--- _id: '18279' abstract: - lang: eng text: 'For $c in REAL$, a $c$-spanner is a subgraph of a complete Euclidean graph satisfying that between any two vertices there exists a path of weighted length at most $c$ times their geometric distance. Based on this property to approximate a complete weighted graph, sparse spanners have found many applications, e.g., in FPTAS, geometric searching, and radio networks. For geometric searching, it turned out to suffice whether the radius rather than the length of some path between any two vertices is bounded relatively to their geometric distance; this is the defining property of weak spanners. Finally regarding radio network applications, a power spanner accounts for the total energy afforded for a wireless transmission with the requirement that the sum of the squares of the lengths of some path between any two planar vertices must be bounded relatively to the square of their geometric distance (or higher powers up to 6 or even 8).

While it is known that any $c$-spanner is also both a weak $C_1$-spanner and a $C_2$-power spanner (for appropriate $C_1,C_2$ depending only on $c$ but not on the graph under consideration), we show that the converse fails: There exists a family of $c_1$-power spanners that are no weak $C$-spanners and also a family of weak $c_2$-spanners that are no $C$-spanners for any fixed $C$ (and thus no uniform spanners, either). However the deepest result of the present work reveals that, surprisingly, any weak spanner is also a uniform power spanner. We further generalize the latter notion by considering $(c,delta)$-power spanners where the sum of the $delta$-th powers of the lengths has to be bounded; so $(cdot,2)$-power spanners coincide with the usual power spanners and $(cdot,1)$-power spanners are classical spanners. Interestingly, these $(cdot,delta)$-power spanners form a strict hierarchy where the above results still hold for any $deltageq2$; some even hold for $delta>1$ while counterexamples reveal others to fail for $delta<2$. In fact we show that in general every self-similar curve of fractal dimension $d>delta$ is no $(C,delta)$-power spanner for any fixed $C$. ' author: - first_name: Christian full_name: Schindelhauer, Christian last_name: Schindelhauer - first_name: Klaus full_name: Volbert, Klaus last_name: Volbert - first_name: Martin full_name: Ziegler, Martin last_name: Ziegler citation: ama: 'Schindelhauer C, Volbert K, Ziegler M. Spanners, Weak Spanners, and Power Spanners for Wireless Networks. In: Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC’04). Vol 3341. Berlin, Heidelberg: Springer ; 2004:805-821. doi:10.1007/978-3-540-30551-4_69' apa: 'Schindelhauer, C., Volbert, K., & Ziegler, M. (2004). Spanners, Weak Spanners, and Power Spanners for Wireless Networks. In Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC’04) (Vol. 3341, pp. 805–821). Berlin, Heidelberg: Springer . https://doi.org/10.1007/978-3-540-30551-4_69' bibtex: '@inproceedings{Schindelhauer_Volbert_Ziegler_2004, place={Berlin, Heidelberg}, title={Spanners, Weak Spanners, and Power Spanners for Wireless Networks}, volume={3341}, DOI={10.1007/978-3-540-30551-4_69}, booktitle={Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC’04)}, publisher={Springer }, author={Schindelhauer, Christian and Volbert, Klaus and Ziegler, Martin}, year={2004}, pages={805–821} }' chicago: 'Schindelhauer, Christian, Klaus Volbert, and Martin Ziegler. “Spanners, Weak Spanners, and Power Spanners for Wireless Networks.” In Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC’04), 3341:805–21. Berlin, Heidelberg: Springer , 2004. https://doi.org/10.1007/978-3-540-30551-4_69.' ieee: C. Schindelhauer, K. Volbert, and M. Ziegler, “Spanners, Weak Spanners, and Power Spanners for Wireless Networks,” in Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC’04), 2004, vol. 3341, pp. 805–821. mla: Schindelhauer, Christian, et al. “Spanners, Weak Spanners, and Power Spanners for Wireless Networks.” Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC’04), vol. 3341, Springer , 2004, pp. 805–21, doi:10.1007/978-3-540-30551-4_69. short: 'C. Schindelhauer, K. Volbert, M. Ziegler, in: Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC’04), Springer , Berlin, Heidelberg, 2004, pp. 805–821.' date_created: 2020-08-25T12:30:19Z date_updated: 2022-01-06T06:53:28Z department: - _id: '63' doi: 10.1007/978-3-540-30551-4_69 intvolume: ' 3341' language: - iso: eng page: 805-821 place: Berlin, Heidelberg publication: Proc. of 15th Annual International Symposium on Algorithms and Computation (ISAAC'04) publication_identifier: isbn: - '9783540241317' - '9783540305514' issn: - 0302-9743 - 1611-3349 publication_status: published publisher: 'Springer ' status: public title: Spanners, Weak Spanners, and Power Spanners for Wireless Networks type: conference user_id: '15415' volume: 3341 year: '2004' ... --- _id: '18364' abstract: - lang: eng text: "The visualisation of manufacturing-processes assists the user in understanding and analysis.\r\nTypically he can move free and unguided in a virtual environment which visualizes the entire\r\nprocess. Thus knowledge and conclusions are to some extend acquired on a random base.\r\nThis article describes the development of a tool, which enables the user to interactively improve\r\nsignificant production processes in the simulation. He moves in a virtual 3D-environment\r\n(walkthrough system) and is able to acquire automatically calculated indications for significant\r\nprocesses. At the same time the simulation considers significant objects in a more detailed way. If\r\nthe viewer is interested in a significant process, he is automatically guided to the relevant location\r\nwhere he can examine the critical situation by modification of the simulation model." author: - first_name: Bengt full_name: Mueck, Bengt last_name: Mueck - first_name: Wilhelm full_name: Dangelmaier, Wilhelm last_name: Dangelmaier - first_name: 'Christoph ' full_name: 'Laroque, Christoph ' last_name: Laroque - first_name: Matthias full_name: Fischer, Matthias id: '146' last_name: Fischer - first_name: Michael full_name: Kortenjan, Michael last_name: Kortenjan citation: ama: 'Mueck B, Dangelmaier W, Laroque C, Fischer M, Kortenjan M. Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations. In: Simulation and Visualisation 2004. Magdeburg: SCS European Publishing House; 2004:73-83.' apa: 'Mueck, B., Dangelmaier, W., Laroque, C., Fischer, M., & Kortenjan, M. (2004). Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations. In Simulation and Visualisation 2004 (pp. 73–83). Magdeburg: SCS European Publishing House.' bibtex: '@inproceedings{Mueck_Dangelmaier_Laroque_Fischer_Kortenjan_2004, place={Magdeburg}, title={Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations}, booktitle={Simulation and Visualisation 2004}, publisher={SCS European Publishing House}, author={Mueck, Bengt and Dangelmaier, Wilhelm and Laroque, Christoph and Fischer, Matthias and Kortenjan, Michael}, year={2004}, pages={73–83} }' chicago: 'Mueck, Bengt, Wilhelm Dangelmaier, Christoph Laroque, Matthias Fischer, and Michael Kortenjan. “Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations.” In Simulation and Visualisation 2004, 73–83. Magdeburg: SCS European Publishing House, 2004.' ieee: B. Mueck, W. Dangelmaier, C. Laroque, M. Fischer, and M. Kortenjan, “Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations,” in Simulation and Visualisation 2004, 2004, pp. 73–83. mla: Mueck, Bengt, et al. “Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations.” Simulation and Visualisation 2004, SCS European Publishing House, 2004, pp. 73–83. short: 'B. Mueck, W. Dangelmaier, C. Laroque, M. Fischer, M. Kortenjan, in: Simulation and Visualisation 2004, SCS European Publishing House, Magdeburg, 2004, pp. 73–83.' date_created: 2020-08-26T12:29:21Z date_updated: 2022-01-06T06:53:30Z ddc: - '000' department: - _id: '63' file: - access_level: closed content_type: application/pdf creator: koala date_created: 2020-08-26T12:29:05Z date_updated: 2020-08-26T12:29:05Z file_id: '18365' file_name: hni-id-1642.pdf file_size: 1767621 relation: main_file success: 1 file_date_updated: 2020-08-26T12:29:05Z has_accepted_license: '1' language: - iso: eng page: 73-83 place: Magdeburg publication: Simulation and Visualisation 2004 publisher: SCS European Publishing House status: public title: Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations type: conference user_id: '15415' year: '2004' ... --- _id: '18447' author: - first_name: Brigitte full_name: Oesterdiekhoff, Brigitte last_name: Oesterdiekhoff citation: ama: Oesterdiekhoff B. Transcoding von Webinhalten. Informatik Spektrum. 2004;27(5):448-452. apa: Oesterdiekhoff, B. (2004). Transcoding von Webinhalten. Informatik Spektrum, 27(5), 448–452. bibtex: '@article{Oesterdiekhoff_2004, title={Transcoding von Webinhalten}, volume={27}, number={5}, journal={Informatik Spektrum}, author={Oesterdiekhoff, Brigitte}, year={2004}, pages={448–452} }' chicago: 'Oesterdiekhoff, Brigitte. “Transcoding von Webinhalten.” Informatik Spektrum 27, no. 5 (2004): 448–52.' ieee: B. Oesterdiekhoff, “Transcoding von Webinhalten,” Informatik Spektrum, vol. 27, no. 5, pp. 448–452, 2004. mla: Oesterdiekhoff, Brigitte. “Transcoding von Webinhalten.” Informatik Spektrum, vol. 27, no. 5, 2004, pp. 448–52. short: B. Oesterdiekhoff, Informatik Spektrum 27 (2004) 448–452. date_created: 2020-08-27T11:52:37Z date_updated: 2022-01-06T06:53:32Z department: - _id: '63' intvolume: ' 27' issue: '5' language: - iso: eng page: 448-452 publication: Informatik Spektrum status: public title: Transcoding von Webinhalten type: journal_article user_id: '15415' volume: 27 year: '2004' ... --- _id: '18448' author: - first_name: Brigitte full_name: Oesterdiekhoff, Brigitte last_name: Oesterdiekhoff citation: ama: 'Oesterdiekhoff B. Internet Premium Services for Flexible Format Distributed Devices. In: Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES’04). ; 2004.' apa: Oesterdiekhoff, B. (2004). Internet Premium Services for Flexible Format Distributed Devices. In Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES’04). bibtex: '@inproceedings{Oesterdiekhoff_2004, title={Internet Premium Services for Flexible Format Distributed Devices}, booktitle={Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES’04)}, author={Oesterdiekhoff, Brigitte}, year={2004} }' chicago: Oesterdiekhoff, Brigitte. “Internet Premium Services for Flexible Format Distributed Devices.” In Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES’04), 2004. ieee: B. Oesterdiekhoff, “Internet Premium Services for Flexible Format Distributed Devices,” in Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES’04), 2004. mla: Oesterdiekhoff, Brigitte. “Internet Premium Services for Flexible Format Distributed Devices.” Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES’04), 2004. short: 'B. Oesterdiekhoff, in: Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES’04), 2004.' date_created: 2020-08-27T11:58:50Z date_updated: 2022-01-06T06:53:32Z department: - _id: '63' language: - iso: eng publication: Proceedings of IFIP Working Conference on Distributed and Parallel Embedded Systems (DIPES'04) status: public title: Internet Premium Services for Flexible Format Distributed Devices type: conference user_id: '15415' year: '2004' ... --- _id: '22325' author: - first_name: Ralf full_name: Kretschmer, Ralf last_name: Kretschmer - first_name: Vera full_name: Denzer, Vera last_name: Denzer - first_name: Detmar full_name: Zimmer, Detmar id: '604' last_name: Zimmer citation: ama: Kretschmer R, Denzer V, Zimmer D. Bereichsübergreifendes Toleranzmanagement. Damit es rund läuft. QZ - Qualität und Zuverlässigkeit . 