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Case Study on Anti-windup Compensation - Micro-actuator Control in a Hard-Disk Drive

  • Guido Herrmann
  • Matthew C. Turner
  • Ian Postlethwaite
Chapter
Part of the Lecture Notes in Control and Information Sciences book series (LNCIS, volume 367)

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 μm for mechanical protection.

In the first part of the chapter, the anti-windup compensation scheme exemplifies an approach suggested by Weston & Postlethwaite [29]. Here, the scheme is posed as a discrete full-order compensator and the closed loop analysis uses a generalized circle criterion 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.

Keywords

Hard Disk Drive Voice Coil Motor High Frequency Resonance Discrete Controller Bilinear Transformation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer London 2007

Authors and Affiliations

  • Guido Herrmann
    • 1
  • Matthew C. Turner
    • 1
  • Ian Postlethwaite
    • 1
  1. 1.University of Leicester, University Road, Leicester, LE1 7RH 

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