--- _id: '9748' abstract: - lang: eng text: For many technical applications it is necessary to avoid or to reduce vibrations. Factors benefiting from vibration reduction are for example the durability of the application, which is increased, as well as cost expenses and the level of noise, which are both decreased. Rough, bolted interfaces are common in most machines and can be used as damping devices with some effort. Perhaps in future such contact surfaces could be used as damping devices at the interfaces of an automotive engine or exhaust system. Nevertheless it is difficult to predict the effect of a change in contact interface parameters on the dynamic behavior of the entire mechanical system. Therefore a method for calculating the steady state behavior of elastic multi-body systems was developed. The basis of this method is a finite element model of each contacting unit. On each model a modal reduction is applied in order to reduce the degrees of freedom. The method of Ritz and Galerkin is used to calculate the frequency response functions of the reduced system including contact. This method allows the calculation of the steady-state behavior of elastic multi-body systems with rough, bolted contact interfaces, by taking the pre-stress of the bolts, the roughness and the friction coefficient of the contacting surfaces as parameters. In order to verify calculated results, a test stand was built. The comparison of calculated and experimental results showed a satisfying correlation. author: - first_name: Johannes Sebastian full_name: ' Hölzl, Johannes Sebastian' last_name: ' Hölzl' - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: Hölzl JS, Sextro W. Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces. SAE International Journal of Passenger Cars- Mechanical Systems. 2010:929-935. doi:10.4271/2010-01-1422 apa: Hölzl, J. S., & Sextro, W. (2010). Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces. SAE International Journal of Passenger Cars- Mechanical Systems, 929–935. https://doi.org/10.4271/2010-01-1422 bibtex: '@article{ Hölzl_Sextro_2010, title={Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces}, DOI={10.4271/2010-01-1422}, journal={SAE International Journal of Passenger Cars- Mechanical Systems}, author={ Hölzl, Johannes Sebastian and Sextro, Walter}, year={2010}, pages={929–935} }' chicago: Hölzl, Johannes Sebastian, and Walter Sextro. “Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces.” SAE International Journal of Passenger Cars- Mechanical Systems, 2010, 929–35. https://doi.org/10.4271/2010-01-1422. ieee: J. S. Hölzl and W. Sextro, “Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces,” SAE International Journal of Passenger Cars- Mechanical Systems, pp. 929–935, 2010. mla: Hölzl, Johannes Sebastian, and Walter Sextro. “Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces.” SAE International Journal of Passenger Cars- Mechanical Systems, 2010, pp. 929–35, doi:10.4271/2010-01-1422. short: J.S. Hölzl, W. Sextro, SAE International Journal of Passenger Cars- Mechanical Systems (2010) 929–935. date_created: 2019-05-13T09:49:24Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.4271/2010-01-1422 keyword: - Automotive language: - iso: eng page: 929-935 publication: SAE International Journal of Passenger Cars- Mechanical Systems quality_controlled: '1' status: public title: Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces type: journal_article user_id: '55222' year: '2010' ... --- _id: '9749' abstract: - lang: eng text: Piezoelectric materials find wide application in technical systems. Most often, a combination of piezoelectric and other materials is advantageous. The position and the amount of the piezoelectric material within the overall system depends on various aspects like maximum mechanical output to the load, maximum electromechanical efficiency of the system, maximum utilization of the piezoelectric material, minimum self-heating of the piezoelectric material, and controllability of the system, which might be key aspects for the optimisation of the system design. For a composite longitudinal vibrator (bolted Langevin transducer), which is a base for many technical applications, this contribution shows in detail, how above mentioned aspects depend on the position and volume of the piezoelectric material related to the mode shape. author: - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Ernst Günther full_name: Lierk, Ernst Günther last_name: Lierk - first_name: Walter full_name: Littmann, Walter last_name: Littmann - first_name: Takeshi full_name: Morita, Takeshi last_name: Morita citation: ama: Hemsel T, Lierk EG, Littmann W, Morita T. Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers. Journal of Korean Physical Society. 2010;57(4):933-937. doi:10.3938/jkps.57.933 apa: Hemsel, T., Lierk, E. G., Littmann, W., & Morita, T. (2010). Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers. Journal of Korean Physical Society, 57(4), 933–937. https://doi.org/10.3938/jkps.57.933 bibtex: '@article{Hemsel_Lierk_Littmann_Morita_2010, title={Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers}, volume={57}, DOI={10.3938/jkps.57.933}, number={4}, journal={Journal of Korean Physical Society}, author={Hemsel, Tobias and Lierk, Ernst Günther and Littmann, Walter and Morita, Takeshi}, year={2010}, pages={933–937} }' chicago: 'Hemsel, Tobias, Ernst Günther Lierk, Walter Littmann, and Takeshi Morita. “Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers.” Journal of Korean Physical Society 57, no. 4 (2010): 933–37. https://doi.org/10.3938/jkps.57.933.' ieee: T. Hemsel, E. G. Lierk, W. Littmann, and T. Morita, “Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers,” Journal of Korean Physical Society, vol. 57, no. 4, pp. 933–937, 2010. mla: Hemsel, Tobias, et al. “Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers.” Journal of Korean Physical Society, vol. 57, no. 4, 2010, pp. 933–37, doi:10.3938/jkps.57.933. short: T. Hemsel, E.G. Lierk, W. Littmann, T. Morita, Journal of Korean Physical Society 57 (2010) 933–937. date_created: 2019-05-13T09:56:22Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.3938/jkps.57.933 intvolume: ' 57' issue: '4' keyword: - Bolted Langevin transducer - Optimum placement of piezoelectric ceramics language: - iso: eng page: 933-937 publication: Journal of Korean Physical Society publication_identifier: issn: - 1948-5719 quality_controlled: '1' status: public title: Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers type: journal_article user_id: '55222' volume: 57 year: '2010' ... --- _id: '9750' author: - first_name: D. full_name: Hess, D. last_name: Hess - first_name: Thorsten full_name: Hüfner, Thorsten last_name: Hüfner - first_name: Tobias full_name: Hesse, Tobias last_name: Hesse - first_name: Christoph full_name: Sondermann-Wölke, Christoph last_name: Sondermann-Wölke - first_name: Thomas full_name: Sattel, Thomas last_name: Sattel citation: ama: Hess D, Hüfner T, Hesse T, Sondermann-Wölke C, Sattel T. Intelligente mechatronische Systeme zur automatisierten Fahrzeugführung in Fahrerassistenzsystemen. Internationales Mechatronik-Kolloquium “Mechatronik 2010.” 2010. apa: Hess, D., Hüfner, T., Hesse, T., Sondermann-Wölke, C., & Sattel, T. (2010). Intelligente mechatronische Systeme zur automatisierten Fahrzeugführung in Fahrerassistenzsystemen. Internationales Mechatronik-Kolloquium “Mechatronik 2010.” bibtex: '@article{Hess_Hüfner_Hesse_Sondermann-Wölke_Sattel_2010, title={Intelligente mechatronische Systeme zur automatisierten Fahrzeugführung in Fahrerassistenzsystemen}, journal={Internationales Mechatronik-Kolloquium “Mechatronik 2010”}, author={Hess, D. and Hüfner, Thorsten and Hesse, Tobias and Sondermann-Wölke, Christoph and Sattel, Thomas}, year={2010} }' chicago: Hess, D., Thorsten Hüfner, Tobias Hesse, Christoph Sondermann-Wölke, and Thomas Sattel. “Intelligente Mechatronische Systeme Zur Automatisierten Fahrzeugführung in Fahrerassistenzsystemen.” Internationales Mechatronik-Kolloquium “Mechatronik 2010,” 2010. ieee: D. Hess, T. Hüfner, T. Hesse, C. Sondermann-Wölke, and T. Sattel, “Intelligente mechatronische Systeme zur automatisierten Fahrzeugführung in Fahrerassistenzsystemen,” Internationales Mechatronik-Kolloquium “Mechatronik 2010,” 2010. mla: Hess, D., et al. “Intelligente Mechatronische Systeme Zur Automatisierten Fahrzeugführung in Fahrerassistenzsystemen.” Internationales Mechatronik-Kolloquium “Mechatronik 2010,” 2010. short: D. Hess, T. Hüfner, T. Hesse, C. Sondermann-Wölke, T. Sattel, Internationales