Raymond de Callafon

High Track Density Magnetic Recording:

• Modeling and control of piezo-electric mico-actuator actuator
• Systematic dual-stage feedback control design
• Estimation of disturbances in a hard disk drive and in a linear tape system

Raymond de Callafon received his Ph.D. degree in Mechanical Engineering from Delft University of Technology, the Netherlands in October 1998. After one year as a research assistant at UCSD in 1997, he joined the MAE faculty in the Dynamic Systems and Control Program in 1998.

CMRR Related Publications

1. “Experimental Modeling and Feedback Control of a Piezobased Milliactuator”, R.A. de Callafon, D.H.F. Harper, R.E. Skelton, and F.E. Talke, Journal of Information Storage and Processing Systems, Vol. 1, No. 3, pp. 217-24, (July 1999)
2. “Piezoelectric Stack-Based Microactuator for Hard Disk Drives”, D.H.F. Harper, R.A. de Callafon, R.E. Skelton, and F.E. Talke, Journal of Information Storage and Processing Systems, Vol. 1, No. 4, pp. 329-32, (December 1999)
3. “Fixed Order H8 Control Design for Dual-Stage Hard Disk Drives”, M. Rotunno, and R.A. de Callafon, Proceedings of the 39th Conference on Decision and Control 2000, Vol. 4, pp. 3118-3119, (December 2000) [PDF UCSD only]
4. “Comparison and Design of Servo Controllers for Dual-Stage Actuators in Hard Disk Drives”, M. Rotunno, R.A. de Callafon, and F.E. Talke, IEEE Transactions on Magnetics, Vol. 39, No. 5, pp. 2597-2599, (September 2003) [PDF UCSD only]
5. “Reduction of Flow-Induced Suspension Vibrations in a Hard Disk Drive by Dual-Stage Suspension Control” , A.P. Teerjuis, S.J.M. Cools, and R.A. de Callafon, IEEE Transactions on Magnetics, Vol. 39, No. 5, pp. 2237-2239, (September 2003) [PDF UCSD only]
6. “Servo Experiments for Modeling of Actuator and Windage Dynamics in a Hard Disk Drive”, J. Zeng, and R.A. de Callafon, Proc. IEEE International Conference on Mechatronics, Istanbul, Turkey, pp. 218-223, (June 2004) [PDF UCSD only]
7. “Characterization of Lateral Tape Motion and Disturbances in the Servo Position Error Signal of a Linear Tape Drive”, J. Jose, R.J. Taylor, R.A. de Callafon, and F.E. Talke, Tribology International, Vol. 38, No. 6-7, pp. 625-632, (June-July 2005) [PDF UCSD only]

2006

8. “Robust Dynamic Modeling and Control of Dual-Stage Actuators”, R.A. de Callafon, R. Nagamune, and R. Horowitz, IEEE Transactions on Magnetics, Vol. 42, No. 2, pp. 247-254, (February 2006) [PDF UCSD only]
9. “An Iterative Learning Design for Repeatable Runout Cancellation in Disk Drives”, M.R. Graham, and R.A. de Callafon, IEEE Transactions on Control Systems Technology, Vol. 14 No. 3, pp. 474-482, (May 2006) [PDF UCSD only]
10. “Identification and Low-Order Control of Hard Disk Drives”, M.R. Graham, and R.A. De Callafon, IEEE International Magnetics conference Intermag 2006, p.606, (May 2006) [PDF UCSD only]
11. “An Iterative Learning Controller for Reduction of Repeatable Runout in Hard Disk Drives”, M.R. Graham, R.A. de Callafon, and L. Shrinkle, American Control Conference 2006, pp.576-581, (June 2006) [PDF UCSD only]
12. “Modeling Product Variations in Hard Disk Drive Micro-Actuator Suspensions”, M. Rotunno, R. Oboe, and R.A. de Callafon, Microsystem Technologies, Vol. 12, No. 9, pp. 803-813, (August 2006) [PDF UCSD only]
13. “Control relevant estimation of plant and disturbance dynamics - model approximation on the basis of closed-loop data”, J. Zeng, and R.A. de Callafon, Automatica, Vol. 42, No. 11, pp 1951-1957, (November 2006). [PDF UCSD only]

