Head-Positioning Control Using Virtual Resonant Modes in a Hard Disk Drive

Takenori ATSUMI
2007 Journal of Advanced Mechanical Design, Systems, and Manufacturing  
In conventional control systems in hard disk drives, it is difficult to compensate for disturbances above the primary mechanical resonance. In this paper, a design method that uses a virtual resonant mode in head-positioning systems of hard disk drives was developed. The virtual resonant mode is a digital filter that works like a mechanical resonant mode. Using the proposed method, stable resonant modes in a control system can be designed with a high degree of accuracy to compensate for
more » ... nces whose frequencies are higher than that of the primary mechanical resonance. Application of this method to a hard disk drive showed that it significantly suppresses disturbances beyond the primary mechanical resonance.
doi:10.1299/jamdsm.1.408 fatcat:4f3wjsl6qbhopm6h5yb54cibbe