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Smart Structures and Systems
  Volume 25, Number 4, April 2020, pages 393-399

Influence of material composition on buckling response of FG plates using a simple plate integral model
Shi-Baek Park and Seon-Jun Jang

    In this paper, the design method and experimental validation for the two-degree-of-freedom (2DOF) electromagnetic energy harvester are presented. The harvester consists of the rigid body suspended by four tension springs and electromagnetic transducers. Once the two resonant frequencies and the mass properties are specified, both the constant and the positions for the springs can be determined in the closed form. The designed harvester can locate two resonant peaks close to each other and forms the extended frequency bandwidth for power harvesting. Halbach magnet array is also introduced to enhance the output power. In the experiment, two resonant frequencies are measured at 34.9 and 37.6 Hz and the frequency bandwidth improves to 5 Hz at the voltage level of 207.9 mV. The normalized peak power of 4.587 mW/G2 is obtained at the optimal load resistor of 367 Ω.
Key Words
    vibration; energy harvester; resonant frequency; bandwidth; electromagnetic transducer; Halbach array
(1) Shi-Baek Park:
Department of Mechanical Engineering, Yonsei University, Seoul, 03722, Republic of Korea;
(2) Seon-Jun Jang:
School of Mechanical Engineering, Hoseo University, Asan 31499, Republic of Korea.

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