Multirate digital control for high track density magnetic disk drives

A computationally effective fixed-order multirate digital control scheme is presented for disk drive actuator control. The proposed multirate controller outputs control commands at each control update instant, while the multirate control scheme is evenly computed for every measurement sampling perio...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-03, Vol.39 (2), p.832-837
Main Authors: Lee, Seung-Hi, Chung, Chung Choo, Suh, Sang-Min
Format: Article
Language:English
Subjects:
Actuators
Applied sciences
Computation
Control design
Control systems
Density
Digital
Digital control
Disk drives
Dynamics
Electronics
Exact sciences and technology
Magnetic and optical mass memories
Magnetic resonance
Magnetism
Open loop systems
Other magnetic recording and storage devices (including tapes, disks, and drums)
Processors
Sampling
Sampling methods
Signal sampling
Storage and reproduction of information
Telecommunication computing
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Description
Summary:A computationally effective fixed-order multirate digital control scheme is presented for disk drive actuator control. The proposed multirate controller outputs control commands at each control update instant, while the multirate control scheme is evenly computed for every measurement sampling period, thereby eliminating the need for very powerful processors for implementation. Application results demonstrate that the proposed multirate control scheme is useful to smooth control inputs so as not to excite the flexible mode dynamics of the actuator arm and suspensions.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.808935