Storage medium and method for actuator movement control

Details Storage medium and method for actuator movement control Storage medium and method for actuator movement control

2006-04-18

2006-04-18

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07031093

ABSTRACT:
A storage device employing the ramp load/unload technique for an actuator is disclosed that has high shock-resistance, high vibration-resistance, and is capable of rapid and stable ramp load/unload operations. A position detection unit integrates the speed of the actuator, obtained by detecting a back electromotive force generated in a VCM, to calculate the present position of the magnetic head. A position determination unit compares the present position of the magnetic head with a series of position thresholds, and based on the comparison results, a bandwidth switching unit switches the bandwidth of a PI controller for feedback control of the actuator, from a narrow bandwidth to a wide bandwidth and vice versa. At positions where the speed starts to change or the speed change becomes small, the position determination is performed and the bandwidth is appropriately switched.

REFERENCES:
patent: 4956831 (1990-09-01), Sarraf et al.
patent: 2001/0036031 (2001-11-01), Hirano et al.
patent: 9-320222 (1997-12-01), None
patent: 2001-052458 (2001-02-01), None
patent: 2001-155455 (2001-06-01), None
patent: 2003-085902 (2003-03-01), None
patent: 2003-141839 (2003-05-01), None
patent: 2003-196939 (2003-07-01), None

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