2004;49(11):38-41. apa: Kretschmer, R., Denzer, V., & Zimmer, D. (2004). Bereichsübergreifendes Toleranzmanagement. Damit es rund läuft. QZ - Qualität Und Zuverlässigkeit , 49(11), 38–41. bibtex: '@article{Kretschmer_Denzer_Zimmer_2004, title={Bereichsübergreifendes Toleranzmanagement. Damit es rund läuft}, volume={49}, number={11}, journal={QZ - Qualität und Zuverlässigkeit }, publisher={Deutsche Gesellschaft für Qualität e.V. (DGQ)}, author={Kretschmer, Ralf and Denzer, Vera and Zimmer, Detmar}, year={2004}, pages={38–41} }' chicago: 'Kretschmer, Ralf, Vera Denzer, and Detmar Zimmer. “Bereichsübergreifendes Toleranzmanagement. Damit Es Rund Läuft.” QZ - Qualität Und Zuverlässigkeit 49, no. 11 (2004): 38–41.' ieee: R. Kretschmer, V. Denzer, and D. Zimmer, “Bereichsübergreifendes Toleranzmanagement. Damit es rund läuft,” QZ - Qualität und Zuverlässigkeit , vol. 49, no. 11, pp. 38–41, 2004. mla: Kretschmer, Ralf, et al. “Bereichsübergreifendes Toleranzmanagement. Damit Es Rund Läuft.” QZ - Qualität Und Zuverlässigkeit , vol. 49, no. 11, Deutsche Gesellschaft für Qualität e.V. (DGQ), 2004, pp. 38–41. short: R. Kretschmer, V. Denzer, D. Zimmer, QZ - Qualität Und Zuverlässigkeit 49 (2004) 38–41. date_created: 2021-06-15T11:07:59Z date_updated: 2022-01-06T06:55:31Z department: - _id: '9' - _id: '146' intvolume: ' 49' issue: '11' language: - iso: eng page: 38-41 publication: 'QZ - Qualität und Zuverlässigkeit ' publisher: Deutsche Gesellschaft für Qualität e.V. (DGQ) status: public title: Bereichsübergreifendes Toleranzmanagement. Damit es rund läuft type: journal_article user_id: '38077' volume: 49 year: '2004' ... --- _id: '23332' author: - first_name: Isabel full_name: Koke, Isabel last_name: Koke - first_name: Herbert full_name: Funke, Herbert last_name: Funke - first_name: Ferdinand full_name: Ferber, Ferdinand last_name: Ferber citation: ama: Koke I, Funke H, Ferber F. Faserverbundwerkstoffe - experimentelle Bestimmung mechanischer Kenngrößen. Posterbeitrag AG Composite. 2004. apa: Koke, I., Funke, H., & Ferber, F. (2004). Faserverbundwerkstoffe - experimentelle Bestimmung mechanischer Kenngrößen. Posterbeitrag AG Composite. bibtex: '@article{Koke_Funke_Ferber_2004, title={Faserverbundwerkstoffe - experimentelle Bestimmung mechanischer Kenngrößen}, journal={Posterbeitrag AG Composite}, author={Koke, Isabel and Funke, Herbert and Ferber, Ferdinand}, year={2004} }' chicago: Koke, Isabel, Herbert Funke, and Ferdinand Ferber. “Faserverbundwerkstoffe - Experimentelle Bestimmung Mechanischer Kenngrößen.” Posterbeitrag AG Composite, 2004. ieee: I. Koke, H. Funke, and F. Ferber, “Faserverbundwerkstoffe - experimentelle Bestimmung mechanischer Kenngrößen,” Posterbeitrag AG Composite, 2004. mla: Koke, Isabel, et al. “Faserverbundwerkstoffe - Experimentelle Bestimmung Mechanischer Kenngrößen.” Posterbeitrag AG Composite, 2004. short: I. Koke, H. Funke, F. Ferber, Posterbeitrag AG Composite (2004). date_created: 2021-08-09T09:29:08Z date_updated: 2022-01-06T06:55:49Z department: - _id: '153' language: - iso: eng publication: Posterbeitrag AG Composite status: public title: Faserverbundwerkstoffe - experimentelle Bestimmung mechanischer Kenngrößen type: journal_article user_id: '24876' year: '2004' ... --- _id: '23333' author: - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler citation: ama: Trächtler A. Integrated Vehicle Dynamics Control Using Active Brake, Steering, and Suspension Systems. Int J Vehicle Design. 2004;36(1):1-12,. apa: Trächtler, A. (2004). Integrated Vehicle Dynamics Control Using Active Brake, Steering, and Suspension Systems. Int. J. Vehicle Design, 36(1), 1-12,. bibtex: '@article{Trächtler_2004, title={Integrated Vehicle Dynamics Control Using Active Brake, Steering, and Suspension Systems}, volume={36}, number={1}, journal={Int. J. Vehicle Design}, author={Trächtler, Ansgar}, year={2004}, pages={1-12,} }' chicago: 'Trächtler, Ansgar. “Integrated Vehicle Dynamics Control Using Active Brake, Steering, and Suspension Systems.” Int. J. Vehicle Design 36, no. 1 (2004): 1-12,.' ieee: A. Trächtler, “Integrated Vehicle Dynamics Control Using Active Brake, Steering, and Suspension Systems,” Int. J. Vehicle Design, vol. 36, no. 1, pp. 1-12, 2004. mla: Trächtler, Ansgar. “Integrated Vehicle Dynamics Control Using Active Brake, Steering, and Suspension Systems.” Int. J. Vehicle Design, vol. 36, no. 1, 2004, pp. 1-12,. short: A. Trächtler, Int. J. Vehicle Design 36 (2004) 1-12,. date_created: 2021-08-09T09:29:09Z date_updated: 2022-01-06T06:55:49Z department: - _id: '153' intvolume: ' 36' issue: '1' language: - iso: eng page: 1-12, publication: Int. J. Vehicle Design status: public title: Integrated Vehicle Dynamics Control Using Active Brake, Steering, and Suspension Systems type: journal_article user_id: '24876' volume: 36 year: '2004' ... --- _id: '23334' author: - first_name: Amos full_name: Albert, Amos last_name: Albert - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler citation: ama: Albert A, Trächtler A. Verteilte Fahrdynamikregelung mit zeitgesteuerter Architektur am Beispiel des Bosch-Konzeptes VDM. 13 Aachener Kolloquium Fahrzeug- und Motorentechnik. 2004:593-610,. apa: Albert, A., & Trächtler, A. (2004). Verteilte Fahrdynamikregelung mit zeitgesteuerter Architektur am Beispiel des Bosch-Konzeptes VDM. 13. Aachener Kolloquium Fahrzeug- Und Motorentechnik, 593-610,. bibtex: '@article{Albert_Trächtler_2004, title={Verteilte Fahrdynamikregelung mit zeitgesteuerter Architektur am Beispiel des Bosch-Konzeptes VDM}, journal={13. Aachener Kolloquium Fahrzeug- und Motorentechnik}, author={Albert, Amos and Trächtler, Ansgar}, year={2004}, pages={593-610,} }' chicago: Albert, Amos, and Ansgar Trächtler. “Verteilte Fahrdynamikregelung Mit Zeitgesteuerter Architektur Am Beispiel Des Bosch-Konzeptes VDM.” 13. Aachener Kolloquium Fahrzeug- Und Motorentechnik, 2004, 593-610,. ieee: A. Albert and A. Trächtler, “Verteilte Fahrdynamikregelung mit zeitgesteuerter Architektur am Beispiel des Bosch-Konzeptes VDM,” 13. Aachener Kolloquium Fahrzeug- und Motorentechnik, pp. 593-610, 2004. mla: Albert, Amos, and Ansgar Trächtler. “Verteilte Fahrdynamikregelung Mit Zeitgesteuerter Architektur Am Beispiel Des Bosch-Konzeptes VDM.” 13. Aachener Kolloquium Fahrzeug- Und Motorentechnik, 2004, pp. 593-610,. short: A. Albert, A. Trächtler, 13. Aachener Kolloquium Fahrzeug- Und Motorentechnik (2004) 593-610,. date_created: 2021-08-09T09:29:10Z date_updated: 2022-01-06T06:55:49Z department: - _id: '153' language: - iso: eng page: 593-610, publication: 13. Aachener Kolloquium Fahrzeug- und Motorentechnik status: public title: Verteilte Fahrdynamikregelung mit zeitgesteuerter Architektur am Beispiel des Bosch-Konzeptes VDM type: journal_article user_id: '24876' year: '2004' ... --- _id: '23335' author: - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler citation: ama: Trächtler A. Zusammenspiel von regelbaren Feder-/Dämpfersystemen mit ESP. CTI-Konferenz “Federung und Dämpfung.” 