A Broadband Vibration-Based Energy Harvester Using an Array of Piezoelectric Beams Connected by Springs

Figure 3

First nine vibration modes of three elastically connected beams with identical tip masses and spring constants ().

(a) Mode 1

(b) Mode 2

(c) Mode 3

(d) Mode 4

(e) Mode 5

(f) Mode 6

(g) Mode 7

(h) Mode 8

(i) Mode 9