Carlos Olalla

Ph.D in Advanced Automatics and Robotics, Universitat Politècnica de Catalunya, Spain
Master's degree in Automatic and Industrial Electronics Engineering, Universitat Rovira i Virgili, Spain

Last Update: April 15, 2012

How to reach me

Current position: Research Associate at CoPEC group, ECEE Dept, University of Colorado (Boulder, CO, USA).

Email: com dot ea at tinet dot org

Boulder:
Tel: (+1) 303 492-7327
The Colorado Power Electronics Center
Dept. of Electrical, Computer, and Energy Engineering
University of Colorado at Boulder
Boulder, CO 80309 - 0425, USA

Tarragona:
Tel: (+34) 977256573
Office: Campus Sescelades, Tests Building (Plantes Pilot), Lab. 5
Universitat Rovira i Virgili, Tarragona, Spain.

Previous Positions

March 2010 - September 2010: Research Associate at GAEI group, DEEEA, Universitat Rovira i Virgili (Spain).
September 2009 - February 2010: Research Associate at MAC group at LAAS-CNRS (France).
January 2009 - July 2009: Research Assistant, Ph.D. Student at MAC group at LAAS-CNRS (France).
March 2007 - September 2007: Research Assistant, Ph.D. Student at MAC group at LAAS-CNRS (France).
August 2005 - August 2009: Research Assistant, Ph.D Student at GAEI group, DEEEA, Universitat Rovira i Virgili (Spain).

Journal Papers

C. Olalla, I. Queinnec, R. Leyva, D. Maksimovic, "Robust Gain-Scheduled Control of Switched-Mode DC-DC Converters," IEEE Transactions on Power Electronics, Volume 27, Issue 6, pp. 3006 - 3019, 2012.
C. Olalla, C. Carrejo, R. Leyva, C. Alonso, B. Estibals"Digital QFT Robust Control of DC-DC Current-Mode Converters," Electrical Engineering, 2012 (in press).
R. Leyva, C. Olalla, H. Zazo, C. Cabal, A. Cid Pastor, I. Queinnec, C. Alonso, "MPPT based on Sinusoidal Extremum-Seeking Control in PV Generation," International Journal of Photoenergy, Volume 2012 (2012), Article ID 672765, 7 pages.
C. Olalla, I. Queinnec, R. Leyva, A. El Aroudi, "Optimal State-Feedback Control of Bilinear DC-DC Converters with Guaranteed Regions of Stability," IEEE Transactions on Industrial Electronics, vol.59, no.10, pp.3868-3880, Oct. 2012.
C. Olalla, I. Queinnec, R. Leyva, A. El Aroudi, "Robust Optimal Control of Bilinear DC-DC Converters", Control Engineering Practice, vol. 19, Issue 7, pp. 688-699, 2011.
R. Leyva, C. Olalla, I. Queinnec, S. Tarbouriech, C. Alonso, L. Martinez-Salamero, "Passivity-based Control for Large-signal Stability of High-order Switching Converters", Asian Journal of Control, Volume 14, Issue 2, pages 335–347, 2010.
C. Olalla, R. Leyva, A. El Aroudi, I. Queinnec, "Robust LQR Control for PWM Converters: an LMI approach," IEEE Transactions on Industrial Electronics, vol.3, no.1, pp.75-85, January 2010.
C. Olalla, R. Leyva, A. El Aroudi, I. Queinnec, "LMI Robust Control Design for Boost PWM Converters," IET Power Electronics, vol. 96, pp. 503-520, 2009.
C. Olalla, R. Leyva, A. El Aroudi, P. Garcés, "QFT Robust Control of Current-Mode Converters: Application to Power Conditioning Regulators," International Journal of Electronics, vol. 96, pp. 503-520, 2009.

Books

C. Olalla, A. El Aroudi, R. Leyva and I. Queinnec, " LMI Robust Control of PWM Converters: An Output-Feedback Approach", Recent Advances in Robust Control, Andreas Mueller (Ed.), InTech, 2011.
C. Olalla, I. Queinnec, R. Leyva, "Robust Linear Control of DC-DC Converters: A Practical Approach to the Synthesis of Robust Controllers", VDM Verlag Dr. Müller, 2010.

