Systematic design of displacement-amplifying mechanism for piezoelectric stacked actuators using topology optimization

Gih Keong Lau*, Hejun Du, Mong King Lim

*Corresponding author for this work

Research output: Contribution to journalConference article

4 Scopus citations

Abstract

Displacement-amplifying mechanisms can be systematically designed using topology optimization. Due to the special need of large displacement amplification for piezoelectric stacked actuators, the objective function should be formulated properly. Among output stroke, magnification factor and work ratio, magnification factor better describes the design goal of displacement amplifier and is thus adopted in this work. To depict the dynamic operation of displacement amplifier, undamped harmonic response is used in the formulation. The design problem is thus posed as a material distribution problem, which maximize the dynamic magnification factor by varying the thickness of 2-D domain. Plane stress solid is assumed for the design domain. Stiffness of the actuator and the workpiece is included in the analysis. The design problem is solved by Method of Moving Asymptotes or MMA. To show the viability of this design methodology, two examples of magnification mechanism for printer head driven at different excitation frequency are presented.

Original languageEnglish
Pages (from-to)583-591
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3985
DOIs
StatePublished - 1 Jan 2000
EventSmart Structures and Materials 2000 - Smart Structures and Integrated Systems - Newport Beach, CA, USA
Duration: 6 Mar 20009 Mar 2000

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