TY - JOUR A1 - Effenberger, Thomas A1 - Yalamanchili, Rajanya A1 - Stubenrauch, Franz T1 - Optimierung komplexer elektrischer Antriebssysteme durch Modellierung, Simulation und Codegenerierung in Simulink® JF - Tagungsband , AALE 2026 , Mechatronische Systeme für die Automatisierung: Fortschritt durch Präzision und Flexibilität N2 - Komplexe elektrische Antriebssysteme können im Designprozess auf unterschiedliche Weise modelliert und optimiert werden. Eine umfassende Abbildung aller Systemkomponenten in einem Modell und hohe Simulationsgeschwindigkeit reduzieren Fehler, erhöhen Flexibilität und Zuverlässigkeit und verbessern die Time-to-Market. Gleichzeitig muss gewährleistet sein, dass aus den optimierten Ergebnissen ohne fehleranfällige manuelle Schritte implementierbarer Code oder Hardwarebeschreibungen generiert werden können. Diese Arbeit zeigt die Unterschiede zwischen kausaler und akausaler Modellierung auf und demonstriert, dass insbesondere die akausale Modellierung in Kombination mit geeigneten Solvern für den physikalischen Anteil elektrischer Antriebssysteme zu effizienteren und schnelleren Simulationen führt. Durch das Vorausberechnen der Schaltzeitpunkte einer Pulsweitenmodulation und das gezielte Starten des Solvers kann – im Gegensatz zur vollständigen Abbildung des zugrunde liegenden hochauflösenden Taktsignals – eine Verkürzung der Simulationszeit um bis zu99 % erreicht werden. Dabei wird durchgängig die Kompatibilität zu Coder-Tools sichergestellt, insbesondere im Hinblick auf die Schnittstellen zwischen den Teilmodellen. KW - Schnelle Simulation Y1 - 2026 U6 - https://doi.org/10.33968/2026.07 SP - 61 EP - 70 ER - TY - GEN A1 - Amer, Sherif A1 - Zentgraf, Peter A1 - Ober, Eduard T1 - Damping of Sloshing in a Moving Container T2 - Tagungsband | AALE 2026 N2 - Liquid sloshing limits speed, accuracy, and reliability of pick-and-place systems, laboratory automation, and mobile robots that transport open containers. Motivated by industrial anti-sloshing motion functions [1], this work presents a compact testbed and a simple open-loop strategy that reproduces the effect on a low-cost setup. A camera rigidly mounted to the carriage moves with the tank and records the free surface, enabling extraction of the visible surface angle per frame. The first two sloshing frequencies and the dominant-mode damping are identified from experiments. The dominant mode is then modeled as a lightly damped second-order system excited by the carriage motion. Two command-side strategies are compared: Zero-Vibration-Derivative (ZVD) input shaping and an inverse transfer function prefilter. The ZVD method delivers near-zero residual slosh after the end of the move with a predictable, fixed time extension equal to the damped period. The inverse function prefilter also suppresses the sloshing with the advantage of being a simpler approach. Both approaches are open-loop and need only the identified frequency and damping for a given fill level of the container. A single-mode simulation based on the identified model predicts the measured behaviour successfully, and both suppression strategies are verified in simulation and experiments. KW - Sloshing KW - input shaping KW - system identification KW - feedforward control KW - vibration suppression Y1 - 2026 U6 - https://doi.org/10.33968/2026.01 SP - 191 EP - 200 ER - TY - THES A1 - Brunner, Christian T1 - Kombinierte Positions- und Drehmomentmessung in Robotergelenken zur Steigerung von Genauigkeit und Dynamik N2 - Bei Knickarmrobotern haben die Gelenke aufgrund der seriellen Gelenkanordnung und der typischerweise langen Verbindungsglieder einen großen Einfluss auf die erreichbare Genauigkeit am Endeffektor. Mit dem Ziel, die Genauigkeit und Dynamik von Industrierobotern zu steigern, wird im Rahmen dieser Arbeit ein Sensorsystem entwickelt, das basierend auf mehreren verteilten Messungen der Winkelposition am Abtrieb eines Robotergelenks das