Leonidas Dritsas

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Research Interests:

My interests lie in the areas of Networked Control, Robust Control, Time-Delayed Systems, Guidance and Control of Aerospace Systems, Constrained Control and Industrial Robot Control Applications.

I am a member of the Control System Lab at NTUA (http://www.controlsystemslab.gr/ Prof. K. Kyriakopoulos http://site.csl.mech.ntua.gr/main/ ) and the “Anemos” research group (U. of Patras http://anemos.ece.upatras.gr/ Prof. A. Tzes). I have authored/co-authored eight (8) journal papers, twenty nine (29) refereed conference papers and two Book Chapters, while i have served as Reviewer in eight(8) Intl. Journals, thirteen(13) Intl. Conferences and session chairman in three international conferences.

Contact Details:

Email: ldri@otenet.gr | leonidasdr@gmail.com
Phone: 2107721726
Office: Dept. of Mechanical Engineering, Building M, Ground Floor
Website: www.controlsystemslab.gr/main/members/dritsas?

Publications:

Journal Papers

    [J8] S. Theodoulis, V. Gassmann, P. Wernert, L. Dritsas, I.Kitsios, A.Tzes, “Guidance and Control Design of a Class of Fin-Controlled Spin-Stabilized Projectiles”, JOURNAL OF GUIDANCE, CONTROL, AND DYNAMICS (AIIA), Vol. 36, No. 2, March–April 2013, http://dx.doi.org/10.2514/1.56520

    [J7] George Bitsoris, Nikolaos Athanasopoulos and Leonidas Dritsas, “Stability, positive invariance and design of constrained regulators for networked control systems” Int. Journal of Control, Volume 85, Issue 10, 2012 , pages 1401-1413 (Version of record first published online: 09 May 2012, see http://www.tandfonline.com/doi/abs/10.1080/00207179.2012.685763)

    [J6] Vasilis Tsoulkas, Athanasios A Pantelous, Leonidas Dritsas and Christos I Papachristos, “An Integrated e-Learning Solution for Control Systems Education and Future Perspectives”, International Journal of Simulation Systems, Science & Technology, Volume 12, Number 1, February 2011 http://ijssst.info/Vol-12/No-1/paper2.pdf

    [J5] G. Halikias, L. Dritsas, A. Pantelous and V. Tsoulkas, “Strong stability of discrete-time systems”, Linear Algebra and its Applications, Volume 436, Issue 7, Pages 1890–1908, http://www.elsevier.com/wps/find/journaldescription.cws_home/522483/description#description, http://dx.doi.org/10.1016/j.laa.2011.09.024

    [J4] L. Dritsas and ?. Tzes “Computation of Robust Stability Bounds for Networked Systems with Varying Delays” Intl. Journal. Systems, Control and Communications, Inderscience Enterprises (Accepted 08-January-2011 as Paper ID Number: IJSCC 10-P0301 – online since March 21, 2012 – DOI: 10.1504/IJSCC.2012.045929 Volume 4, Number 1–2/2012 )
    (see http://inderscience.metapress.com/content/x815245w20501062/)

    [J3] L. Dritsas and ?. Tzes “Robust Stability ?n?lysis ?f Networked Systems with Varying Delays” – “International J?urnal ?f Contr?l” Vol. 82, No. 12, December 2009, pages 2347–2355, (first appeared Aug. 2009, DOI: 10.1080/00207170903061705 )

    [J2] L. Dritsas and A. Tzes, “Robust Stability Bounds for Networked Controlled Systems with Unknown, Bounded and Varying Delays”, IET Control Theory & Applications, Volume 3 Issue 3 (March 2009), pages 270 – 280 (http://dx.doi.org/10.1049/iet-cta:20070384 and http://digital-library.theiet.org/content/journals/10.1049/iet-cta_20070384 )

