Publications

Selected Journal Articles

“Trajectory Tracking of Cart-Pendulum Dynamics Using Multiple Time Delayed Feedback”, ( M. E. Cavdaroglu, N. Olgac), IET Control Theory and Applications, in print, 2008.

 “Extended Kronecker Summation for Determining the Kernel and Offspring of LTI Systems with Multiple Delays”,  (A. Ergenc, N. Olgac, H. Fazelinia), SIAM, J. of Control and Optimization,  Vol. 46(1), pp. 143-155, 2007.

“Dynamics and Stability of Multi-flute Variable-Pitch Milling”, (N. Olgac, R. Sipahi), J. of Vibration and Control, 13(7): 1031–1043, 2007.

“ 'Delay Scheduling' an Unconventional Use of Time Delay as a Stabilizing Tool in Trajectory Tracking”,  (N. Olgac, R. Sipahi, A. Ergenc),  Mechatronics, Vol. 17, pp. 199-206, 2007.

“New Perspective in Process Optimization of Variable Pitch Milling”, (H. Fazelinia, N. Olgac),  Int. J. of Materials and Products Technology, in print, 2007.

“Generalization of Cluster Treatment of Characteristic Roots for Robust Stability of Multiple Time Delayed Systems”, (R. Sipahi, H. Fazelinia, N. Olgac), accepted with minor revision, Int. J. of Robust and Nonlinear Control, 2007.

“Kernel and Offspring Concepts for the Stability Robustness of Multiple Delay Systems”, (R. Sipahi, N. Olgac),  ASME J. of Dynamic Systems, Measurement and Control, 2007.

“An Actively Controlled Harmonic Force Generator”, (O. Mikus, N. Olgac, R. Sipahi), accepted, Control Engineering Practice, 2007.

“Stability Analysis of Multiple Time Delayed Systems Using ‘Building Block’ Concept”, (H. Fazelinia, R. Sipahi, N. Olgac),  IEEE, T. on Automatic Control, vol. 52, no. 5, pp. 799-810, 2007.

“A unique methodology for the stability robustness of multiple time delay systems”, (R. Sipahi, N. Olgac), Systems and Control Letters, Vol. 55, pp. 819-825, 2006.

“Stability Robustness of Retarded LTI Systems with Single Delay and Exhaustive Determinations of Their Imaginary Spectra”,  (R. Sipahi, N. Olgac), SIAM, J. Control and Optimization, 45(5), pp. 1680-1696, 2006.

 “Complete Stability Analysis of Neutral Type First Order - Two Time Delay Systems with Cross-Talking Delays, (R. Sipahi, N. Olgac), SIAM, J. of Control and Optimization, 45(3), pp. 957-971, 2006.

“An improved Procedure for a Critical Step of the Direct Method”, (N. Olgac, R. Sipahi), IEEE, T. on Automatic Control, (51) 7, pp. 1164-1166, 2006.

“Delay Scheduling: A New Concept for Stabilization in Multiple Delay Systems”, (N. Olgac, A. Ergenc, R. Sipahi), J. of Vibration and Control, Vol. 11, 9, pp. 1159-1172, 2005.

“The Cluster Treatment of Characteristic Roots and the Neutral Type Time-Delayed Systems”, (N. Olgac, R. Sipahi), ASME J. of Dynamic Systems, Measurement and Control, Vol. 127, 88-97,  2005.

“Complete Stability Robustness of Third Order LTI, Multiple Time Delay Systems”, (R. Sipahi, N. Olgac), Automatica, Vol. 41, pp.  1413-1422, 2005.

"A Unique Methodology for Chatter Stability Mapping for Simultaneous Machining”, (N. Olgac, R. Sipahi), ASME J. of Manufacturing Science and Engineering, 127(4), pp. 791-800, 2005.

“A Practical Method for Analyzing the Stability of Neutral Type LTI Time Delayed Systems”, (N. Olgac, R. Sipahi), Automatica, Vol. 40, p. 847-853, May  2004.

On Micro Injection in Biological Cells:

“Micro-dynamics of the Piezo-driven Pipettes in ICSI”, (K. Ediz, N. Olgac), IEEE Tran. On Biomedical Engineering, Vol. 51, No. 07, 1262-1269, July 2004.

"Effect of Mercury Column on the Micro-dynamics of the Piezo-driven Pipettes”, (K. Ediz, N. Olgac), ASME J. of Biomechanical Engineering,  Vol. 127, No. 3, 531-535,  2005.

“A New Optical Sensor for Monitoring the Micro-pipette Motion”, (Ali F. Ergenc, N. Olgac), IEEE, J. of Information Technology in Biomedicine, Vol. 10, No. 4, 775-781. 2006.

