Model of Head-Positioning Error due to Rotational Vibration of Hard Disk Drives

摘要

An analysis method of a head-positioning error due to rotational vibration of magnetic disk drive is proposed. The model takes into account the rotational vibration of the baseplate caused by the reaction force of the head-positioning actuator, the relationship between the rotational vibration and head-track offset, and the sensitivity function of the track-following feedback control. Simula- tion results obtained using the model coincide with experimental data. This model enabled us to predict the data transfer performance.