TY - CHAP A1 - Rabold, Andreas A1 - Châteauvieux-Hellwig, Camille A1 - Hessinger, Joachim T1 - Flanking transmission at impact sound excitation - Calculation according to DIN 4109 and prEN ISO 12354-2 T2 - Proceedings of Inter-Noise 2016 KW - Berechnungsmethoden KW - Normung KW - Flankenübertragung Y1 - 2016 SN - 978-3-939296-11-9 ER - TY - CHAP A1 - Gibbs, Barry M. A1 - Mayr, Andreas R. T1 - Source quantities for vibro-acoustic transmission into lightweight building elements T2 - Proceedings of Inter-Noise 2016 KW - Körperschall KW - HolzLeichtBau KW - Körperschallquellen KW - Transmission KW - Installationen Y1 - 2016 SN - 978-3-939296-11-9 ER - TY - CHAP A1 - Châteauvieux-Hellwig, Camille A1 - Mecking, Simon A1 - Brummer, Benjamin A1 - Rabold, Andreas T1 - Anwendung zur SEA basierten Berechnung nach EN 12354 für Massivholzelemente T2 - Fortschritte der Akustik - DAGA KW - Berechnungsmethoden KW - Holzmassivbau KW - Flankenübertragung KW - Vibroakustik KW - Simulation Y1 - 2016 ER - TY - CHAP A1 - Solf-Leipold, Barbara T1 - Sozialräumliche Einflussfaktoren auf Engagement T2 - Abstractband zum Gerontologie und Geriatrie Kongress 2016 N2 - Beitrag im Rahmen des Symposiums Gerontologie und Altenarbeit: "Sozial-Raum-Qualität. Herausforderungen ländlicher Räume in der alternden Gesellschaft (09.09.2016, Gerontologie und Geriatrie Kongress 2016: Leben und Altern - Funktionalität und Qualität, 07.-10.09.2016, Stuttgart) KW - Sozialraumorientierung, Daseinsvorsorge, Bürgerschaftliches Engagement, Alter, Pflege Y1 - 2016 ER - TY - CHAP A1 - Stubenrauch, Franz A1 - Seliger, Norbert A1 - Schmitt-Landsiedel, Doris T1 - A Low Impedance Drive Circuit to Suppress the Spurious Turn-On in High Speed Wide Band-Gap Semiconductor Halfbridges T2 - PCIM Europe 2016; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Nürnberg N2 - A gate drive circuit for gallium nitride (GaN) enhancement mode (e-mode) transistors is presented, which avoids parasitic turn-on of the power devices in the halfbridge configuration. New e-mode GaN devices turn on at very low threshold voltages between 1V and 2V. This makes the transistors highly sensitive to spurious turn-on and thus reduces the required safety margin of the gate drive signals. To avoid this parasitic turn-on, a very low gate loop impedance is required. This prevents the halfbridge against bridge shorts during the switching events and guarantees stable gate drive control with increased switching efficiency. The new gate drive circuit is developed in a SPICE simulation environment and verified in a prototype setup by a double pulse test. The simulation matches very well with the experimental result and demonstrates the suppression of parasitic semiconductor turn-on with the proposed gate drive. Furthermore the dissipated switching energy is reduced, compared to a standard gate drive circuit. High DCDC converter efficiency of 98.67% at 1kW output power is achieved by using the driving circuit for a buck converter prototype with 200kHz switching frequency. KW - drive circuit Y1 - 2020 ER - TY - CHAP A1 - Stubenrauch, Franz A1 - Seliger, Norbert A1 - Schmitt-Landsiedel, Doris T1 - A Simplified SPICE Model for Fast Parametric Optimization of High Voltage Power Electronic Circuits in the Megahertz Range T2 - CIPS 2016; 9th International Conference on Integrated Power Electronics Systems, Nürnberg N2 - An accurate SPICE model is proposed in this paper to calculate the power losses of high voltage converter systems. This supports power circuit optimization in the very first design stage. The parasitic package inductances and the nonlinear voltage dependent semiconductor capacitances are taken into account. In addition the high frequency behavior of the power inductor is investigated. A detailed loss breakdown is done to analyze the main sources of power loss and their physical reasons. The simulation results of the converter waveforms and of its efficiency match very well to the experimental results. The prototype boost converter shows a top efficiency greater than 98.3 % at a switching frequency of 1 MHz and an output voltage of 400 V at the maximum output power of 1 kW. KW - SPICE model Y1 - 2016 ER - TY - CHAP A1 - Seliger, Norbert A1 - Stubenrauch, Franz A1 - Schmitt-Landsiedel, Doris