Nano Science and Technology Institute
Nanotech 2002 Vol. 1
Nanotech 2002 Vol. 1
Technical Proceedings of the 2002 International Conference on Modeling and Simulation of Microsystems
Chapter 5: MEMS Applications and Characterization

Modeling of a Self-Retracting Fully-Compliant Bistable Micromechanism

Authors:N. Masters and L.L. Howell
Affilation:Georgia Institute of Technology, US
Pages:302 - 305
Keywords:bistable, MEMS, pseudo-rigid-body-model, fully-compliant mechanisms
Abstract:The purpose of this paper is to demonstrate how a combination of models facilitated the development of a new class of small displacement fully-compliant bistable micromechanisms (Self-Retracting Fully-compliant Bistable Micromechanism, or SRFBM). Two different Pseudo-Rigid-Body Models (PRBM) were used in the early stages to determine the basic form of the device. The use of these models allowed bistable configurations to be rapidly identified. Subsequent finite element modeling concentrated on tailoring the devices for specific behaviors. Furthermore, finite elements models were instrumental in predicting the thermal self-retracting behavior of the mechanism. Suitable designs have been fabricated and tested for functionality and endurance. Total travel of the devices is 8.5 mm. Bistability, including on-chip actuation and thermal self-retraction has been demonstrated, as well as fatigue testing in excess of 2 million cycles. On-chip force testing has correlated well with model predictions.
Modeling of a Self-Retracting Fully-Compliant Bistable MicromechanismView PDF of paper
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