Nonlinear Resonance in MEMS and Its Implication for MEMS Performance

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.
Speaker(s): Dr. Hanna Cho,
Agenda:
6:30 – 7:00 PM Registration & Networking
7:00 – 7:45 PM Invited Talk
7:45 – 8:00 PM Questions & Answers
Virtual: https://events.vtools.ieee.org/m/410528