Nadav Cohen

Nadav Cohen, PhD

PhD Research: Theoretical and experimental study of double-well energy harvesters
Fields of interest: Designing educational experiments

Bistable vibration based energy harvesters

Single Degree of freedom bistable oscillator’s response to  sinusoidal excitation – 300 fps video

Two degrees of freedom bistable  –  frequency up-conversion

High frequency mode

Low frequency mode

Period three response of a bistable – bilinear oscillator exhibiting spatiotemporal symmetry

A Period one asymmetric response arising due to symmetry breaking bifurcation

Evolution in time of a bistable – bilinear oscillator exhibiting spatiotemporal symmetry

Slow Fast decomposition of bistable response

Slow fast decomposition done on the response of a bistable oscillator to harmonic excitation

3D representation of the evolution in time of the fast component shown in the plot on the left

Educational Experiment setup – Modes of a multi degree of freedom system

First Modal response – 300 fps

Second Modal response – 300 fps

Third Modal response – 300 fps

Fourth Modal response – 300 fps

Zero displacement of second mass