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J. R. van Hulzen, G. Schitter, P. M. J. Van den Hof, J. van Eijk:
"Dynamics and Modal Control of Piezoelectric Tube Actuators";
Vortrag: 5th IFAC Symposium on Mechatronic Systems, Boston, USA; 13.09.2010 - 15.09.2010; in: "Proceedings of the 5th IFAC Symposium on Mechatronic Systems", (2010), S. 317 - 323.

In piezoelectric positioning systems the achievable bandwidth is often limited
by weakly damped resonant modes. System performance may be improved by avoiding the
excitation of these modes. If sufficient mechanical damping is present this can be done by shifting
resonant modes towards anti-resonant modes through manipulation of the mechanical boundary
conditions. In a second approach the anti-resonances may be shifted towards the resonances by
the application of modal actuation. Using this method the excitation of the second and higher
order modes is avoided by changing the distribution of actuation forces. This paper investigates
and compares the application of modal control techniques in systems based on piezoelectric
tube actuators such as atomic force microscopes using finite element analysis and experimental
verification.

Modal control, Mode analysis, Mechanical properties, Finite element analysis, Model based control, Microscopes