Drehmoment sowie die Verkippung des Gelenks misst. Das Sensorsystem wird experimentell in einem dreiachsigen Versuchsroboter erprobt. Es werden Regelungskonzepte entworfen und untersucht, die auf Basis der zusätzlichen Messgrößen eine Steigerung der Genauigkeit und eine Verbesserung des dynamischen Verhaltens eines Industrieroboters ermöglichen. Die Verwendung eines Filters zur Kombination der antriebs- und abtriebsseitigen Winkelpositionen erlaubt eine Ausnutzung der höheren Genauigkeit der abtriebsseitigen Winkelmessung, ohne die Dynamik der Positionsregelung dadurch einzuschränken. Zudem wird eine Erweiterung der häufig verwendeten kaskadierten Einzelachsregelung mit drei Kaskaden um eine vierte Kaskade zur Regelung des abtriebsseitigen Moments vorgestellt. Diese ermöglicht eine vollständig auf abtriebsseitigen Messgrößen basierende Regelung des Roboters, die vor allem bei hohen Geschwindigkeiten eine erhebliche Verbesserung der Bahntreue bewirkt. Durch die Kompensation der Verkippung kann insbesondere die statische Laststeifigkeit gesteigert werden. KW - Knickarmroboter KW - Positionsmessung KW - Roboter Y1 - 2026 SN - 978-3-69030-144-2 PB - TEWIS CY - Garbsen ER - TY - GEN A1 - Krettek, Martin A1 - Hagl, Rainer A1 - Braml, Thomas T1 - Advancing Bridge Weigh-In-Motion with A Novel Optoelectronic Strain Sensor T2 - IABSE Symposium Tokyo 2025 Report N2 - Bridge Weigh-In-Motion (B-WIM) is a method of transforming a bridge structure into an instrument for traffic data collection. This is mainly achieved by a specific arrangement of sensors mounted underneath the bridge, with strain sensors being the most commonly used type. The acquisition and processing of the strain data allows the determination of the actual traffic loads, thus providing valuable information for road infrastructure management. This paper presents a novel B-WIM strain sensor based on optoelectronic position measurement technology. The sensor outperforms the conventionally used strain transducers in terms of their reported resolution capability. The resulting advantages are demonstrated by evaluating data collected from a stiff in-service bridge structure. Using the digital interface of the novel sensor, the paper also proposes a dedicated B-WIM system design. The design aims to simplify the implementation of the B-WIM method in practice. Y1 - 2026 U6 - https://doi.org/10.2749/tokyo.2025.1676 SP - 1676 EP - 1683 PB - International Association for Bridge and Structural Engineering CY - Zürich ER - TY - GEN A1 - Effenberger, Thomas A1 - Stubenrauch, Franz A1 - Dechant, Eduard A1 - Heldwein, Marcelo Lobo T1 - Resonances and Oscillations in DC Grids T2 - PCIM Conference 2025 N2 - A trend has been emerging in the field of industrial automation: direct current (DC) is making a comeback. This is due to the desire for greater energy efficiency and flexible, intelligent energy distribution. However, DC can still exhibit alternating current (AC) components from pulsating loads on an industrial grid, which may excite resonances. This work derives an equivalent circuit model for the grid and verifies it using a motor test bench. Design considerations for the DC link capacitance are presented to enable the integration into a decentralized drive. Y1 - 2026 U6 - https://doi.org/10.30420/566541322 ER - TY - GEN A1 - Lazar, Markus T1 - Überprüfung von KMGs BT - mit Hilfe von Kugelplatten T2 - Messunsicherheit praxisgerecht bestimmen – Prüfprozesse in der industriellen Praxis 2025 Y1 - 2026 ER - TY - CHAP A1 - Lazar, Markus T1 - Überprüfung der geometrischen Genauigkeit von Koordinatenmessgeräten T2 - Messunsicherheit praxisgerecht bestimmen – Prüfprozesse in der industriellen Praxis 2025 KW - Koordinatenmessgerät KW - Zwischenprüfung KW - Kugelplatte KW - ISO 10360 Y1 - 2026 SN - 978-3-18-092464-9 SN - 978-3-18-102464-5 SP - 197 EP - 214 PB - VDI Verlag CY - Düsseldorf ER - TY - GEN A1 - Helbig, Michael A1 - Seliger, Norbert