Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/18873
Title: Comprehensive modeling and robust nonlinear control of HDD servo systems
Authors: CHENG GUOYANG
Keywords: Hard disk drives, Servo systems, Modeling, Robust control, Nonlinear control, Toolkit
Issue Date: 23-Jan-2006
Source: CHENG GUOYANG (2006-01-23). Comprehensive modeling and robust nonlinear control of HDD servo systems. ScholarBank@NUS Repository.
Abstract: This thesis is dedicated to the methodology of servo system design for new generation hard disk drives (HDDs) characterized by smaller form factor and higher track density. We begin with a comprehensive modeling of the voice coil motor (VCM) in a microdrive, with a careful investigation of its inherent nonlinearities. A track following controller is then designed using the Robust and Perfect Tracking (RPT) control technology with integral enhancement and nonlinearity pre-compensation. Furthermore, we develop an enhanced Composite Nonlinear Feedback (CNF) control technique with a MATLAB toolkit to facilitate its design process, and successfully apply it to design a microdrive servo system which is capable of performing track following and short span track seeking in one shot, with fast and smooth settling and yet without steady state error. The enhanced CNF and RPT are further utilized in the design of a dual-stage servo system with an additional piezoelectric microactuator to provide faster and finer positioning. Both simulation and experimental results verify that our designs are effective. Our methodology and toolkit provide an integrated solution for HDD servo system design and can be readily applied to other servo problems as well.
URI: http://scholarbank.nus.edu.sg/handle/10635/18873
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
ChengGY.pdf2.61 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

238
checked on Dec 11, 2017

Download(s)

208
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.