## Journal Articles (Last 5 years)

"Deployment of time-delayed integral control for suppressing thermoacoustic instabilities", (U. Zalluhoglu, N. Olgac), Journal of Guidance, Control and Dynamics, accessed September 29, 2015. DOI: 10.2514/1.G001362

"Combination of sign inverting and delay scheduling control concepts for multiple-delay dynamics", (Q. Gao, A. S. Kammer, U. Zalluhoglu, N. Olgac), Systems and Control Letters, 77, pp. 55-62, 2015.

"Parametric investigation of thermoacoustic instability (TAI) in a rijke tube: a time-delay perspective", (N. Olgac, R. Cepeda-Gomez, U. Zalluhoglu, A. S. Kammer), International Journal of Spray and Combustion Dynamics, 7 (1), pp. 39-68, 2015.

"Optimal sign inverting control for time-delayed systems, a concept study with experiments", (Q. Gao, N. Olgac), International Journal of Control, 88 (1), pp. 113-122, 2015. DOI: 10.1080/00207179.2014.941409

"A New Perspective in Designing Delayed Feedback Control for Thermo-Acoustic Instabilities (TAI)", (N. Olgac, U. Zalluhoglu, A. S. Kammer), Combustion Science and Technology, article in press, 2014. DOI: 10.1080/00102202.2014.960924

"Stability of formation control using a consensus protocol under directed communications with two time delays and delay scheduling", (R. Cepeda-Gomez, N. Olgac), *International Journal of Systems Science*, article in press, 2014. DOI: 10.1080/00207721.2014.886745

"Delayed resonator with acceleration feedback–Complete stability analysis by spectral methods and vibration absorber design", (T. Vyhlidal, N. Olgac, V. Kucera) *Journal of Sound and Vibration*, **333** (25), pp. 6781-6795, 2014. DOI: 10.1016/j.jsv.2014.08.002

"On blade/casing rub problems in turbomachinery: An efficient delayed differential equation approach", (N. Olgac, U. Zalluhoglu, A. S. Kammer), *Journal of Sound and Vibration*, **333** (24), pp. 6662-6675, 2014. DOI: 10.1016/j.jsv.2014.06.038

"Predicting Thermoacoustic Instability: A Novel Analytical Approach and Its Experimental Validation", (N. Olgac, U. Zalluhoglu, A. S. Kammer), Journal of Propulsion and Power, 30 (4), pp. 1005-1015, 2014. DOI: 10.2514/1.B35162

"Stabilisation of open-loop unstable plants under feedback control with distributed delays", (N. Olgac, A. S. Kammer), *IET Control Theory & Applications*, **8** (10), pp. 813-820, 2014. DOI: 10.1049/iet-cta.2013.0652

"A test platform for cognitive delays: target tracking problem with multiple time-delayed feedback control", (Q. Gao, R. Cepeda-Gomez, N. Olgac), *International Journal of Dynamics and Control*, **2** (1), pp. 77-85, 2014. DOI: 10.1007/s40435-014-0077-6

"Investigation of Local Stability Transitions in the Spectral Delay Space and Delay Space", ( ), *Journal of Dynamic Systems, Measurement, and Control*, **136** (5), paper no: DS-13-1425, 2014. DOI: 10.1115/1.4027171

“A consensus protocol under directed communications with two time delays and delay scheduling”, (R. Cepeda-Gomez, N. Olgac), *International Journal of Control*, **87** (2), pp. 291-300, 2014. DOI: 10.1080/00207179.2013.829605

“Exact stability analysis of second-order leaderless and leader-follower consensus protocols with rationally-independent multiple time delays”, (R. Cepeda-Gomez, N. Olgac), *Systems and Control Letters*, **62** (6), pp. 482-495, 2013. DOI: 10.1016/j.sysconle.2013.02.011

"An Adaptive Control Method for Ros-Drill Cellular Microinjector with Low-Resolution Encoder", (Z. Zhang, N. Olgac), *Journal of Medical Engineering*, **2013**, article ID 418068, 2013. DOI: 10.1155/2013/418068

