship is not yet sufficiently integrated into higher education of the Autonomous University of Morelos State (UAEM)´s curricula. Indeed, in Mexico, most entrepreneurship courses are offered in expensive business and economic Institutes. The diffusion of creativity and entrepreneurship is particularly weak in public universities, as, UAEM. Therefore, a block of courses, called Innovation, was implemented in the curricula of the bachelor program in Technology, which is offered at UAEM. This block is one of the differentiation elements of this program. The objective is to strengthen the development of the students including capacities related to creativity, entrepreneurship and innovation, throughout their professional training. This program is pertinent to current needs, where competitiveness, based on technological innovation, is identified as fundamental for the economic
2017 International Conference on Mechatronics, Electronics and Automotive Engineering (ICMEAE), 2017
In this paper, the dynamic and electric analysis of a novel electrostatically actuated microdevic... more In this paper, the dynamic and electric analysis of a novel electrostatically actuated microdevice is presented. This device consist of an arrangement of four parallel microcantilevers, which is fed with 1 V. The analysis was carried out by Finite Element Method (FEM) in Ansys Workbench in order to obtain: current intensity, temperature distribution, Joule effect, structural deformation, natural frequency, and reaction force, which characterize the microgripper performance. The material used in the analysis was Silicon. A thermoelastic model, that describes the behavior mechanical of the device, is developed. The device had an initial gap of 28 µm and a final gap of ~ 4 µm, the force of subjection in grippers is 0.4 µN.