Effects of system parameters and damping on an optimal vibration-based energy harvester

Mohammed Daqaq, Jamil M. Renno, Justin R. Farmer, Daniel J. Inman

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

    Abstract

    The authors present a comprehensive study of the effects of damping and electromechanical coupling on the power optimality of a vibration-based energy harvester. The harvester under consideration utilizes a piezoceramic element operating in the {33} mode to scavenge mechanical energy emanating from a sinusoidal-base excitation. Under typical operating conditions, the piezoceramic element is subjected to small strains and low electric fields, which allows for the adaptation of the linear small-signal constitutive law to model its behavior. To optimize the harvested power, previous researches neglected the role of mechanical damping. This lead to results suggesting that the optimal-harvesting frequencies are not effected by mechanical damping. However, in this paper, exact expressions for the optimal frequency ratios that account for damping are derived. The results show that mechanical damping affects the optimal frequency ratios and optimal harvested power qualitatively and quantitatively. The effects of the electromechanical coupling coefficient is also explored. It is observed that there is an optimal value of the coupling coefficient beyond which the harvested power decreases. This result breaks the taboo suggesting that larger electromechanical coupling culminates in more efficient energy harvesting devices. Additionally, it is shown that at the optimal frequencies, and optimal load resistance, increasing the electromechanical coupling saturates the harvested power.

    Original languageEnglish (US)
    Title of host publicationCollection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
    Pages7901-7911
    Number of pages11
    Volume8
    StatePublished - Aug 6 2007
    Event48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - Waikiki, HI, United States
    Duration: Apr 23 2007Apr 26 2007

    Other

    Other48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
    CountryUnited States
    CityWaikiki, HI
    Period4/23/074/26/07

    Fingerprint

    Harvesters
    Electromechanical coupling
    Vibrations (mechanical)
    Damping
    Energy harvesting
    Electric fields

    ASJC Scopus subject areas

    • Architecture
    • Materials Science(all)
    • Aerospace Engineering
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Daqaq, M., Renno, J. M., Farmer, J. R., & Inman, D. J. (2007). Effects of system parameters and damping on an optimal vibration-based energy harvester. In Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference (Vol. 8, pp. 7901-7911)

    Effects of system parameters and damping on an optimal vibration-based energy harvester. / Daqaq, Mohammed; Renno, Jamil M.; Farmer, Justin R.; Inman, Daniel J.

    Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Vol. 8 2007. p. 7901-7911.

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

    Daqaq, M, Renno, JM, Farmer, JR & Inman, DJ 2007, Effects of system parameters and damping on an optimal vibration-based energy harvester. in Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. vol. 8, pp. 7901-7911, 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Waikiki, HI, United States, 4/23/07.
    Daqaq M, Renno JM, Farmer JR, Inman DJ. Effects of system parameters and damping on an optimal vibration-based energy harvester. In Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Vol. 8. 2007. p. 7901-7911
    Daqaq, Mohammed ; Renno, Jamil M. ; Farmer, Justin R. ; Inman, Daniel J. / Effects of system parameters and damping on an optimal vibration-based energy harvester. Collection of Technical Papers - 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Vol. 8 2007. pp. 7901-7911
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