Center for Magnetic Recording Research

Research Interests

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

Biography

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.

Publications

CMRR Related Publications

R.A. de Callafon, D.H.F. Harper, R.E. Skelton, and F.E. Talke, “Experimental Modeling and Feedback Control of a Piezobased Milliactuator,” Journal of Information Storage and Processing Systems, Vol. 1, No. 3, pp. 217-24, (July 1999)

D.H.F. Harper, R.A. de Callafon, R.E. Skelton, and F.E. Talke, “Piezoelectric Stack-Based Microactuator for Hard Disk Drives,” Journal of Information Storage and Processing Systems, Vol. 1, No. 4, pp. 329-32, (December 1999)

M. Rotunno, and R.A. de Callafon, “Fixed Order H∞ Control Design for Dual-Stage Hard Disk Drives,” Proceedings of the 39th Conference on Decision and Control 2000, Vol. 4, pp. 3118-3119, (December 2000)  [PDF  uscd only]

M. Rotunno, R.A. de Callafon, and F.E. Talke, “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, (September 2003) [PDF  ucsd only]

A.P. Teerjuis, S.J.M. Cools, and R.A. de Callafon, “Reduction of Flow-Induced Suspension Vibrations in a Hard Disk Drive by Dual-Stage Suspension Control,” IEEE Transactions on Magnetics, Vol. 39, No. 5, pp. 2237-2239, (September 2003)       [PDF  ucsd only]

J. Zeng, and R.A. de Callafon, “Servo Experiments for Modeling of Actuator and Windage Dynamics in a Hard Disk Drive,” Proc. IEEE International Conference on Mechatronics, Istanbul, Turkey, pp. 218-223, (June 2004)  [PDF  ucsd only]

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,” Tribology International, Vol. 38, No. 6-7, pp. 625-632, (June-July 2005)   [PDF  ucsd only]

2006

R.A. de Callafon, R. Nagamune, and R. Horowitz,  “Robust Dynamic Modeling and Control of Dual-Stage Actuators,” IEEE Transactions on Magnetics, Vol. 42, No. 2, pp. 247-254, (February 2006) [PDF  ucsd only]

M.R. Graham, and R.A. de Callafon, “An Iterative Learning Design for Repeatable Runout Cancellation in Disk Drives,” IEEE Transactions on Control Systems Technology, Vol. 14 No. 3, pp. 474-482, (May 2006) [PDF ucsd only]

M.R. Graham, and R.A. De Callafon, “Identification and Low-Order Control of Hard Disk Drives,” IEEE International Magnetics conference Intermag 2006, p.606, (May 2006) [PDF  ucsd only]

M.R. Graham, R.A. de Callafon, and L. Shrinkle, “An Iterative Learning Controller for Reduction of Repeatable Runout in Hard Disk Drives,” American Control Conference 2006, pp. 576-581, (June 2006)  [PDF  ucsd only]

M. Rotunno, R. Oboe, and R.A. de Callafon,   “Modeling Product Variations in Hard Disk Drive Micro-Actuator Suspensions,” Microsystem Technologies, Vol. 12, No. 9, pp. 803-813, (August 2006)     [PDF  ucsd only]

J. Zeng, and R.A. de Callafon, “Control relevant estimation of plant and disturbance dynamics - model approximation on the basis of closed-loop data,” Automatica,  Vol. 42, No. 11, pp 1951-1957, (November 2006) . [PDF  ucsd only]

2007

M. Claes, M.R.Graham, and R.A. de Callafon, “Frequency Domain Subspace Identification of a Tape Servo System,”

Microsystem Technologies, Vol.13, No.8-10, pp. 1439-47, (May 2007)  [PDF  ucsd only]

R. Antonello, R. Oboe, and R.A. de Callafon, “An Identification Experiment for Simultaneous Estimation of Low-Order Actuator and Windage Models in a Hard Disk Drive,” IEEE International Symposium on Industrial Electronics 2007,
pp. 3102-3107, (June 2007)  [PDF  ucsd only]

U. Boettcher, B. Raeymaekers, R.A. de Callafon, and F.E. Talke, “Design of a Dual Stage Actuator Tape Head Controller,” ISPS’08 – 18th Annual ASME Conference on Information Storage and Processing Systems, (June 16-17, 2008). [PDF]

U. Boettcher, B. Raeymaekers, R.A. de Callafon, and F.E. Talke, “Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator, ASME 9th Biennial Conference on Engineering Systems Design and Analysis, July 7-9, 2008, Haifa, Israel, ( July 2008), pp. 495-500.0.

U. Boettcher, B. Raeymaekers, R.A. de Callafon, and F.E. Talke, “Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator," IEEE Transactions on Magnetics, Vol. 45, No. 7, pp. 3017-3024, (July 2009), , [PDF  ucsd only]

B. Raeymaekers, M.R. Graham, R. A. de Callafon, and F.E. Talke, “Design of a Dual Stage Actuator Tape Head with High-Bandwidth Track Following Capability,” Microsystems Technologies, Vol. 15, No. 10-11, pp. 1525-1529, (October 2009), [PDF ucsd only]

U. Boettcher, R.A. de Callafon, and F.E. Talke, “Data Based Modeling and Control of a Dual-Stage Actuator Hard Disk Drive,” 2009 Joint 48th IEEE Conference on Decision and Control (CDC) and 28th Chinese Control Conference (CCC 2009), pp. 8316-8321, (December 2009).

2010

U. Boettcher, R.A. de Callafon, and F.E. Talke, “Modeling and Control of a Dual Stage Actuator Hard Disk Drive,” Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol. 4, No. 1, pp. 107-118, (January 2010), [PDF  ucsd only]

U. Boettcher, C.A. Lacey, R.A. de Callafon and F.E. Talke, “Servo Signal Data Processing for Flying Height Control in Hard Disk Drives,” ASME Information Storage and Processing Systems Conference, Santa Clara, CA, (June 14-15, 2010).

U. Boettcher, R.A. de Callafon, and F.E. Talke, “Closed-Lloop Iinput Shaping in Discrete-Time LTI Systems,” ASME Information Storage and Processing Systems Conference, Santa Clara, CA, (June 14-15, 2010). 

2011

U. Boettcher, C. A. Lacey, H. Li, K. Amemiya, R. A. de Callafon, and F. E. Talke, “Servo Signal Processing for Flying Height control in Hard Disk Drives,” Microsystem Technologies, Vol. 17, No. 5-7, pp. 937-944, (June 2011). [PDF  ucsd only]

U. Boettcher, C. A. Lacey, H. Li, K. Amemiya, R. A. de Callafon, and F. E. Talke, "Analytical Read Back Signal Modeling in Magnetic Recording," Microsystem Technologies, Vol. 17, No. 5-7, pp. 997-1002, (June 2011). [PDF ucsd only]

U. Boettcher, H. Li, R.A. de Callafon, and F. E. Talke, “Dynamic Flying Height Adjustment in Hard Disk Drives Through Feedforward Control,”  IEEE Transactions on Magnetics, Vol. 47, No. 7, pp. 1823-1829, (July 2011) [PDF ucsd only]

C.E. Kinney and R.A. de Callafon, "The Internal Model Principle for Periodic Disturbances with Rapidly Time-Varying Frequencies," International Journal of Adaptive Control and Signal Processing, Vol. 25, No. 11, pp. 1006-1022, (November 2011) [PDF ucsd only]

Pending

Research Group

Graduate Students

Student Name: Matthew Graham

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Student Name: Charles Kinney

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