Laurentiu Hetel

Chargé de Recherche (Researcher) - CNRS

Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL UMR CNRS 9189) - Centrale Lille

Leader of the Thematic Group: Control and Scientific Computing (CO2)

Member of the team: Hybrid Systems: Observation and Control (SHOC)



Université de Lille - Campus scientifique

Bâtiment ESPRIT

Avenue Henri Poincaré

59655 Villeneuve d'Ascq


Laurentiu Hetel is a Research Scientist (Chargé de Recherche) at the Centre National de la Recherche Scientifique (CNRS). He works with CRIStAL (UMR CNRS 9189), Lille, France. He received the PhD Degree in Automatic Control from the Institut National Polytechnique de Lorraine, Nancy University, France, in 2007. He was a postoctoral fellow at the Eindhoven University of Technology (April to October 2008). His research interests are in hybrid dynamical systems and sampled-data control. He is currently an Associate Editor for Systems and Control Letters and the Leader of the Thematic group Control and Scientific Computing (approx. 60 members) of CRIStAL.

Major Interests

  • Hybrid Systems
  • Sampled - data control and Networked / Embedded Control Systems

PhD students

  • Xinyong WANG. thesis title : "Stabilization of infinite dimensional systems by hybrid control laws" - supervised together with C. Fiter and Y. Tang
  • Deesh DILEEP. thesis title: "Network design for decentralized control". (H2020 UCOCOS, KU Leuven & Centrale Lille, Mars 2020) - supervised together with J.P. Richard, W. Michiels
  • Jijju THOMAS. thesis title: "Networks with event triggered coupling" (H2020 UCOCOS: estimated end-date: October 2020) - supervised together with J.P. Richard, N.v.d. Wouw.
  • Zohra KADER, thesis title: "Observation et commande des systèmes affines à commutation" (Lille 1, September 2017) - supervised together with C. Fiter and L. Belkoura, now Assistant Professor at Univ. Toulouse.
  • Hassan OMRAN, thesis title: "Commande et observation des systèmes en réseau" (Ecole Centrale de Lille, Mars 2014) - supervised together with J.P. Richard and F. Lamnabhi-Lagarrigue; now Assistant Professor at Univ. of Strasbourg.
  • Christophe FITER, thesis title: "Contribution à la commande robuste des systèmes à échantillonnage variable ou contrôlé" (Ecole Centrale de Lille, September 25th, 2012) - Best young researcher article award at MSR2011 - supervised together with J.P. Richard and W. Perruquetti; now Assistant Professor at Université de Lille.

Post-Doctoral fellows

  • Mert BASTUG (ANR ROCC-SYS); now engineer at Siemens
  • Lucien ETIENNE (ARCIR ESTIREZ, INRIA); now Assistant Professor at Ecoles de Mines de Douais.
  • Hector RIOS (ARCIR ESTIREZ, INRIA); now Research Fellow at Instituto Tecnológico de La Laguna, Mexico.
  • Srinath GOVINDASWAMY (SYSIASS, Ecole Centrale de Lille).
  • Romain DELPOUX (ATER - Univ. Lille 1); now Assistant Professor at INSA Lyon.

Participation to research projects

  • ANR project "DIGItal set-valued and homogeneous SLIding mode control and Differentiators: the implicit approach" (DIGITSlid)
  • ANR JC-JC project "Robust Control of Cyber-Physical Systems" (ROCC-SYS)
  • H2020 "Understanding and Controlling of Complex Systems" (UCOCOS)
  • ARCIR (Conseil régional Nord Pas de Calais) - "Estimation distribuée de systèmes dynamiques en réseaux" (ESTIREZ)
  • FP7 - NoE HYCON 2
  • Interreg IV A 2 Mers Seas Zeeën - Sysiass

Selected Publications

Most of the recent publications are available on the website of CRIStAL.

