I n positionin.g system of a HDD, many resonance modes exist, and they are very much close each other. Therefore, it is dificult to obtain the precise model when the curve fitting method was used and it is dificult to suppress both the effect of these resonance and that of any disturbances. I n this paper, a differential iteration method that was one of an experimental modal analysis technique in frequency domain is applied to obtain the precise model of a positioning system of a HDD. Three controllers 1 ) a controller which designed robust controller design method, 2) a Lead-Lagfilter that add on the inverse model that was calculated using pwcise model of the positioning system of a HDD, and 3) a Lead-Lag filter that add on the notch filter to suppress the effect of resonance in high frequency range were used to compare the control performance. W e compare between tlie results with each con,troller in numerical simulation.
SUMMARYThe paper proposes a high-precision simulator for the following mode system design in hard disk drives (HDDs). The simulator is composed of two models: one is a precise mechanical plant which includes numerous high-frequency vibration modes, and the other is a disturbance signal model which is separated into various disturbances. In the proposed approach, a differential iteration method is applied to identify the precise mechanical plant, providing accurate experimental model analyses. The effectiveness of the syn-
The paper proposes a high precision simulator for the following mode system design in Hard Disk Drives (HDDs). The simulator is composed of two models: one is a precise mechanical plant which includes numerous high frequency vibration modes, and the other is a disturbance signal model which is separated into various disturbances. In the proposed approach, a differential iteration method is applied to identify the precise mechanical plant, providing accurate experimental model analyses. The effectiveness of the synthesized simulator was verified by the comparative studies for experiments and numerical simulations.
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