This paper deals with a 2D (x-y) actuator using multimode degeneration of bending vibrations - B₂₁,B₂₁' modes - and a radial vibration - (R,1) mode-excited in a piezoelectric ring vibrator. This actuator is aimed for not so large movement such as the one of a camera lens. The operating principle and the driving methods for movements of the actuator are presented. Degeneration conditions of the modes are considered by applying F.E.M., and the construction and characteristics of a prototype actuator are shown. It was found that the 2D (x- y) actuator can be made possible using the multimode ring vibrator proposed here.

Date Published: 26 April 1996
PDF: 6 pages
Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); doi: 10.1117/12.237027

Published in SPIE Proceedings Vol. 2779:
3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials
Pierre Francois Gobin; Jacques Tatibouet, Editor(s)