Neil A. Duffie Professor Address/E-mail Program Affiliations Courses Education Fields of Interest Awards & Honors Selected Publications Summary

Contact Information

2254 Mechanical Engineering Building 1513 University Avenue Madison, WI 53706

Tel: 608/262-9457 Fax: 608/265-2316 E-mail: duffie@engr.wisc.edu

Program Affiliations

• Mechanical Engineering

• Manufacturing Systems Engineering Program
• Master of Engineering in Engine Systems

Courses

• ME 314: Introduction to Competitive Manufacturing
• ME 340: Introduction to Dynamic Systems
• ME 446: Automatic Controls
• ME 447: Computer Control of Machines and Processes
• ME 747: Advanced Computer Control of Machines and Processes

Education

• BS, 1972, University of Wisconsin-Madison
• MS, 1974, University of Wisconsin-Madison
• PhD, 1980, University of Wisconsin-Madison

Fields of Interest

• robotics
• computer control
• manufacturing systems
• manufacturing logistics
• computer-integrated manufacturing

Selected Awards, Honors and Societies

• Mercator Professorship, German Research Foundation, 2008
• Fellow of ASME, 2006
• Fellow of CIRP (International Academy for Production Engineering), 1999
• Fellow of SME (Society of Manufacturing Engineers), 1998; President 2008
• SME Outstanding Young Manufacturing Engineer Award, 1984

