• Cumulative List of Publications (in no particular order) ... please seek the right references ... 
    • Controlled Autoignition for HCCI Engine:
    3. "Steady-State Multiplicity and Stability of Thermal Equilibria in Homogeneous Charge Compression Ignition (HCCI) Engines," C. J. Chiang and A. G. Stefanopoulou, in IEEE Proceedings of 2004 Conference in Decision and Control.," ( pdf )

    2. "A Mean-Value Model for Control of Homogeneous Charge Compression Ignition (HCCI) Engines ," ( pdf ) D. J. Rausen, A. G. Stefanopoulou, J-M. Kang, J. A. Eng, T-W. Kuo, in IEEE Proceedings of 2004 American Control Conference, 2004.

    1. “Control of charge dilution in turbocharged diesel engines via exhaust valve timing,” H. Yilmaz, A. G. Stefanopoulou,  to appear in the ASME Journal of Dynamic Systems Measurement and Control also in IEEE Proc. of American Control Conf, 2003

    Fuel Cells:

    [22] B. A. McCain, A. G. Stefanopoulou, Order Reduction for a Control-Oriented Model of the Water Dynamics in Fuel Cells, Proc 4th International Conf on Fuel Cell Science, Engr and Technology. FUELCELL2006-97075.

    [21] B. A. McCain et al, A Study towards Minimum Spatial Discretization of a Fuel Cell Dynamics Model, Proc  2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006-14509

    20.  “Control and Coordination of Air Compressor and Voltage Converter in Load-Following Fuel Cells,” K.-W. Suh, A. G. Stefanopoulou, International Journal of Energy Research, (in press) vol 29, issue 11, pp xxx-xx, Sept, 2005. also in Proceedings of 13th Mediterranean Conference on Control and Automation (MED'05), June 2005

    19. “Analysis, Modeling, and Validation for the Thermal Dynamics of a Polymer Electrolyte Membrane Fuel Cell Sytems,” E. A. Muller, A. G. Stefanopoulou, ASME Journal of Fuel Cell Science and Technology, accepted. also in  Proceedings of the ASME 3rd International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL2005-74050, May 2005

    18. “Dynamics, Optimization and Control of a Fuel Cell Based Combined Heat Power (CHP) System for Shipboard Applications” V. Tsourapas, A. G. Stefanopoulou, J. Sun, in Proceedings American Control Conference, ThA08.1, June 2005

    17. “Model based detection of hydrogen leaks in a fuel cell stack,” A. Ingimundarson, A. G. Stefanopoulou, D. McKay, Proceedings of the 44th IEEE Conference on Decision and Control, Dec. 2005, Seville, Spain

    16. “Constraint Management in Fuel Cells: A Fast Reference Governor Approach,” A. Vahidi, I. V. Kolmanovsky, A. G. Stefanopoulou, in Proceedings American Control Conference, FrA14.4 , June 2005

    15. “Modeling, Parameter Identification, and Validation of Water Dynamics for a Fuel Cell Stack,” W. T. Ott, D. A. McKay, A.G. Stefanopoulou, Proceedings of 2005 ASME International Mechanical Engineering Congress & Exposition, Nov 05, IMECE 2005-81484.

    14. Control of Fuel Cell Power Systems: Principles, Modeling, Analysis and Feedback Design, Series : Advances in Industrial Control , 2004, XVII, 161 p. 111 illus., Hardcover, ISBN: 1-85233-816-4

    13. "Mechatronics in Fuel Cell Systems", Anna G. Stefanopoulou, (Pleanary talk via request and paper) in Proceedings of the International Federation of Control, Symposium in Mechatronics, Sydney, Sept 2004.

    12. “Modeling and Dynamics of a Fuel Cell Combined Heat Power System for Marine Applications,” Vasilis Tsourapas, Jing Sun, Anna Stefanopoulou, IASME Transactions, 2(1), pp.288-293, April 2004 (pdf).

