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Betancourt-Riera R.,Technological Institute of Hermosillo | Ferrer-Moreno L.A.,Technological Institute of Hermosillo | Jalil J.M.N.,Monterrey Institute of Technology
Superlattices and Microstructures | Year: 2017

In this work we determine and show the expressions of the electron states of a step-quantum well with the presence of an external electric field, developed in a GaAs/AlGaAs matrix. The electron states are obtained using the envelope function approximation. In this work it is only necessary to consider a single conduction band, which due to the confinement is divided into a subband system, with T=0K. Expressions for the electron states and the differential cross-section for an intraband electron Raman scattering process of are presented, the net Raman gain is also calculated. In addition, the interpretation of the singularities found in the emission or excitation spectra is given, since several dispersion configurations are discussed. Furthermore, the effects of an electric field on the electron states and on the differential cross section are studied. © 2017 Elsevier Ltd


Verastegui-Galvan J.,Autonomous University of Queretaro | Orrante-Sakanassi J.,Technological Institute of Hermosillo
International Journal of Control | Year: 2017

This paper is concerned with position regulation in one-degree-of-freedom Euler–Lagrange Systems. We consider that the mechanical subsystem is actuated by a permanent magnet synchronous motor (PMSM). Our proposal consists of a Proportional-Integral-Derivative (PID) controller for the mechanical subsystem and a slight variation of field oriented control for the PMSM. We take into account the motor electric dynamics during the stability analysis. We present, for the first time, a global asymptotic stability proof for such a control scheme without requiring the mechanical subsystem to naturally possess viscous friction. Finally, as a corollary of our main result we prove global asymptotic stability for output feedback PID regulation of one-degree-of-freedom Euler–Lagrange systems when generated torque is considered as the system input, i.e. when the electric dynamics of PMSM's is not taken into account. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Chitraganti S.,University of Lorraine | Aberkane S.,University of Lorraine | Aubrun C.,University of Lorraine | Valencia-Palomo G.,Technological Institute of Hermosillo | Dragan V.,Institute of Mathematics Simon Stoilow
Systems and Control Letters | Year: 2014

In this article, we consider a receding horizon control of discrete-time state-dependent jump linear systems, a particular kind of stochastic switching systems, subject to possibly unbounded random disturbances and probabilistic state constraints. Due to the nature of the dynamical system and the constraints, we consider a one-step receding horizon. Using inverse cumulative distribution function, we convert the probabilistic state constraints to deterministic constraints, and obtain a tractable deterministic receding horizon control problem. We consider the receding horizon control law to have a linear state-feedback and an admissible offset term. We ensure mean square boundedness of the state variable via solving linear matrix inequalities off-line, and solve the receding horizon control problem on-line with control offset terms. We illustrate the overall approach applied on a macroeconomic system. © 2014 Elsevier B.V. All rights reserved.


Valencia-Palomo G.,Technological Institute of Hermosillo | Rossiter J.A.,University of Sheffield | Jones C.N.,Automatic Control Laboratory | Gondhalekar R.,Osaka University | Khan B.,University of Sheffield
Proceedings of the American Control Conference | Year: 2011

This paper looks at the efficiency of the parameterisation of the degrees of freedom within an optimal predictive control algorithm. It is shown that the conventional approach of directly determining each individual future control move is not efficient in general, and can give poor feasibility when the number of degrees of freedom are limited. Two systematic alternatives are explored and both shown to be far more efficient in general. © 2011 AACC American Automatic Control Council.


Valencia-Palomo G.,Technological Institute of Hermosillo | Rossiter J.A.,University of Sheffield
Control Engineering Practice | Year: 2011

The prime aim of this paper is to embed a predictive control (MPC) algorithm with constraint handling capabilities into a programmable logic controller (PLC). In order to achieve it, this paper develops parametric approaches to MPC but differs from more conventional approaches in that it predefines the complexity of the solution rather than the allowable suboptimality. The paper proposes a novel parameterisation of the parametric regions which allows efficiency of definition, effective spanning of the feasible region and also highly efficient search algorithms. Despite the suboptimality, the algorithm retains guaranteed stability, in the nominal case. A laboratory test was carried out to demonstrate the code on real hardware and the effectiveness of the solution. © 2011 Elsevier Ltd.


