Paper Info
Title
Phase lead peak filter method to high TPI servo track writer with microactuators
Abstract
A servo track writing (STW) platform with dual piezoelectric (PZT) microactuator is proposed for higher track density hard disk drives (HDDs). We mainly deal with the servo control issues to achieve high track density. Vibration and noise analysis based on the measured position error signal (PES) indicates that the PES is significantly disturbed by narrow-band vibrations. Hence, we propose a general second-order phase lead peak filter (PLPF) that is applicable to reject narrow-band disturbances at all frequency ranges. The filter zero is designed to minimally degrade the closed-loop system stability and obtain a smooth sensitivity curve around the disturbance frequency. A feedback controller is employed to stabilize the servo loop and then a PLPF is embedded to further suppress the specific vibrations. The readback position errors are evaluated and 6.4 nm 3sigma value of the true PES NRRO is achieved, corresponding to 395k track-per-inch (TPI) track density
Year
DOI
Venue
2006
10.1109/ACC.2006.1656398
Minneapolis, MN
Keywords
DocType
Volume
closed loop systems,disc drives,feedback,hard discs,microactuators,piezoelectric actuators,stability,vibration control,closed-loop system stability,feedback controller,filter zero design,hard disk drives,narrow-band disturbances,noise analysis,phase lead peak filter method,piezoelectric microactuator,position error signal,sensitivity curve,servo control,servo loop stabilization,servo track writer,vibration analysis,vibration suppression,signal analysis,frequency,writing,second order,actuators
Conference
1-12
ISSN
ISBN
Citations 
0743-1619
1-4244-0210-7
9
PageRank 
References 
Authors
1.33
2
7
Name
Order
Citations
PageRank
Jinchuan Zheng122126.92
Chunling Du216025.03
Guoxiao Guo313124.11
Youyi Wang452869.02
J. Zhang55210.98
qing li6192.90
B. Hredzak76815.30