Influence of bias angle on output performance of nonlinear asymmetric energy harvesters

Experimental investigation

Wei Wang, Junyi Cao, Ying Zhang, Chris R. Bowen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In recent decades, the technique of piezoelectric energy harvesting has drawn a great deal of attention since it is a promising method to convert vibrational energy to electrical energy to supply lower-electrical power consumption devices. The most commonly used configuration for energy harvesting is the piezoelectric cantilever beam. Due to the inability of linear energy harvesting to capture broadband vibrations, most researchers have been focusing on broadband performance enhancement by introducing nonlinear phenomena into the harvesting systems. Previous studies have often focused on the symmetric potential harvesters excited in a fixed direction and the influence of the gravity of the oscillators was neglected. However, it is difficult to attain a completely symmetric energy harvester in practice. Furthermore, the gravity of the oscillator due to the change of installation angle will also exert a dramatic influence on the power output. Therefore, this paper experimentally investigates the influence of gravity due to bias angle on the output performance of asymmetric potential energy harvesters under harmonic excitation. An experimental system is developed to measure the output voltages of the harvesters at different bias angles. Experimental results show that the bias angle has little influence on the performance of linear and monostable energy harvesters. However, for an asymmetric potential bistable harvester with sensitive nonlinear restoring forces, the bias angle influences the power output greatly due to the effect of gravity. There exists an optimum bias angle range for the asymmetric potential bistable harvester to generate large output power in a broader frequency range. The reason for this phenomenon is that the influence of gravity due to bias angle will balance the nonlinear asymmetric potential function in a certain range, which could be applied to improve the power output of asymmetric bistable harvesters.

Original languageEnglish
Title of host publicationProceedings of ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages7
ISBN (Electronic)9780791851852
DOIs
Publication statusPublished - 2018
EventASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2018 - Quebec City, Canada
Duration: 26 Aug 201829 Aug 2018

Publication series

Name30th Conference on Mechanical Vibration and Noise
Volume8

Conference

ConferenceASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2018
CountryCanada
CityQuebec City
Period26/08/1829/08/18

ASJC Scopus subject areas

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modelling and Simulation

Cite this

Wang, W., Cao, J., Zhang, Y., & Bowen, C. R. (2018). Influence of bias angle on output performance of nonlinear asymmetric energy harvesters: Experimental investigation. In Proceedings of ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (30th Conference on Mechanical Vibration and Noise; Vol. 8). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/DETC2018-85479

Influence of bias angle on output performance of nonlinear asymmetric energy harvesters : Experimental investigation. / Wang, Wei; Cao, Junyi; Zhang, Ying; Bowen, Chris R.

Proceedings of ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers (ASME), 2018. (30th Conference on Mechanical Vibration and Noise; Vol. 8).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wang, W, Cao, J, Zhang, Y & Bowen, CR 2018, Influence of bias angle on output performance of nonlinear asymmetric energy harvesters: Experimental investigation. in Proceedings of ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. 30th Conference on Mechanical Vibration and Noise, vol. 8, American Society of Mechanical Engineers (ASME), ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2018, Quebec City, Canada, 26/08/18. https://doi.org/10.1115/DETC2018-85479
Wang W, Cao J, Zhang Y, Bowen CR. Influence of bias angle on output performance of nonlinear asymmetric energy harvesters: Experimental investigation. In Proceedings of ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers (ASME). 2018. (30th Conference on Mechanical Vibration and Noise). https://doi.org/10.1115/DETC2018-85479
Wang, Wei ; Cao, Junyi ; Zhang, Ying ; Bowen, Chris R. / Influence of bias angle on output performance of nonlinear asymmetric energy harvesters : Experimental investigation. Proceedings of ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers (ASME), 2018. (30th Conference on Mechanical Vibration and Noise).
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