Piezoelectric stack-based microactuator for hard disk drives
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abstract
A uniquely configured and easily manufacturable piezoelectric microactuator for hard disk drives is presented. The microactuator utilizes two piezoelectric stacks placed at the suspension-E block interface, resulting in a displacement of 1.0 m at the suspension tip. Each piezoelectric stack is made up of 20 layers. For the dynamic behavior of the suspension to be illustrated, static displacements were measured. In addition, a dynamic model for the microactuator was constructed by using least-squares curve fitting of a measured frequency response curve.