Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMAG.2006.890242
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dc.titleNonrepeatable run-out rejection using online iterative control for high-density data storage
dc.contributor.authorPang, C.K.
dc.contributor.authorWong, W.E.
dc.contributor.authorGuo, G.
dc.contributor.authorChen, B.M.
dc.contributor.authorLee, T.H.
dc.date.accessioned2014-10-07T04:33:21Z
dc.date.available2014-10-07T04:33:21Z
dc.date.issued2007-05
dc.identifier.citationPang, C.K., Wong, W.E., Guo, G., Chen, B.M., Lee, T.H. (2007-05). Nonrepeatable run-out rejection using online iterative control for high-density data storage. IEEE Transactions on Magnetics 43 (5) : 2029-2036. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2006.890242
dc.identifier.issn00189464
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/82776
dc.description.abstractThe spectra of disturbances and noises affecting precise servo positioning for ultrahigh-density storage in future hard disk drives are time-varying and remain unknown. In this paper, we propose an online iterative control algorithm that sets the measured position error signal (PES) into the servo system to achieve high track densities by minimizing the square of the H2-norm of the transfer function from nonrepeatable run-out (NRRO) disturbances to the true PES. It is not necessary to solve any algebraic Riccati equations and linear matrix inequalities. The algorithm constructs an online repeatable run-out estimator to extract NRRO components for gradient estimates, thereby preventing the controller parameters from being trapped in a local minima. Experimental results on a PC-based servo system for a spinstand show an improvement of 22% in 3σ NRRO and suppression of baseline NRRO spectrum. © 2007 IEEE.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1109/TMAG.2006.890242
dc.sourceScopus
dc.subjectHard disk drives
dc.subjectIterative control
dc.subjectNRRO
dc.subjectPES
dc.subjectSelf servotrack writing (SSW)
dc.subjectServo track writing (STW)
dc.typeArticle
dc.contributor.departmentDEPT OF ELECTRICAL & COMPUTER ENGG
dc.description.doi10.1109/TMAG.2006.890242
dc.description.sourcetitleIEEE Transactions on Magnetics
dc.description.volume43
dc.description.issue5
dc.description.page2029-2036
dc.description.codenIEMGA
dc.identifier.isiut000246123700022
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