Mechatronik-Kolloquium “Mechatronik 2010” (2010). date_created: 2019-05-13T09:58:41Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' language: - iso: eng publication: Internationales Mechatronik-Kolloquium "Mechatronik 2010" status: public title: Intelligente mechatronische Systeme zur automatisierten Fahrzeugführung in Fahrerassistenzsystemen type: journal_article user_id: '55222' year: '2010' ... --- _id: '9751' abstract: - lang: eng text: 'Piezoelectric inertia motors have a simple construction and are controlled by a single driving signal. This allows for miniaturization and low cost production. One of the main questions to be answered during the design process of a piezoelectric inertia motor is which electrical excitation signal yields optimum motor characteristics. Three signals and their variants are widely used in literature: sawtooth, parabolic and cycloidic signals. It can be shown that neither of these can drive the motor at its maximum possible velocity in non-resonant operation. Within this paper we propose to use a rigid body model of a simple inertia motor to predict the motor characteristics depending on the movement pattern of the driving element. Advantages and disadvantages of three different drive signals that maximize the motor velocity are discussed.' author: - first_name: Matthias full_name: Hunstig, Matthias last_name: Hunstig - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: Hunstig M, Hemsel T. Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors. Journal of Korean Physical Society. 2010;57(4):938-941. doi:10.3938/jkps.57.938 apa: Hunstig, M., & Hemsel, T. (2010). Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors. Journal of Korean Physical Society, 57(4), 938–941. https://doi.org/10.3938/jkps.57.938 bibtex: '@article{Hunstig_Hemsel_2010, title={Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors}, volume={57}, DOI={10.3938/jkps.57.938}, number={4}, journal={Journal of Korean Physical Society}, author={Hunstig, Matthias and Hemsel, Tobias}, year={2010}, pages={938–941} }' chicago: 'Hunstig, Matthias, and Tobias Hemsel. “Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors.” Journal of Korean Physical Society 57, no. 4 (2010): 938–41. https://doi.org/10.3938/jkps.57.938.' ieee: M. Hunstig and T. Hemsel, “Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors,” Journal of Korean Physical Society, vol. 57, no. 4, pp. 938–941, 2010. mla: Hunstig, Matthias, and Tobias Hemsel. “Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors.” Journal of Korean Physical Society, vol. 57, no. 4, 2010, pp. 938–41, doi:10.3938/jkps.57.938. short: M. Hunstig, T. Hemsel, Journal of Korean Physical Society 57 (2010) 938–941. date_created: 2019-05-13T10:03:06Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.3938/jkps.57.938 intvolume: ' 57' issue: '4' language: - iso: eng page: 938-941 publication: Journal of Korean Physical Society publication_identifier: issn: - 1948-5719 quality_controlled: '1' status: public title: Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors type: journal_article user_id: '55222' volume: 57 year: '2010' ... --- _id: '9752' abstract: - lang: eng text: Piezoelectric inertia motors make use of the inertia of a slider to drive the slider by friction contact in a series of small steps which are generally composed of a stick phase and a slip phase. If the best electrical drive signal for the piezoelectric actuator in an inertia motor is to be determined, its dynamical behaviour must be known. A classic dynamic lumped parameter model for piezoelectric actuators is valid only in resonance and, therefore, is not suitable for modelling the actuator in an inertia motor. A reduced dynamic model is used instead. Its parameters are identified using a step response measurement. This model is used to predict the movement of the actuator in response to a velocity-optimized signal introduced in a separate contribution. Results show that the model cannot represent the dynamical characteristics of the actuator completely. For determining voltage signals that let piezoelectric actuators follow a calculated movement pattern exactly, the model can, therefore, only be used with limitations. author: - first_name: Matthias full_name: Hunstig, Matthias last_name: Hunstig - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: Hunstig M, Hemsel T. Parameter Identification and Model Validation for the Piezoelectric Actuator in an Inertia Motor. Journal of Korean Physical Society. 