Note: Pseudo-charge-driver for grounded piezoelectric actuators with high linearity

This paper proposed a new method to drive grounded piezoelectric actuators linearly with high voltage using mirror actuator. One actuator is used for reference which is under charge drive while the other one named target actuator is under voltage drive, but the voltages applied on them are always the same. Both actuators show a very good linearity between the control voltage and their displacement. Two similar piezoelectric stacks were used to prove the principle. The experiments show that the displacement of the target actuator varies linearly with the control voltage, the total raw nonlinearity is less than 1%.