Selected Publications

• Toshniwal, V.; Duffie, N.; Jagalski, T.; Rekersbrink, H.; Scholz-Reiter, B.; "Assessment of Fidelity of Control-Theoretic Models of WIP Regulation in Networks of Autonomous Work Systems," CIRP Annals - Manufacturing Technology, Vol. 60/1/2011.
• Vadali, Madhu; Ma, Chao; Duffie, Neil; Li, Xiaochun; Pfefferkorn, Frank; "Model Guided Pulsed Laser Micro Polishing of H13 Tool Steel," To appear in Proc. of the 44th CIRP Conference on Manufacturing Systems, Madison, WI, June 1-3, 2011.
• Vadali, M; Ma, C.; Duffie, N.A.; Li, X.; Pfefferkorn, F.E.; "Pulsed Laser Micro Polishing: An analytical method for predicting surface finish," To appear in Proc. of AMSE International Manufacturing Science and Engineering Conference: MSEC2011, Corvallis, OR, June 13-17, 2011.
• Vadali, M.; Ma, C.; Duffie, N.A.; Li, X.; Pfefferkorn, F.E.; "Pulsed Laser Micro Polishing: Surface Prediction Model," International Conference on MicroManufacturing (ICOMM), Tokyo, Japan, March 7-10, 2011, pp. 331-338 (Outstanding Paper Award).
• Karimi, H.R.; Duffie, N.A.; Dashkovskiy, S; "Local Capacity H∞ Control for Production Networks of Autonomous Work Systems with Time-Varying Delays," IEEE Trans. on Automation Science & Engineering, Vol. 7, No. 4, 2010, pp. 849-857.
• Wu, Tao; Shi, Leyuan; Duffie, Neil; "A HMP-MP Approach for the Capacitated Multi-Item Lot Sizing Problem with Setup Times," IEEE Trans. on Automation Science & Engineering, Vol. 7, No. 3, 2010, pp. 500-511.
• Duffie, N. A., Shi, L.; "Dynamics of WIP Regulation in Large Production Networks of Autonomous Work Systems," IEEE Trans. on Automation Science & Engineering, Vol. 7, No. 3, 2010, 665-670.
• Fehrenbacher, A.; Duffie, N.A.; Ferrier, N.J.; Zinn, M.R.; Pfefferkorn, F.E.; "Temperature Measurement and Closed-Loop Control in Friction Stir Welding," to appear in Proc. of 8th Intl. Friction Stir Welding Symp., Timmendorfer Strand, Germany, May 18-20, 2010.
• Smith, B.B.; Wolf, D.M.; Turner, K.T.; Duffie, N.A.; Li, X.; Pfefferkorn, F.E.; "Laser Polishing of Micro-Machined Microfluidic Molds," Proc. of 5th Intl. Conf. on Micromanufacturing (ICOMM/4M 2010), Madison, WI, April 5-8, 2010, pp.445-451.
• Perry, Tyler L.; Werschmoeller, Dirk; Li, Xiaochun; Pfefferkorn, Frank E.; Duffie, Neil A.; "Pulsed Laser Polishing of Micromilled Ti6Al4V Samples," SME J. of Manufacturing Processes, Vol. 11, No. 2, 2009, pp. 74-81.
• Duffie, N.A.; Shi, L.; "Maintaining Constant WIP-Regulation Dynamics in Production Networks with Autonomous Work Systems," CIRP Annals - Manufacturing Technology, Vol. 58/1/2009, pp. 399-402.
• Perry, Tyler L.; Werschmoeller, Dirk; Li, Xiaochun; Pfefferkorn, Frank E.; Duffie, Neil A.; "The Effect of Laser Pulse Duration and Feedrate on Pulsed Laser Polishing of Nickel Samples," ASME J. of Mfg. Sci. & Engr., Vol. 131, No. 3, 2009.
• Perry, Tyler L.; Werschmoeller, Dirk; Duffie, Neil A.; Li, Xiaochun; Pfefferkorn, Frank E.; "Examination of Selective Pulsed Laser Micropolishing on Microfabricated Nickel Samples Using Spatial Frequency Analysis," ASME J. of Mfg. Sci. & Engr., Vol. 131, No. 2, 2009.
• Tao, W.; Shi, L.; Quirt, B.; Duffie, N.A.; "Integrated Dynamic and Simulation Model on Coupled Closed-Loop Workstation Capacity Controls in a Multi-Workstation Production System," Proc. of the 40th Conf. on Winter Simulation, Miami, FL, Dec. 7-10, 2008, pp. 1946-1951.
• Perry, Tyler L.; Werschmoeller, Dirk; Li, Xiaochun; Pfefferkorn, Frank E.; Duffie, Neil A.; "Pulsed Laser Micro Polishing of Microfabricated Nickel and Ti6Al4V Samples," Proc. of ASME Intl. Conf. on Mfg. Sci. and Engr., Evanston, IL, Oct. 7-10, 2008.
• Duffie, N.A.; Roy, D.; Shi, L.; "Dynamic Modeling of Production Networks of Autonomous Work Systems with Local Capacity Control," CIRP Annals - Manufacturing Technology, Vol. 57/1/2008, pp. 463-466.
• Wiendahl, H.-P.; ElMaraghy, H. A.; Nyhuis, P.; Zaeh, M. F.; Wiendahl, H.-H.; Duffie, N.; Brieke, M.; "Changeable Manufacturing - Classification, Design and Operation," CIRP Annals - Manufacturing Technology, Vol. 56/2/2007, pp. 783-809.
• Kim, Jin-Hyung; Duffie, Neil A.; "Performance of Coupled Closed-Loop Workstation Capacity Controls in a Multi-Workstation Production System," CIRP Annals - Manufacturing Technology, Vol. 55/1/2006, pp. 449-452.
• Ngo, Chi; Duffie, Neil A.; Perry, Tyler L.; "Generation of Highly Repetitive Irregular Motion for Surface Finishing Processes," Transactions of NAMRI/SME, Vol. 34, 2006, pp. 413-419.
• Kim, Jin-Hyung; Duffie, Neil A.; "Design and Analysis of Closed-Loop Capacity Control for a Multi-Workstation Production System," Annals of the CIRP, Vol. 54/1/2005, pp. 455-458.

Summary

Professor Duffie's research in manufacturing systems involves integrating sensors, actuators, computers and data bases into advanced automated production systems. He has developed controls for self-guided inspection machines and welding robots, high-performance material handling systems, and automated finishing systems for mold and die production and rework. He is studying highly distributed, non- hierarchical system control architectures in hope of reducing cost and complexity in large-scale manufacturing systems while increasing flexibility and fault tolerance.

Duffie has constructed several experimental manufacturing systems that incorporate real-time, fully distributed scheduling and optimization into their control systems. He is developing theories explaining the fundamental dynamic properties and performance of distributed autonomous logistic systems.

Duffie works closely with manufacturing industries and teaches courses on manufacturing systems, automatic controls and computer controls. He co-authored Computer Control of Machines and Processes.