Eur. Phys. J. Plus (2014) 129: 211
https://doi.org/10.1140/epjp/i2014-14211-3

Regular Article

Complex response of a bistable laminated plate: Multiscale entropy analysis

¹ Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-807, Lublin, Poland
² Department of Mechanical Engineering, University of Bath, BA2 7AY, Bath, UK

^* e-mail: g.litak@pollub.pl

Received: 14 April 2014
Accepted: 31 August 2014
Published online: 6 October 2014

Abstract

The use of bistable laminates is a potential approach to realize more broadband piezoelectric based energy harvesting systems. Based on the experimental time series of a bistable laminate plate we have examined its dynamic response. The system was subjected to harmonic excitations showing the existence of single well and snap-through vibrations of periodic and chaotic character. To identify the dynamics of the system response we examine the frequency spectrum, phase portraits and multi-scaled entropy. It is observed that the composite multiscale entropy analysis can be used to identify complexity within the dynamic response successfully.