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http://dx.doi.org/10.5302/J.ICROS.2013.13.1876

Improvement of the Transient Response by Partially Compensating Initial Values of Digital Controllers  

Doh, Tae-Yong (Hanbat National University)
Ryoo, Jung Rae (Seoul National University of Science and Technology)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.19, no.4, 2013 , pp. 285-289 More about this Journal
Abstract
In switching from the track-seeking or track-jumping control mode to track-following control mode in hard disk drives or optical disk drives, initial values of the feedback controller are tuned to improve the transient response. In general, all the initial values of the controller have been compensated for this purpose. In this paper, by partially compensating initial values of digital controllers, we achieve a good performance of the transient response. In the proposed method for IVC (Intial Value Compensation), LMIs (Linear Matrix Inequalities) are used, which includes conditions for improving the performance of the transient response such as reducing a tracking error and control efforts. We obtain optimal initial values of the controller by solving an optimization problem with constraints represented by only one LMI. Although initial values of the controller are partially compensated, we can show that not only a sufficient performance of the transient response is obtained but also control efforts are diminished. The feasibility of the method is verified by simulation studies.
Keywords
digital control; MSC (Mode Switching Control); IVC (Initial Value Compensation); lead-lag controller; LMI (Linear Matrix Inequality); transient response;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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