Suat Gumussoy


 
Bio 

Dr. Gumussoy is a research scientist at Autonomous Systems & Control group at Siemens Corporate Technology in Princeton, NJ. His general research interests are learning, control, identification, optimization and scientific computing with particular focus on reinforcement learning, data-driven control, frequency domain system identification, time-delay systems and their numerical software implementations. 

He serves as an Associate Editor in IEEE Transactions on Control Systems Technology and IEEE Conference Editorial Board. He is a Senior Member of IEEE and a member of IFAC Technical Committee on Linear Control Systems.

Dr. Gumussoy received his B.S. degrees in Electrical & Electronics Engineering and Mathematics from Middle East Technical University at Turkey in 1999 and M.S., Ph.D. degrees in Electrical and Computer Engineering from The Ohio State University at USA in 2001 and 2004. His graduate study is focused on robust control design and time-delay systems. He worked as a system engineer in defense industry (2005-2007) and he was a postdoctoral associate in Computer Science Department at University of Leuven (2008-2011). He was a principal developer in Controls & Identification Team at MathWorks where his contributions ranges from state-of-the-art numerical algorithms to comprehensive analysis & design tools in Control System, Robust Control, System Identification and Reinforcement Learning Toolboxes. 

Contact Info

Research

  • Reinforcement learning and optimal-adaptive control.
  • Frequency domain system identification and model reduction.
  • Control for multiprocessor architecture and wearable devices.
  • Analysis and control of time-delay systems.

Numerical Software

    • @ New York University, Courant Institute of Mathematical Sciences: MATLAB toolbox for fixed-order controller design (HIFOO).
      • fixed-order stabilization, strong stabilization, simultaneous stabilization.
      • fixed-order H∞, H2 optimization.
      • fixed-order complex stability radius, stability margin (spectral abscissa), robust stability margin (pseudospectral abscissa) optimization.
        • HIFOO handles mixed problems and multiple plants, for example, optimizing the H∞ performance of some plants subject to constraints on H2 performance of other plants.

    Publications

    Book

    H. Ozbay, S. Gumussoy, K. Kashima and Y. Yamamoto
    Frequency Domain Techniques for H-Infinity Control of Distributed Parameter Systems
    Advances in Design and Control, SIAM, 2018. [ website ]

    Book Chapters

    [BC4]  S. Gumussoy and W. Michiels
               Tuning an H-Infinity Controller with a Given Order and a Structure for Interconnected Systems with Delays
               Low-Complexity Controllers for Time-Delay Systems, Advances in Delays and Dynamics (edited volume), pp. 95-110, Springer, 2014. [ arXiv ] [ chapter ]

    [BC3]  S. Gumussoy and P. Gahinet
               Computer Aided Control System Design for Time Delay Systems using MATLAB
               Delay Systems, Advances in Delays and Dynamics (edited volume), pp. 257-270, Springer, 2013. [ arXiv ] [ chapter ]

    [BC2]  W. Michiels and S. Gumussoy
               Eigenvalue based algorithms and software for the design of fixed-order stabilizing controllers for interconnected systems with time-delays
               Delay Systems, Advances in Delays and Dynamics (edited volume), pp. 243-256, Springer, 2013. [ arXiv ] [ chapter ]

    [BC1]  S. Gumussoy     and W. Michiels
               Fixed-order H-infinity Optimization of Time-Delay Systems
               Recent Advances in Optimization and its Applications in Engineering (edited volume), pp. 103-112, Springer, 2010. [ arXiv ] [ chapter ]

    Journal Papers

    [J18]  S. An, G. Bhat, S. Gumussoy and U. Y. Ogras
              Transfer Learning for Human Activity Recognition using Representational Analysis of Neural Networks
              arXiv, 2020. [ arXiv ]

    [J17]  G. Bhat, S. Gumussoy and U. Y. Ogras
              Analysis and Control of Power-Temperature Dynamics in Heterogeneous Multiprocessors
              Transactions on Control Systems Technology, vol. 29, no. 1, pp. 329-341, 2020. [ arXiv ] [ paper ]

    [J16]   S. Gumussoy and M. Abu-Khalaf
              Analytic Solution of a Delay differential Equation Arising in Cost Functionals for System with Distributed Delays
              Transactions on Automatic Control, vol. 64, no. 11, pp. 4833-4840, 2019. [ arXiv ] [ paper ]

    [J15]   U. Gupta, M. Babu, R. Ayoub, M. Kishinevsky, F. Paterna, S. Gumussoy and U. Y. Ogras
             
