Frequency doubling in elastic mechanisms using buckling of microflexures

Journal Article (2019)
Authors

Davood Farhadi Machekposhti (TU Delft - Mechatronic Systems Design)

JL Herder (TU Delft - Mechatronic Systems Design, TU Delft - Precision and Microsystems Engineering)

Nima Tolou (TU Delft - Mechatronic Systems Design)

Research Group
Mechatronic Systems Design
Copyright
© 2019 D. Farhadi Machekposhti, J.L. Herder, N. Tolou
To reference this document use:
https://doi.org/10.1063/1.5119813
More Info
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Publication Year
2019
Language
English
Copyright
© 2019 D. Farhadi Machekposhti, J.L. Herder, N. Tolou
Research Group
Mechatronic Systems Design
Issue number
14
Volume number
115
DOI:
https://doi.org/10.1063/1.5119813
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Abstract

Microtransmission mechanisms made of elastic materials present an opportunity for exploring scalable mechanical systems integrated with sophisticated functionalities. This paper shows how the fundamentally limited range of motion in elastic mechanisms can be circumvented to create a frequency doubling functionality analog to angular velocity doubling in classical gears. The proposed mechanism utilizes the elastic deformation of its internal architecture and buckling of microflexures to perform frequency doubling kinematics. We demonstrate this by the fabrication of a microtransmission device for application in mechanical wrist watches. A key benefit of the proposed method is that such a transmission system can be integrated and fabricated as an embedded part of microarchitected materials to boost the frequency characteristics of energy storage, actuators, and inertial sensors to perform adequately for different applications.

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