NDLI: A Self Servo Writing Scheme for a MEMS Storage Device with Sub-nanometer Precision

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A Self Servo Writing Scheme for a MEMS Storage Device with Sub-nanometer Precision

Content Provider	Semantic Scholar
Author	Sebastian, Abu
Copyright Year	2008
Abstract	In the probe-based storage concept being pursued by IBM, a MEMS based micro-scanner is used to position the storage medium relative to the read/write probes. To achieve repeatable positioning over a large storage area, it is necessary to have medium-derived position information. Dedicated servo-fields are typically employed to obtain medium-derived position information. Sub-nanometer positioning resolutions are desirable while writing these servo-fields. Such precise positioning at acceptable bandwidth using a global position sensor requires the directed design of the closed-loop noise sensitivity transfer function so as to minimize the impact of sensing noise. This paper describes one such control architecture based on resonant controllers where the impact of measurement noise on positioning is minimal while providing sufficient damping and hence satisfactory tracking performance. It is estimated that the positioning error due to sensing noise is a remarkably low 0.25 nm. Experimental results are also presented that show error-free operation of the device at high densities.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://folk.ntnu.no/skoge/prost/proceedings/ifac2008/data/papers/2920.pdf
Language	English
Access Restriction	Open
Subject Keyword	Actuator Device Component Apache Axis Controllers Genus Axis Glycogen Storage Disease Type I Goto IBM Research Inclusion Body Myositis (disorder) Medication Event Monitoring System Microelectromechanical systems Nanometer Noise-induced hearing loss Precise Point Positioning Scanner Device Component Servo Device Component Storage Medium Storage Unit Transfer function density sensor (device)
Content Type	Text
Resource Type	Article

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