Head suspension with resonance feedback transducer

Details Head suspension with resonance feedback transducer Head suspension with resonance feedback transducer

2006-06-09

2009-11-17

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Head mounting

Disk record

C360S077030, C360S078050, C360S075000

Reissue Patent

active

RE040975

ABSTRACT:
A head suspension assembly including a load beam having a rigid region, a mounting region on a proximal end of the load beam, and a flexure on a distal end of the load beam. The flexure has a read/write head attachment region for supporting a read/write head on the distal end of the load beam. Deformation of the head suspension assembly displaces the head attachment region. A strain transducer circuit that acts as a strain gauge is mounted on the head suspension assembly. The resistance of the transducer circuit varies with strain in the circuit, which, in turn, varies with displacement of the read/write head. The magnitude of resistance change of the transducer circuit indicates the magnitude of head off-neutral motion.

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patent: 5335126 (1994-08-01), Tokyuama et al.
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patent: 5471734 (1995-12-01), Hatch et al.
patent: 5526208 (1996-06-01), Hatch et al.
patent: 5657188 (1997-08-01), Jurgenson et al.
patent: 04271072 (1992-09-01), None
Yamaguchi, Y., et al.; Flow Induced Vibration of Magnetic Head Suspension in Hard Disk Drive; IEEE Transactions on Magnetics; Sep. 1986; 1022-1024; MAG-22, #5; IEEE USA.
D'Amico, “Disk Drives Go Micro”, Berkley Engineering Forefront 1996, 3 pgs.
Lee et al., “Piezoelectric model sensor/actuator pairs for critical active damping vibrational control”, J. Acoust. Soc. Am., vol. 90, No. 1, Jul. 1991, pp. 374-384.

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