Investigations on copper welding using a frequency-doubled disk laser and high welding speeds. - In: 10th CIRP Conference on Photonic Technologies, (2018), S. 12-16
https://doi.org/10.1016/j.procir.2018.08.003
Description of the influence of two laser intensities on the spatter formation on laser welding of steel. - In: 10th CIRP Conference on Photonic Technologies, (2018), S. 475-480
https://doi.org/10.1016/j.procir.2018.08.147
Development and industrial application of a soft sensor using Markov random fields. - In: Proceedings 2018 Chinese Automation Congress (CAC), (2018), S. 544-549
https://doi.org/10.1109/CAC.2018.8623074
A mm-wave multi-beam directional and polarimetric agile front-end for 5G communications. - In: 2018 Asia-Pacific Microwave Conference proceedings, (2018), S. 672-674
https://doi.org/10.23919/APMC.2018.8617624
The influence of contaminated copper wires on the DC joule heating of connectors. - In: Electrical contacts - 2018, (2018), S. 17-23
https://doi.org/10.1109/HOLM.2018.8611711
On the design of long range multiaxial nanofabrication machines based on Cartesian nanopositioning systems with additional ultra precision rotations. - In: 33rd ASPE Annual Meeting, ISBN 978-1-887706-77-3, (2018), S. 527-532
As result of a comprehensive literature survey, the majority of nanopositioning and nanomeasuring machines (NPMMs) are based on three independent linear movements in a Cartesian coordinate system with a repeatability in the nanometer range. This in combination with the specific nature of sensors and tools (further on summarized as tool) limits the addressable part geometries. Depending on the tool in use, spherical and aspherical geometries as well as free-form surfaces cannot be measured or only to a certain limit. This article contributes to the enhancement of multiaxial machine structures by the implementation of rotational movements while keeping the precision untouched. A systematic parameter based dynamic evaluation approach was developed for the creation and selection of adequate machine structures for multiaxial nanopositioning systems (DOF>3). To support the selection, detailed parameter sets are generated containing explicit moving ranges, uncertainties, resolutions, reproducibilities and costs. The parameter sets are further detailed with derived characteristics such as deformations, vibrations or thermal influences due to the additional rotations based on FEA-models and verified experimental data. This approach is also applied to the rotation of the sample. The results are compared to those of the tool rotation and mixed versions. After all, the knowledge gained, is formed into general rules for the verification and optimization of design solutions for multiaxial nanopositioning machines. Out of these investigations, a rotation of the tool is a favourable solution. Kinematics with a high degree of fulfilment consider a common instantaneous center of rotation in the tool center point (T). Compared to a fixed tool position this leads to shifting deviations of (T) due to deformations of the frame depending on the actual mass distribution. In addition, deviations of (T) are caused by vibrations and thermal influences of the positioning system. The strict separation of the force frame and the metrology frame, thermal shielding and direct measuring systems for the deviation of (T) can compensate the effects that are dependent on the selected overall structure and positioning system.
Ultra precise motion error measurement of rotation kinematics for the integration in nanomeasuring and nanofabrication machines. - In: 33rd ASPE Annual Meeting, ISBN 978-1-887706-77-3, (2018), S. 122-126
The semiconductor industry has been done an incomparable progress during the last 60 years. With the ongoing reduction of the structure size by new fabrication techniques the nanomeasurement systems have also increased their performance [1]. Besides this development the measurement and fabrication of freeform surfaces, aspheric lenses or high aspect ratio structures are still highly challenging. There are different commercial and scientific approaches to measure on freeform surfaces [2, 3, 4, 5].
Application of the LASSO algorithm for fitting the multiexponential data of the NMR relaxometry. - In: International Conference on Mathematical Modelling in Physical Sciences, (2018), 012148, insges. 5 S.
https://doi.org/10.1088/1742-6596/1141/1/012148
Parameter identification and optimization of an oceanographic monitoring remotely operated vehicle. - In: 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), ISBN 978-1-5386-1654-3, (2018), insges. 10 S.
https://doi.org/10.1109/OCEANSKOBE.2018.8559202
Research on a 6-DoF magnetic levitation system. - In: 2018 53rd International Universities Power Engineering Conference (UPEC), ISBN 978-1-5386-2910-9, (2018), insges. 5 S.
https://doi.org/10.1109/UPEC.2018.8541883