@article{KallweitSchimpf2003, author = {Kallweit, Stephan and Schimpf, Axel}, title = {Photogrammetric Particle Image Velocimetry / Schimpf, Axel ; Kallweit, Stephan}, series = {Particle image velocimetry : recent improvements; proceedings of the Europiv 2 Workshop held in Zaragoza, Spain, March 31 - April 1, 2003 / edited by M. Stanislas ...}, journal = {Particle image velocimetry : recent improvements; proceedings of the Europiv 2 Workshop held in Zaragoza, Spain, March 31 - April 1, 2003 / edited by M. Stanislas ...}, publisher = {Springer}, address = {Berlin}, isbn = {3-540-21423-2}, pages = {295}, year = {2003}, language = {en} } @article{KallweitKaminskyRossietal.2008, author = {Kallweit, Stephan and Kaminsky, Radoslav and Rossi, Massimiliano and Morbiducci, Umberto}, title = {PIV Measurements of Flows in Artificial Heart Valves / Kaminsky, Radoslav ; Kallweit, Stephan ; Rossi, Massimiliano ; Morbiducci, Umberto ; Scalise, Lorenzo}, series = {Particle Image Velocimetry - New Developments and Recent Applications}, journal = {Particle Image Velocimetry - New Developments and Recent Applications}, isbn = {978-3-540-73528-1}, pages = {55 -- 72}, year = {2008}, language = {en} } @article{KallweitKaminskyRossietal.2005, author = {Kallweit, Stephan and Kaminsky, R. and Rossi, M. and Scalise, L.}, title = {PIV Measurements with high temporal Resolution behind Artificial Heart Valves / Kaminsky, R. ; Rossi, M. ; Scalise, L. ; Kallweit, S. ; Verdonck, P.}, series = {Proceedings of the 6th International Symposium on Particle Image Velocimetry}, journal = {Proceedings of the 6th International Symposium on Particle Image Velocimetry}, publisher = {Caltech}, address = {Pasadena, CA}, year = {2005}, language = {en} } @article{KallweitKaminskyRossietal.2005, author = {Kallweit, Stephan and Kaminsky, R. and Rossi, M. and Morbiducci, U.}, title = {Time resolved PIV technique for high temporal resolution measurements of prosthetic heart valves fluid dynamics / Kaminsky, R. ; Rossi, M. ; Morbiducci, U. ; Scalise, L. ; Catellini, P. ; Kallweit, S. ; Verdonck, P. ; Grigioni, M.}, series = {The International Journal of Artificial Organs. 28 (2005), H. 9}, journal = {The International Journal of Artificial Organs. 28 (2005), H. 9}, isbn = {1724-6040}, pages = {946}, year = {2005}, language = {en} } @article{KallweitKaminskyRossietal.2005, author = {Kallweit, Stephan and Kaminsky, R. and Rossi, M. and Morbiducci, U.}, title = {2D PIV Study of the flow downstream : Two prototypes of a ney monoleaflet artificial aortic heart valve prosthesis / Kaminsky, R. ; Kramm, K. ; Weber, H. J. ; Simons, A. P. ; Kallweit, S. ; Verdonck, P. R.}, series = {The International Journal of Artificial Organs. 28 (2005), H. 9}, journal = {The International Journal of Artificial Organs. 28 (2005), H. 9}, isbn = {1724-6040}, pages = {921}, year = {2005}, language = {en} } @article{KallweitKaminskyRossietal.2005, author = {Kallweit, Stephan and Kaminsky, R. and Rossi, M. and Morbiducci, U.}, title = {3D PIV measurements of prosthetic heart valve dynamics / Kaminsky, R. ; Rossi, M. ; Morbiducci, U. ; Scalise, L. ; Castellini, P. ; Kallweit, S. ; Verdonck, P. ; Grigioni, M.}, series = {The International Journal of Artificial Organs. 28 (2005), H. 9}, journal = {The International Journal of Artificial Organs. 28 (2005), H. 9}, isbn = {1724-6040}, pages = {868}, year = {2005}, language = {en} } @article{KallweitHelbingOrglmeisteretal.1994, author = {Kallweit, Stephan and Helbing, M. and Orglmeister, R. and Siekmann, H. E.}, title = {Image Processing Techniques with Neural Networks for Flow Visualization in Rotating Machinery / Helbing, M. ; Orgimeiste, R. [Orglmeister, R.] ; Kallweit, S. ; Siekmann, H. E. ; Dues, M. ; Cronemeyer, J.