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Reed D Hanson, 632374 Manuela Dr, Chaska, MN 55318

Known as:
Reed D Larson
Related to:
Amanda M Stram 39 Douglas M Hanson 68 Ramona Hanson Tonya Hanson 46 Ricky D Fisher 70 Robert Hanson 97 Matthew R Hanson 37

Reed Hanson Phones & Addresses

2374 Manuela Dr, Chaska, MN 55318    952-4489946   

Adams, MN   

New Germany, MN   

Urbana, IL   

Minneapolis, MN   

Champaign, IL   

Dayton, OH   

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Reed D Hanson

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Work

Company: Seagate technology 1997 Position: Principal engineer

Education

Degree: Doctorates, Doctor of Philosophy School / High School: University of Illinois at Urbana - Champaign 1996 to 1996 Specialities: Philosophy, Mechanical Engineering

Skills

Matlab • Control Systems Design • Simulations • Mathematical Modeling • Engineering • C • Firmware • Design of Experiments • Algorithm Design • Testing • Embedded Systems • Product Development • Digital Signal Processing • Instrumentation • Six Sigma • Project Management • Simulink • Hands on Technical Leadership • Data Analysis • Solidworks • Failure Mode and Effects Analysis

Industries

Computer Hardware
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Mentions for Reed D Hanson

Resumes & CV records

Resumes

Reed Hanson Photo 30

Principal Engineer

Location:
Chaska, MN
Industry:
Computer Hardware
Work:
Seagate Technology
Principal Engineer
Education:
University of Illinois at Urbana - Champaign 1996 - 1996
Doctorates, Doctor of Philosophy, Philosophy, Mechanical Engineering Iowa State University
Masters, Engineering Iowa State University
Bachelors, Mechanical Engineering
Skills:
Matlab, Control Systems Design, Simulations, Mathematical Modeling, Engineering, C, Firmware, Design of Experiments, Algorithm Design, Testing, Embedded Systems, Product Development, Digital Signal Processing, Instrumentation, Six Sigma, Project Management, Simulink, Hands on Technical Leadership, Data Analysis, Solidworks, Failure Mode and Effects Analysis

Publications & IP owners

Us Patents

Single-Sided Unipolar Device Driver For A Piezoelectric Transducer In A Disc Drive

US Patent:
6744589, Jun 1, 2004
Filed:
May 2, 2001
Appl. No.:
09/847758
Inventors:
John C. Morris - Minneapolis MN
Reed D. Hanson - Chaska MN
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B 5596
US Classification:
360 7805, 360 7702, 360 7804
Abstract:
A disc drive including a rotatable data track, a dual-stage actuator with a primary actuator motor supporting an actuator arm, a read/write head supported by the actuator arm and communicating with a secondary actuator motor, and steps for controlling range of motion of the secondary actuator motor. The controlling steps include supplying and sustaining a bias signal to a single-sided unipolar device driver that then apply a bias voltage the secondary actuator motor to induce the secondary actuator motor to expand substantially one half of its expansion capabilities. And, confining correction signals provided by a control circuit of the disc drive, used in correcting mechanical position of the secondary actuator motor, to a voltage ranging substantially between a positive â+â and negative â-â voltage substantially equal to the applied bias voltage.

Efficient Feedforward Compensation For Repeatable Runout In A Disc Drive

US Patent:
6867943, Mar 15, 2005
Filed:
Jun 26, 2002
Appl. No.:
10/180569
Inventors:
Brent Jay Harmer - Johnstown CO, US
Jianbo J. He - Longmont CO, US
Khalil B. Dizaji - Louisville CO, US
Hai Thanh Ho - Broomfield CO, US
Reed David Hanson - Chaska MN, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B005/596
US Classification:
360 7704
Abstract:
Method and apparatus for more accurate track following. Control circuitry rotates a data storage surface containing thousands of annular tracks. A “measured” subset of the tracks is selected so as to be interspersed with an “unmeasured” subset. The calibration profile is derived based on position error signals each obtained by reading from the measured subset and not from the unmeasured subset. Data from the unmeasured subset of tracks is ignored, in generating and/or updating the profile.

Compensation For Timing Variation In Disc Drives Employing Servo Tracking Systems

US Patent:
6882487, Apr 19, 2005
Filed:
Jun 27, 2002
Appl. No.:
10/183680
Inventors:
Reed D. Hanson - Chaska MN, US
Timothy F. Ellis - Tonka Bay MN, US
Dustin M. Cvancara - St. Paul MN, US
Nathaniel B. Wilson - Edmond OK, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B027/30
G11B019/247
US Classification:
360 51, 360 7303
Abstract:
An apparatus and method for compensating for variation in sample rate in a disc drive having a rotating disc and a head that is positioned over the rotating disc is provided. The disc includes at least one track that has multiple consecutive sectors. A sample rate value between timing marks of each pair of consecutive sectors of the multiple consecutive sectors is computed to obtain a sequence of sample rate values. A sequence of timing error values is computed as a function of the sequence of sample rate values and a nominal sample rate value. Data related to the sequence of timing error values is utilized to compensate for variation in sample rate values.