“New technology for Cellular Piercing: Rotationally Oscillating Micro-injector, Description and Validation Tests”, (A. Ergenc, N. Olgac), accepted, J. Biomedical Microdevices, 2007.

Recent Conference Articles

 “Delay Decoupling Control, A Novel Method for Systems with Multiple Delays”, M. Poursina, N. Olgac, IFAC-TDS 07, Nantes, France.

“Exact Stability Analysis of Neutral Systems with Cross-Talking elays”, (N. Olgac, T. Vhylidal, R. Sipahi),  6th IFAC Workshop on TDS, July 2006, L’Aquila, Italy.

“Stability Analysis of Multiple Time Delay Systems Using ‘Building Block’ Concept”, (H. Fazelinia, R. Sipahi, N. Olgac), ACC 2006,  Minneapolis, MN, June 2006. 

“Stability Map of Systems with Three Independent Delays”, (R. Sipahi, N. Olgac), ACC 2006, Minneapolis, MN, June 2006.

“A Unique Mathematical Tool Deployed on Variable-Pitch Milling”, (H. Fazelinia, N. Olgac), NSF-DMI Design, Service, and Manufacturing Grantees and Research Conference, St. Louis, 2006.

“Chatter Prediction for Variable-Pitch Milling”, (N. Olgac, R. Sipahi), ASME – IMECE 2006, Chicago.

 “A New Perspective in Process Optimization in Variable-Pitch Milling”,  (H. Fazelinia, N. Olgac), ASME – IMECE 2006, Chicago.

 “A New Optical Sensor for Non-contact Monitoring of Micro-pipette Motion”, (A. F. Ergenc, N. Olgac), ASME – IMECE 2006, Chicago.

 “Kronecker Summation Method and Multiple Delay Systems”, (A.F. EWrgenc, N. Olgac, H. Fazelinia), IEEE – CDC, 2006, San Diego.

“Chatter Stability Mapping for Simultaneous Machining”, (N. Olgac, R. Sipahi), ASME, IMECE 2005, paper no. 79116, Orlando, FL. Nov. 2005.

“Kernel and Offspring Concepts for the Stability Robustness of Multiple Time Delayed Systems”, (R. Sipahi, N. Olgac), ASME DETC 2005, paper no. 84470, Long Beach, CA, Sept. 2005.

“A Comparative Survey in Determining the Imaginary Characteristic Roots of LTI Time Delayed Systems”, (R. Sipahi, N. Olgac), IFAC World Congress, Prague, Czech Republic, Aug. 2005.

“Micro-pipette Motion Detection by Using Optical Fiber Sensors”, (Ali F. Ergenc, N. Olgac), 31st North East Bioengineering Conference, Hoboken, N.J., 2005.

 “Complete Stability Map of Neutral Type, First Order, Two Time Delay Systems”, (Sipahi, R., Olgac, N., Breda, D.) ,  CDC-ECC-2005, Sevilla,  Spain, Dec. 2005.

“Cluster Treatment of Characteristic Roots for Robust Stability of Multiple Time Delayed Systems”, (R. Sipahi, N. Olgac),  The Sixteenth International Workshop on Operator Theory and Applications (IWOTA), Storrs, CT, July, 2005.

“A Novel Stability Study on Multiple Time Delayed Systems (MTDS) Using the Root Clusterig Paradigm “, American Controls Conference, Boston, June 2004.  CD Paper # FrP08.2,   p. 5422-5427

“Feedback Time Delay as a Stabilizing Tool in Trajectory Tracking, Analysis and Experiments”, (N. Olgac, R. Sipahi, A. Ergenc), American Controls Conference, Boston, June 2004. CD Paper # FrP08.6,  p. 5443-5448.

“Delay Scheduling-Use of Time Delay as a Stabilizing Tool in Trajectory Tracking, Experimental Validation”, (N. Olgac, R. Sipahi, A. Ergenc), Mechatronics 2004, Ankara, Turkey, Aug. 2004.  CD p. 731-742.

“Complete Stability Map of Third Order LTI, Multiple Time Delay Systems”, (R. Sipahi, N. Olgac), 5th IFAC Workshop on TDS, Sept. 2004, Leuven, Belgium.

“The Cluster Treatment of Characteristic Roots and the Neutral Type Time-Delayed Systems”,  (N. Olgac , R. Sipahi), ASME-IMECE 04, Los Angeles, November 2004. Paper # IMECE2004-59188

 

 

 

 

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Last Updated on: Wednesday, May 7, 2008