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Rivas-Cambero I.,Tulancingo Polytechnic University | Sausedo-Solorio J.M.,Autonomous University of the State of Hidalgo
Meccanica | Year: 2012

We propose a general model for pendular systems with an arbitrary number of links arranged sequentially. The form of this model is easily adaptable to different settings and operating conditions. The main subject of analysis is a system obtained as a specific case taken from the general analysis, a three-links pendulum with damping subject to periodic perturbation. We performed a theoretical analysis of the frequency response and compared it with results from temporal integration. Moreover, a law was obtained explaining the behavior of the shift of the resonant frequencies due to a change in a parameter. © Springer Science+Business Media B.V. 2011.

Ramirez J.M.,CINVESTAV | Gonzalez J.M.,Technological University of Mexico | Ruben T.O.,Tulancingo Polytechnic University
International Journal of Electrical Power and Energy Systems | Year: 2011

With the advent of new technology based on power electronics, power systems may attain better voltage profile. This implies the proposition of careful strategies to dispatch reactive power in order to take advantage of all reactive sources, depending on size, location, and availability. This paper proposes an optimal reactive power dispatch strategy taking care of the steady state voltage stability implications. Two power systems of the open publications are studied. Power flow analysis has been carried out, which are the initial conditions for Transient Stability (TS), Small Disturbance (SD), and Continuation Power Flow (CPF) studies. Steady state voltage stability analysis is used to verify the impact of the optimization strategy. To demonstrate the proposal, PV curves, eigenvalue analyses, and time domain simulations, are utilized. © 2010 Elsevier Inc. All rights reserved.

Zaca-Moran P.,Autonomous University of Puebla | Ramos-Garcia R.,National Institute of Astrophysics, Optics and Electronics | Ortega-Mendoza J.G.,Tulancingo Polytechnic University | Chavez F.,Autonomous University of Puebla | And 2 more authors.
Optics Express | Year: 2015

In this work, the simultaneous presence of saturable (SA) and two-photon absorption (TPA) in zinc nanoparticles (ZnNPs) photodeposited onto the core of an optical fiber was studied in the nanosecond regime with the P-scan method using a high gain pulsed erbium-doped fiber amplifier. An analysis based on Mie theory was carried out to demonstrate the influence of the absorption coefficient with the particles sizes in the proximity of surface plasmon resonance (SPR). The shift from TPA to SA has been observed as the irradiance is increased. It was found that for irradiances lower than 5 MW/cm2, TPA is dominant, whereas for irradiances higher than 5 MW/cm2, the SA becomes dominant. Furthermore, the values of the nonlinear absorption coefficient and the imaginary part of third-order nonlinear optical susceptibility were calculated numerically from the transmittance measured. Such TPA makes ZnNPs a candidate for optical limiting applications, and SA makes them a candidate for applications in pulsed fiber laser systems. ©2015 Optical Society of America.

Hernandez-Martinez E.G.,Tecnologico de Estudios Superiores | Albino J.M.F.,Tulancingo Polytechnic University
Proceedings of the IEEE International Conference on Control Applications | Year: 2011

The main goal of formation control strategies is to coordinate a robot team to achieve a desired formation pattern. Some applications of formation control, for instance sensing coverage, searching and rescue, transportation of large objects, etc. require to establish the desired positions of the robots according to an strategic and equidistant spatial coverage within the work area or boundary. This paper presents a hybrid architecture where a SOM neural network establishes the strategic positions of a 2D area or perimeter using the formation graph of robots. This information is transmitted online to a low-level control strategy based on artificial potential functions which ensures the convergence to the desired formation and collision avoidance based on decentralized repulsive vector fields instead the common repulsive potential functions. Some numerical simulations with virtual reality show the performance of the control architecture. © 2011 IEEE.

Garcia Carrillo L.R.,Tulancingo Polytechnic University | Tapia Olvera R.,University of Nevada, Reno
IEEE Latin America Transactions | Year: 2015

This paper presents a practical design of a visual servoing algorithm for mobile robots. The algorithm, implemented in mobile robots equipped with a camera, facilitates to detect and follow a specific object autonomously. The proposed scheme infers information directly from the images obtained by the camera, and then digital signal processing techniques are implemented in order to detect the object of interest and to generate the necessary movements of the robot in order to perform the tracking task. The algorithm provides effective performance when using images of objects that have well known characteristics, e.g., color and the size. Experimental results obtained with omnidirectional mobile robot performing indoors show that the proposed methodology allows locating and following a specific object by using the proposed image-based visual servoing control. © 2003-2012 IEEE.

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