    11. "Fuel Cell APU for Silent Watch and Mild Electrification of a Medium Tactical Truck", Zoran Filipi, Loucas Louca, Anna Stefanopoulou, Jay Pukrushpan, Burit Kittirungsi and Huei Peng, SAE 2004-01-1477 (pdf presentation)

    10. "Parameterization and Validation of a Lumped Parameter Diffusion Model for Fuel Cell Stack Membrane Humidity
    Estimation" ( pdf ) Denise McKay, Anna Stefanopoulou, in IEEE Proceedings of 2004 American Control Conference, 2004.

    9. “Model Predictive Control for Starvation Prevention in a Hybrid Fuel Cell System,” ( pdf ) A. Vahidi, A.G. Stefanopoulou, and H. Peng, in IEEE Proceedings of 2004 American Control Conference, 2004.

    8.    “ Controlling Fuel Cell Breathing ,” J.T. Pukrushpan, A.G. Stefanopoulou, H. Peng, in Control Systems Magazine, IEEE Control Systems Magazine, 24(2) pp30-46, April, 2004

    7. “ Simulation and Analysis of Transient Fuel Cell System Performance based on a dynamic reactant flow model ,” Jay Pukrushpan, Anna Stefanopoulou, Huei Peng in the 2002 IMECE conference and a longer journal version in  “Modeling and Analysis of Fuel Cell Reactant Flow for Automotive Applications,” J.T. Pukrushpan, H. Peng, A.G. Stefanopoulou, in Journal of Dynamic Systems, Measurement and Control, 126 (1),  pp. 14-25, March 2004.

    6.    “ Dynamics and Control of Low and High Pressure Fuel Cells ,” S. Gelfi, J. Pukrushpan, A.G. Stefanopoulou, H. Peng, in IEEE, American Control Conference 2003

    5.    “Control of Natural Gas Catalytic Partial Oxidation for Hydrogen Generation in Fuel Cell Aplications,” J.T. Pukrushpan, A.G. Stefanopoulou, H. Peng, in IEEE American Control Conference 2003 ( pdf ) and in IEEE Transactions on Control Systems Technology ( pdf ) v 13, n 1, p 3-14, January, 2005.

    4.    “ Control-Oriented Model of Fuel Processor for Hydrogen Generation in Fuel Cell Applications,” Jay Pukrushpan, Anna Stefanopoulou, Subbarao Varigonda, in IFAC Symposium in Adavnces in Automotive Systems, Salerno, 2004 ( pdf ) and to appear in IFAC, Control Engineering Practice, 2005 (pdf)

    3.    “Challenges in Fuel Cell Power Plant Control: The Role of System Level Models,” S. Varigonda, J. Pukrushpan, A. G. Stefanopoulou, in 2003 AIChE Spring Meeting ( pdf ).

    2. "Modeling and Control of Fuel Cell Systems and Fuel Processor Systems," Jay Tawee Pukrushpan, PhD Thesis , Jan 2003, Co-Chairs: Anna Stefanopoulou and Huei Peng

    1. "Modeling and Control of Fuel Cell PEM Stack Systems ," in Proceedings of 2002 American Control Conference, pp. 3117-3122, Anchorage, AK

    Electromechanical Valve Actuator:
     
    11. “Nonlinear Magnetic Levitation of Automotive Engine Valves,” K.S. Peterson, J.W. Grizzle, A.G. Stefanopoulou, 3rd Symposium on Mechatronic Systems, pp 645-650, 2004  (best student paper award)

    10. “ Virtual Lash Adjuster for an Electromechanical Valve Actuator through Iterative Learning Control ,” K. S. Peterson, A. G. Stefanopoulou, Y. Wang, T. Megli, Proceedings IMECE DSCD 2003-41270.

    9.    “ Rendering the Elecreomechanical Valve Actuator Globally Asymptotically Stable ,” K.S. Peterson, A. G. Stefanopoulou, in 2003 Conference on Decision and Control, March 2003.

