Multifrequency Piezoelectric Energy Harvester Based on Polygon-Shaped Cantilever Array

Figure 4

Modal shapes of the harvester: (a) 14.41 Hz; (b) 25.926 Hz; (c) 73.981 Hz; (d) 199.53 Hz; (e) 214.56 Hz.

(a)

(b)

(c)

(d)

(e)