Volume : II, Issue : V, May - 2013

Adaptive LS–estimation and Fault Recovery Procedure for PZT–actuated milli–actuator of Hard Disk Drives

Y. Bharadwaja

Abstract :

This paper deals with the servo control methods for Hard Disk Drives by implementing secondary suspension piezoelectric micro actuator which is adaptive LS–estimation and fault recovery procedure for PZT–actuated milli–actuator. In the recent five decades, hard disk drives have been playing an important role in the development of digital technology. The increasing areal density has provided a lot of challenges for the hard disk drive servo control. During the HDD servos, one of the most important parts is servo pattern which is utilized to generate position feedback signals. Thus, the accuracy and precision of servo patterns written by servo track writing process must be emphasized in order to increase the storage density. The concentric self–track writing has been proposed to improve the quality of servo patterns and save the cost of servo track writing. We confirmed that the adaptive estimation method identified the milli–actuator DC–gain precisely and the fault recovery procedure detected the degradation of milli–actuator gain during track–following data reading/ writing operation

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Y.Bharadwaja Adaptive LS-estimation and Fault Recovery Procedure for PZT-actuated milli-actuator of Hard Disk Drives International Journal of Scientific Research, Vol.II, Issue.V May 2013

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