Details

Autor(en) / Beteiligte

• Fu-Ying Huang
• Semba, T.
• Imaino, W.
• Lee, F.

Titel

Active damping in HDD actuator

Ist Teil von

• 2000 Asia-Pacific Magnetic Recording Conference. Digests of APMRC2000 on Mechanical and Manufacturing Aspects of HDD (Cat. No.00EX395), 2000, p.MB6/1-MB6/2

Ort / Verlag

IEEE

Erscheinungsjahr

2000

Quelle

IEEE Xplore

Beschreibungen/Notizen

• A non-traditional mechanical modification technique to take care of the major servo bandwidth limited resonance mode (butterfly mode) is developed, analyzed, and validated. With an additional sensor on the actuator and an external feedback loop, the butterfly mode can be damped and stiffened such that the gain of the head mechanical transfer function is close to 1/s/sup 2/. Servo improvement is also studied comparing to notch filter approach. It shows that the butterfly mode notch filter can be removed, and the phase margin can be improved by 7 degrees.