VDMA

About: VDMA is a other organization based out in Frankfurt am Main, Germany. It is known for research contribution in the topics: Automation & Agriculture. The organization has 21 authors who have published 24 publications receiving 572 citations.

Skill-based Engineering and Control on Field-Device-Level with OPC UA

Abstract: The configuration of current automated production systems is complex and therefore time consuming while the market demands an easy setup and adaptability due to smaller batch sizes and volatile markets. While there are different concepts in research on how to simplify the engineering process by using generic skills or capabilities of devices, run-time control is still achieved with proprietary communication protocols and commands. The concept in this paper uses skills not only in the phase of engineering but also consequently for direct and generic control of field-devices. An executable skill-metamodel therefore describes the methodological functionality which is implemented by using OPC UA due to its vendor independence as well as built-in services and information model. The implementation uses client/server-based OPC UA and the pub/sub pattern to prepare for a deterministic real-time control in conjunction with TSN, which is required by industrial automation.

The Immigrant-Native Wage Gap in Germany

Abstract: Immigrant-native wage differentials are observed in many countries, so in Germany However, the available empirical literature for Germany defined the groups in consideration, immigrants and natives, by citizenship This limits the explanatory power of the estimates since citizenship distinguishes foreigners and German nationals, but assigns naturalised immigrants (including the large group of ethnic Germans) to the latter group Providing a more adequate definition based on the concept of origin we analyse the immigrant-native wage gap Based on data from the German Socio-Economic Panel Study,we decompose the wage gap between native Germans, foreigners, and naturalised immigrants, and consider further subgroups in the analysis In the literature, time of residence has been proven to be a relevant determinant of immigrants’ wages For the natives, time of residence is perfectly collinear with age, and unequal sets of variables have to be consideredWe therefore suggest an extension of the Oaxaca-Blinder decomposition technique Our results show a substantial gap in earnings for all immigrants’ groups compared to natives Discarding immigrants who completed education abroad reduces much of the immigrants’ wage gap Hence, educational attainment in Germany is an important component of economic integration of immigrants, and degrees obtained abroad are valued less

Vertical Integration via Dynamic Aggregation of Information in OPC UA

Abstract: Vertical and horizontal integration of manufacturing systems is an important part of the Industry 4.0 concept.

Auswirkungen der Rekuperation auf die Fahrdynamik

Abstract: Hybrid- und Elektrofahrzeuge koennen dank des regeneratorischen Betriebs des Elektromotors die kinetische Energie des Fahrzeugs beim Bremsen zurueckgewinnen. Diese Moeglichkeit bietet bei optimaler Ausnutzung grosses Potenzial zur Kraftstoffeinsparung, erfordert aber in Abhaengigkeit vom Antriebskonzept eine Abweichung von der konventionellen Bremskraftverteilung und hat somit Einfluss auf die Fahrzeugbewegung und die Fahrstabilitaet. Das Institut fuer Fahrzeugtechnik der TU Braunschweig hat in einem gemeinsamen Forschungsprojekt mit der Forschungsvereinigung Automobiltechnik e.V. (FAT) sowie der Bundesanstalt fuer Strassenwesen (BASt) die fahrdynamischen Auswirkungen der Rekuperation in einer Simulationsstudie analysiert. Die Rekuperation kann auch bei Fahrzeugen mit Einachsantrieben und der damit verbundenen Ueberbremsung der angetriebenen Achse sinnvoll und ueber einen weiteren Bereich der Fahrsituationen eingesetzt werden. Grundsaetzlich bietet die Rekuperation an der Vorderachse ein hoeheres Potenzial, da aufgrund der Achslastverlagerung deutlich mehr Bremskraft an der Vorderachse uebertragen werden kann. Dies gilt insbesondere fuer frontlastige Fahrzeuge. Darueber hinaus vermindert die Rekuperation an der Vorderachse die Gierreaktion des Fahrzeugs und verbessert somit die Fahrstabilitaet bei hohen Querbeschleunigungen und grossen Kurvenradien. Bei der Auslegung der Rekuperationsstrategie von Fahrzeugen mit Heckantrieb sollten neben der Fahrstabilitaet auch die Wahrnehmbarkeitsschwellen des Fahrers beruecksichtigt werden, da es bereits vor Erreichen der Grenze der Fahrstabilitaet zu wahrnehmbaren Aenderungen im Fahrverhalten kommen kann. (A)