Piezoelectric actuators are used in a number of countless fields and applications, from automotive or aerospace to home automation. This induces new needs in terms of required performance and features: materials with new properties and control of the strongly nonlinear behavior of the actuators. A major defect of piezoelectric actuators is that their open-loop control accuracy is seriously limited by hysteresis and creep effects.
HOW IT WORKS
The system propose a new combination of a voltage a load control wherein the switching control between the support and the voltage control is done automatically, depending on the nature of the voltage applied in input.
This allow to pilot the system with an stable linear closed loop.
It allows to control all kinds of actuators without modelization
The input / gain of the system is the same regardless of control signal frequency
Hysteresis below 1%: high reproducibility of the positioning (dynamic),
Creep Free – low linearity error & drift (static),
Nanometric precision for a more than 200 μm « course »,
Almost linear movement of the actuator,
No external circuit for the driving actuator necessary.
POC available to drive a Piezo
Demonstrator for a new tunable optic filter / Fabry–Pérot interferometer - available Mid 2016
Adaptive optics: optical filter, synchrotrons piezoelectric bimorph mirrors;
Air, Space & Defense;
Compact & Dynamic Actuation;
Sensing & Detection.