The block is designed to simulate a linear piezoelectric actuator without taking into account saturation. The actuator consists of a set of identical piezoelectric plates sandwiched between the electrodes (Figure 1).
Figure 1. Piezoelectric column
In steady-state mode, the actuator is described by the equations:
where:
sC and sR – positions of bodies at ports "C" and "R", respectively, m
FC and FR – forces at ports "C" and "R", respectively, N
N – number of layers
Kу – elasticity coefficient of a layer, N/m
U – control voltage, V
K – electromechanical coupling coefficient, N/V
The direction of extension of the piezoelectric element is taken as the positive direction of the force FR. The positive voltage direction is taken as the direction from port "+" to port "-".
The number of layers (N) is displayed next to the block.
Inputs
Name
Description
Connection line type
+
Electrical signal port
Electrical
-
Electrical signal port
Electrical
C
Port for connecting a conditionally fixed case (case)
Translatory mechanics
Outputs
Name
Description
Connection line type
R
Port for connecting a conditionally movable rod (rod)
