Investigation of Piezoelectric Energy Harvesting via Nonlinear Friction-Induced Vibration

Table 1

The parameters of the friction system set in the eigenvalues analysis.

Mass (slider)	0.08 kg	k3 (coupling spring in two directions)	600 N/m
k1 (including the stiffness of Piezo-1)	890 N/m	c1 = c2 (including the damping values of piezo elements)	0.077 N/(m/s)
knl (nonlinear contact stiffness)	1200 N/m^3	(force factor)	0.00036 N/V
k2 (linear contact stiffness)	500 N/m	(clamped capacitance of the piezo elements)	1.79 × 10^−7 F
(belt velocity)	5 mm/s∼200 mm/s	F (normal load)	20 N
R1	10 kΩ	R2	10 kΩ