Prior to experimental validation, a system simulation was
performed using MATLAB SIMULINK. The target actuator
is the configured one above. First, the time-delay effect on
the IOL was verified. The original system had a maximum
stable range of 2.3 mm in theory, so a set point of 2 mm was
chosen to evaluate the problem. Then the PIESO controller was
simulated to extend its stable range and to follow the settling
point. After that, the PIESO controller’s performance under
external disturbances was evaluated using sinusoidal signals
to model the disturbances. The results are given and discussed
in Section VI.