Abstract
In this paper, the design of Hard Disk Drive (HDD) servo systems based on state-space techniques is considered. In particular, we analyze the performances of discrete-time controllers obtained by means of LQG optimal control theory. The key control design issue we address is related to the need of achieving sufficiently high close-loop bandwidth while granting adequate disturbance rejection in the loop gain crossover frequency region. It turns out that the shaping of the sensitivity function is a critical issue, in particular when Run Outs compensation schemes are introduced (e.g., repetitive control schemes). The effectiveness of discrete-time loop transfer recovery techuiques (LTR) in achieving a satisfactory loop shaping design starting from an LQG regulator is discussed. The proposed control algorithms are then evaluated on a test platform based on a commercial HDD. The experimental results thus obtained are reported and discussed.
| Original language | English |
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| Title of host publication | IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM |
| Pages | 828-832 |
| Number of pages | 5 |
| Volume | 2 |
| Publication status | Published - 2001 |
| Event | 2001 IEEE/ASME International Conference on Advanced Intelligent Mechatronics Proceedings - Como, Italy Duration: Jul 8 2001 → Jul 12 2001 |
Other
| Other | 2001 IEEE/ASME International Conference on Advanced Intelligent Mechatronics Proceedings |
|---|---|
| Country/Territory | Italy |
| City | Como |
| Period | 7/8/01 → 7/12/01 |
Keywords
- Hard disk drives
- Loop transfer recovery
- LQG controller design
- Single stage actuators
ASJC Scopus subject areas
- Engineering(all)