User Profile

callafon


Name
Raymond de Callafon
Status:
Professor
Location:
La Jolla, CA, USA
Research Interests:
Astronomy & Space
Affiliations:
Director, System Identification and Control Laboratory; Associate Professor of Mechanical and Aerospace Engineering; Affiliated Faculty of the Center for Magnetic Recording Research
Publications
Van den Hof, P.M.J., Schrama, R.J.P., de Callafon, R.A. and Bosgra, O.H., “Identification of normalized coprime plant factors from closed-loop experimental data”, European Journal of Control, Vol. 1, No. 1, pp. 62-74, 1995.
de Callafon, R.A., Van den Hof, P.M.J., “Control relevant identification for H_infinity-norm based performance specifications,” Selected Topics in Identification, Modelling and Control, Vol.8, pp. 31-38, 1995. Bosgra, O.H., Van den Hof, P.M.J. and Scherer, C.W. (Eds.)
de Callafon, R.A., and Van den Hof, P.M.J., “FREQID – frequency domain identification toolbox for use with Matlab”, Selected Topics in Identification, Modelling and Control, Vol. 19, pp. 129-134, 1996. Bosgra, O.H., Van den Hof, P.M.J. and Scherer, C.W. (Eds.)
de Callafon, R.A., Van den Hof, P.M.J., and Bongers, P.M.M., "A unified approach to stability robustness for uncertainty descriptions based on fractional model representations", IEEE Trans. On Automatic Control, AC-41, pp. 723-727, 1996.
Van den Hof P.M.J., de Callafon R.A., van Donkelaar E. “CLOSID-a Matlab toolbox for closed-loop system identification,” Selected Topics in Identification, Modelling and Control, Vol.9, pp. 121-128, 1996. Bosgra, O.H., Van den Hof, P.M.J. and Scherer, C.W. (Eds.)
Van den Hof, P.M.J., de Callafon, R.A., “Multivariable closed-loop identification: from indirect identification to dual-Youla parametrization,” Selected Topics in Identification, Modelling and Control, Vol.9, pp. 1-7, 1996. Bosgra, O.H., Van den Hof, P.M.J. and Scherer, C.W. (Eds.)
de Callafon, R.A., de Roover, D., Van den Hof, P.M.J., “Multivariable least squares frequency domain identification using polynomial matrix fraction descriptions,” Selected Topics in Identification, Modelling and Control, Vol.9, pp. 31-37, 1996. Bosgra, O.H., Van den Hof, P.M.J. and Scherer, C.W. (Eds.)
de Callafon, R.A. and Van den Hof, P.M.J. “Suboptimal feedback control by a scheme of iterative identification and control design,” Mathematical Modelling of Systems, Vol. 13, pp. 77-101, 1997.
de Callafon, R.A., Harper, D.H.F., Skelton, R.E. and Talke, F.E., “Dynamic modeling and feedback control of a piezo-based milli-actuator,” Selected Topics in Identification, Modelling and Control, Vol.11, pp. 79-85, 1998. Bosgra, O.H., Van den Hof, P.M.J. and Scherer, C.W. (Eds.)
Harper D.H.F., de Callafon R.A., Skelton R.E. and Talke F.E., “Piezoelectric stack-based microactuator for hard disk drives”, Journal of Information Storage & Processing Systems, Vol. 1, No. 4, pp.329-332, 1999. Publisher: Birkhauser Boston, USA.
de Callafon, R.A., Harper, D.H.F., Skelton, R.E. and Talke, F.E., “Experimental modeling and feedback control of a piezo-based milli-actuator,” Journal of Information and Storage Processing Systems, Vol. 1, No. 3, pp. 217-224, 1999. Publisher: Birkhauser Boston, USA.
Van den Hof P.M.J., de Callafon R.A., van Donkelaar E. CLOSID-a Matlab toolbox for closed-loop system, Journal A, Vol. 40, No. 3, pp.19-24, 1999. Publisher: Soft Vision, Belgium.
de Callafon, R.A. and Van den Hof, P.M.J., “Multivariable Feedback Relevant System Identification of a Wafer Stepper System”, IEEE Transactions on Control Systems Technology, Vol. 9, No. 2, pp. 381-390, 2001.
de Callafon, R.A., “Discussion on the Robust Design of Predictive Controllers in Presence of Unmodeled Dynamics'', European Journal of Control, Vol.9, Nb.5, pp. 507-509, 2003.
Rotunno, M., de Callafon, R.A. and Talke, F.E., “Comparison and Design of Servo Controllers for Dual-Stage Actuators in Hard Disk Drives”, IEEE Transactions on Magnetics, Vol. 39, No. 5, pp. 2597-2599, 2003.
Teerjuis, A.P., Cools, S.J.M. and de Callafon, R.A., “Reduction of Flow-Induced Suspension Vibrations in a Hard Disk Drive by Dual-Stage Suspension Control”, IEEE Transactions on Magnetics, Vol. 39, No. 5, p.. 2237-2239, 2003.
J. Zeng and R.A. de Callafon, “Control relevant estimation of plant and disturbance dynamics - model approximation on the basis of closed-loop data”, to appear in Automatica, 2004.
J. Jose, R.J. Taylor, R.A. de Callafon and F.E. Talke, “Characterization of Lateral Tape Motion and Disturbances in the Servo Position Error Signal of a Linear Tape Drive”, to appear in Tribology International, 2004.
History of Education and Employment
Raymond Arnoud de Callafon was born in 1968 in Rotterdam, the Netherlands. After finishing high school in 1986, he has studied both Electrical and Mechanical Engineering respectively for two and four years at the Delft University of Technology.

In December 1992 he received his M.Sc. degree (cum laude) with Mechanical Engineering in the Systems and Control Group at Delft University of Technology. During his graduate study he has worked on the multivariable system identification of a compact disc pick-up mechanism.

In October 1998 he received his Ph.D. degree from Delft University of Technology. The research in his Ph.D. project was sponsored by the Dutch Systems and Control Theory Network, currently known as the Dutch Institute of Systems and Control (DISC). His Ph.D. research focused on the interaction between closed loop system identification and model-based control design. Techniques that have been developed were to a multivariable positioning mechanism present in a Wafer Stepper.

From April 1997 till May 1998 he worked as a Research Assistant with the Structural Systems and Control Laboratory of Prof. Skelton at the department of Applied Mechanics and Engineering Sciences at the University of California, San Diego. He worked on the modeling and control of tensile based structures, known as tensegrity structures.

Since July 1998 he works as an (acting) tenure-track assistant professor with the Dynamic Systems and Control group at the University of California, San Diego. His research interests include various topics in the field of system identification, structural damage detection, (linear) feedback control design, model/controller reduction and identification and control problems applied to real life applications.