# Yildiray Yildiz

## Assistant Professor

### Address:

Department of Mechanical EngineeringBilkent University

06800 Bilkent, Ankara

### Office:

EA 104### Phone:

+90 (312) 290-3065### E-mail:

### Biography:

Yildiray Yildiz is an Assistant Professor in Mechanical Engineering Department at Bilkent University. He received his Ph.D. in Mechanical Engineering with Mathematics minor at Massachusetts Institute of Technology in 2009. He worked at NASA Ames Research Center, employed by UC Santa Cruz, one year as a postdoctoral scholar and four years as an Associate Scientist, until he joined Bilkent University in 2014.Professor Yildiz is the recipient of an ASME best student paper award for his work on “Automotive Powertrain Control Problems Involving Time Delay: An Adaptive Control Approach” and a NASA Group Achievement Award “for outstanding technology development of the CAPIO system at the Vertical Motion Simulator supporting NASA's Green Aviation Initiative.” He has served in program committees for several conferences and is a reviewer for several journals. He was a member of the AIAA Guidance, Navigation and Control Technical Committee from 2010 through 2013. He has been an IEEE Conference Editorial Board Associate Editor since 2015 and an Associate Editor for IEEE Control Systems Magazine since 2016.

**PROSPECTIVE STUDENTS:**If you are interested, please send me a short email (yyildiz@bilkent.edu.tr) describing your research interests together with your CV. Undergraduates are also welcome. If you are a good programmer, please indicate that in your email (this is not a requirement).

**OPEN POSTDOCTORAL POSITIONS:**I seek candidates with strong programming skills together with an interest in reinforcement learning and game theory. I am particularly interested in candidates who can apply his/her computer skills on solving problems in prediction of the behavior of complex dynamical systems. Please contact me (yyildiz@bilkent.edu.tr) if you are interested.

### Education:

- Ph.D., Mechanical Engineering (Minor: Mathematics), Massachusetts Institute of Technology, 2009
- M.S., Mechatronics, Sabanci University, 2004
- B.S. (First Rank), Mechanical Engineering, Middle East Technical University, 2002

### Research:

Yildiray's research focus is on prediction and control of complex systems, whose dynamics are hard to describe, predict or control. In particular, Yildiray is interested in control theory, game theory and reinforcement learning, on the theory side, and their applications to aerospace, automotive and robotics fields, on the engineering side. He has conducted research in these areas in close collaboration with colleagues at MIT, University of Michigan and NASA.

__Group website__

__Google scholar__

__NASA news__### Member of:

### Selected Publications:

- Yücelen, T., Yildiz, Y., Sipahi, R., Yousefi, E., Nguyen, N. (2017). "Stability Limit of Human-in-the-Loop Model Reference Adaptive Control Architectures",
*International Journal of Control*(accepted) - Alan, A., Yildiz, Y., Poyraz, U. (2017). "Adaptive Pressure Control for Use in Variable Thrust Rocket Development",
*under review.* - Li, N., Oyler, D., Zhang, M., Yildiz, Y., Kolmanovsky, I., Girard, A. (2017). "Game-Theoretic Modeling of Driver and Vehicle Interactions for Verification and Validation of Autonomous Vehicle Control Systems",
*IEEE Transactions on Control Systems Technology*(accepted) - Hussain, H., Yildiz, Y., Matsutani, M., Annaswamy, A.M., Lavretsky, E. (2017). "Computable Delay Margins for Adaptive Systems with State Variables Accessible",
*IEEE Transactions on Automatic Control*(accepted) - Yildiz, Y., Unel, M. D. A.E. (2017). "Nonlinear Hierarchical Control of a Quad-Tilt-Wing UAV: An Adaptive Control Approach",
*International Journal of Adaptive Control and Signal Processing*(accepted) - Abidi, K., Yildiz, Y., Annaswamy, A.M. (2017). "Control of Uncertain Sampled-Data Systems: An Adaptive Posicast Control Approach",
*IEEE Transactions on Automatic Control*, v.62(5) p.2597-2602 - Musavi, N., Onural, D., Gunes, K., Yildiz, Y. (2016). "Unmanned Aircraft Systems Airspace Integration: A Game Theoretical Framework for Concept Evaluations",
*AIAA Journal of Guidance, Control and Dynamics*, v.40(1) p.96-109 - Abidi, K., Yildiz, Y., Korpe, B.E. (2016). "Explicit Time Delay Compensation in Teleoperation: An Adaptive Control Approach",
*International Journal of Robust and Nonlinear Control*(in press) - Acosta, D.M., Yildiz, Y., Craun, R.W., Beard, S.D., Leonard, M.W., Hardy, G.H., Weinstein, M. (2015). "Motion-Based Piloted Simulation Evaluation of a Control Allocation Technique to Recover from Pilot Induced Oscillations",
*AIAA Journal of Aircraft*, v.52(1) p.130-140

