Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reissue Patent
2008-07-01
2008-07-01
Wellington, Andrea (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S053000, C369S043000
Reissue Patent
active
11067616
ABSTRACT:
Apparatus using information about the extent of errors in sensed data for performing as a control function at least one of adjusting the position of a magnetic head to improve alignment relative to a track and selecting from two or more data signals a data signal having the least amount of errors is shown. The apparatus uses information about the extent of errors to perform a control function for reproducing the data stored in predetermined storage locations in a storage media. The apparatus positions a transducer for sensing from predetermined storage locations stored data containing at least one constraint. The transducer generates a first signal representative of the data containing at least one constraint stored in the sensed data and any errors introduced into the sensed data during the sensing. An input device, preferably in the form of a detector is responsive to the first signal for generating a control signal containing information about the extent of errors in the sensed data and for extracting a data signal. The control signal is used for performing the above control functions. A method for using information about the extent of errors for a control function to improve the extracted data stored at the predetermined storage locations is also shown.
REFERENCES:
patent: 4056830 (1977-11-01), Smith
patent: 4204234 (1980-05-01), Noble
patent: 4404676 (1983-09-01), DeBenedictis
patent: 4445153 (1984-04-01), Fujimoto et al.
patent: 4499510 (1985-02-01), Harding et al.
patent: 4563713 (1986-01-01), Cahoon et al.
patent: 4642709 (1987-02-01), Vinal
patent: 4701815 (1987-10-01), Yada et al.
patent: 4772963 (1988-09-01), Van Lahr et al.
patent: 4816938 (1989-03-01), Cowen et al.
patent: 4816947 (1989-03-01), Vinal et al.
patent: 4890172 (1989-12-01), Watt et al.
patent: 4920442 (1990-04-01), Dimmick
patent: 4924160 (1990-05-01), Tung
patent: 5073834 (1991-12-01), Best et al.
patent: 5163162 (1992-11-01), Berry et al.
patent: 5189572 (1993-02-01), Gooch
patent: 5233487 (1993-08-01), Christensen et al.
patent: 5490091 (1996-02-01), Kogan et al.
patent: 5499232 (1996-03-01), Hardwick
patent: 5523902 (1996-06-01), Pederson
patent: 5541783 (1996-07-01), Yamamoto et al.
patent: 5585975 (1996-12-01), Bliss
patent: 5668678 (1997-09-01), Reed et al.
patent: 5677809 (1997-10-01), Kadlec
patent: 5717538 (1998-02-01), Cheung et al.
patent: 5724205 (1998-03-01), Choi
patent: 5754353 (1998-05-01), Behrens et al.
patent: 5796543 (1998-08-01), Ton-That
patent: 5825579 (1998-10-01), Cheung et al.
patent: 5841601 (1998-11-01), Fisher
patent: 5847894 (1998-12-01), Blank et al.
patent: 5909661 (1999-06-01), Abramovitch et al.
patent: 5930448 (1999-07-01), Lee et al.
patent: 5938790 (1999-08-01), Marrow
patent: 5946156 (1999-08-01), Schwarz et al.
patent: 5949603 (1999-09-01), Brown et al.
patent: 5949605 (1999-09-01), Lee et al.
patent: 5961658 (1999-10-01), Reed et al.
patent: 6157510 (2000-12-01), Schreck et al.
patent: 39 00 683 (1990-07-01), None
patent: 197 12 568 (1998-01-01), None
patent: 0 298 475 (1988-07-01), None
patent: 0 331 189 (1989-03-01), None
patent: 61104358 (1986-05-01), None
patent: 04089654 (1992-03-01), None
patent: 08036811 (1996-02-01), None
patent: 10011844 (1998-01-01), None
patent: WO 99/36907 (1999-07-01), None
patent: PCT/US/99/26036 (2000-03-01), None
L. N. He, et al., “Estimation of Track Misregistration by Using Dual-Stripe Magnetoresistive Heads,” IEEE Transactions on Magnetics, vol. 34, No. 4, pp. 2348-2355, Jul. 1998.
G. F. Franklin, et al., “Design of a Disk Drive Servo: A Case Study,” Digital Control of Dynamic Systems 3rdEdition, pp. 649-689, 1998.
E. Grochowski, et al., “Future Trends In Hard Disk Drives,” IEEE Transactions on Magnetics, vol. 32, pp. 1850-1854, 1996.
