Achieving increased bandwidth for 4 degree of freedom self-tuning energy harvester. (28th April 2018)

• Record Type: Journal Article
• Authors: Staaf, L.G.H.; Smith, A.D.; Köhler, E.; Lundgren, P.; Folkow, P.D.; Enoksson, P.
• Is Part Of: Journal of sound and vibration. Volume 420(2018)
• Page Start: 165
• Page End: 173
• Publication Date: 2018-04-28
• Subjects: Energy harvesting -- Piezoelectric -- Intelligent wireless sensors -- Selftuning; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2018.01.045
• Languages: English
• ISSNs: 0022-460X

Abstract

Abstract: The frequency response of a self-tuning energy harvester composed of two piezoelectric cantilevers connected by a middle beam with a sliding mass is investigated. Measurements show that incorporation of a free-sliding mass increases the bandwidth. Using an analytical model, the system is explained through close investigation of the resonance modes. Resonance mode behavior further suggests that, by breaking the symmetry of the system, even broader bandwidths are achievable.