2010;57(4):952-954. doi:10.3938/jkps.57.952 apa: Hunstig, M., & Hemsel, T. (2010). Parameter Identification and Model Validation for the Piezoelectric Actuator in an Inertia Motor. Journal of Korean Physical Society, 57(4), 952–954. https://doi.org/10.3938/jkps.57.952 bibtex: '@article{Hunstig_Hemsel_2010, title={Parameter Identification and Model Validation for the Piezoelectric Actuator in an Inertia Motor}, volume={57}, DOI={10.3938/jkps.57.952}, number={4}, journal={Journal of Korean Physical Society}, author={Hunstig, Matthias and Hemsel, Tobias}, year={2010}, pages={952–954} }' chicago: 'Hunstig, Matthias, and Tobias Hemsel. “Parameter Identification and Model Validation for the Piezoelectric Actuator in an Inertia Motor.” Journal of Korean Physical Society 57, no. 4 (2010): 952–54. https://doi.org/10.3938/jkps.57.952.' ieee: M. Hunstig and T. Hemsel, “Parameter Identification and Model Validation for the Piezoelectric Actuator in an Inertia Motor,” Journal of Korean Physical Society, vol. 57, no. 4, pp. 952–954, 2010. mla: Hunstig, Matthias, and Tobias Hemsel. “Parameter Identification and Model Validation for the Piezoelectric Actuator in an Inertia Motor.” Journal of Korean Physical Society, vol. 57, no. 4, 2010, pp. 952–54, doi:10.3938/jkps.57.952. short: M. Hunstig, T. Hemsel, Journal of Korean Physical Society 57 (2010) 952–954. date_created: 2019-05-13T10:04:13Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.3938/jkps.57.952 intvolume: ' 57' issue: '4' language: - iso: eng page: 952-954 publication: Journal of Korean Physical Society publication_identifier: issn: - 1948-5719 quality_controlled: '1' status: public title: Parameter Identification and Model Validation for the Piezoelectric Actuator in an Inertia Motor type: journal_article user_id: '55222' volume: 57 year: '2010' ... --- _id: '9753' abstract: - lang: eng text: 'Piezoelektrische Trägheitsmotoren nutzen die Trägheit einer bewegten Masse, um diese in kleinen Schritten durch abwechselnde Haft- und Gleitphasen voranzutreiben. Eine Kernfrage bei der Entwicklung eines piezoelektrischen Trägheitsmotors ist, welches elektrische Ansteuersignal für das gewünschte Motorverhalten optimal ist. Das elektrische Signal führt zu einer Bewegung des piezoelektrischen Aktors und damit der Antriebsstange, die den reibschlüssigen Vortrieb bewirkt. Entsprechend wird diese Fragestellung in zwei Teilen untersucht: Anhand eines Starrkörpermodells werden zunächst Bewegungsverläufe für die Antriebsstange ermittelt, mit denen die maximale Geschwindigkeit erreicht wird. Dabei werden drei Antriebsmodi identifiziert. Mit allen kann eine höhere Geschwindigkeit als mit der heute häufig verwendeten Sägezahnanregung erreicht werden. Anschließend wird ein einfaches dynamisches Modell eines piezoelektrischen Aktors genutzt, um die notwendigen elektrischen Ansteuersignale für die verschiedenen Antriebsmodi zu bestimmen. Es zeigt sich, dass das gewählte einfache Modell hierzu nur bedingt geeignet ist.' author: - first_name: Matthias full_name: Hunstig, Matthias last_name: Hunstig - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: 'Hunstig M, Hemsel T, Sextro W. Anregungskonzepte und Modellierung piezoelektrischer Trägheitsmotoren. In: Gausemeier J, Rammig F, Schäfer W, Trächtler A, eds. 7. Paderborner Workshop Entwurf Mechatronischer Systeme. Vol 272. HNI-Verlagsschriftenreihe. Paderborn: Heinz Nixdorf Institut, Universität Paderborn; 2010:129-141.' apa: 'Hunstig, M., Hemsel, T., & Sextro, W. (2010). Anregungskonzepte und Modellierung piezoelektrischer Trägheitsmotoren. In J. Gausemeier, F. Rammig, W. Schäfer, & A. Trächtler (Eds.), 7. Paderborner Workshop Entwurf mechatronischer Systeme (Vol. 272, pp. 129–141). Paderborn: Heinz Nixdorf Institut, Universität Paderborn.' bibtex: '@inproceedings{Hunstig_Hemsel_Sextro_2010, place={Paderborn}, series={HNI-Verlagsschriftenreihe}, title={Anregungskonzepte und Modellierung piezoelektrischer Trägheitsmotoren}, volume={272}, booktitle={7. Paderborner Workshop Entwurf mechatronischer