    [J1] Spyros Tzafestas and Leonidas Dritsas, “Combined computed torque and model reference adaptive control of robot systems”, Journal of the Franklin Institute Volume 327, Issue 2 , 1990, pages 273-294 doi:10.1016/0016-0032(90)90022-B

Book Chapters

    [B2] G. Halikias, G. Leventakis, C. Kontoes, V. Tsoulkas and L. Dritsas, “Design Issues of an Integrated Fire Detection System: Component and Sub-Systems Definition” – Published in the book: “Satellite Communications”, ISBN 978-953-307-338-5 by Intech Open Access publisher (Freely Available Online at http://www.intechopen.com/articles/show/title/design-issues-of-an-operational-fire-detection-system-integrated-with-observation-sensors)

    [B1] K. Alexis , G. Nikolakopoulos , A. Tzes and L. Dritsas, “Coordination of Helicopter UAVs for Aerial Forest-Fire Surveillance”, pages 169 – 193 of the Book: “Applications of Intelligent Control to Engineering Systems” , International Series on Intelligent Systems, Control and Automation: Science and Engineering, 2009, Volume 39, Part II, 169-193, DOI: 10.1007/978-90-481-3018-4_7, by SpringerLink, Editor: Kimon P. Valavanis. – Chapter available at http://www.springerlink.com/content/k37454wr84n57715/ – Book available at http://www.springerlink.com/content/978-90-481-3017-7/#section=60731&page=1

Conference Papers

    [C29] Panos Marantos, Leonidas Dritsas, Kostas J. Kyriakopoulos, “Robust Attitude Control for an Unmanned Helicopter in Near-Hover Flights”, Proceedings of the European Control Conference 2013, July 17-19, 2013, Zurich, Switzerland.

    [C28] Panos Marantos, Leonidas Dritsas, Kostas J. Kyriakopoulos, “Robust H2/H? Position Tracking Control of an Unmanned Helicopter for Near-Hover Flights”, Proceedings of the 21st Mediterranean Conference on Control and Automation (http://med13.du.edu/index.php), June 25 – 28, 2013 Platanias-Chania, Crete – GREECE.

    [C27] Nikolaos Athanasopoulos, George Bitsoris, and Leonidas Dritsas, “A polyhedral approach to the stability analysis and feedback stabilization of networked control systems”, Proceedings of the 19th Mediterranean Conference on Control and Automation (http://www.med2011.org), pages 1008 – 1013, DOI: 10.1109/MED.2011.5983214.

    [C26] S. Theodoulis, I. Kitsios, L. Dritsas, A. Tzes and P. Wernert, “Autopilot Strategies for Guided Gun-Launched Projectiles”, Proceedings of the 19th Mediterranean Conference on Control and Automation (http://www.med2011.org), pages 248 – 253, DOI: 10.1109/MED.2011.5983066.

    [C25] V. Tsoulkas, A. Pantelous, L. Dritsas, C.Papachristos, “Hybrid Terrestrial-Satellite Architecture for Control Systems Education”, Proceedings of the UKSim – AMSS 13th International Conference on Modelling and Simulation (http://uksim.info/uksim2011/uksim2011.htm), Cambridge University (Emmanuel College), 30 March – 1 April 2011 http://doi.ieeecomputersociety.org/10.1109/UKSIM.2011.41

    [C24] L. Dritsas, A. Zagorianos, A. Pantelous, V. Tsoulkas, “Assessment of Linear Set–Point Controllers for a Direct Drive Nonlinear Pendulum”, Proceedings of the UKSim – AMSS 13th International Conference on Modelling and Simulation (http://uksim.info/uksim2011/uksim2011.htm), Cambridge University (Emmanuel College), 30 March – 1 April 2011
    DOI: http://doi.ieeecomputersociety.org/10.1109/UKSIM.2011.46

    [C23] A. Pantelous, A. Karageorgos, L. Dritsas and V. Tsoulkas, “Higher Order Differential Delay Systems with Control Applications”, Proceedings of EUROSIM 2010 (7thEUROSIM Congress on Modelling and Simulation), September 6 – 10, 2010, Prague, Czech Republic (http://www.eurosim2010.org).

