A nonlinearity specification for constructing the servo position error signal

Author

Cooper, Evert

Author_Institution

Texas Instrum. Inc., San Jose, CA, USA

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

1104

Lastpage

1115

Abstract

A high performance disk file actuator servo requires a position transducer whose response is linear with displacement. Two concerns that detrimentally affect positional linearity are the nonlinear response of the burst detector to burst amplitude and the nonuniform sensitivity of the magnetic read element across its pole faces. Nonuniform field sensitivity is of particular concern with the advent of magneto resistive heads for embedded servo systems, and this paper gives specification for both for good actuator positioning

Keywords

electric actuators; error analysis; magnetic heads; magnetic recording; magnetoresistive devices; position control; position measurement; servomechanisms; burst amplitude; burst detector; displacement; embedded servo systems; good actuator positioning; high performance disk file actuator servo; magnetic disk drive controls; magnetic head positioning system; magnetic read element; magneto resistive heads; nonlinear response; nonlinearity specification; nonuniform field sensitivity; nonuniform sensitivity; pole faces; position transducer; positional linearity; response; servo position error signal; Face detection; Hydraulic actuators; Linearity; Magnetic heads; Magnetic properties; Magnetic recording; Servomechanisms; Signal processing; Transducers; Tunneling magnetoresistance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.558534

Filename

558534