Nonlinear Mid-frequency Disturbance Compensation in Hard Disk Drives

@inproceedings{Li2005NonlinearMD,
  title={Nonlinear Mid-frequency Disturbance Compensation in Hard Disk Drives},
  author={Ying Li and Guoxiao Guo},
  year={2005}
}
In single-stage hard disk drives (HDDs), it is difficult to suppress midfrequency narrow band disturbances caused by disk flutter or windage effectively. This article presents a nonlinear compensation scheme to deal with narrow band disturbance around 1 kHz. The nonlinear compensator that provides additional phase lead without degrading the magnitude characteristic is proposed. This scheme is used to compensate for phase loss due to narrow band filter and enhance the mid-frequency disturbance… CONTINUE READING