Gutierrez-Urquidez R.C.,Technological Institute of Hermosillo | Valencia-Palomo G.,Technological Institute of Hermosillo | Rodriguez-Elias O.M.,Technological Institute of Hermosillo | Trujillo L.,Tijuana Institute of Technology
Applied Soft Computing Journal | Year: 2015

Abstract In the design of predictive controllers (MPC), parameterisation of degrees of freedom by Laguerre functions, has shown to improve the controller performance and feasible region. However, an open question remains: how to select the optimal tuning parameters? Moreover, optimality will depend on the size of the feasible region of the controller, the system's closed-loop performance and the online computational cost of the algorithm. This paper develops a method for a systematic selection of tuning parameters for a parameterised predictive control algorithm. In order to do this, a multiobjective problem is posed and then solved using a multiobjective evolutionary algorithm (MOEA) given that the objectives are in conflict. Numerical simulations show that the MOEA is a useful tool to obtain a suitable balance between feasibility, performance and computational cost. © 2015 Elsevier B.V. All rights reserved.


Valencia-Palomo G.,Technological Institute of Hermosillo | Rossiter J.A.,University of Sheffield
IET Control Theory and Applications | Year: 2012

This study presents a novel programmable logic controller (PLC) implementation of a constrained predictive control (MPC) algorithm based on Laguerre functions and multi-parametric quadratic programming (mp-QP). First, the study shows how Laguerre functions can be used in conjunction with mp-QP to achieve a large decrease in both the online computations and data storage requirements while increasing the feasible region of the optimisation problem for MPC; extensive simulation results are given to back this claim. Next, the study shows how the algorithm can be embedded on an industrial PLC using the IEC 61131-3 programming standard. A laboratory test was carried out to demonstrate the code on real hardware. © 2012 The Institution of Engineering and Technology.


Lucero-Duarte K.,Technological Institute of Hermosillo | De La Vega-Bustillos E.,Technological Institute of Hermosillo | Lopez-Millan F.,Technological Institute of Hermosillo
Work | Year: 2012

Due to the lack of anthropometric information in northwest Mexico, we did an anthropometric study that represents the population physical characteristics and that is reliable for the design or redesign of workstations. The study was divided in two phases. The first one was the anthropometric study of 2900 automotive industry workers in northwest of Mexico. The study includes 40 body dimensions of 2345 males and 555 females personalized to be used in future researches. Second phase includes compared anthropometric characteristics of population reported in four Mexican studies and a Colombian study against the current study. Benefits of this project are: a reliable database of anthropometric characteristic of automotive industry population for workstations design or redesign that match with the users, increase product quality and reduce economic, medical and union complains. © 2012 - IOS Press and the authors. All rights reserved.


Betancourt-Riera R.,Technological Institute of Hermosillo | Betancourt-Riera R.,University of Sonora | Riera R.,University of Sonora | Rosas R.,University of Sonora
Physica E: Low-Dimensional Systems and Nanostructures | Year: 2012

The differential cross-section for an electron Raman scattering process in a semiconductor multiple GaAs/AlGaAs quantum well with the presence of an external uniform electric field is calculated for T=0 K. We assume single parabolic conduction band with one electron. The emission spectra and the effect for different electric field values are discussed. Singularities in the spectra are found and interpreted. The ERS studied here can be used to provide direct information about the electron band structure of these systems. © 2012 Elsevier B.V.


Betancourt-Riera R.,Technological Institute of Hermosillo | Betancourt-Riera R.,University of Sonora | Nieto Jalil J.M.,Monterrey Institute of Technology | Riera R.,University of Sonora
Physica B: Condensed Matter | Year: 2013

We have developed a theory of one phonon resonant Raman scattering in a semiconductor quantum wire of cylindrical geometry in the presence of an external magnetic field distribution, parallel to the cylinder axis. The effect of the magnetic field in the electron and hole states, and in the Raman scattering efficiency, is determinate. We consider the electron-phonon interaction using a Fröhlich-type Hamiltonian, deduced for the case of complete confinement phonon modes by Comas and his collaborators. We also assume T=0 K, a single parabolic conduction and valence bands. The spectra are discussed for different magnetic field values and the selection rules for the processes are also studied. © 2012 Elsevier B.V.

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