Systeme}, publisher={Heinz Nixdorf Institut, Universität Paderborn}, author={Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, editor={Gausemeier, Jürgen and Rammig, Franz and Schäfer, Wilhelm and Trächtler, AnsgarEditors}, year={2010}, pages={129–141}, collection={HNI-Verlagsschriftenreihe} }' chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Anregungskonzepte Und Modellierung Piezoelektrischer Trägheitsmotoren.” In 7. Paderborner Workshop Entwurf Mechatronischer Systeme, edited by Jürgen Gausemeier, Franz Rammig, Wilhelm Schäfer, and Ansgar Trächtler, 272:129–41. HNI-Verlagsschriftenreihe. Paderborn: Heinz Nixdorf Institut, Universität Paderborn, 2010.' ieee: M. Hunstig, T. Hemsel, and W. Sextro, “Anregungskonzepte und Modellierung piezoelektrischer Trägheitsmotoren,” in 7. Paderborner Workshop Entwurf mechatronischer Systeme, 2010, vol. 272, pp. 129–141. mla: Hunstig, Matthias, et al. “Anregungskonzepte Und Modellierung Piezoelektrischer Trägheitsmotoren.” 7. Paderborner Workshop Entwurf Mechatronischer Systeme, edited by Jürgen Gausemeier et al., vol. 272, Heinz Nixdorf Institut, Universität Paderborn, 2010, pp. 129–41. short: 'M. Hunstig, T. Hemsel, W. Sextro, in: J. Gausemeier, F. Rammig, W. Schäfer, A. Trächtler (Eds.), 7. Paderborner Workshop Entwurf Mechatronischer Systeme, Heinz Nixdorf Institut, Universität Paderborn, Paderborn, 2010, pp. 129–141.' date_created: 2019-05-13T10:05:14Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' editor: - first_name: Jürgen full_name: Gausemeier, Jürgen last_name: Gausemeier - first_name: Franz full_name: Rammig, Franz last_name: Rammig - first_name: Wilhelm full_name: Schäfer, Wilhelm last_name: Schäfer - first_name: Ansgar full_name: Trächtler, Ansgar last_name: Trächtler intvolume: ' 272' keyword: - Piezoelektrischer Trägheitsmotoren language: - iso: eng page: 129-141 place: Paderborn publication: 7. Paderborner Workshop Entwurf mechatronischer Systeme publication_identifier: issn: - 0924-4247 publisher: Heinz Nixdorf Institut, Universität Paderborn series_title: HNI-Verlagsschriftenreihe status: public title: Anregungskonzepte und Modellierung piezoelektrischer Trägheitsmotoren type: conference user_id: '55222' volume: 272 year: '2010' ... --- _id: '9754' abstract: - lang: eng text: A model based design approach for improved piezoelectric inertia motors is presented. Three velocityoptimized movement patterns for the driving body have been derived. The influence of the motor parameters and the process of designing an application specific motor with maximum velocity are shown. A simple dynamic model of the piezoelectric actuator is used to calculate the voltage signal for achieving the desired movement pattern. Observed distortions of the optimum pattern, their influence on the motion of the driven body and different methods to reduce them are discussed. author: - first_name: Matthias full_name: Hunstig, Matthias last_name: Hunstig - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: 'Hunstig M, Hemsel T, Sextro W. Improving the Performance of Piezoelectric Inertia Motors. In: ACTUATOR 2010 Conference Proceedings. ; 2010:657-661.' apa: Hunstig, M., Hemsel, T., & Sextro, W. (2010). Improving the Performance of Piezoelectric Inertia Motors. In ACTUATOR 2010 Conference Proceedings (pp. 657–661). bibtex: '@inproceedings{Hunstig_Hemsel_Sextro_2010, title={Improving the Performance of Piezoelectric Inertia Motors}, booktitle={ACTUATOR 2010 Conference Proceedings}, author={Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, year={2010}, pages={657–661} }' chicago: Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Improving the Performance of Piezoelectric Inertia Motors.” In ACTUATOR 2010 Conference Proceedings, 657–61, 2010. ieee: M. Hunstig, T. Hemsel, and W. Sextro, “Improving the Performance of Piezoelectric Inertia Motors,” in ACTUATOR 2010 Conference Proceedings, 2010, pp. 657–661. mla: Hunstig, Matthias, et al. “Improving the Performance of Piezoelectric Inertia Motors.” ACTUATOR 2010 Conference Proceedings, 2010, pp. 657–61. short: 'M. Hunstig, T. Hemsel, W. Sextro, in: ACTUATOR 2010 Conference Proceedings, 2010, pp. 657–661.' date_created: 2019-05-13T10:10:31Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' language: - iso: eng page: 657-661 