Browsing by Author "Müller, Matthias"

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Open Access
Intelligent lightweight structures for hybrid machine tools
(2020) Möhring, H. -Christian; Müller, Matthias; Krieger, Jens; Multhoff, Jörg; Plagge, Christian; de Wit, Jesper; Misch, Sandra
In order to improve the competitiveness on the global machine tool markets, a permanent development of new solutions and optimization of existing technologies is necessary. Besides traditional business areas, like Europe, Asia and the US, emerging countries provide interesting potential. Currently, the setup and operation of precise machine tools in these areas possesses some challenges. As an example, the foundation of the machines is often not as stable as assumed during the layout and design phase. Furthermore, the thermal boundary conditions are often characterized by much higher differences of the ambient temperature during the daily operational time compared to European conditions. These influences affect especially the performance of medium sized machine tools. Within the joint project HYBRIDi, funded by the Federal Ministry of Education and Research (BMBF) supported by the Projektträger Karlsruhe (PTKA), partners from industry and research created, realized and investigated new intelligent lightweight machine slide structures in order to overcome the named challenges. In particular, two variants of a hybrid material z-slide (RAM) with integrated sensors were built and analyzed with respect to advantages in terms of mass reduction, static and dynamic stiffness, dynamic positioning accuracy as well as thermal behavior. This paper presents the developments and results of the project.
Open Access
Weltrekorde durch Metacomputing
(1997) Müller, Matthias
Die Leistungsmerkmale von Supercomputern wie Rechengeschwindigkeit, Hauptspeicherausbau und Datentransfergeschwindigkeit werden beständig verbessert. Ein Zeichen für diese Entwicklung sind die immer größeren Probleme, die man mit diesen Rechnern behandeln kann, wie es sich unter anderem in der Entwicklung von Weltrekorden zeigt. Bisher waren diese Weltrekorde im wesentlichen Ausdruck der Leistungsfähigkeit der zu diesem Zeitpunkt größten Computer. Heute versucht man darüberhinaus, die Rechenleistung noch weiter zu steigern, indem man solche Supercomputer zu Metacomputern verbindet. Das Höchstleistungsrechenzentrum der Universität Stuttgart (HLRS) kooperiert in diesem Zusammenhang mit den Sandia National Laboratories (SNL) und dem Supercomputing Center in Pittsburgh (PSC).