Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2002.11b
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- Pages.122-127
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- 2002
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- 1598-2548(pISSN)
A Study on the PES Estimation for Developing High-TPI HDD
HIGH-TPI HDD 구현을 위한 PES ESTIMATION에 관한 연구
Abstract
A frequency-domain PES estimation and its prediction method are proposed for the tightly-coupled servo/mechanical design of high-TPI HDD system above 100 kTPI. The major two disturbance energies which are related with mechanical vibrations inside of HDD are used to predict the drive-level PES, while considering closed-loop servo dynamics. One is the torque disturbance which mainly comes from aerodynamic excitation of HSA system and the other is the displacement disturbance from disk-spindle dynamics. In order to obtain the accurate error transfer function of closed-loop servo control, the plant model is measured by accurate experiment. The measured PES is compared with predicted one in terms of frequency-domain PES spectrum and its standard variation value. It is proved that the proposed frequency-domain PES estimation/prediction method is capable of predicting drive-level PES of high-TPI hard disk drive.
Keywords
- Hard disk drive(HDD);
- Position error signal(PES);
- Torque disturbance;
- displacement disturbance;
- Error transfer function