Please use this identifier to cite or link to this item: https://doi.org/10.1109/ICCIAutom.2011.6356667
Title: Design of track following controller of dual actuated HDD servo for 10 Tb/in2 magnetic recording
Authors: Keikha, E.
Chamanbaz, M.
Al-Mamun, A.
Bhatia, C.S. 
Issue Date: 2012
Source: Keikha, E.,Chamanbaz, M.,Al-Mamun, A.,Bhatia, C.S. (2012). Design of track following controller of dual actuated HDD servo for 10 Tb/in2 magnetic recording. Proceedings - 2011 2nd International Conference on Control, Instrumentation and Automation, ICCIA 2011 : 264-269. ScholarBank@NUS Repository. https://doi.org/10.1109/ICCIAutom.2011.6356667
Abstract: One of the obstacles to achieving high recording density in hard disk drives (HDDs) is servo performance limitation. As HDD is a mass produced commodity, the challenge is not only achieving high performance for nominal models but with all the uncertainties and variations in HDD models for thousands of HDDs in a batch of production line. This paper presents the implementation results of a novel technique based on the H∞ probabilistic robust approach for the track-following controller of HDD servo systems. The objective is to design and implement an H∞ dynamic output feedback controller that achieves robust stability in the presence of various parametric uncertainties. We consider uncertainty as a random variable with uniform probability distribution. Then a randomized algorithm based on gradient iteration is preformed to compute design parameters. The proposed controller is implemented in real-time on a commercially available drive and the results are compared with the conventional H∞ approach. The results reveal that with a very small risk of violation of the cost function, the proposed method can achieve much better performance compared to the conventional robust methods. © 2011 IEEE.
Source Title: Proceedings - 2011 2nd International Conference on Control, Instrumentation and Automation, ICCIA 2011
URI: http://scholarbank.nus.edu.sg/handle/10635/83620
DOI: 10.1109/ICCIAutom.2011.6356667
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