Talks and Poster Presentations (with Proceedings-Entry):
M. Poik, D. Kohl, G. Schitter:
"Similarity-based Feedback Control for Linear Operation of Piezoelectric Actuators";
Talk: 2018 IEEE/ASME International Conference on Advanced Intelligent Mechatronics,
Auckland (New Zealand);
- 07-12-2018; in: "2018 IEEE/ASME International Conference on Advanced Intelligent Mechatronics",
The positioning accuracy of piezoelectric trans-
ducers is limited by nonlinearities such as hysteresis and creep.
Improving the accuracy by feedback control is not always
desired or possible due to the difﬁcult integration of a position
sensor. The method presented in this paper uses two piezo-
electric transducers of the same type, to linearly operate one
of them without a sensor. The nonlinear voltage-displacement
relation of two transducers is analyzed and compared. It
is shown that their nonlinearities are almost identical. The
displacement of one of the transducers is measured and used
to control the displacement of the other one, reducing the
positioning error due to nonlinearities for a triangular reference
signal from 9.2 % to 0.3 % of the actuation range.
Created from the Publication Database of the Vienna University of Technology.