Dynamic Modeling and Control of a Piezo-Electric Dual-Stage Tape Servo Actuator

Boettcher, Uwe; Raeymaekers, Bart; Callafon, Raymond A. de; Talke, Frank E.

doi:10.1109/tmag.2009.2015050

Cited by 28 publications

(5 citation statements)

References 24 publications

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“…The dual-stage linear actuator is based on a VCM that acts as a primary "coarse" actuator with large strokes, following low-frequency LTM, i.e., less than 1 kHz, and on a stacked piezoelectric (PZT) stage that acts as a secondary "fine" actuator with small strokes, compensating for high-frequency LTM. The controller design for the resulting dual-input, single-output (DISO) system is presented in [7]. The dual-stage controller is based on the so-called PQ method, which allows the decomposition of the DISO system into two single-input, single-output (SISO) systems, and addresses the coupling between the actuators by frequency separation [70].…”

Section: Track Followingmentioning

confidence: 99%

“…In tape drives, new control methods are needed to compensate the dynamic skew of the head relative to the moving tape by means of tilting rollers and/or actuators with more than one degree of freedom [6]. High-bandwidth piezoelectric actuators are considered for enhancing the performance of track-following loops in the presence of high-frequency lateral tape motion (LTM) [7]. In ODDs, near-field recording aims at reducing the size of the beam spot by increasing the numerical aperture of a focusing lens using solid immersion lens technology [8], [9].…”

mentioning

confidence: 99%

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Control Methods in Data-Storage Systems

Cherubini

Chung

Messner

et al. 2012

IEEE Trans. Contr. Syst. Technol.

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Abstract-The recording performance of data-storage devices, in which write/read elements move relative to a storage medium to reliably store and retrieve information, depends on the capability of servo mechanisms to provide the necessary positioning accuracy. The desired characteristics of servo mechanisms for datastorage systems include robustness against variations of environmental parameters, high resolution, accuracy, stability, and fast response. This paper presents a comprehensive overview of advanced servo-control methods for data storage. The applications are to well-established recording technologies, including magnetic tape and magnetic disk systems as well as CD/DVD/Blue-Ray optical data-storage systems. Moreover, newer holographic and nearfield optical systems and the emerging probe-storage technology are also addressed. Emphasis is given to the potential exhibited by the technologies considered for achieving ultra-high storage capacity, as required by the exploding demand in data-storage capacity for archival systems and massive multimedia data storage.Index Terms-Control systems, hard-disk drive, holographic data storage, optical-disk drive, scanning-probe data storage, servomechanism, tape drive.

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Section: Track Followingmentioning

confidence: 99%

mentioning

confidence: 99%

Control Methods in Data-Storage Systems

Cherubini

Chung

Messner

et al. 2012

IEEE Trans. Contr. Syst. Technol.

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“…The procedure used in this paper has been previously reported in (22) and (23) . The singular value decomposition (SVD) is applied to the weighted Hankel matrix H w defined by…”

Section: Modeling and System Identificationmentioning

confidence: 99%

“…Here, P is defined as the ratio of the VCM and the PZT model and the compensator Q is defined in the same manner. Application examples of the PQ method are given in (23) and (29) .…”

Section: Journal Of Advanced Mechanicalmentioning

confidence: 99%

Modeling and Control of a Dual Stage Actuator Hard Disk Drive

Boettcher

Callafon

Talke

2010

JAMDSM

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A data-based approach is presented for modeling and controller design of a dual-stage servo actuator in a hard disk drive. The servo actuator in this hard disk drive consists of a conventional voice coil motor and a piezo-electrically actuated suspension. A weighted Hankel matrix based realization algorithm that uses frequency domain data is applied to estimate a discrete-time model of the voice coil motor and the piezoelectric actuator. Based on the discrete-time models, different dual-stage track-following controllers were designed using classic and H ∞ loop shaping techniques. The controllers were implemented in real-time in the investigated hard disk drive. A stable feed-back control and good agreement between measurements and simulations show the promising result of data based modeling and control.

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“…They can be combined with a variety of coarse actuators in DSAs. For example, piezos are mounted onto Lorentz actuators (voice coil motor) and applied to hard disk drives (HDDs) [1] or magnetic tape recording systems [2]. Piezos' relatively high force and high stiffness are also used with linear motors in a feed drive system for machining [3].…”

Section: Introductionmentioning

confidence: 99%