Nonlinear Resonance in MEMS and Its Implication for MEMS Performance
Virtual presentation by Dr. Hanna Cho, Associate Professor at Ohio State University
Abstract
Over the last few decades, we have witnessed various microsystems revolutionized fundamental and applied science. Due to their small size and low damping, these devices often exhibit significant nonlinearity, which narrows the operational range of these impressive applications. Therefore, understanding the mechanisms leading to nonlinearity in such systems is crucial for eliminating obstacles to their further development. Motivated by the need to advance current capabilities of Micro-Electro-Mechanical Systems (MEMS), our research has been focused on the implementation of intentional intrinsic nonlinearity in the design of micro resonators. We have demonstrated that harnessing nonlinearity enables the exploitation of various nonlinear phenomena, not attainable in linear settings, such as broadband resonances, dynamic instabilities, nonlinear hysteresis, and
passive targeted energy transfers.
We have developed a comprehensive analytical, numerical, and experimental methodology to consider structural nonlinearity as a main design factor, enabling to tailor mechanical resonances and achieve targeted performance. We investigated the mechanism of geometric nonlinearity in a non-prismatic microresonator and suggested strategies to tailor the various types of nonlinear resonance. Our more recent works focus on exploiting nonlinearity and multimodality simultaneously by internally coupling two or more modes through the mechanism of internal resonance. This talk will introduce various types of nonlinear phenomena realized in micro systems and discuss their unique behavioral features that can be exploited in the field of MEMS.
Date and Time
Location
Hosts
Registration
- Date: 27 Mar 2024
- Time: 06:30 PM to 08:00 PM
- All times are (UTC-07:00) Pacific Time (US & Canada)
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Jeronimo Segovia-Fernandez
IEEE SFBA MEMS & Sensors Chapter, Chair
- Starts 07 March 2024 09:29 PM
- Ends 27 March 2024 12:00 AM
- All times are (UTC-07:00) Pacific Time (US & Canada)
- No Admission Charge
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Speakers
Dr. Hanna Cho
Biography:
Dr. Hanna Cho is an Associate Professor in the Department of Mechanical and Aerospace Engineering at The Ohio State University. Dr. Cho earned her BS and MS degrees in Mechanical Engineering from Yonsei University, South Korea in 2002 and 2004, and a PhD at the University of Illinois at Urbana-Champaign (UIUC) in 2012. Dr. Cho's Micro/Nano Multiphysical Dynamics Lab explores nonlinear dynamics in micro/nanomechanical systems for MEMS, with applications in sensing, imaging, and energy harvesting. The lab also delves into the exploration of multi-physical dynamics that emerge in atomic force microscopy (AFM), with the aim of pushing the boundaries of AFM technology. Furthermore, her research extends to the application of microsystems and AFM in various material research areas, particularly in the fields of bio (bone mechanics) and energy (Li-ion batteries). She has received the Young Faculty Award and Director’s Fellowship from the Defense Advanced Research Project Agency (DARPA), along with the American Society of Mechanical Engineers (ASME) C.D. Mote Jr. Early Career Award, the OSU COE Lumley Research Award, and the Emerging Leader Award 2023 from Journal of Micromechanics and Microengineering. In 2023, Hanna Cho was elected as a fellow of the ASME. Currently, she serves as an associate editor for the ASME Journal of Computational and Nonlinear Dynamics and as a subject editor for Nonlinear Dynamics.
Agenda
6:30 – 7:00 PM Registration & Networking
7:00 – 7:45 PM Invited Talk
7:45 – 8:00 PM Questions & Answers