    An Online Learning Methodology for Performance
     
    Modeling of Graphics Processors
     

              IEEE Transactions on Computers, vol. 67, no. 12, pp. 1677-1691, 2018. [ arXiv ] [ paper ]

    [J14]   M. Abu-Khalaf and S. Gumussoy
              Comments on: “Lyapunov matrices for a class of time delays systems” by V. L. Kharitonov
              Available at Arxiv, 2018. [ arXiv ]

    [J13]   G. Bhat, S. Gumussoy and U. Y. Ogras
              Power-Temperature Stability and Safety Analysis for Multiprocessor Systems
              ACM Transactions on Embedded Computing Systems, vol. 16, no. 5, pp. 145:1-20, 2017. [ arXiv ] [ paper ] 

    [J12]   S. Gumussoy and W. Michiels
              Computation of extremum singular values and the strong H-infinity norm of SISO time-delay systems
              Automatica, vol. 54, pp. 266-271, 2015. [ arXiv ] [ paper ] 

    [J11]   S. Gumussoy and W. Michiels
              Root-Locus for SISO Dead-Time Systems: A Continuation Based Approach
              Automatica, vol. 48, no. 3, pp. 480-489, 2012.     [ arXiv ] [ paper ] 

    [J10]       T. D. Quoc, S. Gumussoy, W. Michiels and M. Diehl
              Combining Convex-Concave Decomposition and Linearization Approaches for Static Feedback Controller Design (Regular Paper)
                  IEEE Transactions on Automatic Control, vol. 57, no. 6, pp. 1377-1390, 2012. [ arXiv ] [ paper ] 

    [J9]    S. Gumussoy
              Coprime Inner/Outer Factorization of SISO Time-Delay Systems and FIR Structure of Their Optimal H-Infinity Controllers
              International Journal of Robust and Nonlinear Control, vol. 22, no. 9, pp. 981-998, 2012.     [ arXiv ] [ paper ]

    [J8]    S. Gumussoy and W. Michiels
              Fixed-Order H-infinity Control for Interconnected Systems using Delay Differential Algebraic Equations
              SIAM Journal on Control and Optimization, vol. 49, no. 2, pp. 2212-2238, 2011.     [ arXiv ]     [ paper ]

    [J7]    S. Gumussoy
              Relative Stability Analysis of Closed-Loop SISO Dead-Time Systems: Non-imaginary Axis Case
              Transactions of the Institute of Measurement and Control, vol. 34, no. 4, pp. 411-421, 2011. [ arXiv ] [ paper ]

    [J6]    W. Michiels and S. Gumussoy
              Characterization and Computation of H-infinity Norms for Time-Delay Systems
              SIAM Journal on Matrix Analysis and Applications, vol. 31, no. 4, pp. 2093-2115, 2010. [ arXiv ] [ paper ]

    [J5]    S. Gumussoy and W. Michiels
              A Predictor-Corrector Type Algorithm for the Pseudospectral Abscissa Computation of Time-Delay Systems (Regular Paper)
              Automatica, vol. 46, no. 4, pp. 657-664, 2010. [ arXiv ] [ paper ]

    [J4]    S. Gumussoy and H. Ozbay
             Sensitivity Minimization by Strongly Stabilizing Controllers for a Class of Unstable Time-Delay Systems
             IEEE Transactions on Automatic Control, vol. 54, no. 3, pp. 590-595, 2009. [ arXiv ] [ paper ]
    [J3]    S. Gumussoy and H. Ozbay
              Stable H-infinity Controller Design for Time-Delay Systems
              International Journal of Control, vol. 81, no. 4, pp. 546-556, 2008. [ arXiv ] [ paper ]
    [J2]    S. Gumussoy and H. Ozbay
              Remarks on Strong Stabilization and Stable H-infinity Controller Design
              IEEE Transactions on Automatic Control, vol. 50, no. 12, pp. 2083-2087, 2005. [ arXiv ] [ paper ]
    [J1]    S. Gumussoy and H. Ozbay
              On the Mixed Sensitivity Minimization for Systems with Infinitely Many Unstable Modes
              Systems and Control Letters, vol. 53, no. 3-4, pp. 211-216, 2004. [ arXiv ] [ paper ]

    Conference Proceedings and Abstracts

    [C30]  T. Basaklar, Y. Tuncel, S. Y. Narayana, S. Gumussoy and U. Y. Ogras
               Hypervector Design for Efficient Hyperdimensional Computing on Edge Devices
               accepted to tinyML Research Symposium, 2021. [ arXiv ]

