Talks and Poster Presentations (with Proceedings-Entry):
R. Schroedter, J. Grahmann, K. Janschek:
"Silicone Oil Damping for Quasi-static Micro Scanners with Electrostatic Staggered Vertical Comb Drives";
Talk: Joint Conference 8th IFAC Symposium on Mechatronic Systems (MECHATRONICS 2019), and 11th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2019),
Wien;
09-04-2019
- 09-06-2019; in: "Proceedings of the Joint Conference 8th IFAC Symposium on Mechatronic Systems (MECHATRONICS 2019), and 11th IFAC Symposium on Nonlinear Control Systems (NOLCOS 2019)",
R. Schroedter, J. Grahmann, K. Janschek (ed.);
IFAC-PapersOnLine/Elsevier,
52/15
(2019),
6 pages.
English abstract:
Many applications like image projection, distance sensors or spectroscopy require high speed quasi-static operating scanners with the size of several millimeters for the laser beam guidance. Quasi-static micro scanners with electrostatic staggered vertical comb drives of sizes up to 5 mm achieve remarkable mechanical deflections of ±8 degree and eigenfrequencies of several hundred Hertz. Closed-loop control of the scanner position highly reduces parasitic eigenfrequency oscillation when driving an arbitrary trajectory like triangle or saw tooth, but requires position feedback and high performant drive electronics for real-time control. In this contribution we investigate silicone oil to attenuate undesired oscillations by passive mechanic damping. We present experimental results with different viscosity and determine the resulting system parameters such as damping coefficient, eigenfrequency and permittivity, supported by transient simulations. While the permittivity, refractive index and damping increase significantly, the deceasing eigenfrequency results in slower admissible trajectories. The overall performance is assessed and compared to the active damping approach using closed-loop control of the micro scanner operating in air. Finally, a potential packaging technology is presented.
Keywords:
laser beam guidance, quasi-static micro scanner, electrostatic staggered vertical comb drive, silicone oil, viscous passive damping, permittivity, close-loop trajectory control
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1016/j.ifacol.2019.11.646
Electronic version of the publication:
https://publik.tuwien.ac.at/files/publik_283456.pdf
Created from the Publication Database of the Vienna University of Technology.