Modeling and compensator designs for self-servowriting in disk drives

Melkote, Hemant; Cloke, B.; Agarwal, Vineeta

doi:10.1109/acc.2003.1239109

Cited by 12 publications

(8 citation statements)

References 8 publications

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“…We note that in [6], based on a predesigned feedback control, a feedforward control is designed to contain the error propagation and in [8], an observer-based 2-D control is designed by using a 1-D pole placement method. Different from these ad hoc methods, this brief proposes a systematic 2-D control design method.…”

Section: Introductionmentioning

confidence: 99%

$H_2$ Control for Head Positioning in Axial and Radial Dimensions for Self-Servo Track Writing

Xie²,

Teoh³

et al. 2008

IEEE Trans. Contr. Syst. Technol.

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The self-servo track writing (SSTW) process for hard disk drives (HDDs) consists of axial (or time) and radial (or track) dimensions and is described by using a 2-D model. Within the 2-D system framework, the error propagation containment problem of the SSTW is formulated as a 2-D stabilization problem, and the position error minimization problem is formulated as a 2-D H 2 control problem. The adopted 2-D controller is designed with the easily implemented linear matrix inequality (LMI) approach. With the stored error information of the preceding track, the 2-D control scheme is realizable. The simulation results demonstrate that the error propagation is prevented by the 2-D control scheme and the positioning accuracy is remarkably improved by the 2-D H 2 control scheme. Also, servo performance is evaluated with the 1-D controller in time dimension, obtained from the designed 2-D controller.

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Section: Introductionmentioning

confidence: 99%

$H_2$ Control for Head Positioning in Axial and Radial Dimensions for Self-Servo Track Writing

Xie²,

Teoh³

et al. 2008

IEEE Trans. Contr. Syst. Technol.

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“…Linear matrix inequality (LMI) approaches are applied to design the 2-D controllers [3]. The design method is easily implemented and different from the state-estimator based 1-D design method in [9]. With the stored error information of previous track, the 2-D control scheme is realizable.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional Control of Self-servo Track Writing for Hard Disk Drives

Xie

Teoh

et al. 2006

2006 9th International Conference on Control, Automation, Robotics and Vision

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Self-servo track writing (SSTW) process for hard disk drives (HDDs) is described by using a two-dimensional (2-D) model, with which the error propagation containment problem of the SSTW is formulated as 2-D stabilization problem, and the position error minimization problem is formulated as 2-D H2 control problem. The adopted 2-D controller is designed with easily implemented linear matrix inequality (LMI) approach. With the stored error information of previous track, the 2-D control scheme is realizable. The simulation results demonstrate that the error propagation is prevented by the 2-D control scheme and the positioning accuracy is remarkably improved by the 2-D H2 control scheme. Also, from the 2-D controller servo performance is evaluated in usually concerned 1-D sense.

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“…As noted in the introduction, repetitive processes arise in both physical examples (recently another application has arisen in self-servo writing in disk drives [10]) and in the so-called algorithmic applications already referred to in the introduction to this paper. Hence it is essential to complement the work on stability and systems theoretic properties with the development of control schemes.…”

Section: Theorem 1 Discrete Linear Repetitive Processes Described By mentioning

confidence: 99%

Control and Disturbance Rejection for Discrete Linear Repetitive Processes

Sulikowski

Gałkowski

Rogers

et al. 2005

Multidim Syst Sign Process

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Repetitive processes are a distinct class of 2D systems (i.e. information propagation in two independent directions) of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed 1D here) or 2D systems theory. Here we give new results on the relatively open problem of the design of physically based feedforward/feedback control laws to achieve desired performance and disturbance decoupling in the sense defined in the body of the paper.

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Modeling and compensator designs for self-servowriting in disk drives

Cited by 12 publications

References 8 publications

$H_2$ Control for Head Positioning in Axial and Radial Dimensions for Self-Servo Track Writing

$H_2$ Control for Head Positioning in Axial and Radial Dimensions for Self-Servo Track Writing

Two-dimensional Control of Self-servo Track Writing for Hard Disk Drives

Control and Disturbance Rejection for Discrete Linear Repetitive Processes

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