Topology optimization of compliant mechanical amplifiers for piezoelectric actuators

A method for the design of displacement amplifying compliant mechanisms for piezoelectric actuators is developed using a topology optimization approach. The overall stroke amplification or geometric advantage of the mechanism, and the overall mechanical efficiency of the mechanism are considered as...

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Bibliographic Details
Published in:Structural and multidisciplinary optimization 2000-12, Vol.20 (4), p.269-279
Main Authors: CANFIELD, S, FRECKER, M
Format: Article
Language:English
Subjects:
Acoustic wave devices, piezoelectric and piezoresistive devices
Applied sciences
Dielectric, ferroelectric, and piezoelectric devices
Electronics
Exact sciences and technology
Formulations
Linear programming
Mechanical efficiency
Methods
Optimality criteria
Piezoelectric actuators
Piezoelectricity
Production scheduling
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Topology optimization
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Summary:A method for the design of displacement amplifying compliant mechanisms for piezoelectric actuators is developed using a topology optimization approach. The overall stroke amplification or geometric advantage of the mechanism, and the overall mechanical efficiency of the mechanism are considered as objective functions. The maximization of these objective functions is accomplished using two different solution methods, Sequential Linear Programming and an Optimality Criteria method. The focus of this paper is on the underlying topology optimization problem formulations and the solution methods. Design examples are presented which illustrate the method, with comparisons of the computation time and mechanism performance for the two formulations and solution methods. A procedure has also been developed to automatically convert the topology optimization results to a solid CAD model. A prototype design has been fabricated to serve as proof of concept.
ISSN:1615-147X
1615-1488
DOI:10.1007/s001580050157