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
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 contribution||Case study on anti-windup compensation - Micro-actuator control in a hard-disk drive|
|Title of host publication||Mathematical Methods for Robust and Nonlinear Control|
|Editors||M. C. Turner, D. G. Bates|
|Pages||413 - 430|
|Number of pages||18|
|Publication status||Published - 2007|
|Name||Lecture Notes in Control and Information Sciences|