Conference Papers

C. Olalla, M. Rodriguez, D. Clement, J. Wang, D. Maksimovic, "Architecture and Control of PV Modules with Submodule Integrated Converters," to be presented at the Thirteenth IEEE Workshop on Control and Modeling for Power Electronics, COMPEL'2012, Kyoto, Japan, 2012.
C. Olalla, I. Queinnec, R. Leyva, "Robust gain-scheduled control of DC-DC converters: an LMI approach," presented at IEEE Multi-Systems Conference, MSC'2011, Denver, USA, 2011.
C. E. Carrejo, R. Giral, E. Arango, C. Ramos-Paja, C. Olalla, and C. Alonso, "Fuel cell hybrid topologies selection and control," presented at IEEE International Conference on Power Engineering, Energy and Electrical Drives, POWERENG'11, Malaga, 2011.
C. Olalla, I. Queinnec, R. Leyva and A. El Aroudi, "Robust Control of Bilinear DC-DC Converters," presented at IEEE International Symposium on Industrial Electronics, ISIE'2010, Bari, Italy, 2010.
E. Gras Marti, C.E. Carrejo González, C. Olalla, E. Vidal Idiarte, B. Estibals, C. Alonso, "Lazo digital de control tensión‐corriente para convertidor Buck," Seminario Anual de Electrónica y Automática Industrial (SAAEI'2010), Bilbao, Spain - 7-9 de Julio de 2010.
C. Olalla, R. Leyva, A. El Aroudi, I. Queinnec, and S. Tarbouriech, "Hinf Control of DC-DC Converters with Saturated Inputs," presented at Proceedings of the IEEE Annual Conference on Industrial Electronics, IECON'09, Porto, 2009.
C. Ramos-Paja, C. Olalla, C. Bordons, A. Romero, R. Leyva, and R. Giral, "Hybrid topologies analysis for fuel cell QFT control design," presented at 15th Interantional Congress of Electrical, Electronic and Systems Engineering, Intercon'08, Trujillo, Peru, 2008.
C. Olalla, R. Leyva, A. El Aroudi, and I. Queinnec, "LMI Control Applied to Non-Minimum Phase Switched Power Converters," presented at IEEE International Symposium on Industrial Electronics, ISIE'2008 2008.
C. Olalla, R. Leyva, and A. El Aroudi, ``Analysis and comparison of extremum seeking control techniques,'' in IEEE International Symposium on Industrial Electronics, ISIE'2007, 2007.
C. Olalla, A. El Aroudi, R. Leyva and I. Queinnec, ``Quantitative feedback contribution to design of voltage regulator modules,'' in IEEE International Symposium on Industrial Electronics, ISIE'2007, 2007.
C. Olalla, R. Leyva, A. El Aroudi, "QFT design for current-mode PWM buck converters operating in continuous and discontinuous conduction modes," 32nd Annual Conference of the IEEE Industrial Electronics Society (IECON'2006), Paris, France - November 7-10, 2006.
C. Olalla, R. Leyva, A. El Aroudi, "Análisis y diseño de convertidores cc-cc elevadores mediante control QFT," Seminario Anual de Electrónica y Automática Industrial (SAAEI'2006), Gijón, Spain - 13-15 de Septiembre de 2006.
C. Olalla, R. Leyva, A. El Aroudi, "Diseño QFT para convertidores reductores PWM operando en modos de conducción continua y discontinua," Seminario Anual de Electrónica y Automática Industrial (SAAEI'2006), Gijón, Spain - 13-15 de Septiembre de 2006.
C. Olalla, R. Leyva, A. El Aroudi, "QFT control for dc-dc buck converters," IEEE International Symposium on Circuits and Systems (ISCAS'2006), Island of Kos, Greece - May 21-24, 2006.
C. Olalla, M. I. Arteaga, A. El Aroudi, R. Leyva, "Análisis y Comparación de Sistemas de Control de Búsqueda del Extremo," Seminario Anual de Electrónica y Automática Industrial (SAAEI'2005), Santander, Spain - 28-30 de Septiembre de 2005.