}, series = {FLUCOME '94 : the 4th Triennial International Symposium on Fluid Control, Measurement and Visualization; August 29 - September 1, 1994, Toulouse, France, International Congress Centre, DIGORA-Lab{\`e}ge / CERT/ONERA. General chairman Patrick Hebrard}, journal = {FLUCOME '94 : the 4th Triennial International Symposium on Fluid Control, Measurement and Visualization; August 29 - September 1, 1994, Toulouse, France, International Congress Centre, DIGORA-Lab{\`e}ge / CERT/ONERA. General chairman Patrick Hebrard}, address = {Toulouse}, pages = {87 -- 94}, year = {1994}, language = {en} } @incollection{KallweitGottschalkWalenta2016, author = {Kallweit, Stephan and Gottschalk, Michael and Walenta, Robert}, title = {ROS based safety concept for collaborative robots in industrial applications}, series = {Advances in robot design and intelligent control : proceedings of the 24th International Conference on Robotics in Alpe-Adria-Danube Region (RAAD). (Advances in intelligent systems and computing ; 371)}, booktitle = {Advances in robot design and intelligent control : proceedings of the 24th International Conference on Robotics in Alpe-Adria-Danube Region (RAAD). (Advances in intelligent systems and computing ; 371)}, publisher = {Springer}, address = {Cham}, organization = {International Conference on Robotics in Alpe-Adria-Danube Region <24, 2015, Bucharest>}, isbn = {978-3-319-21289-0 (Print) ; 978-3-319-21290-6 (E-Book)}, doi = {10.1007/978-3-319-21290-6_3}, pages = {27 -- 35}, year = {2016}, abstract = {The production and assembly of customized products increases the demand for flexible automation systems. One approach is to remove the safety fences that separate human and industrial robot to combine their skills. This collaboration possesses a certain risk for the human co-worker, leading to numerous safety concepts to protect him. The human needs to be monitored and tracked by a safety system using different sensors. The proposed system consists of a RGBD camera for surveillance of the common working area, an array of optical distance sensors to compensate shadowing effects of the RGBD camera and a laser range finder to detect the co-worker when approaching the work cell. The software for collision detection, path planning, robot control and predicting the behaviour of the co-worker is based on the Robot Operating System (ROS). A first prototype of the work cell shows that with advanced algorithms from the field of mobile robotics a very flexible safety concept can be realized: the robot not simply stops its movement when detecting a collision, but plans and executes an alternative path around the obstacle.}, language = {en} } @article{KallweitDuesSiekmann1994, author = {Kallweit, Stephan and Dues, M. W. and Siekmann, H. E.}, title = {Spectral Analysis of Pressure Fluctuations and Velocity Fields as Investigated on Propeller Pumps / Dues, M. W. ; Kallweit, S. D. ; Siekmann, H. E.}, series = {Preprints : Fifth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-5) : May 8 - 11, 1994, Maui Marriott Hotel, Kaanapali, Maui, Hawaii, U.S.A / sponsored by Pacific Center of Thermal-Fluids Engineering. [W.-J. Yang, chairman] / Vol. B.}, journal = {Preprints : Fifth International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-5) : May 8 - 11, 1994, Maui Marriott Hotel, Kaanapali, Maui, Hawaii, U.S.A / sponsored by Pacific Center of Thermal-Fluids Engineering. [W.-J. Yang, chairman] / Vol. B.}, pages = {98 -- 112}, year = {1994}, language = {en} } @article{KallweitDuesSiekmann1994, author = {Kallweit, Stephan and Dues, M. and Siekmann, H.}, title = {Particle-Image-Velocimetry (PIV) in rotierenden Maschinen / Dues, M. ; Kallweit, S. ; Siekmann, H.}, series = {Lasermethoden in der Str{\"o}mungsmesstechnik, 3. Fachtagung der Deutschen Gesellschaft f{\"u}r Laser-Anemometrie (GALA), Bremen, DE, 5.-7. Sep, 1994}, journal = {Lasermethoden in der Str{\"o}mungsmesstechnik, 3. Fachtagung der Deutschen Gesellschaft f{\"u}r Laser-Anemometrie (GALA), Bremen, DE, 5.-7. Sep, 1994}, publisher = {Shaker}, address = {Aachen}, isbn = {3-8265-0162-4}, pages = {19.1 -- 19-5}, year = {1994}, language = {en} } @article{HoetterFateriGebhardt2012, author = {H{\"o}tter, Jan-Steffen and Fateri, Miranda and Gebhardt, Andreas}, title = {Selective laser melting of metals: desktop machines open up new chances even for small companies}, series = {Advanced materials research}, volume = {622-623}, journal = {Advanced materials research}, publisher = {Trans Tech Publ.