Fast positioning of disk drives and other physical systems

Details Fast positioning of disk drives and other physical systems Fast positioning of disk drives and other physical systems

2006-04-25

2006-04-25

Sniezek, Andrew L. (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C318S560000, C360S077020, C360S078060

Reexamination Certificate

active

07035042

ABSTRACT:
A method useful to change a system's output from one value to another within a prescribed time-interval in an optimal manner using optimization criteria such as minimal time (e.g., to increase throughput) or minimal energy (e.g., to reduce heat dissipation and reduce induced vibrations). Optimal design of maneuvers (such as fast seek and scanning) that rapidly change the output from one value to another, arise in flexible structure applications, including rapidly positioning the end-point of large-scale space manipulators, positioning of read/write heads of disk-drive servo systems, which are relatively medium-scale flexible structures, and nano-scale positioning and manipulation using relatively small-scale piezo actuators. Maintaining a position of an element constant outside of the transition time-interval is critical in many applications. For example, in disk-drive applications, read and write operations cannot be performed (before and after the output transition) if the output position is not precisely maintained at a desired track.

REFERENCES:
patent: 2003/0035241 (2003-02-01), Gregg
patent: 2003/0189784 (2003-10-01), Galloway
Dorf, R.C. and Bishop, R. H. Picture From Modern Control Systems. Chapter 1, Introduction to Control Systems. Undated P. 24. Prentice Hall 1 pg.

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