On the Nonlinear Behavior of the Piezoelectric Coupling on Vibration-Based Energy Harvesters

Figure 5

Results of power harvested versus the electrical resistive load at different frequencies (a) 95 Hz, (b) 109.5 Hz (resonance frequency), (c) 135 Hz, and (d) 160 Hz. Experimental data (scatter), LM (scatter line), NLM-L (dashed line), and NLM-Q (solid line) models.

(a)

(b)

(c)

(d)