2004. apa: Trächtler, A. (2004). Zusammenspiel von regelbaren Feder-/Dämpfersystemen mit ESP. CTI-Konferenz “Federung Und Dämpfung.” bibtex: '@article{Trächtler_2004, title={Zusammenspiel von regelbaren Feder-/Dämpfersystemen mit ESP}, journal={CTI-Konferenz “Federung und Dämpfung”}, author={Trächtler, Ansgar}, year={2004} }' chicago: Trächtler, Ansgar. “Zusammenspiel von Regelbaren Feder-/Dämpfersystemen Mit ESP.” CTI-Konferenz “Federung Und Dämpfung,” 2004. ieee: A. Trächtler, “Zusammenspiel von regelbaren Feder-/Dämpfersystemen mit ESP,” CTI-Konferenz “Federung und Dämpfung,” 2004. mla: Trächtler, Ansgar. “Zusammenspiel von Regelbaren Feder-/Dämpfersystemen Mit ESP.” CTI-Konferenz “Federung Und Dämpfung,” 2004. short: A. Trächtler, CTI-Konferenz “Federung Und Dämpfung” (2004). date_created: 2021-08-09T09:29:11Z date_updated: 2022-01-06T06:55:49Z department: - _id: '153' language: - iso: eng publication: CTI-Konferenz "Federung und Dämpfung" status: public title: Zusammenspiel von regelbaren Feder-/Dämpfersystemen mit ESP type: journal_article user_id: '24876' year: '2004' ... --- _id: '23336' author: - first_name: Ansgar full_name: Trächtler, Ansgar id: '552' last_name: Trächtler citation: ama: Trächtler A. Integrierte Fahrdynamikregelung mit ESP, aktiver Lenkung und aktivem Fahrwerk. 2 VDI/VDE-Fachtagung zur Steuerung und Regelung von Fahrzeugen und Motoren AUTOREG. 2004:463-473,. apa: Trächtler, A. (2004). Integrierte Fahrdynamikregelung mit ESP, aktiver Lenkung und aktivem Fahrwerk. 2. VDI/VDE-Fachtagung Zur Steuerung Und Regelung von Fahrzeugen Und Motoren AUTOREG, 463-473,. bibtex: '@article{Trächtler_2004, title={Integrierte Fahrdynamikregelung mit ESP, aktiver Lenkung und aktivem Fahrwerk}, journal={2. VDI/VDE-Fachtagung zur Steuerung und Regelung von Fahrzeugen und Motoren AUTOREG}, author={Trächtler, Ansgar}, year={2004}, pages={463-473,} }' chicago: Trächtler, Ansgar. “Integrierte Fahrdynamikregelung Mit ESP, Aktiver Lenkung Und Aktivem Fahrwerk.” 2. VDI/VDE-Fachtagung Zur Steuerung Und Regelung von Fahrzeugen Und Motoren AUTOREG, 2004, 463-473,. ieee: A. Trächtler, “Integrierte Fahrdynamikregelung mit ESP, aktiver Lenkung und aktivem Fahrwerk,” 2. VDI/VDE-Fachtagung zur Steuerung und Regelung von Fahrzeugen und Motoren AUTOREG, pp. 463-473, 2004. mla: Trächtler, Ansgar. “Integrierte Fahrdynamikregelung Mit ESP, Aktiver Lenkung Und Aktivem Fahrwerk.” 2. VDI/VDE-Fachtagung Zur Steuerung Und Regelung von Fahrzeugen Und Motoren AUTOREG, 2004, pp. 463-473,. short: A. Trächtler, 2. VDI/VDE-Fachtagung Zur Steuerung Und Regelung von Fahrzeugen Und Motoren AUTOREG (2004) 463-473,. date_created: 2021-08-09T09:29:12Z date_updated: 2022-01-06T06:55:49Z department: - _id: '153' language: - iso: eng page: 463-473, publication: 2. VDI/VDE-Fachtagung zur Steuerung und Regelung von Fahrzeugen und Motoren AUTOREG status: public title: Integrierte Fahrdynamikregelung mit ESP, aktiver Lenkung und aktivem Fahrwerk type: journal_article user_id: '24876' year: '2004' ... --- _id: '23337' author: - first_name: Armin full_name: Verhagen, Armin last_name: Verhagen - first_name: Sylvia full_name: Futterer, Sylvia last_name: Futterer - first_name: Josef full_name: Rupprecht, Josef last_name: Rupprecht - first_name: Ansgar full_name: Trächtler, Ansgar last_name: Trächtler citation: ama: Verhagen A, Futterer S, Rupprecht J, Trächtler A. Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems. Proc FISITA. 2004. apa: Verhagen, A., Futterer, S., Rupprecht, J., & Trächtler, A. (2004). Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems. Proc. FISITA. bibtex: '@article{Verhagen_Futterer_Rupprecht_Trächtler_2004, title={Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems}, journal={Proc. FISITA}, author={Verhagen, Armin and Futterer, Sylvia and Rupprecht, Josef and Trächtler, Ansgar}, year={2004} }' chicago: Verhagen, Armin, Sylvia Futterer, Josef Rupprecht, and Ansgar Trächtler. “Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems.” Proc. FISITA, 2004. ieee: A. Verhagen, S. Futterer, J. Rupprecht, and A. Trächtler, “Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems,” Proc. FISITA, 2004. mla: Verhagen, Armin, et al. “Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems.” Proc. FISITA, 2004. short: A. Verhagen, S. Futterer, J. Rupprecht, A. Trächtler, Proc. FISITA (2004). date_created: 2021-08-09T09:29:13Z date_updated: 2022-01-06T06:55:49Z department: - _id: '153' language: - iso: eng publication: Proc. FISITA status: public title: Vehicle Dynamics Management - Benefits of Integrated Control of Active Brake, Active Steering and Active Suspension Systems type: journal_article user_id: '24876' year: '2004' ... --- _id: '21780' author: - first_name: F. full_name: Goetz, F. last_name: Goetz - first_name: B. full_name: Boenning, B. last_name: Boenning - first_name: Gitta full_name: Domik, Gitta id: '90' last_name: Domik citation: ama: 'Goetz F, Boenning B, Domik G. Mapping High Quality Textures on an Interactive Globe. In: Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing. ; 2004.' apa: Goetz, F., Boenning, B., & Domik, G. (2004). Mapping High Quality Textures on an Interactive Globe. In Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing. bibtex: '@inproceedings{Goetz_Boenning_Domik_2004, title={Mapping High Quality Textures on an Interactive Globe}, booktitle={Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing}, author={Goetz, F. and Boenning, B. and Domik, Gitta}, year={2004} }' chicago: Goetz, F., B. Boenning, and Gitta Domik. “Mapping High Quality Textures on an Interactive Globe.” In Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing, 2004. ieee: F. Goetz, B. Boenning, and G. Domik, “Mapping High Quality Textures on an Interactive Globe,” in Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing, 2004. mla: Goetz, F., et al. “Mapping High Quality Textures on an Interactive Globe.” Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing, 2004. short: 'F. Goetz, B. Boenning, G. Domik, in: Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing, 2004.' date_created: 2021-04-25T17:25:37Z date_updated: 2022-01-06T06:55:13Z department: - _id: '65' language: - iso: eng publication: Proc. of The 4th IASTED International Conference on Visualization, Imgaging, and Image Processing status: public title: Mapping High Quality Textures on an Interactive Globe type: conference user_id: '14955' year: '2004' ... --- _id: '8951' author: - first_name: Bo full_name: Fu, Bo last_name: Fu - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek citation: ama: 'Fu B, Hemsel T, Wallaschek J. Model-based Diagnosis for Sandwiched Ultrasonic Transducers. In: Proceedings of the 18th International Congress on Acoustics, ICA. ; 2004:4-9.' apa: Fu, B., Hemsel, T., & Wallaschek, J. (2004). Model-based Diagnosis for Sandwiched Ultrasonic Transducers. In Proceedings of the 18th International Congress on Acoustics, ICA (pp. 4–9). bibtex: '@inproceedings{Fu_Hemsel_Wallaschek_2004, title={Model-based Diagnosis for Sandwiched Ultrasonic Transducers}, booktitle={Proceedings of the 18th International Congress on Acoustics, ICA}, author={Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg}, year={2004}, pages={4–9} }' chicago: Fu, Bo, Tobias Hemsel, and Jörg Wallaschek. “Model-Based Diagnosis for Sandwiched Ultrasonic Transducers.” In Proceedings of the 18th International Congress on Acoustics, ICA, 4–9, 2004. ieee: B. Fu, T. Hemsel, and J. Wallaschek, “Model-based Diagnosis for Sandwiched Ultrasonic Transducers,” in Proceedings of the 18th International Congress on Acoustics, ICA, 2004, pp. 4–9. mla: Fu, Bo, et al. “Model-Based Diagnosis for Sandwiched Ultrasonic Transducers.” Proceedings of the 18th International Congress on Acoustics, ICA, 2004, pp. 4–9. short: 'B. Fu, T. Hemsel, J. Wallaschek, in: Proceedings of the 18th International Congress on Acoustics, ICA, 2004, pp. 4–9.' date_created: 2019-04-15T12:06:00Z date_updated: 2022-01-06T07:04:05Z department: - _id: '151' language: - iso: eng page: 4-9 publication: Proceedings of the 18th International Congress on Acoustics, ICA status: public title: Model-based Diagnosis for Sandwiched Ultrasonic Transducers type: conference user_id: '55222' year: '2004' ... --- _id: '8952' abstract: - lang: eng text: In turbomachinery, friction contacts are widely used to reduce dynamic stresses in turbine blades in order to avoid expensive damages. As a result of energy dissipation in the friction contacts the blade vibration amplitudes are reduced. In case of so-called friction dampers, which are pressed on the platforms of the blades by centrifugal forces, the damping effect can be optimized by varying the damper mass. This optimization can be done by means of a simulation model applying the so-called component mode synthesis and the Harmonic Balance Method to reduce computation time. It is based on the modal description of each substructure. In a real turbine or compressor blading great differences in the magnitude of the individual blade amplitudes occur caused by unavoidable mistuning of all system parameters like contact parameters and natural frequencies of the blades. It may happen that most of the blades experience only small stresses whereas a few blades experience critical stresses. Therefore, it is necessary to consider mistuning for all system parameters to simulate the forced response of bladed disk assemblies with friction contacts. For a mistuned bladed disk the complete system has to be modeled to calculate the dynamic response. In practice, usually the standard deviations instead of the distributions of the system parameters are known. Therefore, Monte-Carlo simulations are necessary to calculate the forced response of the blades for given mean values and standard deviations of the system parameters. To reduce the computational time, an approximate method has been developed and extended for small and moderate standard deviations of the system parameters to calculate the distribution and the envelopes of the frequency response functions for statistically varying system parameters, in the following called statistical mistuning. The approximate method is based on a sensitivity analysis and the assumption of a Weibull distribution of the vibration amplitudes of the blades. Both, the approximate method and the assumption of a Weibull distribution of the vibration amplitudes are validated by Monte-Carlo simulations. By these investigations the influence of different arrangements of the system parameters for given mean values and standard deviations of the vibration amplitudes of the blades can be determined, too. For the present investigations only a small influence of the arrangement of blades with respect to their natural frequencies has been observed. On the other hand, an intentional mistuning of the damper masses and the natural frequencies of the blades in a systematic way, in the following called systematic mistuning, can be investigated to reduce the amplitudes of the system. The simulation results of a systematic mistuning has been validated by a test rig with a rotating bladed disk assembly with friction