Piezoelectric Wind Energy Harvesting from Self-Excited Vibration of Square Cylinder

Figure 5

Time histories of transverse displacement, lift, and output voltage for regime of presynchronization (a, b, c); synchronization (d, e, f); postsynchronization (g, h, i) in the open-circuit system.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)