"Adaptive gain scheduling for rotationally oscillating drill, with low–resolution feedback", (Z. Zhang, J. F. Diaz, N. Olgac), *International Journal of Mechatronics and Manufacturing Systems*, **6** (5), pp. 397-421, 2013. DOI: 10.1504/IJMMS.2013.058512

“Stability analysis for the group dynamics consensus with time delayed communications”, (R. Cepeda-Gomez, N. Olgac), *European Journal of Control*, **18** (5), pp. 456-468, 2012. DOI: 10.3166/EJC.18.456-468

“Swarm herding using a region holding sliding mode controller”, (M. Bacon, N. Olgac), *Journal of Vibration and Control*, **18** (7), pp. 1056-1066, 2012. DOI: 10.1177/1077546311411346

“Control of Antagonistic Swarm Dynamics via Lyapunov’s Method”, (D. A. Sierra, P. McCullough, E. Adams, N. Olgac), *Asian Journal of Control*, **14** (4), pp. 1-13, 2012. DOI: 10.1002/asjc.291

“Robust Region Tracking for Swarms via a Novel Utilization of Sliding Mode Control”, (M. Bacon, N. Olgac, R. Cepeda-Gomez), *Intelligent Control and Automation*, **3** (1), pp. 98-109, 2012. DOI: 10.4236/ica.2012.31012

“Consensus Analysis with Large and Multiple Communication Time Delays using Spectral Delay Space (SDS) Concept”, (R. Cepeda Gomez, N. Olgac), *International Journal of Control*, **84** (12), pp. 1996-2007, 2011. DOI: 10.1080/00207179.2011.631151

“Dynamic response of micropipettes during piezo-assisted intracytoplasmic sperm injection”, (M. Karzar-Jeddi, N. Olgac and T. Fan), *Physical Review*, **84** (4), 2011. 2011. DOI: 10.1103/PhysRevE.84.041908

“Application of Sliding Mode Control to Swarms under Conflict”, (R. Cepeda-Gomez; N. Olgac; D. A. Sierra), *IET Control Theory & Applications*, 5 (10), pp.1167–1175, 2011. DOI: 10.1049/iet-cta.2010.0201

“An Exact Method for the Stability Analysis of Linear Consensus Protocols with Time Delay”, (R. Cepeda-Gomez and N. Olgac), *IEEE Transactions on Automatic Control*, **56 **(7), pp: 1734–1740, 2011. DOI: 10.1109/TAC.2011.2152510

“Stability intricacies of two-delay linear systems in the presence of delay cross-talk”, (R. Sipahi, N. Olgac), *IET Control Theory and Applications*, **5** (8), pp. 990-998, 2011. DOI: 10.1049/iet-cta.2010.0162

“Exhaustive Stability Analysis in a Consensus System with Time Delay and Irregular Topologies”, (R. Cepeda Gomez, N. Olgac), *International Journal of Control*, **84** (4), pp. 746-757, 2011. DOI: 10.1080/00207179.2011.576272

“A Lyapunov Treatment of Swarm Coordination under Conflict”, (P. McCullough, M. Bacon, N. Olgac, D. A. Sierra, R. Cepeda-Gomez), *Journal of Vibration and Control*, **17** (5), pp. 641-650, 2011. DOI: 10.1177/1077546309360047

“Swarm Coordination under Conflict and Use of Enhanced Lyapunov Control”, (D. A. Sierra, P. McCullough, N. Olgac, E. Adams), *ASME Journal of Dynamic Systems, Measurements and Control*, **133** (2), paper no. 021004 (8pp), 2011. DOI: 10.1115/1.4003213

“Full State Feedback Control Design with Delay Scheduling for Cart-and-Pendulum Dynamics”, (N. Olgac, E. M. Cavdaroglu), *Mechatronics*, **21 **(1), pp. 38-47, 2011. DOI: 10.1016/j.mechatronics.2010.08.007

“A Stability Study on First Order Neutral Systems with Three Rationally Independent Time Delays”, (R. Sipahi, N. Olgac, D. Breda), *International Journal of Systems Science*, **41** (12), pp. 1445–1455, 2010. DOI: 10.1080/00207720903353625

