Abstract
A piezoelectric element can be implemented as a micro drive in many precise applications. In one of them, a piezoelectric element is used as an electromechanical actuator in the form of a beam with the element attached to one side. The change of supplied voltage causes a change to the position its free end. When the piezobender actuator is controlled by voltage, the displacement of its free end depends on the difference in electric potentials supplied to its plates and on the actuator’s previous states. In the drive application an important parameter is the linearity of the characteristic of the actuators position. A distortion having the biggest impact on these characteristics is hysteresis. In this paper the model of open loop linearizing controller built on basis of piezobender hysteresis was presented. The principle operation of the controller is based on following the outer contour of the hysteresis loop which is scaled and rotated on a plane supplied voltage as an input signal and the position of the piezobender free end as response. The method of data acquisition and preparation for a hysteresis linearizing, algorithm for generating a correcting signal was shown. Also the results of the simulation were shown and discussed.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call