    8.    “ Extremum Seeking Control for Soft Landing of an Electromechanical Valve Actuator ,” K. S. Peterson, A. G. Stefanopoulou, to appear Automatica, xx xx, 200x

    7.    “ Control of Electromechanical Actuators: Valves Tapping in Rhythm ”, Kathy Peterson, Yan Wang, Anna Stefanopoulou,  in Multidisciplinary Research in Control: The Mohammed Dahleh Symposium 2002. Eds. L. Giarre' and B. Bamieh, Lecture Notes in Control and Information Sciences N. 289, Springer-Verlag, Berlin, 2003,  ISBN 3-540-00917-5

    6.     “ Nonlinear Self-Tuning Control for Soft Landing of an Electromechanical Valve Actuator ”, K. Peterson, A. Stefanopoulou , Proceedings of IFAC Mechatronics Conference, Nov 2002

    5.    “ Experimental Results and Implementation Issues of an Iterative Learning Controller for Soft Landing of an Electromechanical Valve Actuator ”, Kathy Peterson, Wolfgang Hoffmann, Anna Stefanopoulou, Proceedings of 2002 Mediterranean Conference

    4. "Output Observer Based Feedback for Soft Landing of Electromechanical Camless Valvetrain Actuator ," in Proceedings of 2002 American Control Conference, pp. 1413-1418, May 2002 

    3."Modeling and Control of Electromechanical Valve Actuator," Y. Wang, A. Stefanopoulou, K. Peterson, T.Megli, M.Haghgooie, SAE 2002-01-1106 .

    2.``Iterative Learning Control of Electromechanical Camless Valve Actuator ,'' W. Hoffmann, A. Stefanopoulou,  IEEE Transactions on Control System Technology, Vol 11, no.2, p. 174-184, March 2003.

    1. "Modeling of an Electromechanical Valve Actuator for a Camless Engine," Yan Wang, Anna Stefanopoulou,
    Mohammad Haghgooie, Ilya Kolmanovsky, Mazen Hammoud, Proceedings 5th Int'l Symposium on Advanced Vehicle Control, no. 93, Aug 2000.

    Control Architectures: Analysis and Design

    1. “Effects of Control Structure on Performance for an Automotive Powertrain with Continuously Variable Transmission ,” Sharon Liu, Anna Stefanopoulou in IEEE Transactions on Control System Technology, vol. 10, no. 5, 701-9, Sept. 2002

    2. “Control Techniques for Assessing Feasibility and Defining Subsystem Level Requirements: An Automotive Case Study ”, I. Kolmanovsky and A. G. Stefanopoulou, IEEE Transactions on Control System Technology, Vol.9, no.3, p.524-34, May 2001.

    3. "Automotive Powertrain Control for Modular Controller Architectures: A Case Study," A.G. Stefanopoulou, K.R. Butts, J.A. Cook, J.S. Freudenberg and J.W. Grizzle, Proc. 1995 Conference on Decision and Control, pp. 768-773.


    Longitudinal Control of Heavy Duty Vehicles:

    11. Adaptive MPC for braking assist, A. Vahidi, A. Stefanopoulou , submitted to IMECE 2004

    10. Recursive Least Squares with Forgetting for Online Estimation of Vehicle Mass and Road Grade: Theory and Experiments, A. Vahidi, A. Stefanopoulou H. Peng, to appear Journal of Vehicle Dynamics ( pdf )

    9.    “Experiments for Online Estimation of Heavy Vehicle’s Mass and Time-Varying Road Grade,” A. Vahidi, A. Stefanopoulou H. Peng, Proceedings IMECE DSCD 2003_42807, Jan 2003 ( pdf )

    8.    “Speed Control Experiments for Heavy Duty Vehicle with Coordinated Friction and Engine Compression Brakes,” Maria Druzhinina, Anna Stefanopoulou, submitted to International Journal of Heavy Vehicle Systems, Nov 4, 2002.

    7.    “Recursive Least Squares with Forgetting for Online Estimation of Vehicle Mass and Road Grade: Theory and Experiments,” Ardalan Vahidi, Anna Stefanopoulou, Huei Peng, submitted to Vehicle System Dynamics, Jan 16, 2003.

