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公开(公告)号：US06504669B1
公开(公告)日：2003-01-07
申请号：US09329612
申请日：1999-06-10
IPC分类号： G11B5596
CPC分类号： G11B21/24 , G11B5/483 , G11B5/5552
摘要： A disc drive head positioning apparatus includes a head, a suspension which supports the head, a piezoelectric microactuator which is operatively coupled to the suspension, and a charge feedback driver which is operatively coupled to the piezoelectric microactuator. A method of positioning the head relative to a storage medium is also provided.
摘要翻译： 盘驱动头定位装置包括头，支撑头的悬架，可操作地连接到悬架的压电微致动器，以及可操作地耦合到压电微致动器的电荷反馈驱动器。 还提供了一种相对于存储介质定位磁头的方法。
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公开(公告)号：US06600619B1
公开(公告)日：2003-07-29
申请号：US09475362
申请日：1999-12-30
IPC分类号： G11B2102
CPC分类号： G11B5/5552 , G11B5/596
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.
摘要翻译： 公开了一种用于控制盘驱动器中的压电微致动器的振动的系统和方法。 确定压电微致动器上的机械应变并将其反馈到控制器，该控制器基于感测到的应变向压电微致动器提供电信号。 提供给压电微致动器的电信号在微致动器上产生抵消感测应变的机械力。 在一个实施例中，桥接电路耦合到压电微致动器。 桥接电路适于感测压电微致动器两端的电压，并且将压电微致动器两端的电压分离成外部施加到压电微致动器的电压和通过机械应变在压电微致动器上感应的电压。
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