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    Nonlinear design and optimisation of a vibration energy harvester

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    Authors
    Diala, Uchenna
    Gunawardena, Rajintha
    Zhu, Yunpeng
    Lang, Zi-Qiang
    Affiliation
    University of Sheffield
    Issue Date
    2018-11-01
    
    Metadata
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    Abstract
    Nonlinear behavior has been exploited over the last decade towards improving the efficiency of most engineering systems. The effect of nonlinearities on a vibration energy harvester (VEH) has been widely studied. It has been reported in literature that a cubic damping nonlinearity extends the dynamic range (power/energy level) of a VEH system. It has also been widely shown that the operational bandwidth of a VEH system can be increased using a nonlinear hardening spring. As most energy harvesters have a maximum throw limited by the physical enclosure of the device, it is imperative to improve the operational conditions of the harvester within this limitation. This paper investigates the effects of a nonlinear hardening spring with cubic damping on a VEH system while assuming no limitation to the maximum throw (Practical VEH systems are constrained to a maximum throw and this is considered in a subsequent study). A frequency-based approach known as Output Frequency Response Function (OFRF) determined using the Associated Linear Equations (ALEs) of the nonlinear system model is employed. The OFRF polynomial is a representation of the actual system model hence used for the nonlinear VEH analysis and design. Based on the OFRF, optimal parameter values are designed to achieve any desired level of energy for the VEH.
    Citation
    Diala, U., Gunawardena, R., Zhu, Y. and Lang, Z.Q., (2018). 'Nonlinear design and optimisation of a vibration energy harvester'. UKACC 12th International Conference on Control (CONTROL), Sheffield, 5-7 September. New York: IEEE, pp. 180-185.
    Publisher
    IEEE
    Journal
    2018 UKACC 12th International Conference on Control (CONTROL)
    URI
    http://hdl.handle.net/10545/624679
    DOI
    10.1109/control.2018.8516821
    Additional Links
    https://ieeexplore.ieee.org/abstract/document/8516821
    Type
    Meetings and Proceedings
    Language
    en
    ISSN
    9781538628645
    ae974a485f413a2113503eed53cd6c53
    10.1109/control.2018.8516821
    Scopus Count
    Collections
    Department of Electronics, Computing & Maths

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