Selected Publications:

General Process Control:

Hardt, D.E., "Modeling and Control of Manufacturing Processes: Getting More Involved", ASME J. of Dynamic Systems Measurement and Control, 115, June. 1993, pp 291-300

Welding Process Control:

Song, J.-B. and Hardt, D. E., "Closed-Loop Control of Weld Pool Depth Using a Thermally Based Depth Estimator" Welding Journal, September, 1993

Suzuki, A., Hardt, D.E., and Valavani, L. "Application of Adaptive Control Theory to On-Line GTA Weld Geometry Regulation" ASME J. of Dynamic Systems Measurement and Control, 113, Mar. 1991, pp. 93-103

Doumanidis, C. C. and Hardt, D.E., "Multivariable Adaptive Control of Thermal Properties During Welding" ASME J. of Dynamic Systems, Measurement and Control, Dec. 1991

Doumanidis, C. C. and Hardt, D. E., "Simultaneous In-Process Control of Heat-Affected Zone and Cooling Rate During Arc Welding" Welding Journal, May 1989

Bates, B. E. and Hardt, D. E. "A Real-Time Calibrated Thermal Model for Closed-Loop Weld Bead Geometry Control" J. of Dynamic System, Measurement and Control, 107, 1985

Hardt, D. E., Garlow, D. A., Weinert, J. B., "A Model of Full Penetration Arc-Welding for Control System Design" J. of Dynamic Systems, Measurement and Control, 107 Mar. 1985

Hardt, D. E. and Katz, J. M. "Ultrasonic Measurement of Weld Penetration" Welding Journal, Sept. 1984

Zacksenhouse, M. and Hardt, D.E. "Weld Pool Impedance Identification for Size Measurement and Control" Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, 105, no. 4, 1983

Sheet Metal Forming Process Control:

Hardt, D. E., Norfleet, W. A., Valentin, V. M., Parris, A., "In Process Control of Strain in a Stretch Forming Process" ASME Journal of Engineering Materials and Technology 123, 4, -October 2001 - pp. 496-503

Walczyk, D. F., Hardt, D. E. "A Comparison of Rapid Fabrication Methods for Sheet Metal Forming Dies" ASME Journal of Manufacturing Science and Engineering 121, May 1999, pp. 214-224

Walczyk, D. F., Hardt, D. E., "Rapid Tooling for Sheet Metal Forming Using Profiled Edge Laminations--Design Principles and Demonstration" AMSE Journal of Manufacturing Science and Engineering, Aug. 1998.

Walczyk, D. F., Hardt, D. E., "Design and Analysis of Reconfigurable Discrete Dies for Sheet Metal Forming" SME Journal of Manufacturing Systems Fall 1999

Hardt, D. E., Fenn, R. C., "Real-Time Control of Sheet Stability During Forming" ASME Journal of Engineering for Industry, Dec. 1992

Hardt, D. E., Constantine, E., Wright, A., "A Model of the Sequential Bending Process for Manufacturing Simulation" ASME J. of Engineering for Industry 114, May 1992

Webb, R. D., Hardt, D. E., "A Transfer Function Description of Sheet Metal Forming for Process Control" ASME J. of Engineering for Industry, Feb. 1991

Hardt, D. E., Wright, A., Constantine, E. "A Design-Oriented Model of Plate Forming for Shipbuilding" Journal of Ship Production, Nov. 1990

Tam, A. S., Hardt, D. E. "Weld Pool Impedance for Pool Geometry Measurement: Stationary and Nonstationary Pools" J. Dynamic Systems, Measurement and Control Dec. 1989

Doumanidis, C. C., Hardt, D. E. "A Model for In-Process Control of Thermal Properties During Welding" J. of Dynamic Systems, Measurement and Control, Dec. 1989

Hale, M., Hardt, D. E. "Dynamic Analysis and Control of a Roll Bendng Process" IEEE Control Systems Magazine, Apr. 1987

Hardt, D. E., Chen, B. "Control of a Sequential Brakeforming Process" J. of Engineering for Industry 107, May 1985

Hardt, D. E., Roberts, M.A., Stelson, K. A. "Closed-Loop Shape Control of a Roll-Bending Process" Transactions of ASME, Journal of Dynamic Systems, Measurement and Control, 104, no. 4, 1982

Robotics:

Sharon, A., Hogan, N., Hardt, D. E. "The Macro/Micro Manipulator: An Improved Architecture for Robot Control" IEEE Trans on Robotics and Automation, Dec. 1988

Slocum, A. H., Hardt, D. E., Greenspan, L. "Development of a Six Degree-of-Freedom Position and Orientation Sensing Device: Design Theory and Testing" Int. Journal of Machine Tools and Manufacture, 28, no. 4 1987

Zalucky, A., Hardt, D. E. "Active Control of Robot Structure Deflections" Transactions of ASME Journal of Dynamic Systems, Measurement and Control 105, no. 1 Mar. 1984

Microembossing:

Other:

Sharon, A., Hogan, N., Hardt, D. E. "Controller Design in the Physical Domain" J. of Franklin Institute, 328, 1991

Ettountey, O., Hardt, D. E. "A Method for In-Process Failure Prediction in Cold Upset Forging" Transactions of ASME, Journal of Engineering for Industry, 105 no. 3, 1983

Hardt, D. E., Mann, R. W. "Technical Note: A Five Body-Three Dimensional Dynamic Analysis of Walking" J. Biomech. 13, no. 5, 1979

Hardt, D. E., "Determining Muscle Forces in the Leg During Normal Human Walking--An Application and Evaluation of optimization Methods " Trans. of AMSE, Journal of Biomedical Engineering, 100, 1978

Walczyk, D. F., Hardt, D. E., "Rapid Tooling for Sheet Metal Forming Using Profiled Edge Laminations--Design Principles and Demonstration" ASME Journal of Manufacturing Science and Engineering Aug. 1998

Walczyk, D. F., Hardt, D. E., "A Comparison of Rapid Fabrication Methods for Sheet Metal Forming Dies" ASME Journal of Manufacturing Science and Engineering 121, May 1999

Hardt, D. E., Norfleet, W. A., Valentin, V. M., Parris, A. "In Process Control of Strain in a Stretch Forming Process" ASME Journal of Materials and Technology 123, 4, October 2001