publication: ACTUATOR 2010 Conference Proceedings publication_identifier: issn: - 0924-4247 quality_controlled: '1' status: public title: Improving the Performance of Piezoelectric Inertia Motors type: conference user_id: '55222' year: '2010' ... --- _id: '9755' author: - first_name: Verena full_name: Kraft , Verena last_name: 'Kraft ' - first_name: C. full_name: Bauch, C. last_name: Bauch - first_name: M. full_name: Nückel, M. last_name: Nückel - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: 'Kraft V, Bauch C, Nückel M, Hemsel T. Konzeption und Aufbau eines Langzeitforschungsstandes zur lichttechnischen Charakterisierung von organischen Leuchtdioden (OLEDs). In: 19. Gemeinschaftstagung LICHT 2010. Wien, Österreich; 2010.' apa: Kraft , V., Bauch, C., Nückel, M., & Hemsel, T. (2010). Konzeption und Aufbau eines Langzeitforschungsstandes zur lichttechnischen Charakterisierung von organischen Leuchtdioden (OLEDs). In 19. Gemeinschaftstagung LICHT 2010. Wien, Österreich. bibtex: '@inproceedings{Kraft _Bauch_Nückel_Hemsel_2010, place={Wien, Österreich}, title={Konzeption und Aufbau eines Langzeitforschungsstandes zur lichttechnischen Charakterisierung von organischen Leuchtdioden (OLEDs)}, booktitle={19. Gemeinschaftstagung LICHT 2010}, author={Kraft , Verena and Bauch, C. and Nückel, M. and Hemsel, Tobias}, year={2010} }' chicago: Kraft , Verena, C. Bauch, M. Nückel, and Tobias Hemsel. “Konzeption Und Aufbau Eines Langzeitforschungsstandes Zur Lichttechnischen Charakterisierung von Organischen Leuchtdioden (OLEDs).” In 19. Gemeinschaftstagung LICHT 2010. Wien, Österreich, 2010. ieee: V. Kraft , C. Bauch, M. Nückel, and T. Hemsel, “Konzeption und Aufbau eines Langzeitforschungsstandes zur lichttechnischen Charakterisierung von organischen Leuchtdioden (OLEDs),” in 19. Gemeinschaftstagung LICHT 2010, 2010. mla: Kraft , Verena, et al. “Konzeption Und Aufbau Eines Langzeitforschungsstandes Zur Lichttechnischen Charakterisierung von Organischen Leuchtdioden (OLEDs).” 19. Gemeinschaftstagung LICHT 2010, 2010. short: 'V. Kraft , C. Bauch, M. Nückel, T. Hemsel, in: 19. Gemeinschaftstagung LICHT 2010, Wien, Österreich, 2010.' date_created: 2019-05-13T10:11:42Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' language: - iso: eng place: Wien, Österreich popular_science: '1' publication: 19. Gemeinschaftstagung LICHT 2010 status: public title: Konzeption und Aufbau eines Langzeitforschungsstandes zur lichttechnischen Charakterisierung von organischen Leuchtdioden (OLEDs) type: conference user_id: '55222' year: '2010' ... --- _id: '9756' abstract: - lang: eng text: Dieser Beitrag fasst die bekannten analytischen Berechnungsmethoden für piezoelektrische Ultraschallverbundschwinger zusammen und gibt anhand typischer Beispiele Anleitungen zur Lösung theoretischer und technischer Fragen bei deren Entwicklung. Zunächst werden die passiven, in der Regel metallischen Komponenten von Verbundschwingern als Stab- oder Plattensysteme mit homogen verteilten Feder-, Masse und Dämpfungseigenschaften beschrieben. Hier breitet sich die Schwingungsenergie in Form stehender und fortschreitender Wellen zum akustischen Verbraucher hin aus. Es folgt eine gleichwertige und schaltungstreue Darstellung durch elektrische oder mechanische Vierpole, die für den Entwicklungsingenieur leichter zu handhaben sind und in Netzwerken direkt mit Masons Ersatzschaltung des piezoelektrischen Wandlers gekoppelt werden können. Danach werden die wichtigsten, messtechnisch zugänglichen Parameter anhand eines in Resonanznähe zulässigen Ersatzmodells mit konzentrierten elektrischen bzw. mechanischen Komponenten definiert. Als Schwerpunkt wird anschließend deren analytische Berechnung und messtechnische Verifizierung an typischen Beispielen demonstriert. Es folgen wichtige technische Informationen über Frequenzkorrekturen, Schallgeschwindigkeitsdispersion, Leistungs- und Belastbarkeitsgrenzen der Komponenten und andere wertvolle praktische Hinweise. author: - first_name: Ernst-Günter full_name: Lierke, Ernst-Günter last_name: Lierke - first_name: Walter full_name: Littmann, Walter last_name: Littmann - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: Lierke E-G, Littmann W, Hemsel T. Zur Theorie der piezoelektrischen Ultraschallverbundschwinger mit praktischen Schlussfolgerungen für den Entwicklungsingenieur. Veröffentlichung der Universität Paderborn. 