T1 - A Parametric Layout Study of Radiated Emission from High-Frequency Half-Bridge Switching Cells T2 - CIPS 2016 - 9th International Conference on Integrated Power Electronics Systems, Nürnberg N2 - We present a numerical modeling study of radiated emission from half-bridge switching cells based on the method of moments (MoM). A low loop inductance cell design enables high-speed switching of power semiconductors which is demonstrated on a prototype circuit. The layout is further optimized for low radiated emission by variation of the heat sink placement. This is achieved by the heat sink attached to the phase terminal. The performance of the structure in terms of loop impedance, electric field radiation and sensitivity to cable attachments are numerically studied. Emission peaks arising from loop resonances can be reduced by over 20 dB with damping elements in the switching cell. The improved EMI performance of the proposed structure is attributed to decoupling of the loop current from the heat sink structure. KW - half-bridge switching cells Y1 - 2016 ER - TY - CHAP A1 - Schemme, Michael T1 - Langfaserverstärkte Thermoplaste (LFT) Status und Perspektiven T2 - 22. Nationale Symposium SAMPE Deutschland e.V., Fürth KW - Kunststoff Y1 - 2016 ER - TY - CHAP A1 - Schemme, Michael T1 - Faserverbundkunststoffe Kompakt - Der Einstieg in die Technologie der FVK T2 - FVK Kompakt – Grundlagen Faserverbundkunststoffe, München KW - VDI Wissensforum Y1 - 2016 ER - TY - CHAP A1 - Wachter, M. A1 - Gottschalk, L. A1 - Simmler, M. A1 - Schulze, Achim A1 - Becker, F. A1 - Sayala, M. A1 - Hüttl, B. T1 - Short Circuit Current Measurements at Clear-Sky Conditions on Photovoltaic Modules: Basic for a Reliable Self-Reference Algorithm T2 - Proc. 32nd European Photovoltaic Solar Energy Conference and Exhibition (PVSEC) N2 - Outdoor or just on site analyzes of photovoltaic modules can offer some advantages in comparison to indoor Lab studies. In this way the electrical performance is monitored and logged under natural operating conditions in full range of irradiation and temperature. The entirety of monitored IV data allows deriving low-light characteristics of electric parameters, temperature coefficients and root cause analysis for possible degradation. We apply so-called self-reference algorithm in order to increase the accuracy of analysis. The improved precision is due to application of effective acting irradiation and effective temperature instead of externally measured data. Effective irradiation is determined in self-referencing scheme: the short circuit current of the module is assigned to the irradiation. This assignment has to be calibrated, preferably at standard test conditions for irradiation. In this contribution we demonstrate a process of precise measurement of Isc under clear-sky outdoor conditions and the determination of the short circuit current for STC. The measurement method avoids errors by spectral deviations with respect to AM 1.5G spectrum, by optical reflection losses for high angles of incidence and errors by high albedo impact. In particular we investigate comparatively a CdTe module under outdoor conditions and by means a calibrated indoor Lab flasher. KW - Photovoltaic systems, Metrology, Solar Modules Y1 - 2016 PB - 32nd European Photovoltaic Solar Energy Conference and Exhibition (PVSEC) ER - TY - CHAP A1 - Hüttl, B. A1 - Wachter, M. A1 - Gottschalk, L. A1 - Schulze, Achim A1 - Becker, F. T1 - Self Reference Algorithm for Precise Outdoor Characterization of PV Modules T2 - PV-Days Halle 2016 N2 - Outdoor or just on site analyzes of photovoltaic modules can offer some advantages in comparison to indoor Lab stud-ies. In this way the electrical performance is monitored and logged under natural operating conditions in full range of irradiation and temperature. The entirety of monitored IV data allows deriving low-light characteristics of electric parameters, temperature coefficients and root cause analysis for possible degradation. We apply so-called self-reference algorithm in order to increase the accuracy of analysis. The improved precision is due to application of effective acting irradiation and effective temperature instead of externally measured data. Effective irradiation is determined in self-referencing scheme: the short circuit current of the module is assigned to the irradiation. KW - Photovoltaic systems, Metrology, Solar Modules Y1 - 2016 PB - PV-Days Halle 2016 CY - Halle ER - TY - CHAP A1 - Hirschmüller, Sebastian A1 - Marte, Roman A1 - Pravida, Johann ED - Eberhardsteiner, Josef ED - Winter, Wolfgang ED - Fadai, A. ED - Pöll, Martha T1 - Laminated veneer lumber poles for temporary soil nailing ‐ investigation of material properties T2 - Proceedings of the World Conference on Timber Engineering. World Conference on Timber Engineering. Vienna, 22.