    [C29]   G. Bhat, S. Gumussoy and U. Y. Ogras
               Power and Thermal Analysis of Commercial Mobile Platforms: Experiments and Case Studies
               Design, Automation & Test in Europe Conference & Exhibition (DATE), pp. 144-149, 2019. [ arXiv ] [ paper ]

    [C28]  S. Gumussoy, and H. Ozbay
               On Feedback Stabilization of Neutral Time Delay Systems with Infinitely Many Unstable Poles
               14th IFAC Workshop on Time Delay Systems, Budapest, Hungary, June 28-30, 2018. [ paper (free) ]

    [C27]  S. Gumussoy, A. A. Ozdemir, T. McKelvey, L. Ljung, M. Gibanica, and R. Singh
               Improving Linear State-space Models with Additional Iterations
               18th IFAC Symposium on System Identification, Stockholm, Sweden, July 9-11, 2018. [ arXiv ] [ paper (free) ]

    [C26]  G. Bhat, S. Gumussoy and U. Y. Ogras
               Power-Temperature Stability and Safety Analysis for Multiprocessor Systems
               54th Design Automation Conference, Austin, Texas, USA, June 18-22, 2017. [ preprint ] [ paper ]

    [C25]  A. A. Ozdemir  and S. Gumussoy
               Transfer Function Estimation in System Identification Toolbox via Vector Fitting
               20th IFAC World Congress, Toulouse, France, July 9-14, 2017. [ arXiv ] [ paper (free) ]

    [C24]  U. Gupta, J. Campbell, U. Y. Ogras, R. Ayoub, M. Kishinevsky, F. Paterna and S. Gumussoy
               Adaptive Performance Prediction for Integrated GPUs
               International Conference on Computer-Aided Design (ICCAD), Austin, USA, November 7-10, 2016. [ preprint ] [ paper ]

    [C23]  S. Gumussoy, B. Eryilmaz and P. Gahinet
               Working with Time-Delay Systems in MATLAB
               10th IFAC Workshop on Time-Delay Systems, Boston, USA, June 22-24, 2012. [ arXiv ] [ paper (free) ]

    [C22]  W. Michiels and S. Gumussoy
               Eigenvalue based Analysis and Controller Synthesis for Systems described by Delay Differential Algebraic Equations
               10th IFAC Workshop on Time-Delay Systems, Boston, USA, June 22-24, 2012. [ arXiv ] [ paper (free) ]

    [C21]  S. Gumussoy and W. Michiels
               Direct Strong H-infinity Norm Computation for SISO Time-Delay Systems (invited session)
               3rd International Conference on Control and Optimization with Industrial Applications, Ankara, Turkey, August 22-24, 2011. [ abstract ]

    [C20]  D. Arzelier, G. Deaconu, S. Gumussoy and D. Henrion
               H2 for HIFOO (invited session)
               3rd International Conference on Control and Optimization with Industrial Applications, Ankara, Turkey, August 22-24, 2011. [ abstract ] [ arXiv ]

    [C19]  S. Gumussoy and W. Michiels
               Fixed-order strong H-infinity control of interconnected systems with time-delay (minisymposium)
               Proceedings of the 18th IFAC World Congress, Milano, Italy, August 28-September 2, 2011. [ arXiv ] [ paper (free) ]

    [C18]  S. Gumussoy and W. Michiels
              On the sensitivity of the H-infinity norm of interconnected systems with time-delays (minisymposium)
              Proceedings of the 18th IFAC World Congress, Milano, Italy, August 28-September 2, 2011. [ arXiv ] [ paper (free) ]

    [C17]  S. Gumussoy and W. Michiels
               Continuation Based     Computation of Root-Locus for SISO Dead-Time Systems
               Proceedings of the 9th IFAC Workshop on Time-Delay Systems, 2010. [ arXiv ] [ paper (free) ]

    [C16]  S. Gumussoy and W. Michiels
               Computing H-infinity Norms of Time-Delay Systems
               Proceedings of the 48th IEEE Conference on Decision and Control, pp. 263-268, 2009. [ arXiv ] [ paper ]

    [C15]  S. Gumussoy and W. Michiels
               Fixed-Order H-infinity Optimization of Time-Delay Systems
               14th Belgian-French-German Conference on Optimization, 2009. [ abstract ] [ slides ]

