Parametric resonance of a nonlinear energy harvester for torsional vibrations
conference contributionposted on 08.05.2018, 08:59 by Panagiotis Alevras, Stephanos TheodossiadesStephanos Theodossiades, Homer Rahnejat, T. Saunders
Torsional vibrations occur commonly in power transmission systems and components. Often these vibrations are subject to transient frequency response, which are nevertheless dominated by fixed multiples of the main shaft speed (such as engine order vibrations). In this paper, a lightweight electromagnetic oscillator is proposed as an energy harvester from these torsional vibrations. A nonlinear spring is applied to tune the response of the oscillator to parametric excitations. Numerical analysis is carried out to predict output power of the harvester over a wide range of frequencies. The dynamics of the system offers the potential of increasing the effective operation band of the harvester, employing parametric resonance.
The authors wish to express their gratitude to the Engineering and Physical Sciences Research Council (EPSRC) for the financial support extended to the “Targeted energy transfer in powertrains to reduce vibration-induced energy losses” Grant (EP/L019426/1), under which this research was carried out.
- Mechanical, Electrical and Manufacturing Engineering