‐25.08. Vienna N2 - Within a current research project at Rosenheim University of Applied Sciences and Graz University of Technology the possibilities of using beech wood laminated veneer lumber poles as soil anchors for temporary soil nailing systems are investigated. Therefore tensile and bending properties of laminated veneers with high moisture and permanent cement contact concerning the influence of veneer bending rectangular to the fibre are determined. For investigation of material properties under different climate conditions tensile tests on small and faultless single beech wood veneers as well as tensile tests on 6 layered 3 mm samples and 9 layered 2 mm samples were carried out. Therefore all samples were stored in extreme climate conditions like high moisture content and permanent cement contact. Six layered samples with 3mm thick veneers show a slightly higher strength and stiffness under dry conditions as well as at a moisture content of the samples above fibre saturation. A strength reduction factor concerning temporary geotechnical applications is suggested which considers the influence of long term loading, veneer bending, water saturation and cement destruction on tensile properties of laminated veneer lumber poles. KW - Timber engineering KW - Laminated veneer KW - Temporary soil nailing Y1 - 2016 ER - TY - CHAP A1 - Hirschmüller, Sebastian A1 - Pravida, Johann A1 - Marte, Roman A1 - Flach, Michael ED - Universität Stuttgart, T1 - Laminated veneer lumber poles for use in temporary soil nailing. Investigation of adhesive properties. T2 - Holzbau Forschung und Praxis. 6. Doktorandenkolloqium 2016 N2 - Within a current research-project the possibility of using laminated veneer lumber beech wood poles as temporary soil anchors in foundation engineering is investigated. Within this project adhesive properties of laminated veneer lumber beech wood poles are determined. For use in temporary ground applications the influence of veneer bending, veneer thickness and intensive cement contact is concerned. As standard version two different adhesive systemsmelamine formaldehyde resin (MUF) and a 1-component polyurethane adhesive (PUR) were investigated and compared. Melamine formaldehyde resin glued samples with 3 mm thick veneers and 1.0N/mm² press force show a higher tensile shear strength but also a higher adhesive failure percentage than polyurethane glued samples. In case of melamine formaldehyde resins the closed time has a great influence on bond line quality. A long closed time reveals a low penetration of adhesive in the cells and a low embedding on the wood surface. For curved structures best results were achieved with a bonding pressure of 1.0 N/mm². A significant difference in strength between the concerned MUF and PUR adhesive system was not recognized. KW - Timber engineering KW - Laminated veneer KW - Temporary soil nailing Y1 - 2016 ER - TY - CHAP A1 - Zeller, Marc A1 - Höfig, Kai T1 - INSiDER: Incorporation of system and safety analysis models using a dedicated reference model T2 - 2016 Annual Reliability and Maintainability Symposium (RAMS) N2 - In order to enable model-based, iterative design of safety-relevant systems, an efficient incorporation of safety and system engineering is a pressing need. Our approach interconnects system design and safety analysis models efficiently using a dedicated reference model. Since all information are available in a structured way, traceability between the model elements and consistency checks enable automated synchronization to guarantee that information within both kind of models are consistent during the development life-cycle. KW - Safety KW - CFT Y1 - 2016 SP - 1 EP - 6 ER - TY - CHAP