<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Actuators used in hard disk drives (HDD) are produced en mass and therefore their dynamic properties vary within a given tolerance bound. A nominal model representing the batch of actuators is used to design the head positioning servomechanism. Equal performance can not be expected for all actuators when such controller is used. Disk drive servomechanism is expected to provide performance with increasingly tighter tolerance as the demand for higher storage capacity continues. Moreover, physical properties of any actuator may change over time causing the degradation of performance. All these issues demand for good on-line tuning of controller. This paper explores the usage of Iterative Feedback Tuning (IFT) in HDD servomechanism. Improved performance of the tuned controller is demonstrated using simulation and experimental results.</p></abstract>

Actuators used in hard disk drives (HDD) are produced en mass and therefore their dynamic properties vary within a given tolerance bound. A nominal model representing the batch of actuators is used to design the head positioning servomechanism. Equal performance can not be expected for all actuators when such controller is used. Disk drive servomechanism is expected to provide performance with increasingly tighter tolerance as the demand for higher storage capacity continues. Moreover, physical properties of any actuator may change over time causing the degradation of performance. All these issues demand for good on-line tuning of controller. This paper explores the usage of Iterative Feedback Tuning (IFT) in HDD servomechanism. Improved performance of the tuned controller is demonstrated using simulation and experimental results.

Iterative Feedback Tuning (IFT) of Head Positioning Servomechanism in Hard Disk Drive

International Journal on Smart Sensing and Intelligent Systems

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Actuators used in hard disk drives (HDD) are produced en mass and therefore their dynamic properties vary within a given tolerance bound. A nominal model...

Iterative Feedback Tuning (IFT) of Head Positioning Servomechanism in Hard Disk Drive

Published Online: Dec 13, 2017

Page range: 268 - 283

DOI: https://doi.org/10.21307/ijssis-2017-290

Keywords
HDD Servomechanism, Iterative Feedback Tuning, PID controller, Voice Coil Motor

© 2008A. Al Mamun et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Iterative Feedback Tuning (IFT) of Head Positioning Servomechanism in Hard Disk Drive

Published Online: Dec 13, 2017

Page range: 268 - 283

DOI: https://doi.org/10.21307/ijssis-2017-290

KeywordsHDD Servomechanism, Iterative Feedback Tuning, PID controller, Voice Coil Motor

© 2008A. Al Mamun et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
HDD Servomechanism, Iterative Feedback Tuning, PID controller, Voice Coil Motor