DOI: 10.2514/1.C032576 - Yildiz, Y., Brat, G., Agogino, A. (2014). "Predicting Pilot Behavior in Medium Scale Scenarios Using Game Theory and Reinforcement Learning",
*AIAA Journal of Guidance, Control and Dynamics*, v.37(4) p.1335-1343 - Backhaus, S., Bent, R., Bono, J., Lee, R., Tracey, B., Wolpert, D., Xie, D., Yildiz, Y. (2013). "Cyber-Physical Security: A Game Theory Model of Humans Interacting over Control Systems",
*IEEE Transactions on Smart Grid*, v.4(4) p.2320-2327 - Yildiz, Y., Annaswamy, A., Yanakiev, D., Kolmanovsky, I. (2011). "Spark Ignition Engine Idle Speed Control: An Adaptive Control Approach",
*IEEE Transactions on Control Systems Technology*, v.19(5) p.990-1002 - Yildiz, Y., Kolmanovsky, I. (2011). "Stability properties and cross coupling performance of the control allocation scheme CAPIO",
*Journal of Guidance, Control and Dynamics*, v.34(12) p.1190-1196 - Yildiz, Y., Annaswamy, A., Kolmanovsky, I., Yanakiev, D. (2010). "Adaptive Posicast Controller for Time-delay Systems with Relative Degree n*<=2",
*Automatica*, v.46(2) p.279-289 - Yildiz, Y., Annaswamy, A., Yanakiev, D., Kolmanovsky, I. (2010). "Spark Ignition Engine Fuel-to-Air Ratio Control: An Adaptive Control Approach",
*Control Engineering Practice*, v.18(12) p.1369-1378 - Yildiz, Y., Sabanovic, A., Abidi, K. (2007). "Sliding-Mode Neuro-Controller for Uncertain Systems",
*IEEE Transactions on Industrial Electronics*, v.54(3) p.1676-1685 - Yousefi, E., Demir, D.F., Sipahi, R., Yücelen, T., Yildiz, Y. (2017). "Effects Of Linear Filter On Stability And Performance Of Human-in-the-Loop Model Reference Adaptive Control Architecture",
*ASME Dynamic Systems and Controls Conference*(accepted) - Alan, A., Yildiz, Y., Poyraz, U. (2017). "Adaptive Pressure Control Experiment: Controller Design and Implementation",
*IEEE Conference on Control Technology and Applications*(accepted) - Yousefi, E., Yildiz, Y., Sipahi, R. Y. T. (2017). "The Effect of Remote-Signal Feedback Architecture on the Stability of Human-in-the-Loop Telerobotics in the Presence of Time-Delays",
*IEEE Conference on Control Technology and Applications*(accepted) - Yousefi, E., Yildiz, Y., Sipahi, R., Yucelen, T. (2017). "Stability Analysis of a Human-in-the-Loop Telerobotics System With Two Independent Time-Delays",
*IFAC World Congress*(accepted) - Dibaji, S.M., Yildiz, Y., Annaswamy, A., Chakrabortty A., (2017). "Delay-Aware Control Designs of Wide-Area Power Networks",
*IFAC World Congress*(accepted) - Tohidi, S.S., Yildiz, Y., Kolmanovsky, I.V. (2017). "Adaptive Control Allocation for Over-Actuated Systems with Actuator Saturation",
*IFAC World Congress*(accepted) - Alan, A., Yildiz, Y., Poyraz U., (2017). "Pressure Control of Cold Air Testing Plant with Delay Resistant Closed-loop Reference Model Adaptive Control",
*AIAA Science and Technology Forum and Exposition*(accepted) - Yucelen, T., Yildiz, Y., Sipahi, R. Y. E., Nguyen, N. . (2017). "Stability Analysis of Human-Adaptive Controller Interactions",
*AIAA Science and Technology Forum and Exposition*(accepted) - Oyler, D.W., Li, N., Zhang, M., Yildiz, Y., Girard, A., Kolmanovsky I. V., (2016). "Hierarchical Reasoning Game Theory Based Approach for Evaluation and Testing of Autonomous Vehicle Control Systems",
*IEEE Conference on Decision and Control*(accepted) - Oyler, D. Y. Y. G. A. K. I. (2016). "A Game Theoretical Model of Traffic with Multiple Interacting Drivers for Use in Autonomous Vehicle Development",
*American Control Conference*, July 6-8, Boston, USA (accepted) - Tohidi, S.S., Yildiz, Y., Kolmanovsky, I. (2016). "Fault Tolerant Control for Over-Actuated Systems: An Adaptive Correction Approach",