    6. “Speed Control Experiments for Commercial Heavy Vehicles with Coordinated Friction and Engine Compression Brakes ,” M. Druzhinina, A. Stefanopoulou, in 2002 American Control Conference Proceedings, pp 2546-2551, May 2002.

    5. “ Adaptive Continuously Variable Compression Braking Control for Heavy-Duty Vehicles ,” Maria Druzhinina, Anna Stefanopoulou, Lasse Moklegaard, ASME Journal of Dynamic Systems, Measurement, and Control Vol 124, no.3, Sept 2002.

    4. “Speed Gradient Approach to Longitudinal Control of Heavy-Duty Vehicles Equipped with Variable Compression Brake”, Maria Druzhinina, Anna Stefanopoulou, Lasse Moklegaard, IEEE Transactions on Control System Technology, Vol.10, no. 2, p. 209-221, March 2002 in pdf

    3. “Brake Valve Timing and Fuel Injection: a Unified Engine Torque Actuator for Heavy-Duty Vehicles”, Lasse Moklegaard, Maria Druzhinina, Anna Stefanopoulou, Journal of Vehicle System Dynamics, vol 36, No 2-3, Sept 2001 in pdf

    2. "Speed Gradient Approach to Longitudinal Control of Heavy -Duty Vehicles Equipped with Variable Compression Brake ," Maria Druzhinina ,  Lasse Moklegaard and Anna Stefanopoulou, Proceedings AVEC 2000.

    1. "Brake Valve Timing and Fuel Injection: a Unified Engine Torque Actuator for Heavy-Duty Vehicles ," Lasse Moklegaard, Maria Druzhinina, Anna Stefanopoulou, Proceedings AVEC 2000.

    Control of Turbocharged Diesel Engines:  

    14. “ Pressure and Temperature based Adaptive Observer of Air Charge for Turbocharged Diesel Engines” , Anna Stefanopoulou , Ove Storset, Roy Smith, International Journal of Robust and Nonlinear Control, Vol 14, no 6, pp 543-560, April 2004.

    13.   “Adaptive Air Charge Estimation for Turbocharged Diesel Engines ”, O. Storset, A. Stefanopoulou, R. Smith, ASME Journal of Dynamic Systems Measurements and Control, June 2004.

    12. " EGR-VGT Control Schemes: Experimental Comparison for a High-Speed Diesel Engine ." M. J. van Nieuwstadt, I.V. Kolmanovsky, P.E. Moraal, A, G. Stefanopoulou, M. Jankovic, Control System Magazine, Vol 20, no. 3, pp 63-79, June 2000.

    11. " Air Charge Estimation for Turbocharged Diesel Engines ," O. Storset, A. Stefanopoulou, R. Smith, Proceedings ACC 2000.

    10. "Compression Braking Control for Heavy-Duty Vehicles ," M. Druzhinina, L. Moklegaard, A. Stefanopoulou, Proceedings 2000 ACC.

    9. " Transition from Combustion to Variable Compression Braking ",  L. Moklegaard, A. G. Stefanopoulou, J. Schmidt, SAE 2000-01-1228.

    8. "Evaluation of Turbocharger Power a Assist System Using Optimal Control Techniques ",   Ilya Kolmanovsky and Anna Stefanopoulou, SAE 2000-01-0519.

    7.    “Maneuverability and Smoke Constraints in Marine Diesel Propulsion”, A. G. Stefanopoulou and R. Smith, IFAC Journal of Control Engineering Practice, vol.8, no.9; Sept. 2000; p.1023-31in pdf .

    6. “Inherent Limitations and Control Design for Camless Engine Idle Speed Dynamics'', Yan Wang, Anna Stefanopoulou, Roy Smith, IFAC Journal of Robust Nonlinear Optimal Control, vol.11, no.11; Sept. 2001; p.1023-42 in pdf

    5. " Improving Turbocharged Diesel Engine Operation with Turbo Power Assist System," I. Kolmanovsky, A. G. Stefanopoulou, and B. K. Powell, Proc 1999, Conf. on Control Applications,   pp. 454-459, Hawaii, HI.

