Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/55562
Title: Design of a fast and precise head positioning servo control system for HDDS
Authors: Cheng, G.-Y. 
Jin, W.-G.
Keywords: Disturbance compensation
Hard disk drive
Nonlinear control
Servo system
Tracking control
Issue Date: 16-Jun-2006
Source: Cheng, G.-Y.,Jin, W.-G. (2006-06-16). Design of a fast and precise head positioning servo control system for HDDS. Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 26 (12) : 139-143. ScholarBank@NUS Repository.
Abstract: A new parameterized controller is designed for a hard disk drive (HDD) head positioning servo system which currently uses the voice coil motor as its servo mechanism. The controller aims to meet the tougher performance specification in HDD head positioning. Simulation and experiment studies have been carried out. In the design of the controller, a so-called composite nonlinear feedback (CNF) control technology is adopted, which can improve the transient performance, and achieve fast response and low overshoot at the same time. A reduced-order observer is also designed to estimate and then compensate the unknown disturbance in the servo system. This effectively removes the static tracking error that would be caused by disturbances without compensation. Simulation and experimental results verify that the HDD head is capable of fast and precise positioning on target tracks. The parameterized design of the servo controller can be easily generalized to other servo systems.
Source Title: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/55562
ISSN: 02588013
Appears in Collections:Staff Publications

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