“Geometric Characterization of Cell Membrane of Mouse Oocytes for ICSI", (J. Diaz, M. Karzar-Jeddi, N. Olgac, T. Fan, A. F. Ergenc), *ASME Journal of Biomechanical Engineering*, **132** (12), paper no. 121002 (6 pp), 2010. DOI: 10.1115/1.4002701

“Visual Feedback Automation for ICSI With Rotationally Oscillating Drill (Ros-Drill©)”, (J. Diaz, N. Olgac, M. Karzar-Jedi, T-H. Fan), *ASME Journal of Medical Devices*, **4** (2), paper no. 024502 (4 pp), 2010. DOI: 10.1115/1.4001865

Discussion on:“Stability Analysis of Time Delayed System with Coefficient Uncertainty and Time Delay Uncertainty”, (N. Olgac), *European Journal of Control*, 16 (1), pp. 14-15, 2010. DOI: 10.1016/S0947-3580(10)70612-9

## Recent Conference Papers (Last 5 years)

"Stability of Blade-Casing Interference in Turbomachinery and the Design Alternatives on Damping Characteristics", (N. Olgac, U. Zalluhoglu, A. S. Kammer), *ASME Dynamic Systems and Control Conference 2014*, San Antonio, TX.

"Stability and Control of a Thermoacoustic Device: The Rijke’s Tube", (N. Olgac, U. Zalluhoglu, A. S. Kammer), *ASME Dynamic Systems and Control Conference 2014*, San Antonio, TX.

"Sign inverting and Delay Scheduling Control concepts with multiple rationally independent delays", (Q. Gao, A. S. Kammer, U. Zalluhoglu, N. Olgac), *American Control Conference 2014*, Portland, OR.

"An Adaptive Control Method With Low-Resolution Encoder", (Z. Zhang, N. Olgac), *ASME Dynamic Systems and Control Conference 2013*, San Francisco, CA.

"Design and Stability Analysis of Delayed Resonator With Acceleration Feedback", (T. Vhylidal, N. Olgac, V. Kucera), *ASME Dynamic Systems and Control Conference 2013*, San Francisco, CA.

"Equivalency of Stability Transitions Between the SDS (Spectral Delay Space) and DS (Delay Space)", (Q. Gao, U. Zalluhoglu, N. Olgac), *ASME Dynamic Systems and Control Conference 2013*, San Francisco, CA. "**Conference Best Paper Award, in Theory**”. **“Student Best Paper Award finalist”.**

"Stability of a Second Order Leader-Follower Consensus Protocol With Partial Access to the Leader and Communication and Input Delays", (R. Cepeda-Gomez, N. Olgac), *ASME Dynamic Systems and Control Conference 2012*, Fort Lauderdale, FL.

"Exact stability analysis of second-order leader-follower consensus protocols with multiple time delays", (R. Cepeda-Gomez, N. Olgac), *IEEE Conference on Decision and Control 2012*, Maui, HI.

"Formation control based on a consensus protocol under directed communications with two time delays", (R. Cepeda-Gomez, N. Olgac), *American Control Conference 2012*, Montreal, QC, Canada.

"Exact stability analysis of a second-order leaderless consensus protocol with multiple communication and input delays", (R. Cepeda-Gomez, N. Olgac), *10th IFAC Workshop on Time Delay Systems, TDS-2012*, Boston, MA.

"The homocidal chauffeur problem with multiple time delayed feedback", (Q. Gao, R. Cepeda-Gomez, N. Olgac), *10th IFAC Workshop on Time Delay Systems, TDS-2012*, Boston, MA.

“Stability of a consensus protocol for second order agents with multiple time delays”, (R, Cepeda-Gomez, N. Olgac), *ASME Dynamic Systems and Control Conference 2011*, Arlington, VA.

“Adaptive Hybrid Control for Rotationally Oscillating Drill (Ros-drill©), Using A low-resolution Sensor”,(Z. Zhang, J. Diaz, N. Olgac), *ASME Dynamic Systems and Control Conference 2011*, Arlington, VA.

