Selected Recent Journal Publications (Out of 38)

Sipahi, R., 2014, Delay-Margin Design for the General Class of Single-Delay Retarded-Type LTI Systems, International Journal of Dynamics and Control, 2(2), 198-209. available on-line

Qiao, W., Sipahi, R., 2014, Delay-dependent Coupling for a Multi-agent LTI Consensus System with Inter-agent Delays, Physica D: Nonlinear Phenomena, 267, 112-122. available on-line

Sipahi, R., Delice I.I., 2014, On Some Features of Core Hypersurfaces Related to Stability Switching of LTI Systems with Multiple Time Delays, IMA Mathematical Control and Information, 31(2), 257-272. available on-line

Qiao, W., Sipahi, R., 2013, A Linear Time-Invariant Consensus Dynamics with Homogeneous Delays: Analytical Study and Synthesis of Rightmost Eigenvalues, SIAM Journal on Control and Optimization, 51(5), 3971-3992. available on-line

Nia, P.M., Sipahi, R., 2013, Controller Design for Delay-independent Stability of Linear Time-Invariant Vibration Systems with Multiple Delays, Journal of Sound and Vibration, 332(14), 3589-3604.

Delice, I.I., Sipahi, R., 2012, Delay-Independent Stability Test for Systems with Multiple Time-Delays, IEEE Transactions on Automatic Control, 57(4), pp. 963-972. available on-line

Qiao, W., Sipahi, R., 2012, Rules and Limitations of Building Delay-tolerant Topologies for Coupled Systems, Physical Review E, 85(2), pp. 016104.

Sipahi, R., Qiao, W., 2011, Responsible Eigenvalue Concept for the Stability of a Class of Single-Delay Consensus Dynamics with Fixed Topology, IET Control Theory & Applications, 5(4), pp. 622-629. available on-line

See also: Qiao, W., Sipahi, R., 2012, Errata: Responsible eigenvalue concept for the stability of a class of single-delay consensus dynamics with fixed topology (vol 5, pg 622, 2011), IET Control Theory and Applications, 6(8), pp 1154. available on-line

Sipahi, R., Niculescu, S.-I., Abdallah, C.T., Michiels, W., Gu, K., 2011, Stability and Stabilization of Systems with Time Delay, Limitations and opportunities, invited article, IEEE Control Systems Magazine, 31(1), pp. 38-65. available on-line

Sipahi, R., Delice, I.I., 2011, Advanced Clustering with Frequency Sweeping Methodology for the Stability Analysis of Multiple Time-Delay Systems, IEEE Transactions on Automatic Control, 56(2), 467-472. available on-line ** Correction in the Numerical Example ** IEEE TAC did not see it necessary for an erratum on this correction (October 2012). Correction is posted here.

Sipahi, R., Niculescu, S.-I., 2010, Stability of Car Following with Human Memory Effects and Automatic Headway Compensation, invited article, theme issue Traffic jams - dynamics and control, Theme Editors: Gabor Stepan, Gabor Orosz, Eddie Wilson, Philosophical Transactions of the Royal Society A, 368(1928), 4563-4583. available on-line

Marion, T., Sipahi, R., 2010, Early-Stage Firms and Delay-Based Inventory Control Using Decision- Making Tableaux, International Journal of Production Research, 48(18), 5497-5521. available on-line

Sipahi, R., Delice, I.I., 2010, Stability of Inventory Dynamics in Supply Chains with Three Delays, International Journal of Production Economics, 123(1), 107-117. available on-line

Sipahi, R., Delice, I.I., 2009, Extraction of 3D Stability Switching Hypersurfaces of a Time Delay System with Multiple Fixed Delays, Automatica, 45(6), 1449-1454. available on-line

Sipahi, R., Lammer, S., Niculescu, S.-I., Helbing, D., 2009, On Stability Problems of Supply Networks Constrained with Transport Delay, ASME Journal of Dynamic Systems, Measurement & Control, 131, 021005, 1-9. available on-line

 

Selected Most-Cited Publications

Sipahi, R., Delice, I.I., 2011, Advanced Clustering with Frequency Sweeping Methodology for the Stability Analysis of Multiple Time-Delay Systems, IEEE Transactions on Automatic Control, 56(2), 467-472. - received 19 non-self citations