Sampled-Data Control and Networked/Embedded Control Systems

Laurentiu Hetel, Christophe Fiter, Hassan Omran, Alexandre Seuret, Emilia Fridman, Jean-Pierre Richard, Silviu-Iulian Niculescu. Recent developments on the stability of systems with aperiodic sampling: an overview, Automatica, survey paper, 2017 (preprint)

Lucien Etienne, Laurentiu Hetel, Denis Efimov, Mihaly Petreczky. "Observer synthesis under time-varying sampling for Lipschitz nonlinear systems". Automatica, 2017

Hassan Omran, Laurentiu Hetel, Mihaly Petreczky, Jean-Pierre Richard, Françoise Lamnabhi-Lagarrigue. Stability analysis of some classes of input-affine nonlinear systems with aperiodic sampled-data control. Automatica, 2016

Alexandre Seuret, Laurentiu Hetel, Jamal Daafouz and Karl H. Johansson (dir) . Delays and Networked Control Systems. Springer Series: Advances in Delays and Dynamics (ADD@S), Springer, ISBN: 978-3-319-32371-8, 2016

Hassan Omran, Laurentiu Hetel, Jean-Pierre Richard, Françoise Lamnabhi-Lagarrigue. Stability Analysis of Bilinear Systems Under Aperiodic Sampled-Data Control, Automatica. 2014

Christophe Fiter, Laurentiu Hetel, Wilfrid Perruquetti, Jean-Pierre Richard - A State Dependent Sampling for Linear State Feedback, Automatica, Volume 48, Issue 8, August 2012, Pages 1860–1867

L. Hetel, A. Kruszewski, W. Perruquetti, J.-P. Richard, - Discrete and intersample analysis of systems with aperiodic sampling, IEEE Transactions on Automatic Control, 2011

L. Hetel, J. Daafouz, M. Jungers, J-P Richard. Delay-dependent sampled-data control based on delay estimates, Systems & Control Letters, 2011

M. Cloosterman, L. Hetel, N. Van De Wouw, M. Heemels, J. Daafouz, H. Nijmeijer, - Controller synthesis for networked control systems. Automatica, 2010

M.C.F. Donkers, L Hetel, W.P.M.H. Heemels, N. van de Wouw, M. Steinbuch, "Stability Analysis of Networked Control Systems using a Switched Linear Systems Approach", Lecture Notes in Computer Science. 12th International Conference on Hybrid Systems:Computation and Control 2009, San Francisco, USA; Editors: Rupak Majumdar and Paulo Tabuada, Spring

Laurentiu Hetel, Jamal Daafouz, Claude Iung. - Analysis and control of LTI and switched systems in digital loops via an event-based modeling - International Journal of Control, 2008

Hybrid Systems

Laurentiu Hetel, Jamal Daafouz, Claude Iung. – Stabilization of Arbitrary Switched Linear Systems With Unknown Time-Varying Delays – IEEE Transactions on Automatic Control, Volume: 51 – Issue: 10 – page(s): 1668- 1674, October 2006,

Laurentiu Hetel, Jamal Daafouz, Claude Iung - Equivalence between the Lyapunov-Krasovskii functional approach for discrete delay systems and the stability conditions for switched systems – Nonlinear Analysis: Hybrid Systems 2, 3 (2008) 697-705,

Laurentiu Hetel, Jamal Daafouz, Sophie Tarbouriech, Christophe Prieur. Stabilization of linear impulsive systems through a nearly-periodic reset. Nonlinear Analysis: Hybrid Systems Volume 7, Issue 1, February 2013, Pages 4–15 special issue IFAC World Congress 2011

Laurentiu Hetel, Emilia Fridman, "Robust sampled-data control of switched affine systems", IEEE Transactions on Automatic Control, 2013

Laurentiu Hetel, Emmanuel Bernuau. "Local Stabilization of Switched Affine Systems", IEEE Transaction on Automatic Control. 2015

Laurentiu Hetel, Emilia Fridman, Thierry Floquet. "Variable Structure Control with Generalized Relays: A Simple Convex Optimization Approach", IEEE Transaction on Automatic Control. 2015

Zohra Kader, Christophe Fiter, Laurentiu Hetel, Lotfi Belkoura. Stabilization by a relay control using non-quadratic Lyapunov functions. Automatica. in press.

Laurentiu HETEL, Michael DEFOORT, Mohamed DJEMAI. "Binary Control Design for a Class of Bilinear Systems: Application to a Multilevel Power Converter", IEEE Transactions on Control Systems Technology, 2016