T1 - Combinatorics of Inductance States in Reconfigurable Air Coils T2 - Proceedings 2nd International Conference on Recent Advances in Mathematics and Informatics (ICRAMI'25) N2 - We propose a group theory based mathematical model for unambiguous inductance states of a reconfigurable air coil inductor utilizing elastic snapping of wire segments. Vertical (axial) and horizontal winding symmetries under group actions reveal distinguishable tuning regions and individual variation states therein. The model is applied to coils of prismatic (cylinder like) and truncated pyramidal (conical like) shape with edges forming a regular polygon as basis, and verified by numerical magnet field simulation. KW - Inductance KW - Magnetic devices KW - Matrices KW - Group theory KW - Combinatorial mathematics Y1 - 2025 SN - 978-9909-00-770-9 ER - TY - JOUR A1 - Herz, Jonas A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - The Influence of Fillers on the Reinforcement Capabilities of Polypropylene Based Mono-Material and Core-Shell Fibers in Concrete, a Comparison JF - Polymers N2 - Noncorrosive concrete reinforcement, such as polymer fibers, is needed to overcome the current issues caused by corroded steel reinforcements. Fibers made of polypropylene show a low bonding behavior in concrete. Fillers can help to overcome this issue but often lead to reduced mechanical properties. Core-shell fibers, which split the mechanical properties and the bonding behavior between the core and the shell component, could be a solution. This study investigates mono-material and core-shell fibers produced with calcium carbonate and bentonite fillers and compares their behavior in tensile tests, density measurements, contact angle measurements, topography measurements, single fiber pull-out tests, reflected light microscopy, and thermogravimetric analysis. The fillers caused an increased drawability, resulting in higher mechanical properties. Further, in the core-shell fibers, the calcium carbonate increased the surface roughness, which led to a better anchoring of the fiber in concrete, which was also visible in the deformation during pull-out observed in reflected light microscopy pictures. The thermogravimetric analysis showed a delay in onset of degradation for fibers containing bentonite. KW - fibers KW - extrusion KW - coextrusion KW - polymer drawing KW - polypropylene KW - calcium carbonate KW - bentonite KW - core-shell KW - mono-material KW - concrete Y1 - 2025 U6 - https://doi.org/10.3390/polym17131781 VL - 17 IS - 13 PB - MDPI CY - Basel ER - TY - CHAP A1 - Yilmaz, Tugce A1 - Mari, Jorge A1 - Asam, Johann A1 - Kirner, Michael A1 - List, Andreas A1 - Fantauzzo, Lucia A1 - Seliger, Norbert T1 - AC Cycling Testing of SiC MOSFET Power Module T2 - Proccedings International exhibition and conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management (PCIM 2025) N2 - This paper details the development of an accelerated AC cycling test bench for evaluating the aging mechanisms of SiC MOSFET power modules. Contrary to classical HTGS and DGS which only exercise gate source stresses the AC Cycler switched under high voltage and current. Operating for about 235 hours, the system maintained stable thermal conditions thanks to an integrated cooling system. Key precursors of aging, such as increases in threshold voltage and on-state resistance were identified using static characterization curve tracer before and after the test. Gate charge and Vdson were also measured on-line with specially developed gate drivers. KW - power module KW - SiC KW - power cycling testing KW - MOSFET Y1 - 2025 SN - 978-3-8007-6541-6 U6 - https://doi.org/10.30420/566541341 SP - 2562 EP - 2567 PB - VDE VERLAG GMBH CY - Berlin ER - TY - CHAP A1 - Seliger, Norbert T1 - Introducing Environmental Sustainability in an RF and EMC Lab Course Utilizing Reusable, Recyclable and Biodegradable Circuits T2 - Proceedings IEEE educon 2025 