Sipahi, R., Niculescu, S.-I., Abdallah, C.T., Michiels, W., Gu, K., 2011, Stability and Stabilization of Systems with Time Delay, Limitations and opportunities, invited article, IEEE Control Systems Magazine, 31(1), pp. 38-65. available on-line - received 97 non-self citations

Sipahi, R., Delice, I.I., 2010, Stability of Inventory Dynamics in Supply Chains with Three Delays, International Journal of Production Economics, 123(1), 107-117. - received 19 non-self citations

Sipahi, R., Delice, I.I., 2009, Extraction of 3D Stability Switching Hypersurfaces of a Time Delay System with Multiple Fixed Delays, Automatica, 45(6), 1449-1454. - received 16 non-self citations

Fazelinia, H., Sipahi, R., Olgac, N., 2007, Stability Robustness Analysis of Multiple Time-Delayed Systems Using "Building Block" Concept, IEEE Transactions on Automatic Control, 52(5), 799-810. available on-line - received 43 non-self citations

Sipahi, R., Olgac, N., 2006, A Unique Methodology for the Stability Robustness of Multiple Time Delay Systems, Systems & Control Letters, 55(10), 819-825. available on-line - received 32 non-self citations

Olgac, N., Sipahi, R., 2005, A Unique Methodology for Chatter Stability Mapping in Simultaneous Machining, ASME Journal of Manufacturing Science and Engineering, 127(4), 791-800.
- received 29 non-self citations

Olgac, N., Ergenc, A.F., Sipahi, R., 2005, "Delay Scheduling": A New Concept for Stabilization in Multiple Delay Systems, Journal of Vibration and Control, 11(9), 1159-1172.- received 24 non-self citations

Olgac, N., Ergenc, A.F., Sipahi, R., 2006, Errata "Delay scheduling": A New Concept for Stabilization in Multiple Delay Systems (vol 11, pg 1159, 2005), Journal of Vibration and Control, 12(2), 213-213.

Sipahi, R., Olgac, N., 2005, Complete Stability Robustness of Third-order LTI Multiple Time-Delay Systems, Automatica, 41(8), 1413-1422.- received 50 non-self citations

Olgac, N., Sipahi, R., 2004, A Practical Method for Analyzing the Stability of Neutral Type LTI-Time Delayed Systems, Automatica, 40(5), 847-853.- received 38 non-self citations

Olgac, N., Sipahi, R., 2002, An Exact Method for the Stability Analysis of Time Delayed Linear Time-invariant (LTI) Systems, IEEE Transactions on Automatic Control, 47(5), 793-797.
- received 226 non-self citations

 

Selected Chapters / Edited Volumes / Books

Qiao, W., Sipahi, R., Graph Laplacian Design of a LTI Consensus System for the Largest Delay Margin: Case Studies, chapter in Delay Systems from Theory to Numerics in Applications, Vyhlidal, T., Lafay, J.-F., Sipahi, R. (Eds.), pp. 101-112, in Advances in Dynamics and Delays, Springer-Verlag, 2013.

Qiao, W., Sipahi, R., Dependence of delay margin on network topology: Single delay case, chapter in Time Delay Systems - Methods, Applications and New Trends,Sipahi, R., Vyhlidal, T., Niculescu, S.-I., Pepe, P. (Eds.), pp. 395-405, Springer-Verlag, 2012.

Vyhlidal, T., Lafay, J.-F., Sipahi, R. (Eds.), 2013, Delay Systems from Theory to Numerics in Applications, edited volume, in Advances in Dynamics and Delays, Springer-Verlag, ~ 400 pages, October 2013. According to the statistics from Springer Verlag,24,827 times chapter downloads were recorded from this edited volume from publication to June 2015.

Sipahi, R., Vyhlidal, T., Niculescu, S.-I., Pepe, P. (Eds.), 2012, Time Delay Systems - Methods, Applications and New Trends, edited volume, Lecture Notes in Control and Information Sciences (LNCIS), Springer-Verlag, approximately 470 pages. According to the statistics from Springer Verlag,23,160 times chapter downloads were recorded from this edited volume from publication to June 2015.