    [C14]  S. Gumussoy and W. Michiels
               Computing the Pseudospectral Abscissa of Time-Delay Systems
               Proceedings of the 8th IFAC Workshop on Time-Delay Systems, 2009. [ arXiv ] [ paper (free) ]

    [C13]  S. Gumussoy, D. Henrion, M. Millstone and M. L. Overton,
               Multiobjective robust control with HIFOO 2.0
               Proceedings of the 6th IFAC Symposium on Robust Control Design, 2009. [ arXiv ] [ paper (free) ]

    [C12]  S. Gumussoy and W. Michiels
               Computing H-infinity Norms of Time-Delay Systems
               28th Benelux Meeting on Systems and Control, 2009. [ abstract ] [ slides ]
    [C11]  S. Gumussoy, M. Millstone and M. L. Overton
               H-infinity Strong Stabilization via HIFOO, a Package for Fixed-Order Controller Design
               Proceedings of the 47th IEEE Conference on Decision and Control, pp. 4135-4140 , 2008. [ arXiv ] [ paper ]
    [C10]  S. Gumussoy, M. Millstone and M. L. Overton
               Design of Fixed-Order Controllers via Nonsmooth Optimization
               SIAM Conference on Optimization, Boston, MA, 2008. [ abstract ] [ slides ]
    [C9]    S. Gumussoy
               On the Zeros of Quasi-Polynomials with Single-Delay
               Proceedings of the American Control Conference, pp. 5282-5286, 2008. [ arXiv ] [ paper ]
    [C8]    S. Gumussoy and M. L. Overton
               Fixed-Order H-Infinity Controller Design via HIFOO, a Specialized Nonsmooth Optimization Package
               Proceedings of the American Control Conference, pp. 2750-2754, 2008. [ arXiv ] [ paper ]
    [C7]    S. Gumussoy and H. Ozbay
               Sensitivity Minimization by Stable Controllers: An Interpolation Approach for Suboptimal Solutions
               Proceedings of the 46th IEEE Conference on Decision and Control, pp. 6071-6076, 2007. [ arXiv ] [ paper ]
    [C6]    S. Gumussoy and H. Ozbay
               Sensitivity minimization by stable controllers for a class of unstable time-delay systems
               Proceedings of the 9th International Conference on Control, Automation, Robotics and Vision, pp. 1-5, 2006. [ arXiv ] [ paper ]
    [C5]    H. Ozbay and S. Gumussoy
               Remarks on H-infinity Controller Design for SISO Plants with Time Delays
               Proceedings of the 5th IFAC Symposium on Robust Control Design, 2006. [ arXiv ]

    [C4]    S. Gumussoy and H. Ozbay
               Remarks on Strong Stabilization and Stable H-infinity Controller Design
               Proceedings of the 43rd IEEE Conference on Decision and Control, vol. 3, pp. 2621-2624, 2004. [ arXiv ]

    [C3]    S. Gumussoy and H. Ozbay
               On Stable H-infinity Controllers for Time Delay Systems
               Proceedings of 16th International Symposium on Mathematical Theory of Network and Systems, 2004. [ arXiv ]
    [C2]    M. Saglam, S. Ezercan, S. Gumussoy and H. Ozbay
               Controller tuning for active queue management using a parameter space method
               Proceedings of the 16th International Symposium on Mathematical Theory of Network and Systems, 2004. [ arXiv ]

    [C1]    S. Gumussoy and H. Ozbay
               Control of Systems with Infinitely Many Unstable Modes and Strong Stabilizing Controllers Achieving a Desired Sensitivity
               Proceedings of the 15th International Symposium on Mathematical Theory of Network and Systems, pp. 1-10, 2002. [ arXiv ]

    Patents

    [P1]    S. Gumussoy, P. J. Mosterman, A. Ozdemir
               Discretization of a model of a system or a portion of the model using system inputs and outputs
               US Patent App., 15/656,560, 2019. [ link ]

    PhD Thesis

    S. Gumussoy
    Optimal H-infinity controller design and strong stabilization for time-delay and MIMO systems
    Doctor of Philosophy, Ohio State University, Electrical Engineering, 2004. [ link ]

    Webinar

    [W]    S. Gumussoy
              Time-Delay Systems: Analysis and Design with MATLAB and Simulink
              MathWorks, December 4, 2012. [ link ]

    Blog

    [B]     P. Gahinet, S. Gumussoy, E. Korkut and M. Cuenant
              Control System Tuning without Guess or Stress
              MathWorks, April 3, 2014. [ link ]