2010. apa: Lierke, E.-G., Littmann, W., & Hemsel, T. (2010). Zur Theorie der piezoelektrischen Ultraschallverbundschwinger mit praktischen Schlussfolgerungen für den Entwicklungsingenieur. Veröffentlichung Der Universität Paderborn. bibtex: '@article{Lierke_Littmann_Hemsel_2010, title={Zur Theorie der piezoelektrischen Ultraschallverbundschwinger mit praktischen Schlussfolgerungen für den Entwicklungsingenieur}, journal={Veröffentlichung der Universität Paderborn}, author={Lierke, Ernst-Günter and Littmann, Walter and Hemsel, Tobias}, year={2010} }' chicago: Lierke, Ernst-Günter, Walter Littmann, and Tobias Hemsel. “Zur Theorie Der Piezoelektrischen Ultraschallverbundschwinger Mit Praktischen Schlussfolgerungen Für Den Entwicklungsingenieur.” Veröffentlichung Der Universität Paderborn, 2010. ieee: E.-G. Lierke, W. Littmann, and T. Hemsel, “Zur Theorie der piezoelektrischen Ultraschallverbundschwinger mit praktischen Schlussfolgerungen für den Entwicklungsingenieur,” Veröffentlichung der Universität Paderborn, 2010. mla: Lierke, Ernst-Günter, et al. “Zur Theorie Der Piezoelektrischen Ultraschallverbundschwinger Mit Praktischen Schlussfolgerungen Für Den Entwicklungsingenieur.” Veröffentlichung Der Universität Paderborn, 2010. short: E.-G. Lierke, W. Littmann, T. Hemsel, Veröffentlichung Der Universität Paderborn (2010). date_created: 2019-05-13T10:14:21Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' language: - iso: eng publication: Veröffentlichung der Universität Paderborn publication_identifier: issn: - 1948-5719 status: public title: Zur Theorie der piezoelektrischen Ultraschallverbundschwinger mit praktischen Schlussfolgerungen für den Entwicklungsingenieur type: journal_article user_id: '55222' year: '2010' ... --- _id: '9757' author: - first_name: Raimundas full_name: Lucinskis, Raimundas last_name: Lucinskis - first_name: Dalius full_name: Mazeika, Dalius last_name: Mazeika - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Ramutis full_name: Bansevicius, Ramutis last_name: Bansevicius citation: ama: Lucinskis R, Mazeika D, Hemsel T, Bansevicius R. The experimental research of piezoelectric actuator with two vectors of polarization direction. MECHANIKA. 2010. apa: Lucinskis, R., Mazeika, D., Hemsel, T., & Bansevicius, R. (2010). The experimental research of piezoelectric actuator with two vectors of polarization direction. MECHANIKA. bibtex: '@article{Lucinskis_Mazeika_Hemsel_Bansevicius_2010, title={The experimental research of piezoelectric actuator with two vectors of polarization direction}, journal={MECHANIKA}, author={Lucinskis, Raimundas and Mazeika, Dalius and Hemsel, Tobias and Bansevicius, Ramutis}, year={2010} }' chicago: Lucinskis, Raimundas, Dalius Mazeika, Tobias Hemsel, and Ramutis Bansevicius. “The Experimental Research of Piezoelectric Actuator with Two Vectors of Polarization Direction.” MECHANIKA, 2010. ieee: R. Lucinskis, D. Mazeika, T. Hemsel, and R. Bansevicius, “The experimental research of piezoelectric actuator with two vectors of polarization direction,” MECHANIKA, 2010. mla: Lucinskis, Raimundas, et al. “The Experimental Research of Piezoelectric Actuator with Two Vectors of Polarization Direction.” MECHANIKA, 2010. short: R. Lucinskis, D. Mazeika, T. Hemsel, R. Bansevicius, MECHANIKA (2010). date_created: 2019-05-13T10:18:38Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' language: - iso: eng publication: MECHANIKA publication_identifier: issn: - 1948-5719 quality_controlled: '1' status: public title: The experimental research of piezoelectric actuator with two vectors of polarization direction type: journal_article user_id: '55222' year: '2010' ... --- _id: '9758' abstract: - lang: eng text: As a lead-free piezoelectric ceramics, (K,Na)NbO$_{3}$ is a promising material because of its good piezoelectric properties. In this study, (K$_{1-x}$Na$_{x}$)NbO$_{3}$ ceramics were synthesized from a KNbO$_{3}$ and NaNbO$_{3}$ mixture powder prepared by the hydrothermal reaction. The hydrothermal reaction enables the production of high quality powder for the ceramics fabrication process. To obtain (K$_{1-x}$Na$_{x}$)NbO$_{3}$ ceramics, these two powders KNbO$_{3}$ and