View Item 
      •   Home
      • 1. Schools
      • College of Engineering
      • School of Civil and Environmental Engineering (CEE)
      • CEE Journal Articles
      • View Item
      •   Home
      • 1. Schools
      • College of Engineering
      • School of Civil and Environmental Engineering (CEE)
      • CEE Journal Articles
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.
      Subject Lookup

      Browse

      All of DR-NTUCommunities & CollectionsTitlesAuthorsBy DateSubjectsThis CollectionTitlesAuthorsBy DateSubjects

      My Account

      Login

      Statistics

      Most Popular ItemsStatistics by CountryMost Popular Authors

      About DR-NTU

      Improving functionality of vibration energy harvesters using magnets

      Thumbnail
      Improving Functionality of Vibration Energy Harvesters Using Magnets_revision_v1.pdf (1.084Mb)
      Author
      Tang, Lihua
      Yang, Yaowen
      Soh, Chee Kiong
      Date of Issue
      2012
      School
      School of Civil and Environmental Engineering
      Version
      Accepted Version
      Abstract
      In recent years, several strategies have been proposed to improve the functionality of energy harvesters under broadband vibrations, but they only improve the efficiency of energy harvesting under limited conditions. In this work, a comprehensive experimental study is conducted to investigate the use of magnets for improving the functionality of energy harvesters under various vibration scenarios. First, the nonlinearities introduced by magnets are exploited to improve the performance of vibration energy harvesting. Both monostable and bistable configurations are investigated under sinusoidal and random vibrations with various excitation levels. The optimal nonlinear configuration (in terms of distance between magnets) is determined to be near the monostable-to-bistable transition region. Results show that both monostable and bistable nonlinear configurations can significantly outperform the linear harvester near this transition region. Second, for ultra-low-frequency vibration scenarios such as wave heave motions, a frequency up-conversion mechanism using magnets is proposed. By parametric study, the repulsive configuration of magnets is found preferable in the frequency up-conversion technique, which is efficient and insensitive to various wave conditions when the magnets are placed sufficiently close. These findings could serve as useful design guidelines when nonlinearity or frequency up-conversion techniques are employed to improve the functionality of vibration energy harvesters.
      Type
      Journal Article
      Series/Journal Title
      Journal of intelligent material systems and structures
      Rights
      © 2012 The Author(s). This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of intelligent material systems and structures, the Author(s). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1177/1045389X12443016].
      Collections
      • CEE Journal Articles
      http://dx.doi.org/10.1177/1045389X12443016
      Get published version (via Digital Object Identifier)

      Show full item record


      NTU Library, Nanyang Avenue, Singapore 639798 © 2011 Nanyang Technological University. All rights reserved.
      DSpace software copyright © 2002-2015  DuraSpace
      Contact Us | Send Feedback
      Share |    
      Theme by 
      Atmire NV
       

       


      NTU Library, Nanyang Avenue, Singapore 639798 © 2011 Nanyang Technological University. All rights reserved.
      DSpace software copyright © 2002-2015  DuraSpace
      Contact Us | Send Feedback
      Share |    
      Theme by 
      Atmire NV
       

       

      DCSIMG