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Open AccessArticle

Enhancement of Optical Adaptive Sensing by Using a Dual-Stage Seesaw-Swivel Actuator with a Tunable Vibration Absorber

Department of Mechanical Engineering, National Chiao Tung University, No. 1001, University Road, Hsinchu 30010, Taiwan
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sensors 2011, 11(5), 4808-4829;
Received: 7 April 2011 / Revised: 21 April 2011 / Accepted: 2 May 2011 / Published: 3 May 2011
(This article belongs to the Special Issue Adaptive Sensing)
Technological obstacles to the use of rotary-type swing arm actuators to actuate optical pickup modules in small-form-factor (SFF) disk drives stem from a hinge’s skewed actuation, subsequently inducing off-axis aberrations and deteriorating optical quality. This work describes a dual-stage seesaw-swivel actuator for optical pickup actuation. A triple-layered bimorph bender made of piezoelectric materials (PZTs) is connected to the suspension of the pickup head, while the tunable vibration absorber (TVA) unit is mounted on the seesaw swing arm to offer a balanced force to reduce vibrations in a focusing direction. Both PZT and TVA are designed to satisfy stable focusing operation operational requirements and compensate for the tilt angle or deformation of a disc. Finally, simulation results verify the performance of the dual-stage seesaw-swivel actuator, along with experimental procedures and parametric design optimization confirming the effectiveness of the proposed system. View Full-Text
Keywords: small-form-factor; VCM; PZT; swing arm; absorber small-form-factor; VCM; PZT; swing arm; absorber
MDPI and ACS Style

Chou, P.-C.; Lin, Y.-C.; Cheng, S. Enhancement of Optical Adaptive Sensing by Using a Dual-Stage Seesaw-Swivel Actuator with a Tunable Vibration Absorber. Sensors 2011, 11, 4808-4829.

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