**6. Application example**

For a simpler demonstration of the potential for harvesting energy in a suspension system by means of piezoelectric material, a MATLAB® code to obtain the results was developed and presented below.

The dimensions of the piezoelectric disk are diameter *Dp* ¼ 0*:*065 *m* and thickness *hp* ¼ 0*:*025 *m*. The vehicle data and the properties of piezoelectric material PZT-5H are shown in **Tables 1** and **2**, as indicated in references [13, 14], respectively.

