A Mechanical System Designed to Exhibit Bistable Stochastic Resonance

Daniel W. Brubaker

A bistable mechanical device was built to exhibit Stochastic Resonance (SR) in the first element and Noise Enhanced Propagation (NEP) in an array of coupled similar elements. The first element was studied while forced at a fixed frequency and amplitude. Four different realizations of noise were applied to the bistable element by shaking its base with wheels of four different offsets. The standard deviation of the noise applied to the rocker was not correlated to the offset of the wheel. The phenomenon of stochastic resonance was not observed in the data collected due to an inherent flaw in the noise generation mechanism. Plans for an improved mechanical system are presented.