Hybrid charge control for stick–slip piezoelectric actuators
|Title||Hybrid charge control for stick–slip piezoelectric actuators|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||Špiller, Martin, and Zdeněk Hurák|
|Page||100 - 108|
The article describes an analog electronic circuit for driving stick–slip piezoelectric linear actuators. The task for the amplifier is to provide a high-voltage asymmetric sawtooth-like signal and feed it into a capacitive load. Generation of excessive heat must be avoided while maximizing the slew rate. In order to guarantee a steady translation, the hysteretic behaviour of the piezoelectric material must be compensated. Combination of a charge control scheme with switching is proposed as an efficient solution. Laboratory experiments confirm the superiority of this tailored solution over other existing techniques based on versatile linear voltage amplifiers.