Links and References:

* Convex Optimization Toolboxes

CVX

* Models of PWM Converter
a)-. Continuous time models for current mode control. References.
1.B. Johansson, “A comparison and an improvement of two continuous-time models for current-mode control”. Telecommunications Energy Conference, 2002. pp. 552 – 559.
2. R.B. Ridley, “A new, continuous-time model for current-mode control”. IEEE Trans. on Power Electronics, Vol. 6, No. 2, April 1991.
3. F.D. Tan, "A unified model for current-programmed converters". IEEE Trans. on Power Electronics, Vol. 10, No. 4, July 1995.
b)-. Continuous time models for current mode control working in Discontinuous Conduction Mode (DCM). References.
1. V. Vorperian, "Sympilified analysis of pwm converters using the model of pwm switch: part i and ii," IEEE Transactions on Aerospace and Electronics Systems, vol. 26, no.2, 1990.
2. R. B. Ridley, "A new continuous-time model for current-mode control with constant frequency, constant on-time, and constant off-time, in ccm and dcm," in IEEE PESC1990.
3. J. Sun, D. M. Mitchell, M. F. Greuel, P. T. Krein, and R. M. Bass, ``Averaged modeling of pwm converters operating in discontinuous conduction mode,'' IEEE Transactions on Power Electronics, vol. 16, no. 4, pp. 482--492, 2001.
c)-. Discrete time models. References.
1. A. R. Brown and R. D. Middlebrook, “Sampled-data modeling of switching regulators,” IEEE Power Electronics Specialists Conference. Boulder, CO, pp. 349-369, 1981.
2.D. Maksimovic, R. Zane, “Small-signal discrete-time modeling of digitally controlled DC-DC converters,” IEEE Trans. Power Electron., Lett., vol. 22, no. 6, pp. 2552-2556, Nov. 2007.

* Discretization of Continuous-time models
Discretization of linear state-space models in Wikipedia.
* Convex Sets
Barycentric Coordinates in Wikipedia.

Projects

RTSensors Homepage ( Very outdated - Abandoned, sorry!!! :-( )
Rtsensors is my small project for LINUX FAN SPEED CONTROL. It is useful to reduce fan noise and increase your computer's reliability.

Matlab Tricks

This is a compilation of my own notes or documents I found ...

A)-. Dynamic code (29/06/2007)
Sometimes you want to create a code which is very repetitive but you want some changes like indexes or similar, and it can not be done with a for loop. This is a stupid example:

for j=1:10
    index=total/j;
    code = [code,'for i=1:',sprintf('%d',index),10];    %10 is the code for new line
    code = [code,'value(i)=',int2str(plant(j)),10];        %sprintf or int2str are used to convert the numbers to strings
    code = [code,'end',10];
end
eval(code);

B)-. Escape a quotation (29/06/2007) Originally taken from this link

>> eval('disp(''''''This is a string'''''')')
'This is a string'

C)-. Escape a single quote (29/06/2007)
To escape a single quote in a string (which could be used for 'eval')

Use '' (two simple quotes) to replace the original '
Example:
code_plant=[code_plant,'[P',sprintf('%d',i),',r]=sconnect,(''iload;r'',''Int;G([1])'',''Kt: Int;G([2])'',''G: iload;Kt'',plant(:,:,i),''Int: e=r-G([1])'',sint);',10];

LaTeX Tricks

This is a compilation of my own notes or documents I found ...

A)-. Unnumbered equations (10/08/2007)

\begin{equation*}
\end{equation*}

B)-. Split equations (10/09/2008)

I have found that the best choice to split equations is the 'split' environment. Avoid 'array' whenever possible.
\begin{equation}
\label{whatever}
\begin{split}
x = & a + b + c + d + \\[optional vertical space]
& e + f + g + h.
\end{split}
\end{equation}

C)-. Unnumbered Part/Chapter/Section/whatever in Table of Contents (21/01/2009)

\chapter*{Chapter Title}

D)-. PsFrag Replacements with rotation and scale (extracted from here) (21/05/2009)

\psfrag{tag}[position][psposition][scale][rotation]{LaTeX}