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123 results on '"Csencsics, Ernst"'

14. Resonant Rotational Reluctance Actuator for Large Range Scanning Mirrors

Author

Pechgraber, Daniel, Csencsics, Ernst, and Schitter, Georg

Abstract

This article presents the design, manufacturing, and evaluation of a scanning mirror system based on a novel resonant rotational reluctance actuator. The system comprises a ferromagnetic mover with a 15-mm aperture, which is actuated by the reluctance force generated by an actuator coil, whose magnetic flux is guided via a ferromagnetic yoke. An integrated angular position sensor system based on optical proximity sensors enables feedback control of the scanning amplitude. The actuator design locates the ferromagnetic yoke on the side of the mover, allowing for a large scanning range of $\mathbf {\pm 13.5}$$^\circ$ mechanical with a scanning frequency of $\mathbf {223}$ Hz. This outperforms the state-of-the-art systems in the performance metric scanning range times aperture size.

Published
2023
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33. Range Extension for Large-Scale Robotic Precision 3-D Measurements in Vibration-Prone Environments

Author

Wertjanz, Daniel, Berlakovich, Nikolaus, Csencsics, Ernst, and Schitter, Georg

Abstract

This article presents a range extension concept for a high-precision robotic inline 3-D measurement system. A scanning confocal chromatic sensor (SCCS) is integrated with a magnetically levitated and actuated measurement platform (MP) for the acquisition of 3-D images with submicrometer resolution, enabled by means of active sample-tracking to compensate for relative motion between the SCCS and the sample. Based on an intermediate range extension approach, the lateral scan area is pre-extended to enable a robotic repositioning of the 3-D measurement module, ensuring sufficient overlap regions between the individual 3-D image frames. Experimental results show that the proposed concept extends the 3-D measurement modules’ measurement range by about 80% of the lateral scan area within an acquisition time of about 90s. Range-extended 3-D measurements directly in a vibration-prone environment reveal that 97% of disturbing relative motion between the SCCS and the sample are compensated by the active sample-tracking approach. In this way, lab-like conditions for the SCCS are established directly in an industrial production line and, improving the measurement error by three orders of magnitude down to several tens of nanometers.

Published
2023
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