*American Control Conference*, July 6-8, Boston, USA (accepted) - Musavi, N., Tekelioğlu, K.B., Yildiz, Y., Gunes, K., Onural, D. (2016). "A Game Theoretical Modeling and Simulation Framework For The Integration Of UAS In To The NAS",
*AIAA Infotech @ Aerospace, AIAA Science and Technology Forum and Exposition*(Accepted) - Yildiz, Y., Unel, M., Demirel, A.E. (2015). "Adaptive Nonlinear Hierarchical Control of a Novel Quad Tilt-Wing UAV",
*European Control Conference*(accepted) - Alan, A., Yildiz, Y., Poyraz, U. (2015). "Gas Generator Pressure Control in Throttleable Ducted Rockets: A Classical and Adaptive Control Approach",
*AIAA/SAE/ASEE Joint Propulsion Conference*(accepted) - Abidi, K., Yildiz, Y. (2015). "On the Discrete Adaptive Posicast Controller",
*IFAC Workshop on Time-Delay Systems*(accepted) - Yildiz, Y., Annaswamy, A. (2015). "Robust Adaptive Posicast Controller",
*IFAC Workshop on Time-Delay Systems*(accepted) - Craun, R.W., Acosta, D.M., Beard, S.D., Leonard, M.W., Hardy, G.H., Weinstein, M., Yildiz, Y. (2013). "Motion-Based Piloted Simulation Evaluation of a Control Allocation Technique to Recover from Pilot Induced Oscillations",
*AIAA Guidance, Navigation, and Control (GNC) Conference*(AIAA 2013-4926) - Yildiz, Y., Brat, G., A. Agogino, (2013). "Predicting Pilot Behavior in Medium Scale Scenarios Using Game Theory and Reinforcement Learning",
*AIAA Modeling and Simulation Technologies Conference*(AIAA 2013-4908) - Yildiz, Y., Brat, G., Lee, R. (2012). "Using Game Theoretic Models to Predict Pilot Behavior in NextGen Merging and Landing Scenario," ",
*AIAA Modeling and Simulation Technologies Conference*(AIAA Paper 2012-4487) - Yildiz, Y., Kolmanovsky, I. (2011). "A Control Allocation System for Automatic Detection and Compensation of Phase Shift Due To Actuator Rate Limiting",
*American Control Conference*p.444 - 449 - Abidi, K., Yildiz, Y. (2011). "Discrete-Time Adaptive Posicast Controller for Uncertain Time-Delay Systems",
*AIAA Guidance, Navigation, and Control Conference,*(AIAA Paper 2011-6442) - Yildiz, Y. (2011). "The Effect of Explicit Adaptive Time Delay Compensation on Time Delay Margin",
*AIAA Guidance, Navigation, and Control Conference*(AIAA Paper 2011-6440) - Yildiz, Y., Kolmanovsky, I. (2010). "A Control Allocation Technique to Recover From Pilot Induced Oscillations (CAPIO) Due To Actuator Rate Limiting",
*American Control Conference*p.516-523 - Yildiz, Y., Kolmanovsky, I. (2010). "Stability properties and cross coupling performance of the control allocation scheme CAPIO",
*AIAA Infotech@Aerospace*(AIAA Paper 2010-347) - Yildiz, Y. (2010). "Adaptive Control For Time Delay Systems Applied To Flight Control",
*AIAA Guidance, Navigation, and Control Conference*(AIAA Paper 2010-7576) - Yildiz, Y., Kolmanovsky, I. (2010). "Implementation of CAPIO for Composite Adaptive Control of Cross-Coupled Unstable Aircraft",
*AIAA Infotech@Aerospace*(AIAA Paper 2011-1460) - Yildiz, Y., Annaswamy, A., Yanakiev, D., Kolmanovsky, I. (2008). "Adaptive Air Fuel Ratio Control for Internal Combustion Engines",
*American Control Conference*p.2058-2063 - Yildiz, Y., Annaswamy, A., Yanakiev, D., Kolmanovsky, I. (2008). "Automotive Powertrain Control Problems Involving Time Delay: An Adaptive Control Approach",
*ASME Dynamic Systems and Control Conference (BEST STUDENT PAPER AWARD)*p.1421-1428 - Yildiz, Y., Annaswamy, A., Yanakiev, D., Kolmanovsky, I. (2007). "Adaptive Idle Speed Control for Internal Combustion Engines",
*American Control Conference*p.3700-3705 - Acosta, D., Yildiz, Y., Klyde, D. (2014). "Avoiding Pilot-Induced Oscillations in Energy-Efficient Aircraft Designs",
*The Impact of Control Technology, IEEE Control Systems Society*