dampers. The investigations show a good agreement between the simulations and the measurements but only a slight decrease of the maximum amplitudes in case of a systematic mistuning. Copyright {\copyright} 2004 by ASME author: - first_name: Florian full_name: Götting, Florian last_name: Götting - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro - first_name: Lars full_name: Panning, Lars last_name: Panning - first_name: Karl full_name: Popp, Karl last_name: Popp citation: ama: 'Götting F, Sextro W, Panning L, Popp K. Systematic mistuning of bladed disk assemblies with friction contacts. In: Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air. Vol 6. ; 2004:257-267.' apa: Götting, F., Sextro, W., Panning, L., & Popp, K. (2004). Systematic mistuning of bladed disk assemblies with friction contacts. In Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air (Vol. 6, pp. 257–267). bibtex: '@inproceedings{Götting_Sextro_Panning_Popp_2004, title={Systematic mistuning of bladed disk assemblies with friction contacts}, volume={6}, number={GT2004-53310}, booktitle={Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air}, author={Götting, Florian and Sextro, Walter and Panning, Lars and Popp, Karl}, year={2004}, pages={257–267} }' chicago: Götting, Florian, Walter Sextro, Lars Panning, and Karl Popp. “Systematic Mistuning of Bladed Disk Assemblies with Friction Contacts.” In Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, 6:257–67, 2004. ieee: F. Götting, W. Sextro, L. Panning, and K. Popp, “Systematic mistuning of bladed disk assemblies with friction contacts,” in Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, 2004, vol. 6, no. GT2004-53310, pp. 257–267. mla: Götting, Florian, et al. “Systematic Mistuning of Bladed Disk Assemblies with Friction Contacts.” Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, vol. 6, no. GT2004-53310, 2004, pp. 257–67. short: 'F. Götting, W. Sextro, L. Panning, K. Popp, in: Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, 2004, pp. 257–267.' date_created: 2019-04-15T12:07:32Z date_updated: 2022-01-06T07:04:05Z department: - _id: '151' intvolume: ' 6' issue: GT2004-53310 keyword: - Friction - Disks language: - iso: eng page: 257-267 publication: Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air status: public title: Systematic mistuning of bladed disk assemblies with friction contacts type: conference user_id: '55222' volume: 6 year: '2004' ... --- _id: '8953' author: - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: 'Hemsel T. Linear piezoelectric motors and their application. In: Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA). Seoul, Korea; 2004.' apa: Hemsel, T. (2004). Linear piezoelectric motors and their application. In Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA). Seoul, Korea. bibtex: '@inproceedings{Hemsel_2004, place={Seoul, Korea}, title={Linear piezoelectric motors and their application}, booktitle={Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA)}, author={Hemsel, Tobias}, year={2004} }' chicago: Hemsel, Tobias. “Linear Piezoelectric Motors and Their Application.” In Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA). Seoul, Korea, 2004. ieee: T. Hemsel, “Linear piezoelectric motors and their application,” in Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA), 2004. mla: Hemsel, Tobias. “Linear Piezoelectric Motors and Their Application.” Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA), 2004. short: 'T. Hemsel, in: Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA), Seoul, Korea, 2004.' date_created: 2019-04-15T12:09:06Z date_updated: 2022-01-06T07:04:05Z department: - _id: '151' language: - iso: eng place: Seoul, Korea publication: Proceedings of the First International Conference on Ultrasonic Motors and Actuators (IWOUMA) status: public title: Linear piezoelectric motors and their application type: conference user_id: '55222' year: '2004' ... --- _id: '9519' abstract: - lang: eng text: 'Several positioning tasks demand translatory drive instead of rotary motion. To achieve drives that are capable e.g. to drive the sunroof of a car or to lift a car''s window, multiple miniaturized motors can be combined. But in this case many other questions arise: the electromechanical behavior of the individual motors differs slightly, the motor characteristics are strongly dependent on the driving parameters and the driven load, many applications need some extra power for special cases like overcoming higher forces periodically. Thus, the bundle of motors has to act well organized and controlled to get an optimized drive that is not oversized and costly.' author: - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Maik full_name: Mracek, Maik last_name: Mracek - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek - first_name: Piotr full_name: Vasiljev, Piotr last_name: Vasiljev citation: ama: 'Hemsel T, Mracek M, Wallaschek J, Vasiljev P. A novel approach for high power ultrasonic linear motors. In: Ultrasonics Symposium, 2004 IEEE. Vol 2. ; 2004:1161-1164. doi:10.1109/ULTSYM.2004.1417988' apa: Hemsel, T., Mracek, M., Wallaschek, J., & Vasiljev, P. (2004). A novel approach for high power ultrasonic linear motors. In Ultrasonics Symposium, 2004 IEEE (Vol. 2, pp. 1161–1164). https://doi.org/10.1109/ULTSYM.2004.1417988 bibtex: '@inproceedings{Hemsel_Mracek_Wallaschek_Vasiljev_2004, title={A novel approach for high power ultrasonic linear motors}, volume={2}, DOI={10.1109/ULTSYM.2004.1417988}, number={Vol.2}, booktitle={Ultrasonics Symposium, 2004 IEEE}, author={Hemsel, Tobias and Mracek, Maik and Wallaschek, Jörg and Vasiljev, Piotr}, year={2004}, pages={1161–1164} }' chicago: Hemsel, Tobias, Maik Mracek, Jörg Wallaschek, and Piotr Vasiljev. “A Novel Approach for High Power Ultrasonic Linear Motors.” In Ultrasonics Symposium, 2004 IEEE, 2:1161–64, 2004. https://doi.org/10.1109/ULTSYM.2004.1417988. ieee: T. Hemsel, M. Mracek, J. Wallaschek, and P. Vasiljev, “A novel approach for