    [C22] Leonidas Dritsas and Anthony Tzes, “Robust Guaranteed–Cost Controllers for Networked Systems with Varying Delays”, 18th Mediterranean Conference on Control and Automation, Morocco, 23-25 June 2010 (http://www.med10.org/).

    [C21] V. Tsoulkas, L. Dritsas, and A. Pantelous, “Technical Challenges in Network-Centric Control and Communication Systems”, Proceedings of ISMS 2010, 25 – 27 January, Liverpool, UK
    (http://www.isms2010.org.uk/) page(s): 256 – 263. DOI: 10.1109/ISMS.2010.55 (IEEE Computer Society)

    [C20] L. Dritsas, V. Tsoulkas, A. Pantelous and A. Tzes, “Robust Performance Issues in Tracking Control over Networks”, Proceedings of ISMS 2010, 25 – 27 January, Liverpool, UK. (http://www.isms2010.org.uk/) page(s): 264 – 269. DOI: 10.1109/ISMS.2010.56 (IEEE Computer Society)

    [C19] Leonidas Dritsas and Anthony Tzes, “Robust Stability Analysis of Networked Systems with Varying Delays”, European Control Conference 2009, Budapest, Hungary, August 23-26, 2009 (http://www.conferences.hu/ecc09/)

    [C18] Bitsoris Georges, Athanasopoulos Nikolaos, Dritsas Leonidas, “Feedback Stabilization of Networked Control Systems” 2009 IEEE Multi-conference on Systems and Control July 8-10, 2009, Saint Petersburg, Russia (http://conf.physcon.ru/msc09/) DOI: 10.1109/CCA.2009.5280975

    [C17] Leonidas Dritsas and Anthony Tzes, “Robust Stability Bounds for Networked Systems with Varying Delays”, The 17th Mediterranean Conference on Control & Automation, MED 2009, Thessaloniki, Greece, Jun 24 -26, 2009. (http://www.med09.org/) DOI: 10.1109/MED.2009.5164638

    [C16] Leonidas Dritsas and Anthony Tzes, “Constrained Control of Event-Driven Networked Systems”, in the Proceedings of the 17th IFAC World Congress, July 6-11, 2008. Seoul Korea (p. 11600–11605) – freely available at http://www.nt.ntnu.no/users/skoge/prost/proceedings/ifac2008/data/papers/3609.pdf

    [C15] Leonidas Dritsas and Anthony Tzes, “Modelling Approaches and Robust Stability Conditions for Networked Controlled Systems with Uncertain Delays”, in Proceedings of the 17th IFAC World Congress, July 6-11, 2008. Seoul Korea (p.6353–6358) – freely available at http://www.nt.ntnu.no/users/skoge/prost/proceedings/ifac2008/data/papers/1322.pdf

    [C14] L. Dritsas, G. Nikolakopoulos and A. Tzes, “Constrained Optimal Control for a Special class of Networked Systems”, in Proceedings of the 2007 American Control Conference (ACC’07), New York City, USA , July 11-13, 2007 DOI 10.1109/ACC.2007.4283073 (IEEE Xplore)

    [C13] Leonidas Dritsas and Anthony Tzes, “Robust Output Feedback Control of Networked Systems”, in Proceedings of the European Control Conference 2007, Kos, Greece 2-5 July 2007 (http://ecc07.ntua.gr/)

    [C12] Leonidas Dritsas and Anthony Tzes, “Networked Controlled Systems: Modeling Issues for Robust Control”, in Proceedings of the Workshop on Networked Distributed Systems for Intelligent Sensing and Control, Saturday, June 30, 2007 Kalamata, Greece, see (http://www.nd.edu/~pantsakl/kworkshop.htm) and the abstract at (http://med.ee.nd.edu/kalamata-2007/abstracts.pdf)

