Sensorless method for switching energy harvester based on self-sensing approach

Y. Yamamoto, K. Asahina, K. Yoshimizu, K. Makihara

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Vibration energy harvesting extracts electrical energy from vibrating structures. The past studies of vibration energy harvesting suggest that the efficiency can be improved by switch regulation in the harvesting circuit. The switch-regulation is carried out depending on the motion of the target structure with the use of vibration sensors such as displacement sensor or accelerometer. This paper proposes a new vibration self-sensing method for switching energy harvesters that do not use those vibration sensors. In this method, the voltage of the piezoelectric transducer is measured, and the structural vibrational status is estimated from the measured voltage. The transducer voltage is not smooth and does not maintain the sinusoidal wave even when the structure vibrates in a sinusoidal wave because the switch energy harvesting method inverses the transducer voltage at every period. Thus, we establish a state observer based on a Kalman filter to estimate three state values of the target harvesting system: modal displacement, modal velocity, and electric charge in the transducer. This paper describes the construction processes for the observer. The observed value is the transducer voltage. We also show an electric circuit for measuring the transducer voltage. Finally, we confirm the efficiency of the proposed state observer for switch harvesting with numerical simulations.

本文言語English
ホスト出版物のタイトルModeling, Simulation and Control; Bio-Inspired Smart Materials and Systems; Energy Harvesting
出版社American Society of Mechanical Engineers
ISBN(電子版)9780791850497
DOI
出版ステータスPublished - 2016
イベントASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2016 - Stowe, United States
継続期間: 2016 9月 282016 9月 30

出版物シリーズ

名前ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2016
2

Other

OtherASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2016
国/地域United States
CityStowe
Period16/9/2816/9/30

ASJC Scopus subject areas

  • 建築および建設
  • 土木構造工学
  • 制御およびシステム工学
  • 材料力学

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