S. E. Baek, “Design of a Multi-Rate Estimator And Its Application to a Disk Drive Servo System,” Proc. Amer. Contr. Conf., San Diego, CA, pp. 3640-3644, Jun. 1999.
X. Hu, et al., “Discrete-Time LQG/LTR Dual-Stage Controller Design And Implementation For High Track Density HDDs,” Proc. Amer. Contr. Conf., San Diego, CA, pp. 4111-4115, Jun. 1999.
S. Hara, et al., “Two-Degree-of-Freedom Controllers For Hard Disk Drives With Novel Reference Signal Generation”, Proc. Amer. Contr. Conf., San Diego, CA, pp. 4132-4136, Jun. 1999.
M. T. White, et al., “Rejection of Disk Drive Vibration And Shock Disturbances Observer,” Proc. Amer. Contr. Conf., San Diego, CA, pp. 4127-4131, Jun. 1999.
D. Hernandez, “Dual-Stage Track-Following Servo Design For Hard Disk Drives,” Proc. Amer. Contr. Conf., San Diego, CA, pp. 4116-4121, Jun. 1999.
J. Li, et al., “Rejection of Repeatable And Non-Repeatable Disturbances For Disk Drive Actuators,” Proc. Amer. Contr. Conf., San Diego, CA, pp. 3615-3619, Jun. 1999.
Y. Huang, et al., “Robustnes Analysis on a High Bandwidth Disk Drive Servo System With an Instrumental Suspension,” Proc. Amer. Contr. Conf., San Diego, CA, pp. 3620-3624, Jun. 1999.
Y. Huang, et al., “A Novel Disturbance Observer Design For Magnetic Hard Drive Servo System With a Rotary Actuator,” IEEE Transactions on Magnetics, vol. 34, No. 4, pp. 1892-1894, Jul. 1998.
Y. Mizoshita, et al., “Vibration Minimized Access Control For Disk Drives,” IEEE Transactions on Magnetics, vol. 32, No. 3, pp. 1793-1798, May 1996.
L. S. Fan, et al., “Magnetic Recording Head Positioning at Very High Track Densities Using a Microactuator-Based, Two-Stage Servo System,” IEEE Transactions on Industrial Electronics, vol. 42, No. 3, pp. 222-223, Jun. 1995.
W. Guo, et al., “A High Bandwidth Piezoelectric Suspension For High Track Density Magnetic Data Storage Devices,” IEEE Transactions on Magnetics, vol. 34, No. 4, pp. 1907-1909, Jul. 1998,
S. Koganezawa, et al., “Dual-Stage Actuator System For Magnetic Disk Drives Using a Shear Mode Piezoelectric Microactuator,” IEEE Transactions on Magnetics, vol. 35, No. 2, pp. 988-992, Mar. 1999.
K. Mori, et al., “A Dual-Stage Magnetic Disk Drive Actuator Using a Piezoelectric Device For a High Track Density,” IEEE Transactions on Magnetics, vol. 27, No. 6, pp. 5298-5300, Nov. 1991.
K. K. Chew, “Control System Challenges to High Track Density Magnetic Disk Storage,” IEEE Transactions on Magnetics, vol. 32, No. 3, pp. 1799-1804, May 1996.
L. Guo, “Reducing The Manufacturing Costs Associated With Hard Disk Drives—A New Disturbance Rejection Control Scheme,” IEEE/ASME Transactions on Mechatronics, vol. 2, No. 2, pp. 77-85, Jun. 1997.
S. Finch, et al., “Headerless Disk Formatting: Making Room For More Data,” Data Storage, pp. 51-54, Apr. 1997.
S. R. Hetzler, “No-ID Sector Format,” IBM Storage, pp. 1-3 Jan. 8, 1996.
L.N. He, et al., “Estimation of Track Misregistration by Using Dual-Stripe Magnetoresistive Heads,” IEEE Transactions on Magnetics, vol. 34, No. 4, pp. 2348-2355, Jul. 1998.
IBM Research, “The Giant Magnetoresistive Head: A Giant Leap for IBM Research,” http://www.research.ibm.com/research/gmr.html, pp. 1-2, Aug. 21, 1998.
Despain Alvin M.
Gaines R. Stockton
Davidson Dan I
McDonnell Boehnen & Hulbert & Berghoff LLP
Purchased Patent Management LLC
Wellington Andrea
LandOfFree
Method and apparatus for developing a dynamic servo signal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for developing a dynamic servo signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for developing a dynamic servo signal... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3927625