System Configuration and Evaluation for Optical Sled Drive Using Constraint-tuning Ultrasonic Actuator

摘要

Through the estimated method for constraint-tuning modified-mode (CTMM), an innovative thin-disc piezoelectric ultrasonic actuator is used to drive an optical sled in this study. With four screws positioned on the thin-disc actuator at the angle distribution of 0°, 90°, 180°, and 320°, both modified modes of (1, 2)_C and (1, 1)_S in vibration provide an approximate equilibrium force to push an optical sled in bilateral movement. The innovative ultrasonic actuator has the vibrator's compact and thinner structure, a thickness of 3 millimeters, without a gearbox rather than a conventional DC sled motor. Using contact friction to drive an optical sled with quick tracking in bilateral motion, experimental results demonstrate obtaining the desired function by a proposed single-phase, bi-frequency LC resonant driving circuit as well as remaining the original sled controller. The general specification of linear speed achieves 200-300 mm/s at less power dissipation for pushing the CD652A BenQ sled drive with 1.0 N output force and 20%-33% efficiency.