Dynamic Head-Disk Interface Modeling and Adaptive Control of a Hybrid Actuator for Optical Data Storage Systems

In the near-field recording (NFR) system, the gap between the lens and disk will drop down to 100 nm. However, the disk vibration and force disturbance make it difficult to maintain the desired flying height during disk operation, and the lens-disk collision can easily occur. It is proposed in this article to design a hybrid actuator system which combines both advantages of the flying slider used in hard disk drives and the voice coil actuator used in optical disk drives. The dynamic head-disk interface model of the hybrid actuator is first developed, then an adaptive regulation approach is proposed to control the flying height at its desired value despite the unknown disturbances. Simulation and experimental results are presented to illustrate the effectiveness of the proposed flying height control approach.

[1]  Chung Choo Chung,et al.  Control Methods in Data-Storage Systems , 2012, IEEE Transactions on Control Systems Technology.

[2]  Young-Pil Park,et al.  Effect of Air Bearing Surface on Shock Resistance of Optical Head for Solid Immersion Lens Based Near Field Recording System , 2009, IEEE Transactions on Magnetics.

[3]  Sung-Chang Lee,et al.  Dynamic Head-Disk Interface Instabilities With Friction for Light Contact (Surfing) Recording , 2009, IEEE Transactions on Magnetics.

[4]  F. Zijp,et al.  Near field optical data storage , 2007 .

[5]  Dante C. Youla,et al.  Modern Wiener-Hopf Design of Optimal Controllers. Part I , 1976 .

[6]  No-Cheol Park,et al.  Prospect of Recording Technologies for Higher Storage Performance , 2011, IEEE Transactions on Magnetics.

[7]  Ioan Doré Landau,et al.  Adaptive Suppression of Multiple Time-Varying Unknown Vibrations Using an Inertial Actuator , 2011, IEEE Transactions on Control Systems Technology.

[8]  Zhizheng Wu,et al.  Adaptive regulation in bimodal linear systems , 2010 .

[9]  Jun-Hee Lee,et al.  Optical flying head mounted on four-wire type actuator , 2004 .

[10]  Ioan Doré Landau,et al.  Benchmark on adaptive regulation - rejection of unknown/time-varying multiple narrow band disturbances , 2013, Eur. J. Control.

[11]  Dante C. Youla,et al.  Modern Wiener--Hopf design of optimal controllers Part I: The single-input-output case , 1976 .

[12]  Zhizheng Wu,et al.  Youla parameterized adaptive regulation against sinusoidal exogenous inputs applied to a benchmark problem , 2013, Eur. J. Control.

[13]  N Tagawa,et al.  Experimental Study of Head-Disk Interface Instability on Light Contact Recording Using Dynamic Flying Height Control , 2011, IEEE Transactions on Magnetics.

[14]  M. Tomizuka,et al.  Comparison of four discrete-time repetitive control algorithms , 1993, IEEE Control Systems.

[15]  Jung Rae Ryoo,et al.  Robust disturbance observer for the track-following control system of an optical disk drive , 2004 .

[16]  A. Galip Ulsoy,et al.  Adaptive Sinusoidal Disturbance Rejection in Linear Discrete- Time Systems— Part II: Experiments , 1999 .

[17]  Kohei Iida,et al.  Dynamic Characteristics and Design Consideration of a Tripad Slider in the Near-Contact Regime , 2002 .

[18]  A. G. Ulsoy,et al.  Adaptive Sinusoidal Disturbance Rejection in Linear Discrete-Time Systems—Part I: Theory , 1999 .

[19]  Chung Choo Chung,et al.  A Survey of Control Issues in Optical Data Storage Systems , 2011 .

[20]  John B. Moore,et al.  High Performance Control , 1997 .

[21]  L. H. Diaz-Saldierna,et al.  Disturbance Rejection Control Scheme for Optical Disk Drive Systems , 2010, IEEE Transactions on Magnetics.

[22]  Carl J. Kempf,et al.  Disturbance observer and feedforward design for a high-speed direct-drive positioning table , 1999, IEEE Trans. Control. Syst. Technol..