Device Packaging 2019

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Coupling Induced Oscillations in Bistable Systems and Applications
Keywords: Oscillations, Systems Application, Extreme Cold
Recently, we have shown the emergence of oscillations in unforced, overdamped bistable dynamical systems having dynamics of the general form $\tau_F\dot{x}(t) = -\nabla_xU(x)$, subject to carefully crafted coupling schemes. The emergence of oscillations resulting from the coupling schemes affords a new architecture and operating paradigm for certain sensor system where it no longer requires an external bias signal used conventionally to force the system to switch between states and it holds the promise of dramatically increasing the sensitivity of the device over the conventional architecture for the system. The concept takes full advantage of the inherent nonlinearity in the device and the increase in performance is a direct result of tuning the sensor to operate in its most sensitive regime near the bifurcation point that separates the oscillation regime from the steady state regime. The oscillation characteristics can be further controlled by tuning the control parameter (coupling strength). The concept has been successfully applied to two sensor systems: the magnetic sensor and the electric field sensor. The central idea can also be applied to other systems such as multi-frequency generation and central pattern generator for legged robotic locomotion control.
Mr. Visarath In , Senior Research Scientist
SPAWAR Systems Center
San Diego, CA

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