Influence of potential function asymmetries on the performance of nonlinear energy harvesters under white noise

Qifan He, Mohammed Daqaq

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

    Abstract

    To improve the broadband transduction capabilities of vibratory energy harvesters (VEHs) under random and non-stationary excitations, many researchers have resorted to purposefully introducing nonlinearities into the restoring force of the harvester. While performing this task, it is often very challenging to maintain a perfectly symmetric restoring force which usually yields a VEH with an asymmetric potential energy function. This paper investigates the influence of potential function asymmetries on the performance of nonlinear VEHs under white noise inputs. To that end, a quadratic nonlinearity is introduced into the restoring force of the harvester and its influence on the mean power for both mono-and bi-stable potentials is investigated. It is shown that, for VEHs with a mono-stable potential function, the mean output power increases with the degree of potential function asymmetry. On the other hand, for energy harvesters with a bi-stable potential function, asymmetries in the restoring force appear to worsen performance especially for low to moderate noise intensities. When the noise intensity becomes sufficiently large, the influence of the potential function's asymmetry on the mean power diminishes. Results also reveal that a VEH with a symmetric bi-stable potential function produces higher mean power levels than the one with the most asymmetric mono-stable potential. As such, it is concluded that a VEH with a bi-stable symmetric potential is most desirable to improve performance under white noise.

    Original languageEnglish (US)
    Title of host publication10th International Conference on Multibody Systems, Nonlinear Dynamics, and Control
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Volume6
    ISBN (Electronic)9780791846391
    DOIs
    StatePublished - Jan 1 2014
    EventASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2014 - Buffalo, United States
    Duration: Aug 17 2014Aug 20 2014

    Other

    OtherASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2014
    CountryUnited States
    CityBuffalo
    Period8/17/148/20/14

    Fingerprint

    Harvesters
    White noise
    Potential Function
    Asymmetry
    Power Mean
    Energy
    Nonlinearity
    Potential energy functions
    Influence
    Energy Function
    Broadband
    Excitation
    Output

    ASJC Scopus subject areas

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

    Cite this

    He, Q., & Daqaq, M. (2014). Influence of potential function asymmetries on the performance of nonlinear energy harvesters under white noise. In 10th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (Vol. 6). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/DETC201434397

    Influence of potential function asymmetries on the performance of nonlinear energy harvesters under white noise. / He, Qifan; Daqaq, Mohammed.

    10th International Conference on Multibody Systems, Nonlinear Dynamics, and Control. Vol. 6 American Society of Mechanical Engineers (ASME), 2014.

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

    He, Q & Daqaq, M 2014, Influence of potential function asymmetries on the performance of nonlinear energy harvesters under white noise. in 10th International Conference on Multibody Systems, Nonlinear Dynamics, and Control. vol. 6, American Society of Mechanical Engineers (ASME), ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2014, Buffalo, United States, 8/17/14. https://doi.org/10.1115/DETC201434397
    He Q, Daqaq M. Influence of potential function asymmetries on the performance of nonlinear energy harvesters under white noise. In 10th International Conference on Multibody Systems, Nonlinear Dynamics, and Control. Vol. 6. American Society of Mechanical Engineers (ASME). 2014 https://doi.org/10.1115/DETC201434397
    He, Qifan ; Daqaq, Mohammed. / Influence of potential function asymmetries on the performance of nonlinear energy harvesters under white noise. 10th International Conference on Multibody Systems, Nonlinear Dynamics, and Control. Vol. 6 American Society of Mechanical Engineers (ASME), 2014.
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