2007

14. “Frequency Domain Subspace Identification of a Tape Servo System”, M. Claes, M.R.Graham, and R.A. de Callafon, Microsystem Technologies, Vol.13, No.8-10, pp. 1439-47, (May 2007) [PDF UCSD only]
15. “An Identification Experiment for Simultaneous Estimation of Low-Order Actuator and Windage Models in a Hard Disk Drive”, R. Antonello, R. Oboe, and R.A. de Callafon, IEEE International Symposium on Industrial Electronics 2007, pp. 3102-3107, (June 2007) [PDF UCSD only]
16. “Design of a Dual Stage Actuator Tape Head Controller”, U. Boettcher, B. Raeymaekers, R.A. de Callafon, and F.E. Talke, ISPS 08 – 18th Annual ASME Conference on Information Storage and Processing Systems, (June 16-17, 2008). [PDF]
17. “Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator, U. Boettcher, B. Raeymaekers, R.A. de Callafon, and F.E. Talke, ASME 9th Biennial Conference on Engineering Systems Design and Analysis, July 7-9, 2008, Haifa, Israel, ( July 2008), pp. 495-500.0.
18. “Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator”, U. Boettcher, B. Raeymaekers, R.A. de Callafon, and F.E. Talke, IEEE Transactions on Magnetics, Vol. 45, No. 7, pp. 3017-3024, (July 2009), [PDF UCSD only]
19. “Design of a Dual Stage Actuator Tape Head with High-Bandwidth Track Following Capability”, B. Raeymaekers, M.R. Graham, R. A. de Callafon, and F.E. Talke, Microsystems Technologies, Vol. 15, No. 10-11, pp. 1525-1529, (October 2009), [PDF UCSD only]
20. “Data Based Modeling and Control of a Dual-Stage Actuator Hard Disk Drive”, U. Boettcher, R.A. de Callafon, and F.E. Talke, 2009 Joint 48th IEEE Conference on Decision and Control (CDC) and 28th Chinese Control Conference (CCC 2009), pp. 8316-8321, (December 2009).

2010

21. “Modeling and Control of a Dual Stage Actuator Hard Disk Drive”, U. Boettcher, R.A. de Callafon, and F.E. Talke, Journal of Advanced Mechanical Design, Systems and Manufacturing, Vol. 4, No. 1, pp. 107-118, (January 2010), [PDF UCSD only]
22. “Servo Signal Data Processing for Flying Height Control in Hard Disk Drives”, U. Boettcher, C.A. Lacey, R.A. de Callafon and F.E. Talke, ASME Information Storage and Processing Systems Conference, Santa Clara, CA, (June 14-15, 2010).
23. “Closed-Lloop Iinput Shaping in Discrete-Time LTI Systems”, U. Boettcher, R.A. de Callafon, and F.E. Talke, ASME Information Storage and Processing Systems Conference, Santa Clara, CA, (June 14-15, 2010).

