This paper presents a new technique for track-following control in hard disk drives, in order to achieve high tracking precision of magnetic read-write heads uniformly for a huge number of disk drives. The basic idea in this technique is to classify the disk drives into several sets depending on dynamics properties, and to apply a robust controller to each set. The problem of designing the optimal classification of dynamics and the corresponding optimal robust controllers is formulated as a nonconvex optimization problem, for which sub-optimal solutions are to be found numerically. A numerical simulation shows the usefulness of the proposed technique by illustrating a tracking performance improvement.
|Number of pages||15|
|Journal||International Journal of Adaptive Control and Signal Processing|
|Publication status||Published - 2008 May|
All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Signal Processing
- Electrical and Electronic Engineering