N2 - We propose to introduce environmental sustainability in a radio frequency (RF) and electromagnetic compatibility (EMC) laboratory course for an electrical engineering bachelor’s program utilizing reusable, easily recyclable and ecologically harmless (biodegradable) circuits. Our concept is based on the replacement of state-of-the-art printed circuit boards by substrates with mechanically structured adhesive Cu and Zinc films. Furthermore, organic based circuit carriers can be substituted by biodegradable paper substrates. As an example for the RF lab, we discuss the design, simulation and experimental characterization of a microwave low-pass filter with 1.2GHz cut-off frequency. Secondly, for an EMC lab we suggest a prototype for power integrity (PI) studies based on the current imbalance method for reducing common mode radiated emission. As a novel feature during the lab course, the instructor in addition gives a lecture highlighting the electronic waste challenge, which is accompanied by group discussions on sustainability and recycling. As a final lab course task students are asked to disassemble the boards or prepare them for reuse, followed by material sorting and submission to recycling institutions. KW - Microstrip Filters KW - Electromagnetic Compatibility KW - Printed Circuits KW - Electronics Engineering Education KW - Electromagnetic Engineering Education KW - Biodegradable Electronics Y1 - 2025 U6 - https://doi.org/10.1109/EDUCON62633.2025.11016365 PB - IEEE ER - TY - CHAP A1 - Seliger, Norbert A1 - Leirich, Nico T1 - Reconfigurable single-layer air coil inductor with bistable compliant windings T2 - Proceedings EPE 25 N2 - We present an air coil with bistable compliant single layer windings. Due to stable elastic snapping deformation of wire segments, the self-inductance of the air coil can be precisely varied in multiple steps. A numerical and analytical design methodology is proposed and successfully validated by magneto-quasi-static field simulations and experiments on prototypes. KW - Reconfigurable resonant network KW - Passive component KW - Magnetic device KW - Winding topology KW - S- Parameters Y1 - 2025 U6 - https://doi.org/10.34746/epe2025-0012 PB - EPE Association ER - TY - CHAP A1 - Püschel, Maximilian A1 - Seliger, Norbert T1 - Multiple-Frequency Three Coil Inductive Power Transmission with Non-Linear Relay Resonator T2 - Proceedings Southeastcon 2025 N2 - We propose near-field inductive power transfer with three coils in the frequency range of a few MHz. The relay coil is part of a non-linear resonator having a diode connected in parallel to the resonant capacitor. We achieve power transfer at multiple frequencies which can be tuned by the input power level and mutual coupling between the coils. Higher harmonic generation is found dominant at lower input power, whereas subharmonic generation (period doubling and period quadrupling) is observed at high levels. Power transfer at subharmonics reveals robustness against level perturbations due to pronounced amplitude hysteresis effect. A circuit simulation based on standard non-linear diode SPICE models confirms the experimental results which are obtained on a demonstration prototype. KW - wireless power transfer KW - inductive power transmission KW - nonlinear circuits Y1 - 2025 SN - 979-8-3315-0484-7 U6 - https://doi.org/10.1109/SoutheastCon56624.2025.10971670 SN - 1558-058X SP - 34 EP - 39 PB - IEEE ER - TY - GEN A1 - Herz, Jonas A1 - Hefenbrock, Sophia A1 - Lorenz, Katharina A1 - Muscat, Dirk A1 - Strübbe, Nicole ED - Ediciones Uniandes, T1 - Polyketone-Polypropylene Core-Shell Fibers for Concrete Reinforcement T2 - Proceedings of the 39th International Conference of the Polymer Processing Society (PPS-39) N2 - Corrosion of the commonly used steel reinforcements weakens the structural strength of concrete. To oppose this issue, concrete reinforcements in the form of polymer fibers are