}, address = {Baech}, issn = {1662-8985 (E-Journal); 1022-6680 (Print)}, doi = {10.4028/www.scientific.net/AMR.622-623.461}, pages = {461 -- 465}, year = {2012}, abstract = {Additive manufacturing (AM) of metal parts by using Selective Laser Melting (SLM) has become a powerful tool mostly in the area of automotive, aerospace engineering and others. Especially in the field of dentistry, jewelry and related branches that require individualized or even one-of-a-kind products, the direct digital manufacturing process opens up new ways of design and manufacturing. In these fields, mostly small and medium sized businesses (SME) are operating which do not have sufficient human and economic resources to invest in this technology. But to stay competitive, the application of AM can be regarded as a necessity. In this situation a new desktop machine (Realizer SLM 50) was introduced that cost about 1/3 of a shop floor SLM machine and promises small quality parts. To find out whether the machine really is an alternative for SMEs the University of Applied Science, Aachen, Germany, designed, build and optimized typical parts from the dentistry and the jewelry branches using CoCr and silver material, the latter being new with this application. The paper describes the SLM procedure and how to find and optimize the most important parameters. The test is accompanied by digital simulation in order to verify the build parameters and to plan future builds. The procedure is shown as well as the resulting parts made from CoCr and silver material.}, language = {en} } @inproceedings{HuberBleckScheiketal.2011, author = {Huber, Fr{\´e}d{\´e}ric and Bleck, Wolfgang and Scheik, Sven and Schleser, Markus and Reisgen, Uwe}, title = {Investigation of galvanneal coating adherence in adhesive bonded joints using lap shear test}, series = {Galvatech 2011 : 8th International Conference on Zinc and Zinc Alloy Coated Steel Sheet, June 21 - 24, 2011, Genova (Italy) ; proceedings}, booktitle = {Galvatech 2011 : 8th International Conference on Zinc and Zinc Alloy Coated Steel Sheet, June 21 - 24, 2011, Genova (Italy) ; proceedings}, publisher = {Associazione Italiana di Metallurgia}, address = {Mailand}, organization = {International Conference on Zinc and Zinc Alloy Coated Steel Sheet <8, 2011, Genua>}, isbn = {978-88-85298-82-8}, pages = {Paper No. 43}, year = {2011}, language = {en} } @article{HeinrichsWeck1981, author = {Heinrichs, Horst and Weck, H.}, title = {Efficient finite-element structural analysis by interactive graphic mesh generation}, series = {CIRP Annals. 30 (1981), H. 1}, journal = {CIRP Annals. 30 (1981), H. 1}, pages = {279 -- 284}, year = {1981}, language = {en} } @article{HaselgruberMautnerThiele2010, author = {Haselgruber, Nikolaus and Mautner, Karin and Thiele, Jan}, title = {Usage Space Analysis for Reliability Testing}, series = {Quality and Reliability Engineering International}, volume = {26}, journal = {Quality and Reliability Engineering International}, number = {8}, publisher = {Wiley}, address = {New York}, issn = {1099-1638}, doi = {10.1002/qre.1155}, pages = {877 -- 885}, year = {2010}, abstract = {During the development process of a complex technical product, one widely used and important technique is accelerated testing where the applied stress on a component is chosen to exceed the reference stress, i.e. the stress encountered in field operation, in order to reduce the time to failure. For that, the reference stress has to be known. Since a complex technical product may fail regarding numerous failure modes, stress in general is highly dimensional rather than scalar. In addition, customers use their products individually, i.e. field operation should be described by a distribution rather than by one scalar stress value. In this paper, a way to span the customer usage space is shown. It allows the identification of worst case reference stress profiles in significantly reduced dimensions with minimal loss of information. The application example shows that even for a complex product like a combustion engine, stress information can be compressed significantly. With low measurement effort it turned out that only three reference stress cycles were sufficient to cover a broad range of customer stress variety.