发明名称 |
Vibration control of piezoelectric microactuator |
摘要 |
A system and method for controlling vibration of a piezoelectric microactuator in a disc drive are disclosed. The mechanical strain on the piezoelectric microactuator is ascertained and fed back to a controller which provides an electrical signal to the piezoelectric microactuator based upon the sensed strain. The electrical signal provided to the piezoelectric microactuator produces a mechanical force on the microactuator which counteracts the sensed strain. In one embodiment, a bridge circuit is coupled to the piezoelectric microactuator. The bridge circuit is adapted to sense a voltage across the piezoelectric microactuator and to separate the voltage across the piezoelectric microactuator into a voltage externally applied to the piezoelectric microactuator and a voltage induced on the piezoelectric microactuator by mechanical strain.
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申请公布号 |
US6600619(B1) |
申请公布日期 |
2003.07.29 |
申请号 |
US19990475362 |
申请日期 |
1999.12.30 |
申请人 |
SEAGATE TECHNOLOGY LLC |
发明人 |
MORRIS JOHN C.;MOLLOY BRIAN G.;SLUZEWSKI DAVID A.;WRIGHT JOHN S. |
分类号 |
G11B5/55;G11B5/596;G11B21/10;G11B21/21;H01L41/09;H02N2/00;(IPC1-7):G11B21/02 |
主分类号 |
G11B5/55 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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