high power ultrasonic linear motors,” in Ultrasonics Symposium, 2004 IEEE, 2004, vol. 2, no. Vol.2, pp. 1161–1164. mla: Hemsel, Tobias, et al. “A Novel Approach for High Power Ultrasonic Linear Motors.” Ultrasonics Symposium, 2004 IEEE, vol. 2, no. Vol.2, 2004, pp. 1161–64, doi:10.1109/ULTSYM.2004.1417988. short: 'T. Hemsel, M. Mracek, J. Wallaschek, P. Vasiljev, in: Ultrasonics Symposium, 2004 IEEE, 2004, pp. 1161–1164.' date_created: 2019-04-29T08:12:06Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' doi: 10.1109/ULTSYM.2004.1417988 intvolume: ' 2' issue: Vol.2 keyword: - drives - electromechanical effects - linear motors - ultrasonic motors - car sunroof - car window - electromechanical behavior - high power ultrasonic linear motors - multiple miniaturized motors - positioning tasks - translatory drive - Costs - Electromagnetic forces - Frequency - Laboratories - Manufacturing - Mechatronics - Micromotors - Ultrasonic imaging - Vibrations - Voltage language: - iso: eng page: 1161-1164 publication: Ultrasonics Symposium, 2004 IEEE publication_identifier: issn: - 1051-0117 quality_controlled: '1' status: public title: A novel approach for high power ultrasonic linear motors type: conference user_id: '55222' volume: 2 year: '2004' ... --- _id: '9520' abstract: - lang: eng text: Friction, especially friction of elastomers, can cause acoustic problems like noise, squeal and comfort drawbacks like vibrations and wear. Therefore, rubber friction affects the function of many products in technical applications, e.g. seals, belts and tires. It can be classified according to different physical phenomena like adhesion, hysteresis, cohesion and viscous friction, see [3]. The topic of this paper is hysteresis friction of rubber that is caused by the energy dissipation due to internal material damping during the process of deformation. The deformation itself occurs during the sliding of a rubber element across the micro-scaled asperities of a rough surface. In this paper, the sliding process of a rubber element over real surfaces is simulated in time domain and compared to experiments. ({\^A}{\copyright} 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) author: - first_name: Markus full_name: Lindner, Markus last_name: Lindner - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro - first_name: Karl full_name: Popp, Karl last_name: Popp citation: ama: Lindner M, Sextro W, Popp K. Hysteretic Friction of a Sliding Rubber Element. PAMM. 2004;4(1):101-102. doi:10.1002/pamm.200410032 apa: Lindner, M., Sextro, W., & Popp, K. (2004). Hysteretic Friction of a Sliding Rubber Element. PAMM, 4(1), 101–102. https://doi.org/10.1002/pamm.200410032 bibtex: '@article{Lindner_Sextro_Popp_2004, title={Hysteretic Friction of a Sliding Rubber Element}, volume={4}, DOI={10.1002/pamm.200410032}, number={1}, journal={PAMM}, publisher={WILEY-VCH Verlag}, author={Lindner, Markus and Sextro, Walter and Popp, Karl}, year={2004}, pages={101–102} }' chicago: 'Lindner, Markus, Walter Sextro, and Karl Popp. “Hysteretic Friction of a Sliding Rubber Element.” PAMM 4, no. 1 (2004): 101–2. https://doi.org/10.1002/pamm.200410032.' ieee: M. Lindner, W. Sextro, and K. Popp, “Hysteretic Friction of a Sliding Rubber Element,” PAMM, vol. 4, no. 1, pp. 101–102, 2004. mla: Lindner, Markus, et al. “Hysteretic Friction of a Sliding Rubber Element.” PAMM, vol. 4, no. 1, WILEY-VCH Verlag, 2004, pp. 101–02, doi:10.1002/pamm.200410032. short: M. Lindner, W. Sextro, K. Popp, PAMM 4 (2004) 101–102. date_created: 2019-04-29T08:14:26Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' doi: 10.1002/pamm.200410032 intvolume: ' 4' issue: '1' language: - iso: eng page: 101-102 publication: PAMM publication_identifier: issn: - 1617-7061 publisher: WILEY-VCH Verlag status: public title: Hysteretic Friction of a Sliding Rubber Element type: journal_article user_id: '55222' volume: 4 year: '2004' ... --- _id: '9521' author: - first_name: Walter full_name: Littmann, Walter last_name: Littmann - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek citation: ama: 'Littmann W, Hemsel T, Wallaschek J. Design criteria for piezoelectric transformers. In: Proceedings of the 18th International Congress on Acoustics. Vol 4. ; 2004:2889-2892.' apa: Littmann, W., Hemsel, T., & Wallaschek, J. (2004). Design criteria for piezoelectric transformers. In Proceedings of the 18th International Congress on Acoustics (Vol. 4, pp. 2889–2892). bibtex: '@inproceedings{Littmann_Hemsel_Wallaschek_2004, title={Design criteria for piezoelectric transformers}, volume={4}, booktitle={Proceedings of the 18th International Congress on Acoustics}, author={Littmann, Walter and Hemsel, Tobias and Wallaschek, Jörg}, year={2004}, pages={2889–2892} }' chicago: Littmann, Walter, Tobias Hemsel, and Jörg Wallaschek. “Design Criteria for Piezoelectric Transformers.” In Proceedings of the 18th International Congress on Acoustics, 4:2889–92, 2004. ieee: W. Littmann, T. Hemsel, and J. Wallaschek, “Design criteria for piezoelectric transformers,” in Proceedings of the 18th International Congress on Acoustics, 2004, vol. 4, pp. 2889–2892. mla: Littmann, Walter, et al. “Design Criteria for Piezoelectric Transformers.” Proceedings of the 18th International Congress on Acoustics, vol. 4, 2004, pp. 2889–92. short: 'W. Littmann, T. Hemsel, J. Wallaschek, in: Proceedings of the 18th International Congress on Acoustics, 2004, pp. 2889–2892.' date_created: 2019-04-29T08:15:55Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' intvolume: ' 4' language: - iso: eng page: 2889-2892 publication: Proceedings of the 18th International Congress on Acoustics status: public title: Design criteria for piezoelectric transformers type: conference user_id: '55222' volume: 4 year: '2004' ... --- _id: '9522' author: - first_name: Maik full_name: Mracek, Maik last_name: Mracek - first_name: Jörg full_name: Wallaschek, Jörg last_name: Wallaschek - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: 