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Enhancing Energy Harvesting System Using Materials With Fractional Order Stiffness

[+] Author Affiliations
C. A. Kitio Kwuimy, C. Nataraj

Villanova University, Villanova, PA

G. Litak

Technical University of Lublin, Nadbystrzycka, Poland

Paper No. DSCC2013-4109, pp. V001T03A005; 5 pages
doi:10.1115/DSCC2013-4109
From:
  • ASME 2013 Dynamic Systems and Control Conference
  • Volume 1: Aerial Vehicles; Aerospace Control; Alternative Energy; Automotive Control Systems; Battery Systems; Beams and Flexible Structures; Biologically-Inspired Control and its Applications; Bio-Medical and Bio-Mechanical Systems; Biomedical Robots and Rehab; Bipeds and Locomotion; Control Design Methods for Adv. Powertrain Systems and Components; Control of Adv. Combustion Engines, Building Energy Systems, Mechanical Systems; Control, Monitoring, and Energy Harvesting of Vibratory Systems
  • Palo Alto, California, USA, October 21–23, 2013
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-5612-3
  • Copyright © 2013 by ASME

abstract

A bistable mechanical system having fractional order restoring force is considered for possible energy harvesting. The effects of the fractional order stiffness α on the crossing well dynamics (large amplitude motion) and the output electrical power are analyzed. The harvested electric power appears to be efficient for deterministic and random excitation, for small α (α ≈ 2). High level noise intensity was found to reduce the output power in the region of resonance and surprisingly increases the outup in other region of α. For larger enough amplitude of harmonic excitation this effect is realized in a stochastic resonance.

Copyright © 2013 by ASME

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