NDLI: A Nonlinear Control Scheme Applied to Track-Seeking in Hard Disk Drive Dual Stage Servo System

Content Provider	IEEE Xplore Digital Library
Author	Ying Li Venkataramanan, V. Youyi Wang Guoxiao Guo
Copyright Year	2003
Description	Author affiliation: School of Electric & Electronic Engineering, Nanyang Technologica University, Nanyang Avenue, Singapore 639798. Email: pg01767769, evvenkataremanan, eyywang@ntu.edu.sg (Ying Li)
Abstract	A nonlinear control scheme applied to track-seeking in hard disk dual stage servo system is presented. A reference input-shaping generator is designed to produce a smooth approximation of step signal so as to reduce the variation of tracking error. As the plant is a DISO (dual-input single-output) system, two seperate reference signals are used for the VCM controller and the MA controller. The VCM controller is designed as a nonlinear one to compensate for the usual tradeoff between reponse speed and overshoot in the step response of linear system and the MA control loop is a simple bandpass filter to attenuate the effect of the MA high frequency resonance and compensate for the small tracking error caused by the VCM loop. A switch is used in the MA loop to make it work only when error is in the range of ±1μm due to MA stroke limitation. Simulation is given in the end.
Sponsorship	Lee Found. IEEE Montreal Sect. Candian Soc. Mechanical Eng
Starting Page	962
Ending Page	965
File Size	279671
Page Count	4
File Format	PDF
ISBN	078037777X
DOI	10.1109/ICCA.2003.1595165
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-12
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nonlinear control systems Control systems Hard disks Servomechanisms Switches Signal generators Signal design Linear systems Band pass filters Resonant frequency
Content Type	Text
Resource Type	Article

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