    4. "Control of Variable Geometry Turbocharged Diesel Engines for Reduced Emissions," A. G. Stefanopoulou, I. Kolmanovsky, J. S. Freudenberg, ACC 1998 .  pp. 1383-1388 and to appear, IEEE Transactions on Control System Technology in pdf

    3. ``Emissions and Performance Tradeoffs for Advanced Marine Diesel Propulsion,'' A. G. Stefanopoulou and R. Smith, IFAC Conf. in Marine Systems, pp. 39-44, Fukuoka, Japan, 1998

    2. "A Comparison of SISO and MIMO Designs for EGR-VNT Control of High Speed Diesel Engines," M. van Nieustandt, P.E. Moraal, I.V. Kolmanovsky and A.G. Stefanopoulou, IFAC Workshop on Advances in Automotive Control.

    1. "Issues in Modeling and Control of Intake Flow in Variable Geometry Turbocharged Engines," I.V. Kolmanovsky, A.G. Stefanopoulou, P.E. Moraal and M. van Nieustandt, in 18th IFIP Conference on System Modelling and Optimization.

    Control of Engines with Variable Valve Timing:

    1.    “ Control of Charge Dilution in Turbocharged Diesel Engines via Exhaust Valve Timing ,” H. Yilmaz, A.G. Stefanopoulou, submitted to  Journal of Dynamic Systems, Measurement and Control, DS-03-1094, April 4, 2003 and short version in Proceedings American Control Conference 2003 (INV0401).

    2. "Control-Oriented Model for Camless Intake Process (Part I)"  M.-S. S. Ashhab,  A. G. Stefanopoulou,   J. A. Cook,  M. B. Levin, Proc. 1999  IMECE, DSCD pp.  179-186, ASME Journal of Dynamic Systems, Measurement, and Control, Vol 122, pp. 122-130, March 2000 .

    3. "Control of Camless Intake Process (Part II)"  M.-S. S. Ashhab,  A. G. Stefanopoulou,   J. A. Cook,  M. B. Levin, to appear Proc.  1999  IMECE, DSCD , pp. 187-194,  ASME Journal of Dynamic Systems, Measurement, and Control, Vol 122, pp. 131-139, March 2000.

    4. "Idle Speed Control : An old problem in a new engine design,"  Yan Wang,  Anna Stefanopoulou,   Mike Levin,  Proc.  1999 American Control Conference, pp.  1217-1220, San Diego, CA.

    5. "Multivariable Controller Structure in a Variable Cam Timing Engine with Electronic Throttle and Torque Feedback," S. C. Hsieh, J. S. Freudenberg, and A. G. Stefanopoulou,  Proc 1999, Conf. on Control Applications, pp. 465-470, Hawaii, HI.

    6. ``Control-Oriented Model of a Dual Equal Variable Cam Timing Spark Ignition Engine,'' A.G. Stefanopoulou, J. A. Cook, J. S.Freudenberg, and J. W. Grizzle, ASME Journal of Dynamic Systems, Measurement, and Control, vol. 120, pp. 257-266, 1998

    7. "Variable Camshaft Timing Engine Control," A.G. Stefanopoulou, J.S. Freudenberg and J.W. Grizzle, IEEE Transactions on Control System Technology, Vol.8, No.2, Jan.2000, pp.23-34 in pdf

    8. "Joint Air-Fuel Ratio and Torque Regulation  using Secondary Cylinder Air Flow Actuators," A.G. Stefanopoulou, J.W. Grizzle and J.S. Freudenberg,  ASME Journal of Dynamic Systems, Measurement, and Control, Vol.121, No.4, Dec.1999, pp.638-647.

    9. "Analysis and Control of Transient Torque Response in Engines with Internal Exhaust Gas Recirculation," A.G. Stefanopoulou and I. Kolmanovsky, IEEE Transactions on Control System Technology,   Vol.7, No.5, Sep.1999, pp.555-566.

