Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting

This paper focuses on several aspects extending the dynamical efficiency of a cantilever beam vibrating in the third mode. A few ways of producing this mode stimulation, namely vibro-impact or forced excitation, as well as its application for energy harvesting devices are proposed. The paper presents numerical and experimental analyses of novel structural dynamics effects along with an optimal configuration of the cantilever beam. The peculiarities of a cantilever beam vibrating in the third mode are related to the significant increase of the level of deformations capable of extracting significant additional amounts of energy compared to the conventional harvester vibrating in the first mode. Two types of a piezoelectric vibrating energy harvester (PVEH) prototype are analysed in this paper: the first one without electrode segmentation, while the second is segmented using electrode segmentation at the strain nodes of the third vibration mode to achieve effective operation at the third resonant frequency. The results of this research revealed that the voltage generated by any segment of the segmented PVEH prototype excited at the third resonant frequency demonstrated a 3.4–4.8-fold increase in comparison with the non-segmented prototype. Simultaneously, the efficiency of the energy harvester prototype also increased at lower resonant frequencies from 16% to 90%. The insights presented in the paper may serve for the development and fabrication of advanced piezoelectric energy harvesters which would be able to generate a considerably increased amount of electrical energy independently of the frequency of kinematical excitation.

[1]  Asan Gani Abdul Muthalif,et al.  Optimal piezoelectric beam shape for single and broadband vibration energy harvesting: Modeling, simulation and experimental results , 2015 .

[2]  ius,et al.  Investigation of dynamic of smart valve using holographic PRISM system , 2010 .

[3]  Giedrius Janusas,et al.  Influence of contact point location on dynamical and electrical responses of impact‐type vibration energy harvester based on piezoelectric transduction , 2014 .

[4]  Robert Szalai Impact Mechanics of Elastic Structures With Point Contact , 2014 .

[5]  D. Thomson,et al.  Monitoring acidic and basic volatile concentration using a pH-electrode based wireless passive sensor , 2015 .

[6]  Thiago G. Ritto,et al.  Choice of Measurement Locations of Nonlinear Structures Using Proper Orthogonal Modes and Effective Independence Distribution Vector , 2014 .

[7]  Yu Rong Wang,et al.  Analysis on the Effect of System Parameter on Double Cantilevers Vibro-Impact System Response , 2012 .

[8]  Vytautas Ostasevicius,et al.  Numerical Analysis of Dynamic Effects of a Nonlinear Vibro-Impact Process for Enhancing the Reliability of Contact-Type MEMS Devices , 2009, Sensors.

[9]  Minvydas Ragulskis,et al.  Applicability of holographic technique for analysis of nonlinear dynamics of MEMS switch , 2005, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[10]  Mehmet Kurt,et al.  Nonlinear system identification of the dynamics of a vibro-impact beam: numerical results , 2012 .

[11]  Christophe Voisin,et al.  Light harvesting with non covalent carbon nanotube/porphyrin compounds , 2013 .

[12]  Lei Gu,et al.  Low-frequency piezoelectric energy harvesting prototype suitable for the MEMS implementation , 2011, Microelectron. J..

[13]  Amin Bibo,et al.  Energy Harvesting Under Combined Aerodynamic and Base Excitations , 2012 .

[14]  Ioannis Raptis,et al.  Wireless Sensor Network Based on a Chemocapacitive Sensor Array for the Real-time Monitoring of Industrial Pollutants☆ , 2014 .

[15]  B. Krauskopf,et al.  Bifurcation analysis of a smoothed model of a forced impacting beam and comparison with an experiment , 2013, 1308.3647.

[16]  R R Trivedi,et al.  Shape Optimization of Electrostatically Actuated Micro Cantilever Beam with Extended Travel Range Using Simulated Annealing , 2011 .