Loiseau, J.-J., Niculescu, S.-I., Michiels, W., Sipahi, R. (Eds.), 2009, Topics in Time Delay Systems Analysis, Algorithms, and Control, edited volume, approximately 450 pages, Lecture Notes in Control and Information Sciences, Springer-Verlag. According to the statistics from Springer Verlag,18,336 times chapter downloads were recorded from this edited volume from publication to June 2015.

Sipahi R., Delice, I.I., 2009, Inventory Dynamics Models of Supply Chains with Delays; System-Level Connection & Stability, chapter in Topics in Time-Delay Systems: Analysis, Algorithms and Control in Lecture Notes in Control and Information Sciences, Springer-Verlag, Editors: Loiseau, J.-J., Niculescu, S.-I., Michiels, W., Sipahi, R.

Sipahi, R. 2008, Stability Analysis of LTI Multiple Time Delay Systems - Cluster Treatment of Characteristic Roots, book, VDM Verlag Dr. Muller, Germany.


Selected Invited Talks

Byun, L., Sipahi, R., Delay as a Parameter in Controller Design: 1st Order LTI Systems invited talk at the International Workshop  on “Low-Order Controllers In Dynamical Systems,” – Sponsored by CNRS – French National Scientific Research Center, organized at SUPELEC, Gif-sur-Yvette, France, November 20-22, 2012.

Sipahi, R., Effects of Delays to Dynamical Behavior; Applications and Insights from Linear Systems, plenary talk at IEEE International Conference on Electrical Engineering, Computing Science and Automatic Control, hosted and sponsored by CINVESTAV Mexican National Research Center, Mexico City, Mexico. September, 2012.

Sipahi, R., Techniques to Calculate the Critical Eigenvalues of LTI Systems with Delays, full day tutorial to faculty, researchers, and graduate students at IEEE International Conference on Electrical Engineering, Computing Science and Automatic Control, hosted and sponsored by CINVESTAV Mexican National Research Center, Mexico City, Mexico. September, 2012

Invited talk at the Department of Mechanical and Aerospace Engineering, Polytechnic Institute of New York University (NYU-Poly) on November, 2011.

One of the four panelists invited by the MathWorks to the panel entitled Hands-on Experiments and Low Cost Hardware Solutions held at 2011 American Control Conference, San Francisco, CA.

Qiao, W., Sipahi, R., Creating Delay-Tolerant Networked Dynamical Systems via Designing the Network Graphs, in invited session “Evolving Dynamical Networks Part II”, presented at SIAM (Society of Industrial and Mathematics Society) Conference on Applications of Dynamical Systems, May 22, 2011, Snowbird, Utah..

Sipahi, R., Delay-Independent Stability and Delay-Tolerant Network Design, invited talk at Ecole Centrale de Lille. Host: Profs. Jean-Pierre Richard and Laurentiu Hetel (INRIA, CNRS), May 17, 2011.

Sipahi, R., Delay-Tolerant Networks, Design, Analysis, Synthesis, invited talk at Max Planck Institute for Mathematics in the Sciences, Leipzig. Host: Dr. Fatihcan Atay, May 13, 2011.

Sipahi, R., Delay-Independent Stability and Applications to Supply Chains, invited talk at IRCCYN (CNRS) Ecole Centrale de Nantes. Host: Prof. Jean-Jacques Loiseau, May 12, 2011.

Sipahi, R., Delay-Independent Stability and Delay-Tolerant Network Design, invited talk at SUPELEC and INRIA. Host: Profs. Catherine Bonnet and Silviu-Iulian Niculescu, May 10, 2011.

Sipahi, R., Stability of Systems with Multiple Delays: Advanced Clustering with Frequency Sweeping Methodology, invited talk at US Air Force Research Labs, New Mexico, 2009.


Selected Recent Peer-Reviewed Conference Publications

Ramirez, A., Sipahi, R., Mondie, S., Garrido, R., Design of Maximum Decay Rate for SISO Systems with Delayed Output Feedback Using Elimination Theory, 2015 IFAC Workshop on Time Delay Systems, Ann Arbor, MI.

