Case study on anti-windup compensation - Micro-actuator control in a hard-disk drive

G Herrmann, MC Turner, I Postlethwaite

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

1 Citation (Scopus)

Abstract

This chapter demonstrates the use of anti-windup compensation in the control loop of a micro-actuator which is nominally controlled by a linear, discrete robust controller. The micro-actuator is part of a hard disk drive dual-stage servo-control system for positioning of the read/write head. The actuator inputs are constrained to retain the micro-actuator's displacement range of less than 0.4 mu m for mechanical protection. In the first part of the chapter, the anti-windup compensation scheme exemplifies an approach suggested by Weston & Postlethwaite. Here, the scheme is posed as a discrete full-order compensator and the closed loop analysis uses a generalized circle citerion approach. The design of the compensator is posed in LMI-form. In the second part of the chapter, it is shown how the linear micro-actuator control loop with anti-windup compensation is incorporated into the non-linear servo-control scheme for positioning of the read/write head in a hard disk drive.
Translated title of the contributionCase study on anti-windup compensation - Micro-actuator control in a hard-disk drive
Original languageEnglish
Title of host publicationMathematical Methods for Robust and Nonlinear Control
EditorsM. C. Turner, D. G. Bates
PublisherSpringer London
Pages413 - 430
Number of pages18
ISBN (Print)9781848000247
Publication statusPublished - 2007

Publication series

NameLecture Notes in Control and Information Sciences
Volume367

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