Adaptive digital demodulation of sinusoidal encoder signal for positioning control of spiral servo track writing

Title
Adaptive digital demodulation of sinusoidal encoder signal for positioning control of spiral servo track writing
Author
정정주
Keywords
Digital Signal Processor; Optical Encoder; Transient Region; Digital Logic; Position Error Signal
Issue Date
2012-03
Publisher
SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Citation
MICROSYSTEM TECHNOLOGIES Vol.18 No.9-10 [2012] 1247-1253
Abstract
An adaptive digital demodulation method for a sinusoidal encoder signal is proposed for fast and accurate analysis of spiral servo track writing (SSTW). The proposed methods combine adaptive signal correction and digital interpolation. In addition, digital phase-shifted sinusoid (PSS) interpolation is proposed in order to acquire precise position information. The adaptive signal correction method compensates for a fast-motion non-ideal encoder signal. The digital PSS can be simply implemented and can resolve the switching noise of conventional analog methods. The proposed adaptive digital demodulation scheme can be simply digitalized and can improve the position control in SSTW. From the simulation and experimental results, we have validated the proposed methods, which show noticeable improvement in terms of the Lissajous error and the position error signal.
URI
https://link.springer.com/article/10.1007%2Fs00542-012-1488-y
ISSN
0946-7076; 1432-1858
DOI
10.1007/s00542-012-1488-y
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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