Voigt, A. (2023). An algorithm to approximate the real trilogarithm for a real argument. arXiv. http://doi.org/https://doi.org/10.48550/arXiv.2308.11619 (Original work published August 2023)
Abstract
We present an algorithm to approximate the real trilogarithm for a real argument with IEEE 754-1985 double precision accuracy. The approximation is structured such that it can make use of instruction-level parallelism when executed on appropriate CPUs.
Alhrshy, L., Lippke, A., & Jauch, C. (2023). Variable Blade Inertia in State-of-the-Art Wind Turbine Structural-Dynamics Models. Energies, 16(16), 22. http://doi.org/https://doi.org/10.3390/en16166061 (Original work published August 2023)
Abstract
This paper presents a comparison of two methods to represent variable blade inertia in two codes for aero-servo-elastic simulations of wind turbines: the nonlinear aeroelastic multi-body model HAWC2 and the nonlinear geometrically exact beam model BeamDyn for OpenFAST. The main goal is to enable these tools to simulate the dynamic behavior of a wind turbine with variable blade inertia. However, current state-of-the-art load simulation tools for wind turbines cannot simulate variable blade inertia, so the source code of these tools must be modified. The validity of the modified codes is proven based on a simple beam model. The validation shows very good agreement between the modified codes of HAWC2, BeamDyn and an analytical calculation. The add-on of variable blade inertias is applied to reduce the mechanical loads of a 5-megawatt reference wind turbine with an integrated hydraulic-pneumatic flywheel in its rotor blades.
van der Sluis, H., & Tausch-Nebel, L. (2023). “You can concentrate better on the topics and invest more time in it”: A case study evaluating the impact of immersive scheduling on students. Compass: Journal of Learning and Teaching, 16(2), 16. http://doi.org/https://doi.org/10.21100/compass.v16i2.1413 (Original work published August 2023)
Sietas, J., Petersen, K., & Gerken, J. M. (2023). Evaluierung und Optimierung von Business-Intelligence-Systemen in der öffentlichen Verwaltung - Ein Use-Case-basierter Ansatz. Anwendungen und Konzepte der Wirtschaftsinformatik (AKWI), 17. (Original work published Juli 2023)
Tausch-Nebel, L., & van der Sluis, H. (2023). „Man ist mehr im Stoff drin“ – Befunde aus der Verblockung von Grundlagenkursen. Die Neue Hochschule (DNH), (3/2023), 4. http://doi.org/10.5281/zenodo.7965492 (Original work published Juni 2023)
Königs, M., Baccouche, H., Breser, S., Jöns, T., & Löhlein, B. (2023). Simulation time reduction with 2.5D FEM-analysis for axial flux machines. Power Electronics and Drives (PEAD) , 8, 100–108. http://doi.org/http://dx.doi.org/10.2478/pead-2023-0008
Fu, W., Guo, F., Schlipf, D., & Pe\~na, A. (2023). Feedforward pitch control for a 15\,MW wind turbine using a spinner-mounted single-beam lidar. Wind Energy Science, 8, 1893–1907. http://doi.org/10.5194/wes-8-1893-2023