Sipahi, R., Kucera, V., Vyhlidal, T., Stability Analysis and Control Design of a Vibration Control System with Uncertain and Tunable Delays, invited paper, 2015 IFAC Workshop on Time Delay Systems, Ann Arbor, MI.

Sipahi, R., Atay, F.M., Niculescu, S.-I., Stability Analysis of a Constant Time-Headway Driving Strategy with Driver Memory Effects Modeled with Distributed Delays, invited paper, 2015 IFAC Workshop on Time Delay Systems, Ann Arbor, MI.

Nia, P.M., Sipahi, R., Delay-Margin Design Approach on a DC Motor Speed Control System with a Single Plant Delay, American Control Conference, Portland, Oregon, June 4-6, 2014.

Nia, P.M., Sipahi, R., Delay-Independent Stable Set-Point Tracking in a LTI Networked Control System with Two Uncertain Delays; Design and Experiments, American Control Conference, Portland, Oregon, June 4-6, 2014.

Qiao, W., Atay, F. M., Sipahi, R., Graph Laplacian design for fast consensus of a LTI system with heterogeneous agent couplings and homogeneous inter-agent delays, ASME Dynamic Systems and Control Conference, Palo Alto, CA, 2013.

Qiao, W., Sipahi, R., The Largest Achievable Delay Margin of a Class of Coupled LTI Systems Synthesized by Graph Operations, IFAC Workshop on Time Delay Systems, Boston, MA, June 22-24, 2012. 

Nia, P.M., Sipahi, R., Analytical Boundaries of Controller Gains for Delay-independent Stability of LTI Systems with Single Output Delay, IFAC Workshop on Time Delay Systems, Boston, MA, June 22-24, 2012. 

R. Sipahi, Model-Free Approach to Controlling Nonlinear Systems with Output Delays, invited paper to “Control of Nonlinear and Time-Varying Delay Systems” session at American Control Conference, pp. 3913-3918, Montreal, Canada, June 27-29, 2012.

Qiao, W., Sipahi, R., Responsible-Eigenvalue Control for Creating Autonomy in Coupled Systems with Delays, invited session "Analysis of Complex Networked Dynamical Systems", ASME Dynamic Systems and Control Conference, Arlington, Virginia, October 31 - November 2, 2011.

Nia, P.M., Sipahi, R., An Algebraic Approach to Design Observers for Delay-Independent Stability of Single-Delayed Systems, American Control Conference, San Francisco, June 29-July 1, 2011.

Qiao, W., Sipahi, R., Responsible Eigenvalue Approach for Stability Analysis of a Single-Delay Large-Scale System with Random Coupling Strengths, ASME Dynamic Systems and Control Conference, Cambridge, MA, September 2010.

Qiao, W., Sipahi, R., Dependence of Delay Margin on Network Topology: Single Delay Case, IFAC 9th Workshop on Time Delay Systems, Prague, Czech Republic, June 2010.

Delice, I.I., Sipahi, R., Controller Design for Delay-Independent Stability of Multiple Time-Delay Systems via Descartes Rule of Signs, IFAC 9th Workshop on Time Delay Systems, Prague, Czech Republic, June 2010.

Delice, I.I., Sipahi, R., Advanced Clustering with Frequency Sweeping (ACFS) Methodology for the Stability Analysis of Multiple Time Delay Systems, American Control Conference, Baltimore, June-July 2010. Mr. Delice received the Best Session Presentation Award.

Delice, I.I., Sipahi, R., Exact Upper and Lower Bounds of Crossing Frequency Set and Delay Independent Stability Test for Multiple Time Delayed Systems, IFAC 8th Workshop on Time Delay Systems, Sinaia, Romania, September 2009.

Delice, I.I., Sipahi, R., Identifying Stability vs. Instability of Inventory Dynamics of Supply Chains in Presence of Delays, ASME IMECE, Boston, 2008.

Sipahi, R., Acar, A., Stability Analysis of Three-Agent Consensus Dynamics with Fixed Topology and Three Non-Identical Delays, ASME Dynamic Systems and Control Conference, Ann Arbor, Michigan, October 2008.