'Mracek M, Wallaschek J, Hemsel T. Self configuration of miniature ultrasonic linear motors. In: Proceedings of the 18th International Congress on Acoustics. ; 2004:417-420.' apa: Mracek, M., Wallaschek, J., & Hemsel, T. (2004). Self configuration of miniature ultrasonic linear motors. In Proceedings of the 18th International Congress on Acoustics (pp. 417–420). bibtex: '@inproceedings{Mracek_Wallaschek_Hemsel_2004, title={Self configuration of miniature ultrasonic linear motors}, booktitle={Proceedings of the 18th International Congress on Acoustics}, author={Mracek, Maik and Wallaschek, Jörg and Hemsel, Tobias}, year={2004}, pages={417–420} }' chicago: Mracek, Maik, Jörg Wallaschek, and Tobias Hemsel. “Self Configuration of Miniature Ultrasonic Linear Motors.” In Proceedings of the 18th International Congress on Acoustics, 417–20, 2004. ieee: M. Mracek, J. Wallaschek, and T. Hemsel, “Self configuration of miniature ultrasonic linear motors,” in Proceedings of the 18th International Congress on Acoustics, 2004, pp. 417–420. mla: Mracek, Maik, et al. “Self Configuration of Miniature Ultrasonic Linear Motors.” Proceedings of the 18th International Congress on Acoustics, 2004, pp. 417–20. short: 'M. Mracek, J. Wallaschek, T. Hemsel, in: Proceedings of the 18th International Congress on Acoustics, 2004, pp. 417–420.' date_created: 2019-04-29T08:17:15Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' language: - iso: eng page: 417-420 publication: Proceedings of the 18th International Congress on Acoustics status: public title: Self configuration of miniature ultrasonic linear motors type: conference user_id: '55222' year: '2004' ... --- _id: '9523' abstract: - lang: eng text: During operation, the rotating blades of a gas turbine are subjected to centrifugal forces as well as fluctuating gas forces, resulting in blade vibrations. In addition to material damping, aerodynamical and blade root damping, underplatform dampers are widely used to increase the amount of damping and to decrease blade vibration amplitudes. The friction forces generated by the relative displacements between the underplatform damper and the blade platforms provide a significant amount of energy dissipation. In practice, a number of different underplatform damper designs are applied. Basically, these are wedge dampers with flat contact areas, cylindrical dampers with curved surfaces or asymmetrical dampers with both flat contact surfaces on one side and curved contact surfaces on the other. The latter damper type combines the advantages of both the wedge and the cylindrical damper by preventing the damper from pure rolling on the one hand as it has been observed for cylindrical dampers and on the other hand, avoiding a diverged plane area contact in case of a wedge damper, causing a damper lift-off. This paper will focus on the investigation of cylindrical and asymmetrical underplatform dampers. A comparison between measurements of rotating assemblies in Siemens PG gas turbines (V84.2, V64.3A and V94.3A(2)) under test and real operating conditions with cylindrical and asymmetrical underplatform dampers and the predictions of the developed theoretical model are presented. Special attention is paid to the frequency shift due to the application of an underplatform damper, since in particular for stationary gas turbines, in addition to the amplitude reduction, the accurate prediction of the resonance frequency is of major interest. Copyright {\copyright} 2004 by ASME author: - first_name: Lars full_name: Panning, Lars last_name: Panning - first_name: Karl full_name: Popp, Karl last_name: Popp - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro - first_name: Florian full_name: Götting, Florian last_name: Götting citation: ama: 'Panning L, Popp K, Sextro W, Götting F. Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application. In: Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air. Vol 6. Vienna, Austria; 2004:269-280. doi:10.1115/GT2004-53316' apa: 'Panning, L., Popp, K., Sextro, W., & Götting, F. (2004). Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application. In Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air (Vol. 6, pp. 269–280). Vienna, Austria. https://doi.org/10.1115/GT2004-53316' bibtex: '@inproceedings{Panning_Popp_Sextro_Götting_2004, place={Vienna, Austria}, title={Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application}, volume={6}, DOI={10.1115/GT2004-53316}, number={GT2004-53316}, booktitle={Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air}, author={Panning, Lars and Popp, Karl and Sextro, Walter and Götting, Florian}, year={2004}, pages={269–280} }' chicago: 'Panning, Lars, Karl Popp, Walter Sextro, and Florian Götting. “Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application.” In Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, 6:269–80. Vienna, Austria, 2004. https://doi.org/10.1115/GT2004-53316.' ieee: 'L. Panning, K. Popp, W. Sextro, and F. Götting, “Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application,” in Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, 2004, vol. 6, no. GT2004-53316, pp. 269–280.' mla: 'Panning, Lars, et al. “Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application.” Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, vol. 6, no. GT2004-53316, 2004, pp. 269–80, doi:10.1115/GT2004-53316.' short: 'L. Panning, K. Popp, W. Sextro, F. Götting, in: Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air, Vienna, Austria, 2004, pp. 269–280.' date_created: 2019-04-29T08:19:15Z date_updated: 2022-01-06T07:04:16Z department: - _id: '151' doi: 10.1115/GT2004-53316 intvolume: ' 6' issue: GT2004-53316 keyword: - Dampers - Gas turbines language: - iso: eng page: 269-280 place: Vienna, Austria publication: Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air status: public title: 'Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application' type: conference user_id: '55222' volume: 6 year: '2004' ...