“Exact Stability Analysis of Second Order Linear Consensus Protocols with Time Delay”, (R. Cepeda-Gomez, N. Olgac), *IEEE Conference on Decision and Control 2011*, Orlando, FL.

“Exhaustive Stability Analysis in a Consensus System with Time Delay and Irregular Topologies”, (R. Cepeda-Gomez, N. Olgac), *American Control Conference 2011*, San Francisco, CA.

“Consensus of a Group of Second Order Agents with Switching Irregular Communication Topologies and Time-Delay”, (R. Cepeda-Gomez, N. Olgac), *IEEE Conference on Decision and Control 2010*, Atlanta, GA.

“Application of sliding mode control to swarms under conflict”, (R.C. Gomez, N. Olgac, D.S. Bueno), ASME – DSCC 2010, Boston.

“Robust Region-tracking Method for Multi-agent Systems Using Sliding Mode Control, (M. Bacon, N. Olgac), *ASME Dynamic Systems and Control Conference 2010*, Boston.

“Automated ICSI with Rotationally Oscillating Drill (Ros-Drill©) Using Visual Feedback”, (J. Diaz, M-K. Jeddi, N. Olgac, T-H Fan), *ASME Dynamic Systems and Control Conference 2010*, Boston.

“Stability of the Consensus of a Group of Second Order Agents with Time Delayed Communications”, (R. Cepeda-Gomez, N. Olgac), *ASME Dynamic Systems and Control Conference 2010*, Boston.

“Stability Analysis for a Consensus System of a Group of Second Order Dynamics with Time Delays”, (R. Cepeda-Gomez, N. Olgac), *9th IFAC Workshop on Time Delay Systems*, TDS 2010, Prague, Czech Rep., 2010.

“Full-State Feedback Control Design with Delay Scheduling for Cart-Pendulum Dynamics”, E. Cavdaroglu, N. Olgac), *8th* *IFAC Workshop on Time Delay Systems*, Sinaia, Romania, 2009.

“A Lyapunov Treatment of Swarm Coordination Under Conflict”, (P. McCullough, M. Bacon, N. Olgac, D. A. Sierra), *ASME Dynamic Systems and Control Conference 2009*, Hollywood, CA, 2009.

“On the Geometric Characteristics of Cell Membrane Using Rotationally Oscillating Drill (Ros-Drill©”, (J. Diaz, M-K. Jedi, N. Olgac, T-H Fan, A.F Ergenc), *ASME Dynamic Systems and Control Conference 2009*, Hollywood, CA, 2009.

“Swarm Coordination under Conflict and Use of Enhanced Lyapunov Control”, (D.A.Sierra, P. McCullough, N. Olgac, E. Adams), *ASME International Design Engineering Technical Conference 2009*, San Diego, 2009.

“Swarm Coordination under Conflict”, (D. A. Sierra, P. McCullough, E. Adams, N. Olgac), *American Control Conference* *2009*, St. Louis, pp. 1021-1026, 2009.

“Time Delayed Systems – A Research Loop from a Practical Problem to Novel Mathematics and Back to Practice”, *TOK 08*, Istanbul, Turkey, 2008.

“Full State Feedback Control Design for ‘Delay Scheduling’”, (E. Cavdaroglu, N. Olgac) – *ASME Dynamic Systems and Controls Conference*, Ann Arbor, MI, 2008.

“Robust Control for Multiple Delay Systems with Delay-Decouplability”, (K. Turkoglu, N. Olgac), *ASME Dynamic Systems and Controls Conference*, Ann Arbor, MI, 2008.

“Robust Control of Cart-Pendulum Dynamics against Uncertain Multiple Time Delays”, (E. Cavdaroglu, N. Olgac), *American Control Conference 2008*, Seattle, June 2008.

“Inverting Control, A New Strategy on Time Delayed Systems”, (A. Ergenc, H. Fazelinia, N. Olgac), *IFAC World Congress Seoul*, July 2008.

**Page updated on 11/27/2013**