    [C11] L. Dritsas, G. Nikolakopoulos and A. Tzes, “On the Modeling of Networked Controlled Systems”, in Proceedings of the 15th Mediterranean Conference on Control and Automation, MED’07, June 27—29, Athens, GREECE DOI 10.1109/MED.2007.4433699 (IEEE Xplore) (http://med.ee.nd.edu/MED15-2007/papers/T09-004-897.pdf)

    [C10] L. Dritsas, G. Nikolakopoulos and A. Tzes, “Constrained Finite Time Optimal Control of a Micro – Capacitor” in Proceedings of the 32nd Annual Conference of the IEEE Industrial Electronics Society,( Page(s):3161 – 3165) IEEE- IECON’06, Paris – FRANCE, November 7 – 10, 2006 DOI 10.1109/IECON.2006.347557 (IEEE Xplore)

    [C9] L. Dritsas, G. Nikolakopoulos, and A. Tzes, “Constrained Optimal Control Over Networks with uncertain delays,” in Proceedings of the 45th IEEE Conference on Decision and Control, San Diego CA, USA, Dec. 13–15, 2006 Page(s):4993 – 4998 DOI 10.1109/CDC.2006.377636 (IEEE Xplore)

    [C8] Leonidas Dritsas, Anthony Tzes, George Nikolakopoulos, “Constrained Finite Time Control of Networked Systems with uncertain delay” – Proceedings of the 14th Mediterranean Conference on Control and Automation 2006, Ancona-June 28-30, Italy, 2006. DOI 10.1109/MED.2006.328765 (IEEE Xplore)

    [C7] George Nikolakopoulos, Leonidas Dritsas, Anthony Tzes and John Lygeros, “Adaptive Constrained Control of Uncertain ARMA–Systems based on Set Membership Identification” – Proceedings of the 14th Mediterranean Conference on Control and Automation” 2006, Ancona-June 28-30, Italy, 2006. DOI 10.1109/MED.2006.328814 (IEEE Xplore)

    [C6] Anthony Tzes, George Nikolakopoulos, Leonidas Dritsas, “Design and Sensitivity Analysis of Constrained Finite Time Optimal Controller for a Micro-Actuator” the 2005 Joint ISIC-13th Mediterranean Conference on Control and Automation (MED) Conference, June 27-29, 2005 Limassol, Cyprus (Proc. Page(s): 958- 963, Paper TuM06.2, DOI 10.1109/.2005.1467143 (IEEE Xplore)

    [C5] George Nikolakopoulos, Anthony Tzes, Leonidas Dritsas, Yiannis Koveos, “Multi–Parametric H-infinity Control of a Micro-Actuator”, 16th IFAC World Congress Praha 2005.

    [C4a] A. Ikonomopoulos and L. Dritsas, “Recent Advances in Robot Grinding”, The European Robotics and Intelligent Systems Conference, Corfu, Greece, June 1991.
    (also in [C4b] Ikonomopoulos, A., Dritsas, L. (1992), “Recent advances in robot grinding”, in Tzafestas, S.G. (Eds), Robotic Systems – Advanced Techniques and Applications, Kluwer, Dordrecht, pp.603-10.)

    [C3] S. Tzafestas, G. Stavrakakis and L. Dritsas, “Performance Analysis of the Computed Torque Method for Robotic Manipulators with fast actuators”, Proceedings of IEEE Intl Conference on Control and Applications (ICCON ’89), Jerusalem, April 3- 6, 1989 (Page(s):734-739)

    [C2] S. Tzafestas, L. Dritsas, J. Kanellakopoulos, “Robust Robot Control: A comparison of three techniques through simulation”, 12th IMACS World Congress on Scientific Computation, Paris 1988.

    [C1] L. Dritsas and S. Tzafestas, “An algorithm for Robust Robot Control via the FCT and MRAC Techniques”, Proceedings of the First European Conference on Informational technology for Organisational Systems (EURINFO ’88) Athens, Greece, May 1988.