Nonlinear & Adaptive Control Laboratory
Azad Ghaffari
Postdoctoral Research Fellow
Department of Mechanical and Aerospace Engineering
University of California, San Diego
9500 Gilman Drive
La Jolla, CA 92093-0411
Office: 1801 EBU1
E-mail: aghaffari@ucsd.edu
Ph: (858) 822-2406
I currently work under the supervision of Prof. Miroslav Krstić on safety verification of
cyber-physical systems and performance optimization of systems with state-dependent sample rate.
Research Interests
- Controls
Safety verification, distributed supervisory control design, component swapping modularity, linear matrix inequalities, extremum seeking,
sliding mode control, and artificial neural networks.
- Energy Systems
Aggregate modeling and power control of responsive loads, load forecasting, photovoltaic systems, wind energy conversion systems, combined cycle power generators,
induction machines, multiphase synchronous machines, power electronics theory, multilevel inverters, and DC-DC converters.
- Precision Mechatronics
High-precision motion control and contouring, cross-coupling control, contour error estimation,
distributed servo-systems, flexible-link robots, autonomous vehicles.
Past and Current Research
Google Scholar Citations
Education
Ph.D. in Engineering Sciences (2013),
University of California, San Diego   and   San Diego State University (joint degree)
Master of Science in Electrical Engineering (2004),
K. N. Toosi University of Technology
Bachelor of Science in Electrical Engineering (2001),
K. N. Toosi University of Technology
Work Experience
Postdoctoral Research Fellow, under supervision of Prof. Galip Ulsoy, U-M, Ann Arbor (2014-2016)
Postdoctoral Research Fellow, under supervision of Prof. Miroslav Krstić and Prof. Scott Moura, UCSD, San Diego (2013-2014)
Graduate Research Fellow, under supervision of Prof. Miroslav Krstić and Prof. Sridhar Seshagiri, UCSD-SDSU, San Diego (2009-2013)
Design Engineer, Interra Energy, Inc., San Diego (Summer 2012)
Design Engineer, Monenco Iran Company, Tehran-Iran (2007-2009)
Electrical Engineering Instructor, Sanandaj Azad University, Sanandaj-Iran (2008)
Research Engineer, Niroo Research Institute, Tehran-Iran (2004-2007)
Teaching Assistant and Graduate Researcher, K. N. Toosi University of Technology, Tehran-Iran (2001-2004)
Publications
Journal Papers
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A. Ghaffari and A. G. Ulsoy, Component
swapping modularity for distributed precision contouring,
IEEE/ASME Transactions on Mechatronics, to appear.
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A. Ghaffari and A. G. Ulsoy, LMI-based design of distributed controllers to achieve component
swapping modularity, IEEE Transactions on Control Systems Technology, to appear.
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A. Ghaffari and A. G. Ulsoy, Dynamic contour error estimation and
feedback modification for high-precision contouring,
IEEE/ASME Transactions on Mechatronics, DOI 10.1109/TMECH.2015.2494518.
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A. Ghaffari, S. Moura, and M. Krstić, Modeling, control,
and stability analysis of heterogeneous thermostatically controlled load populations using partial
differential equations, ASME Journal of Dynamic Systems, Measurement, and Control,
vol. 137, pp. 101009(1-9), 2015.
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A. Ghaffari, S. Seshagiri, and M. Krstić, Multivariable
maximum power point tracking for photovoltaic micro-converters using extremum seeking,
Control Engineering Practice, vol. 35, pp. 83-91, 2015.
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A. Ghaffari, M. Krstić, and S. Seshagiri, Power
optimization for photovoltaic micro-converters using multivariable Newton-based extremum
seeking, IEEE Transactions on Control Systems Technology, vol. 22, pp. 2141-2149, 2014.
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A. Ghaffari, M. Krstić, and S. Seshagiri, Power
optimization and control in wind energy conversion systems using extremum seeking,
IEEE Transactions on Control Systems Technology, vol. 22, pp. 1684-1695, 2014.
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A. Ghaffari, M. Krstić, and S. Seshagiri, Extremum
seeking for wind and solar energy applications, Mechanical Engineering,
vol. 136, no. 3, pp. S13-S21, March 2014.
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A. Ghaffari, M. Krstić, and D. Neić,
Multivariable Newton-based extremum seeking, Automatica, vol. 48, pp. 1759-1767, 2012.
Conference Papers
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A. Ghaffari, I. Abel, D. Ricketts, S. Lerner, and M. Krstić, Safety verification using barrier
certificates with application to second order systems with constrained discrete inputs,
American Control Conference, submitted.
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A. Ghaffari and A. G. Ulsoy, Experimental verification of component swapping modularity
for precision contouring, American Control Conference, 2017.
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A. Ghaffari and A. G. Ulsoy, Design of distributed controllers for component swapping modularity
using linear matrix inequalities, in Proc. of IEEE International Conference on Advanced Intelligent
Mechatronics, 2016.
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A. Ghaffari and A. G. Ulsoy, Experimental verification of dynamic contour error estimation
for high-precision contouring of two-axis servo-systems, in Proc. of ASME Dynamic
Systems and Control Conference, 2015.
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A. Ghaffari and A. G. Ulsoy, Newton-based contour error estimation
and robust cross-coupling control for high-precision
fast contouring, in Proc. of American Control Conference, 2015.
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A. Ghaffari, S. Moura, and M. Krstić, Analytic modeling and
integral control of heterogeneous thermostatically controlled load populations, in Proc.
of ASME Dynamic Systems and Control Conference, 2014.
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M. Krstić, A. Ghaffari, and S. Seshagiri , Extremum seeking for wind and solar energy applications,
in Proc. of 1st International Conference on Electrical, Electronic and Computing Engineering, Keynote Session, 2014.
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M. Krstić, A. Ghaffari, and S. Seshagiri , Extremum seeking for
wind and solar energy applications, in Proc. of 11th World Congress on Intelligent
Control and Automation, Plenary Lecture, 2014.
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A. Ghaffari, M. Krstić, and S. Seshagiri, Power optimization and control in wind energy conversion
systems using extremum seeking, in Proc. of American Control Conference, 2013.
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A. Ghaffari, M. Krstić, and S. Seshagiri, Power optimization for photovoltaic micro-converters using
multivariable Newton-based extremum-seeking, in Proc. of IEEE Conference on Decision and Control, 2012.
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A. Ghaffari, S. Seshagiri, and M. Krstić, Power optimization for photovoltaic micro-converters using
multivariable gradient-based extremum-seeking, in Proc. of American Control Conference, 2012.
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A. Ghaffari, M. Krstić, and D. Neić, Multivariable Newton-based extremum seeking, in Proc. of
IEEE Conference on Decision and Control, 2011.
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A. Ghaffari and M. J. Yazdanpanah, Computing optimized nonlinear sliding surfaces,
in Proc. of Chinese Control and Decision Conference, 2008.
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M. J. Yazdanpanah and A. Ghafari, Modification of sliding mode controller by using a neural
network with application to a flexible-link, in Proc. of European Control Conference, 2003.
Educational Notes
The following documents are prepared for educational purposes and, upon recognizing the source, can be used by interested scholars.
Last updated on 10 Oct 2017