2011

24. “Servo Signal Processing for Flying Height control in Hard Disk Drives”, U. Boettcher, C. A. Lacey, H. Li, K. Amemiya, R. A. de Callafon, and F. E. Talke, Microsystem Technologies, Vol. 17, No. 5-7, pp. 937-944, (June 2011). [PDF UCSD only]
25. "Analytical Read Back Signal Modeling in Magnetic Recording”, U. Boettcher, C. A. Lacey, H. Li, K. Amemiya, R. A. de Callafon, and F. E. Talke, Microsystem Technologies, Vol. 17, No. 5-7, pp. 997-1002, (June 2011). [PDF UCSD only]
26. “Dynamic Flying Height Adjustment in Hard Disk Drives Through Feedforward Control”, U. Boettcher, H. Li, R.A. de Callafon, and F. E. Talke, IEEE Transactions on Magnetics, Vol. 47, No. 7, pp. 1823-1829, (July 2011) [PDF UCSD only]
27. “Closed-Loop Identification of Hammerstein Systems Using Iterative Instrumental Variables”, Han, Y. and de Callafon, R.A., Prepr. 18th IFAC World Congress, pp. 13930-13935, Milan, Italy, (August 2011). [PDF UCSD only]
28. “A Covariance-Based Realization Algorithm for the Identification of Aeroelastic Dynamics from In-Flight Data”, Miller, D.N. and de Callafon, R.A. and Brenner, M., Proc. AIAA Atmospheric Flight Mechanics Conference, pp. AIAA-2011-6207, 24 pages, Portland, OR, USA, (August 2011). [PDF UCSD only]
29. “Robust Estimation and Automatic Controller Tuning in Vibration Control of Time Varying Harmonic Disturbances”, Kinney, C. and Fang, H. and de Callafon, R.A. and Alma, M., Prepr. 18th IFAC World Congress, pp. 5401-5406, Milan, Italy, (August 2011). [PDF UCSD only]
30. “Optimal Feed Forward Profiles for Dynamic Flying Height Control in Hard Disk Drives”, Boettcher, U. and Li, H. and de Callafon, R.A. and Talke, F.E., Prepr. 18th IFAC World Congress, pp. 875-880, Milan, Italy, (August 2011). [PDF UCSD only]
31. “Efficient Identification of Input Dynamics for Correlation Function-Based Subspace Identification”, Miller, D.N. and de Callafon, R.A., Prepr. 18th IFAC World Congress, pp. 6511-6516, Milan, Italy, (August 2011). [PDF UCSD only]
32. “Suppression of the Aeroelastic/Aeroservoelastic Interaction Using Adaptive Feedback Control Instead of Notching Filters”, Zeng, J. and Wang, J. and de Callafon, R.A. and Brenner, M., Proc. AIAA Atmospheric Flight Mechanics Conference, pp. AIAA-2011-6459, 20 pages, Portland, OR, USA, (August 2011). [PDF UCSD only]
33. “The Internal Model Principle for Periodic Disturbances with Rapidly Time-Varying Frequencies”, C.E. Kinney and R.A. de Callafon, International Journal of Adaptive Control and Signal Processing, Vol. 25, No. 11, pp. 1006-1022, (November 2011) [PDF UCSD only]
34. “Output Error Identification of Closed-Loop Hammerstein Systems”, Y. Han, and R. A. de Callafon, Proc. 50th IEEE Conference on Decision and Control and European Control Conference, pp. 5774-5779, Orlando, FL, USA, (December 2011). [PDF UCSD only]
35. “Nonlinear Simultaneous Input and State Estimation with Application to Flow Field Estimation”, H. Fang, and R. A. de Callafon, Proc. 50th IEEE Conference on Decision and Control and European Control Conference, pp. 6013-6018, Orlando, FL, USA, (December 2011). [PDF UCSD only]

2012

36. “Reference Signal Shaping for Closed-Loop Systems With Application to Seeking in Hard Disk Drives”, U. Boettcher, D. Fetzer, H. Li, R. A. de Callafon, and F. E. Talke, IEEE Trans. on Control Systems Technology, Vol. 20, No. 2, pp. 335-345, (2012). [PDF UCSD only]
37. “On the asymptotic stability of minimum-variance unbiased input and state estimation”, Fang, Huazhen, and Raymond A. De Callafon, Automatica, (2012).
38. “Identification of Wiener–Hammerstein benchmark model via rank minimization”, Han, Younghee, and Raymond A. de Callafon, Control Engineering Practice, (2012).
39. “Nonlinear Gaussian filtering via radial basis function approximation”, Fang, Huazhen, Jia Wang, and Raymond A. de Callafon, Decision and Control (CDC), 2012 IEEE 51st Annual Conference on, pp. 6042-6047. IEEE, (2012).

Graduate Student: Younghee Han