Head Positioning Control of a Hard Disk Drive Using H^|^infin; Control Theory
نویسندگان
چکیده
منابع مشابه
Micro-actuator control in a hard-disk drive
This chapter demonstrates the use of anti-windup compensation in the control loop of a micro-actuator which is nominally controlled by a linear, discrete robust controller. The micro-actuator is part of a hard disk drive dual-stage servo-control system for positioning of the read/write head. The actuator inputs are constrained to retain the micro-actuator’s displacement range of less than 0.4 μ...
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In this paper, we study the unobserved vibrations of the head in hard disk drives which may lead to destruction of user data. We show that the acceleration input excites the mechanical resonance near the sampling frequency of the hold in the settling characteristics after the track-seeking control. We also show that the degree to which these oscillations are unobservable depends on the sampling...
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Actuators used in hard disk drives (HDD) are produced en mass and therefore their dynamic properties vary within a given tolerance bound. A nominal model representing the batch of actuators is used to design the head positioning servomechanism. Equal performance can not be expected for all actuators when such controller is used. Disk drive servomechanism is expected to provide performance with ...
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In this paper, and mixed / controllers are designed for a hard disk drive (HDD) using linear matrix inequalities (LMIs). In the proposed algorithm, the problem of minimizing track misregistration (TMR) in the presence of unmodeled dynamics of voice-coil motor (VCM) is formulated as robust and mixed / problems. Additional stack variables are introduced to characterize and performances. The simul...
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This paper presents a self-tuning scheme based on response surface method (RSM) to find the optimal finite impulse response (FIR) Youla parameter for an observer based state feedback track-following controller that minimizes the 3 times standard deviation of the PES in an HDD servo system. All the tested Youla parameters to construct the response surface were selected within a robust stable reg...
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ژورنال
عنوان ژورنال: Transactions of the Society of Instrument and Control Engineers
سال: 1993
ISSN: 0453-4654
DOI: 10.9746/sicetr1965.29.71