A1 - Möhrle, Felix A1 - Zeller, Marc A1 - Höfig, Kai A1 - Rothfelder, Martin A1 - Liggesmeyer, Peter T1 - Automating compositional safety analysis using a failure type taxonomy for component fault trees T2 - Risk, Reliability and Safety: Innovating Theory and Practice: Proc. of ESREL N2 - Safety assurance is a major challenge in the design of today’s complex embedded systems and future Cyber-physical systems. Changes in a system’s architectural design invalidate former safety analyses and require a manual adaptation of related safety analysis models in order to restore consistency. In this work, we present an approach for automating the compositional assembly of Component Fault Trees by automatically generating mappings between their input and output failure modes. Therefore, we propose a taxonomy of failure types for annotating model elements and deriving a model of the failure propagation. This way, automatic and system-wide safety analyses can be executed and easily repeated after making modifications to the system’s architecture. We demonstrate the feasibility of our approach using an example ethylene vaporization unit from an industrial domain. KW - Compositional safety analysis KW - CFT Y1 - 2016 SP - 1380 EP - 1387 ER - TY - CHAP A1 - Rabold, Andreas T1 - Holzbalkendecken im Neubau und in der Altbausanierung: Planung und Nachweis T2 - Bauphysikerinnentreffen, Wien KW - Holzbalkendecken KW - Altbausanierung KW - Neubau Y1 - 2018 ER - TY - CHAP A1 - Taubitz, C. A1 - Schulze, Achim A1 - Köntopp, M.B. T1 - Potential-Induced Degradation: An improved unterstanding of mechanicm and infuence factors T2 - Proceedings of the 32nd EU-PVSEC KW - Potental-Induced Degradation KW - Mechanism KW - Influence factors Y1 - 2016 ER - TY - CHAP A1 - Wachter, M. A1 - Gottschalk, L. A1 - Simmler, M. A1 - Schulze, Achim A1 - Becker, F. A1 - Sayala, M. A1 - Hüttl, B. T1 - Short-cicuit current measurement at clear-sky conditions on photovoltaik modules T2 - Proceedings of the 32nd EU-PVSEC KW - Photovoltaik KW - Short circuit current measurement Y1 - 2016 ER - TY - CHAP A1 - Auer, Veronika A1 - Zscheile, Matthias A1 - Engler, Benjamin A1 - Haller, Peer A1 - Hartig, Jens A1 - Wehsener, Jörg A1 - Husmann, Kai A1 - Erler, Jörn A1 - Thole, Volker A1 - Schulz, Tino A1 - Hesse, Elfi A1 - Rüther, Norbert A1 - Himsel, Alexandra ED - Eberhardsteiner, J. ED - Winter, W. ED - Fadai, A. ED - Pöll, M. T1 - BIOECONOMY CLUSTER: resource efficient creation of value from beech wood to bio-based building materials. T2 - WCTE 2016. CD-ROM Proceedings of the World Conference on Timber Engineering. KW - Holz KW - Bioeconomy KW - Beach wood KW - Wooden Building Y1 - 2016 ER - TY - CHAP A1 - Schöpfer, Fabian A1 - Hopkins, Carl A1 - Mayr, Andreas R. A1 - Schanda, Ulrich T1 - Modelling structure-borne sound transmission across a timber-frame wall using SEA. T2 - Proceedings of InterNoise 2016, Hamburg, Germany N2 - This paper concerns the modelling of sound transmission across a timber-frame wall under mechanical excitation by a point force using Statistical Energy Analysis (SEA). The aim is to develop and experimentally validate a model that would be relevant to machinery such as a heating device or a ventilation system that are often connected to such walls. The prediction is compared against measurements on a wall that forms part of a lightweight test-rig in the Laboratory for Sound Measurement (LaSM) at the University of Applied Sciences Rosenheim. A basic timber frame was built with a single layer of tongue and grooved chipboard on each side of the wall. With this configuration the structure represented a lightweight construction with horizontal junctions in addition to the vertical junctions that are more typical with lightweight constructions formed from plasterboard. A series of SEA models were developed with an increasing degree of complexity regarding the partitioning of the structure into subsystems. Additional experimental work was carried out to determine coupling loss factors across the chipboard joints which were then incorporated in the model. The SEA predictions are compared with measured velocities on both leaves and sound pressure levels in the cavities. KW - structure-borne sound transmission KW - timber-frame wall Y1 - 2016 ER -