Three-stage Control for High Servo Bandwidth and Small Skew Actuation

Three-stage Control for High Servo Bandwidth and Small Skew Actuation
Title:
Three-stage Control for High Servo Bandwidth and Small Skew Actuation
Other Titles:
IEEE transactions on magnetics
Keywords:
Publication Date:
14 July 2014
Citation:
Chunling Du; Cheng Peng Tan; Jiaping Yang, "Three-Stage Control for High Servo Bandwidth and Small Skew Actuation," in Magnetics, IEEE Transactions on , vol.51, no.1, pp.1-7, Jan. 2015 doi: 10.1109/TMAG.2014.2339192
Abstract:
A three-stage actuation control system is proposed to enable high servo bandwidth track-following and possibly for small skew angle actuation system of hard disk drives. It involves a VCM actuator as a primary actuator, a PZT actuated milliactuator as a secondary actuator. Both of them have the 1st dominant resonance mode at 5kHz, and the milliactuator has 200nm stroke. A thermal microactuator having 50nm stroke is used as a third actuator for a high servo bandwidth. A control strategy with controller design method is proposed to meet the performance requirement of each actuator’s control loop and the overall control system. More than 6kHz servo bandwidth is achieved and 430nm external vibration can be covered by the three-stage actuation system. Simulation and experiment results demonstrate the control performance of the three-stage closed-loop system.
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PublisherCopyrights
Funding Info:
Description:
(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
ISSN:
0018-9464
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