Control Design and Implementation of Hard Disk Drive Servos.
- Resource Type
- Theses
- Authors
- Nie, Jianbin
- Source
- Dissertation Abstracts International; Dissertation Abstract International; 74-02B.
- Subject
- Engineering, Mechanical
- Language
- English
Summary: In addition, the feedback signal in HDD servos is generated from the servo patterns that must be pre-recorded using servo track writing process before the HDD can be used. Thus, the quality of the servo track writing process is also crucial to the accuracy of positioning read/write head. Recently, self-servo track writing has been developed in order to improve the quality of the written servo patterns and reduce the cost of servo track writing process. This dissertation considers two novel controller synthesis methodologies employing a feedforward control structure for performing concentric self-servo track writing in hard disk drives. Simulation results confirm that the two proposed control synthesis methodologies prevent error propagation from the previously written tracks and significantly improve servo track writing performance.