}, language = {en} } @inproceedings{HartmannKallweitFeldusenetal.2012, author = {Hartmann, Axel and Kallweit, Stephan and Feldusen, Antje and Schr{\"o}der, Wolfgang}, title = {Detection of upstream propagating sound waves at buffet flow using high-speed PIV}, pages = {14 S. : graph. Darst.}, year = {2012}, language = {en} } @article{HanrathPlesken1985, author = {Hanrath, Wilhelm and Plesken, Wilhelm}, title = {Group rings and irreducible representations of space groups / by W. Hanrath and W. Plesken}, series = {Journal f{\"u}r die reine und angewandte Mathematik. 362 (1985)}, journal = {Journal f{\"u}r die reine und angewandte Mathematik. 362 (1985)}, isbn = {0075-4102}, pages = {130 -- 140}, year = {1985}, language = {en} } @article{HanrathPlesken1984, author = {Hanrath, Wilhelm and Plesken, Wilhelm}, title = {The lattices of six-dimensional euclidean space}, series = {Mathematics of computation. 43 (1984), H. 168}, journal = {Mathematics of computation. 43 (1984), H. 168}, isbn = {0025-5718}, pages = {573 -- 587}, year = {1984}, language = {en} } @article{Hanrath1989, author = {Hanrath, Wilhelm}, title = {Character tables of some factor groups of space groups}, series = {Perfect groups / Derek F. Holt and W. Plesken}, journal = {Perfect groups / Derek F. Holt and W. Plesken}, publisher = {Clarendon Press}, address = {Oxford}, isbn = {0-19-853559-7}, pages = {357 -- 359}, year = {1989}, language = {en} } @article{HaagZontarSchleupenetal.2014, author = {Haag, S. and Zontar, D. and Schleupen, Josef and M{\"u}ller, T. and Brecher, C.}, title = {Chain of refined perception in self-optimizing assembly of micro-optical systems}, series = {Journal of sensors and sensor systems}, volume = {3}, journal = {Journal of sensors and sensor systems}, number = {1}, publisher = {Copernicus Publ.}, address = {G{\"o}ttingen}, issn = {2194-878X}, doi = {10.5194/jsss-3-87-2014}, pages = {87 -- 95}, year = {2014}, abstract = {Today, the assembly of laser systems requires a large share of manual operations due to its complexity regarding the optimal alignment of optics. Although the feasibility of automated alignment of laser optics has been shown in research labs, the development effort for the automation of assembly does not meet economic requirements - especially for low-volume laser production. This paper presents a model-based and sensor-integrated assembly execution approach for flexible assembly cells consisting of a macro-positioner covering a large workspace and a compact micromanipulator with camera attached to the positioner. In order to make full use of available models from computer-aided design (CAD) and optical simulation, sensor systems at different levels of accuracy are used for matching perceived information with model data. This approach is named "chain of refined perception", and it allows for automated planning of complex assembly tasks along all major phases of assembly such as collision-free path planning, part feeding, and active and passive alignment. The focus of the paper is put on the in-process image-based metrology and information extraction used for identifying and calibrating local coordinate systems as well as the exploitation of that information for a part feeding process for micro-optics. Results will be presented regarding the processes of automated calibration of the robot camera as well as the local coordinate systems of part feeding area and robot base.}, language = {en} } @inproceedings{GoettscheHinschWittwer1992, author = {G{\"o}ttsche, Joachim and Hinsch, Andreas and Wittwer, Volker}, title = {Electrochromic and optical properties of mixed WO3-TiO2 thin films produced by sputtering and the sol-gel technique}, series = {Optical materials technology for energy efficiency and solar energy conversion XI: chromogenics for smart windows : 19 and 21 May 1992, Toulouse-Lab{\`e}ge. (SPIE proceedings series. 1728)}, booktitle = {Optical materials technology for energy efficiency and solar energy conversion XI: chromogenics for smart windows : 19 and 21 May 1992, Toulouse-Lab{\`e}ge. (SPIE proceedings series. 1728)}, editor = {Hugo-Le Goff, Anne}, publisher = {SPIE}, address = {Bellingham, Wash.}, isbn = {0-8194-0901-4}, pages = {13 -- 25}, year = {1992}, language = {en} }