Dual frequency parametric excitation of a nonlinear multi degree of freedom amplifier with a digitally modified topology

TL;DR

This paper explores a novel dual frequency parametric excitation method for nonlinear multi-degree-of-freedom mechanical amplifiers, combining analytical, numerical, and experimental approaches to enhance tunability and signal amplification.

Contribution

It introduces a digitally modified topology for multi-degree-of-freedom amplifiers using dual frequency parametric excitation, advancing the control and performance of such systems.

Findings

Enhanced tunability through multi-frequency excitation

Improved amplification with digitally modified topology

Validation via numerical and experimental results

Abstract

Mechanical or electromechanical amplifiers can exploit the high-Q and low noise features of mechanical resonance, in particular when parametric excitation is employed. Multi-frequency parametric excitation introduces tunability and is able to project weak input signals on a selected resonance. The present paper addresses multi degree of freedom mechanical amplifiers or resonators whose analysis and features require treatment of the spatial as well as temporal behavior. In some cases, virtual electronic coupling can alter the given topology of the resonator to better amplify specific inputs. An analytical development is followed by a numerical and experimental sensitivity and performance verifications, illustrating the advantages and disadvantages of such topologies.