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|Title:||H∞ disturbance observer design for high precision track following in hard disk drives||Authors:||Thum, C.K.
|Issue Date:||2009||Citation:||Thum, C.K., Du, C., Lewis, F.L., Chen, B.M., Ong, E.H. (2009). H∞ disturbance observer design for high precision track following in hard disk drives. IET Control Theory and Applications 3 (12) : 1591-1598. ScholarBank@NUS Repository. https://doi.org/10.1049/iet-cta.2008.0317||Abstract:||Contrary to the conventional method of disturbance observers (DOB) where Q-filter is designed to be a low-pass filter with unity DC gain, the optimal H∞ method has been proposed to design the Q-filter and applied in the servo control system of hard disk drives in track following. Simulation and implementation results have shown that the resultant H∞ DOB improves low-frequency disturbance attenuation without compromising the disturbances attenuation performance at higher frequency region achieved by the nominal feedback controller. In terms of track-following precision, the proposed method is approximately 5 more accurate than the conventional method. © The Institution of Engineering and Technology 2009.||Source Title:||IET Control Theory and Applications||URI:||http://scholarbank.nus.edu.sg/handle/10635/82440||ISSN:||17518644||DOI:||10.1049/iet-cta.2008.0317|
|Appears in Collections:||Staff Publications|
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