investigated. These polymer fibers need a good bonding ability to concrete and good mechanical properties. This study investigates core-shell fibers produced from polyketone and polypropylene mixed with a compatibilizer. The core-shell fibers were produced by coextrusion and drawing. The fibers were analyzed by tensile tests, a single fiber pull-out test, contact angle measurements, scanning electron microscopy and thermogravimetric analysis. KW - Concrete Reinforcement KW - Core-Shell Fiber KW - Polyketone KW - Polypropylene Y1 - 2024 U6 - https://doi.org/10.51573/Andes.PPS39.GS.FF.1 SP - 167 EP - 177 ER - TY - GEN A1 - Krey, Adrian A1 - Zenz, Vitus A1 - Widera, Karolin A1 - List, Manuela A1 - Muscat, Dirk A1 - Strübbe, Nicole ED - Ediciones Uniandes, T1 - Reactive Extrusion of Lignocellulosic Biomass to Produce Biopolymer Monomers using High-Energy Radiation and Catalytic Acids T2 - Proceedings of the 39th International Conference of the Polymer Processing Society (PPS-39) N2 - The increasing prevalence of bio-based and biodegradable plastics as an alternative to traditional plastics derived from crude oil is a noteworthy trend. Polybutylene succinate (PBS), a plastic produced from succinic acid, is among the promising materials for the future. However, the production of bio-based succinic acid through biotechnical processes in controlled environments presents challenges. This process leads to increased costs and is currently not economically competitive compared to crude oil-based succinic acid production. In addition to succinic acid, levulinic acid is another monomer produced in the same process. A novel approach to the digestion of biomass has been developed to address the issue of biotechnological production of bio-based platform chemicals. This innovative process employs microwave radiation, pressure, and temperature to convert wood residues into succinic acid and levulinic acid. Various catalyst concentrations and biomass ratios were tested in a batch process, with high-pressure liquid chromatography (HPLC) and liquid chromatography–mass spectrometry (LC/MS) analyses revealing the formation of succinic acid, levulinic acid, formic acid, and 2 oxoglutaric acid. The results demonstrate that microwaves combined with a metal salt catalyst can be used to produce platform chemicals from lignocellulosic biomass. To further advance the continuous production of PBS, a twin-screw extruder was modified and adapted after the successful results obtained from the batch processes. This setup enables additional experiments to evaluate the transferability of batch process results to continuous reactions, facilitating the scale-up and economic viability of the overall PBS production process in the future. KW - Succinic Acid KW - Levulinic Acid KW - Biopolymer KW - Microwave KW - Wood Y1 - 2024 U6 - https://doi.org/https://doi.org/10.51573/Andes.PPS39.SS.BBB.6 SP - 329 EP - 337 ER - TY - JOUR A1 - Herz, Jonas A1 - Schusser, Verena A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Cold-Drawn Wood-Filled Polybutylene Succinate Macro-Fibers as a Reinforcing Material for Concrete JF - Polymers N2 - The corrosive behavior of steel reinforcements causes issues in the concrete industry. To overcome this issue, alternative noncorrosive reinforcements such as polymer fibers could be used. However, as environmental protection becomes more important, sustainability must also be considered in the solution. An alternative to polymers based on raw oil is bio-based polymers. This study investigates the suitability of polymer fibers produced from polybutylene succinate together with cellulose and wood fillers as concrete reinforcements. Different mixtures of polybutylene succinate, cellulose, and wood fillers were created, and fibers were produced using a multiple drawing process. The fibers were tested using tensile tests, a single-fiber pull-out test, contact angle measurements, reflected light