1. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Schematic of the proposed VEH

2. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Photograph of the assembled system

3. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Mechanical lumped model of the VEH

4. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Algorithm flowchart

5. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Power harvesting electronics. Signals are shown with dashed lines.

6. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Frequency response of the secondary beam and the tunable beam at various tip mass positions. The secondary beam response is given as a single curve due to its negligible hysteresis.

7. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
The frequency response with and without tuning. The sweep rate is 1 Hz/min. The sleep period for the adaptive response is 4 s.

8. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
The effect of sweep rate on tuning performance

9. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Storage capacitor voltage during a frequency up-sweep and down-sweep between 49 Hz and 56 Hz

10. Date of download: 10/5/2017
Copyright © ASME. All rights reserved.
From: A Self-Sufficient and Frequency Tunable Piezoelectric Vibration Energy Harvester
J. Vib. Acoust. 2016;139(1): doi: /
Figure Legend:
Storage capacitor voltage time response in the discharge-recharge experiment