Guiding A Sensor Using A Broadly-Curved Lateral Profile

US Patent:
6930851, Aug 16, 2005
Filed:
Jun 26, 2003
Appl. No.:
10/607568
Inventors:
Reed David Hanson - Chaska MN, US
John Christopher Morris - Eden Prairie MN, US
Thomas Christopher Zirps - Minneapolis MN, US
Nathaniel Boyd Wilson - Edmond OK, US
Brent Jay Harmer - Johnstown CO, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B005/596
US Classification:
360 7704, 700 45
Abstract:
Problems inherent in guiding a sensor via a piecewise-linear lateral parametric profile are generally avoided using at least one broadly curved, generally lateral profile (). A sensor is configured to move in a nominally longitudinal direction relative to a frame of reference (). A position scale is defined in a generally lateral direction relative to the longitudinal motion (). Each broadly curved lateral profile is defined in terms of its corresponding position scale, the scale(s) and the profile(s) both being part of a parametric model that is available for use in guiding the sensor ().

Virtual Tracks For Repeatable Runout Compensation

US Patent:
6952320, Oct 4, 2005
Filed:
Dec 8, 2000
Appl. No.:
09/733405
Inventors:
Brian Pollock - Eden Prairie MN, US
Alexei H. Sacks - Edina MN, US
Brian Sudman - Eden Prairie MN, US
James H. McGlennen - Eden Prairie MN, US
Reed D. Hanson - Chaska MN, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B005/596
G11B015/12
US Classification:
360 7704, 360 63
Abstract:
The present invention relates to repeatable runout (RRO) compensation of servo control systems that can be used in disc drives or spin-stands. The RRO relates to eccentricity between servo tracks, which were written onto a disc prior to the installation of the disc into the disc drive or spin-stand, and an axis of rotation of the disc. The present invention compensates the servo control loop by canceling the RRO and controlling a head to follow virtual tracks which are eccentric to the data tracks defined by the servo tracks and concentric with the axis of rotation of the disc.

Fractional-Rate Feedforward Rro Compensator

US Patent:
6956711, Oct 18, 2005
Filed:
Sep 2, 2003
Appl. No.:
10/653505
Inventors:
Reed David Hanson - Chaska MN, US
Nathaniel Boyd Wilson - Edmond OK, US
John Christopher Morris - Eden Prairie MN, US
Thomas Christopher Zirps - Minneapolis MN, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B005/596
US Classification:
360 7704, 360 7708
Abstract:
An apparatus and method of tracking repeatable runout in a disc drive servo loop is provided in which a feedforward signal having harmonic components that are updated at a sample rate that is a fraction of a servo sector sample rate is employed during track following.

Monitoring A Sensor's Output Using A Target Window That Is Based On A Longitudinal Offset's Position-Dependent Indicator

US Patent:
7092184, Aug 15, 2006
Filed:
Apr 15, 2003
Appl. No.:
10/413828
Inventors:
Christopher Thomas Settje - Westminster CO, US
David Louis Schell - Ft. Collins CO, US
Steven Alan Koldewyn - Berthoud CA, US
Reed Hanson - Chaska MN, US
Timothy Francis Ellis - Tonka Bay MN, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B 5/09
US Classification:
360 51, 360 75, 360 7704, 360 7705, 360 7302
Abstract:
Using a “reference” sensor, a reference position is detected in a frame of reference that is moving along a predetermined path relative to the reference sensor. The reference position is used to derive a position-dependent indicator of a position-dependent “longitudinal” offset component (i. e. along the path). An output from the target sensor is monitored using a “target window” that is partially based on the position-dependent indicator.

Method And Apparatus For Tracking Radially-Dependent Repeatable Run-Out

US Patent:
7119981, Oct 10, 2006
Filed:
Jun 28, 2002
Appl. No.:
10/184702
Inventors:
Reed D. Hanson - Chaska MN, US
Nathaniel B. Wilson - Edmond OK, US
John C. Morris - Minneapolis MN, US
Timothy F. Ellis - Tonka Bay MN, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G11B 5/596
G11B 5/55
US Classification:
360 7704, 360 7804
Abstract:
An apparatus and method for tracking radially-dependent repeatable run-out in a disc drive having a servo loop for positioning a head over a rotating disc is provided. The disc includes multiple tracks. Radially-dependent repeatable run-out control components for at least a subset of the multiple tracks are first determined. Data representative of the radially-dependent repeatable run-out control components for the subset of the multiple tracks is then stored. The stored data representative of the radially-dependent repeatable run-out control components is retrieved before settling on the target track, and subsequently used to follow the selected track.

Possible Relatives

Cynthia A Hanson  David A Hanson  Dawn E Hanson  Dayna L Hanson  Dean C Hanson  Deanna M Hanson  Daisy M Hanson  Reed Johnson  Reed P Stanley  Reed M Kiefer 

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