microscopy, density measurements, and thermogravimetric analysis. The fillers were shown to decrease the mechanical properties as the particle size and filler amount increased, resulting in a reduction in Young’s modulus and tensile strength of 55% and 70%, respectively, while adhesion to concrete increased with particle size from 0.31 ± 0.02 N/mm2 without filler to 0.90 ± 0.10 N/mm2 for the best-performing material combination. Reflected light microscopy images show changes in the fiber surface before and after pull-out. The fiber density decreased from 1.26 ± 0.05 g/cm3 to 0.91 ± 0.04 g/cm3 with an increasing filler amount and particle size for a compound with 10 weight percent of wood filler 1. The fiber thermal stability decreased slightly with the addition of filler. The greatest effect was a reduction in the temperature to ≈58 °C at 1% weight loss when 10 weight percent of wood was added. This study proves the possibility of using bio-based materials as concrete reinforcements. KW - fibers KW - compounding KW - extrusion KW - multiple drawing KW - polybutylene succinate KW - microcrystalline cellulose KW - wood particles KW - concrete Y1 - 2025 U6 - https://doi.org/https://doi.org/10.3390/polym17030403 VL - 17 IS - 3 PB - MDPI CY - Basel ER - TY - JOUR A1 - Bley, Sandra T1 - Generative Künstliche Intelligenz verändert die Hochschullehre - Versprechen, Herausforderungen und Bedürfnisse. BT - QLS Newsletter der TH Rosenheim JF - LehreAktuell KW - highroq Y1 - 2025 IS - Wintersemester 2024/25 SP - 3 EP - 5 ER - TY - CHAP A1 - Seliger, Norbert A1 - Leirich, Nico T1 - Reconfigurable Board-to-Board Interconnect Utilizing Bistable Compliant Ribbon Wires T2 - 14th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) N2 - We propose a printed circuit board (PCB) interconnection utilizing elastically deformed ribbon wires. The wire deflection is designed as a bistable snapping mechanism, which enables post-assembly tuning of the geometry. Hence, a reconfigurable inductance is obtained, easing impedance matching and supporting signal integrity. Analytical solutions for partial and mutual inductance of buckled wires are developed, which are successfully validated by magneto-quasistatic field simulations and by experiments on a test structure for frequencies ranging from 100kHz to 100MHz. We demonstrate a tunable loop inductance from 25nH to 50nH at 10MHz. KW - compliant mechanism KW - reconfigurable interconnect KW - partial inductance KW - impedance matching Y1 - 2024 SN - 979-8-3315-0462-5 U6 - https://doi.org/10.1109/EMCCompo61192.2024.10742066 SP - 211 EP - 215 PB - IEEE CY - Turin ER - TY - CHAP A1 - Seliger, Norbert A1 - Leirich, Nico T1 - Compliant Mechanism based Planar Inductors for Reconfigurable Magneto-Inductive Wave Devices T2 - 18th International Congress on Artificial Materials for Novel Wave Phenomena - Metamaterials 2024 N2 - A reconfigurable planar inductor based on bistable compliant mechanism is proposed. Flexible snapping of wire elements is used for modification of the loop area and self inductance as well as for the mutual coupling between laterally arranged multiple inductors in a magneto-inductive wave (MIW) device. A mechanical model is presented building the basis for an analytical inductance model. The bistable reconfigurability is demonstrated experimentally and confirmed by numerical simulation results. KW - Magneto-Inductive-Wave Device KW - Reconfigurable Inductor KW - Compliant Mechanism Y1 - 2024 SN - 979-8-3503-7349-3 U6 - https://doi.org/10.1109/Metamaterials62190.2024.10703322 SP - X-243 EP - X-245 PB - IEEE CY - Crete ER - TY - CHAP A1 - Yalamanchili, R. A1 - Schlee, S. A1 - Märkl, M. A1 - King, F. A. T1 - Enhanced Time-Optimal Filter-Based Point-to-Point Trajectory Generation with Vibration Suppression T2 - The 10th International Conference on Mechatronics and Robotics Engineering (ICMRE), Milan, Italy, 2024 KW - Vibration Suppression Y1 - 2024 ER -