Please use this identifier to cite or link to this item:
Title: Robust periodic disturbance compensation via multirate control
Keywords: Adaptive feedforward, disturbance rejection, multirate sampling, runout compansation, servo control
Issue Date: 21-Jul-2005
Citation: DUAN CHANG (2005-07-21). Robust periodic disturbance compensation via multirate control. ScholarBank@NUS Repository.
Abstract: In this thesis, an adaptive feedforward cancellation (AFC) scheme based on multirate discretization is proposed for compensation of periodic disturbance in hard disk drive (HDD) digital servo systems. By discretizing the plant via multirate scheme, we obtain the inverse of the closed-loop transfer function no matter whether the closed-loop system is a minimum phase one or not. The proposed scheme cancels selected repeatable runout (RRO)components rapidly without amplifying unselected higher frequency harmonics. Simulation and experiment results show that the scheme can attenuate selected RRO harmonics efectively, even at around the open-loop crossover frequency range which cannot be achieved by the usual AFC scheme. The proposed scheme is also robust against plant parameter variations.
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Duan Chang_MEng_ECE_Robust Periodic Disturbance Compensation via Multirate Control_2005.pdf1.29 MBAdobe PDF



Page view(s)

checked on Apr 20, 2019


checked on Apr 20, 2019

Google ScholarTM


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