    10. ``Torque Management of Engines with Variable Cam Timing,'' M. Jankovic, F. Frischmuth, A. G. Stefanopoulou, and J. A. Cook, IEEE Control Systems Magazine, vol. 18, pp. 34-42, Oct. 1998.

    11. ``Camless Engine Cotrol for Robust Unthrottled Operation,'' M. S. Ashhab, A. G. Stefanopoulou, J. A. Cook, and M. Levin, Society of Automotive Engineers Special Publication Series SP-1346, SAE #981031, Detroit, 1998.

    12. "Emission and Drivability Tradeoffs in a Variable Cam Timing SI Engine with Electronic Throttle," S.C. Hsieh, A.G. Stefanopoulou, J.S. Freudenberg and K.R. Butts, Proc. 1997 American Control Conference, pp. 284-288.

    13. "Dynamic Scheduling of Internal Exhaust Gas Recirculation Systems," A.G. Stefanopoulou and I. Kolmanovsky, Proc. IMECE 1997, Sixth ASME Symposium on Advanced Automotive Technologies, pp. 671-678.

    14. "Modeling and Control of a Spark Ignition Engine with Variable Cam Timing," A.G. Stefanopoulou, J.S. Freudenberg, J.W. Grizzle, M. Haghgooie and P.S. Szpak, Proc. 1995 American Control Conference, pp. 2576-2581.

    15. "Engine Air-Fuel Ratio and Torque Control Using Secondary Throttles," A.G. Stefanopoulou, J.W. Grizzle and J.S. Freudenberg, Proc, 1994 Conference on Decision and Control, pp. 2748-2753.

    3. "Interpolation and Numerical Differentiation for Observer Design," S. Diop, J.W. Grizzle, P.E. Moraal and A. Stefanopoulou, Proc. 1994 American Control Conference, pp. 1329-1333.

    2. "An Initial Assessment of Fuzzy Logic Vessel Path Control," M.G. Parsons, A.C. Chubb, Y. Cao and A.G. Stefanopoulou, Proc. 1994 IEEE Symposium on Autonomous Underwater Vehicles, pp. 225-232.

    1. "Modeling and Control of Advanced Technology Engines, " A. G. Stefanopoulou, Ph.D. Thesis, University of Michigan, Feb. 1996.
       

  • Patents

    • 8. US 6,681,728 Method for controlling an electromechanical actuator for Fuel Air Charge Valve,  K.S. Peterson, A.G. Stefanopoulou, T. Megli, Y Wang, M. Haggooie, Jan 2004
    7. US 6,579,206 “Coordinated control for a powertrain with a continuously variable transmission,” Sharon Liu, Anna Stefanopoulou, June 2003
    6.    US 6,568,173 B1 “Control method for turbocharged diesel engine aftertreatment system”, Ilya Kolmanovsky, Anna Stefanopoulou, June 2003
    5.    U.S. 6,186,124 “System and Method For Controlling Camshaft Timing, Air/Fuel Ratio, and Throttle Position in an Automotive Internal Combustion Engine”, A.G.  Stefanopoulou and M. Jankovic. This application is a divisional of Ser. No.  09/005,571, now U.S.  Pat. No. 6,006,725, Feb  2001.
    4.    U.S. 6,076,353 “A Method for Coordination and Calibration of Variable Geometry Turbocharger and Exhaust Gas Recirculation in Diesel Engines”, J. S. Freudenberg, I. V. Kolmanovsky, A. G. Stefanopoulou, Jan 1999.
    3.    U.S. 6,006,725 “System and Method For Controlling Camshaft Timing, Air/Fuel Ratio, and Throttle Position in an Automotive Internal Combustion Engine”, M. Jankovic, A.G.  Stefanopoulou, Jan 1998.
    2.    U.S. 5,787,848  “A Method of System for Operating An Internal Combustion Engine Having Variable Valve Timing”, A. G.  Stefanopoulou, I. V. Kolmanovsky, Dec 1997.
    1.    U.S. 5,755,202 “A Method for Reducing Feedgas Emissions”, A. G. Stefanopoulou, K.R. Butts, Oct 1996.

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