NaNbO$_{3}$ were mixed and then sintered together. X-Ray diffraction analysis revealed that the solid solution ceramics (K$_{1-x}$Na$_{x}$)NbO$_{3}$ was produced by the sintering process. The K/Na ratio in (K$_{1-x}$Na$_{x}$)NbO$_{3}$ ceramics was optimized for the best piezoelectric properties. The optimized forms was (K$_{0.48}$Na$_{0.52}$)NbO$_{3}$, which showed the following piezoelectric properties; k$_{33}$=0.56, d$_{33}$=114pC/N. In addition, the ferroelectric properties, P$_{r}$=7.72mC/cm$^{2}$, E$_{c}$=857V/mm, and the Curie temperature T$_{c}$=420$_{o}$C were also measured. author: - first_name: Takafumi full_name: Maeda, Takafumi last_name: Maeda - first_name: Norihito full_name: Takiguchi, Norihito last_name: Takiguchi - first_name: Takeshi full_name: Morita, Takeshi last_name: Morita - first_name: Mutsuo full_name: Ishikawa, Mutsuo last_name: Ishikawa - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: Maeda T, Takiguchi N, Morita T, Ishikawa M, Hemsel T. Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics. Journal of Korean Physical Society. 2010;57(4):924-928. doi:10.3938/jkps.57.924 apa: Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M., & Hemsel, T. (2010). Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics. Journal of Korean Physical Society, 57(4), 924–928. https://doi.org/10.3938/jkps.57.924 bibtex: '@article{Maeda_Takiguchi_Morita_Ishikawa_Hemsel_2010, title={Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics}, volume={57}, DOI={10.3938/jkps.57.924}, number={4}, journal={Journal of Korean Physical Society}, author={Maeda, Takafumi and Takiguchi, Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Hemsel, Tobias}, year={2010}, pages={924–928} }' chicago: 'Maeda, Takafumi, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa, and Tobias Hemsel. “Hydrothermal (K1-XNax)NbO3 Lead-Free Piezoelectric Ceramics.” Journal of Korean Physical Society 57, no. 4 (2010): 924–28. https://doi.org/10.3938/jkps.57.924.' ieee: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, and T. Hemsel, “Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics,” Journal of Korean Physical Society, vol. 57, no. 4, pp. 924–928, 2010. mla: Maeda, Takafumi, et al. “Hydrothermal (K1-XNax)NbO3 Lead-Free Piezoelectric Ceramics.” Journal of Korean Physical Society, vol. 57, no. 4, 2010, pp. 924–28, doi:10.3938/jkps.57.924. short: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, T. Hemsel, Journal of Korean Physical Society 57 (2010) 924–928. date_created: 2019-05-13T10:19:43Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.3938/jkps.57.924 intvolume: ' 57' issue: '4' keyword: - Lead-free piezoelectric material - KNN - Hydrothermal method language: - iso: eng page: 924-928 publication: Journal of Korean Physical Society publication_identifier: issn: - 1948-5719 quality_controlled: '1' status: public title: Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics type: journal_article user_id: '55222' volume: 57 year: '2010' ... --- _id: '9759' abstract: - lang: eng text: Among various lead-free piezoelectric materials, (K,Na)NbO$_{3}$ is a very promising candidate. In this study, (K,Na)NbO$_{3}$ ceramics were sintered from mixed (K,Na)NbO$_{3}$ and NaNbO$_{3}$ powders prepared by hydrothermal reaction. These two powders were mixed with distilled water in a KNbO$_{3}$/NaNbO$_{3}$ molar ratio of 1. After sintering the mixed powder, the solid solution of (Na,K)NbO$_{3}$ ceramics was obtained. The electrical properties such as the electromechanical coupling factors k$_{p}$ and k$_{33}$, the mechanical quality factor, Q$_{m}$, and the piezoelectric constant d$_{33}$ of the sintered (K,Na)NbO$_{3}$ ceramics were 0.32, 0.48, 71 (radial mode), 118 ((33)mode), and 107 pC/N, respectively. author: - first_name: Takafumi full_name: Maeda, Takafumi last_name: Maeda - first_name: Norihito full_name: Takiguchi, Norihito last_name: Takiguchi - first_name: Takeshi full_name: Morita, Takeshi last_name: Morita - first_name: Mutsuo full_name: Ishikawa, Mutsuo last_name: Ishikawa - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel citation: ama: Maeda T, Takiguchi N, Morita T, Ishikawa M, Hemsel T. (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders. Materials Letters. 2010;64(2):125-128. doi:10.1016/j.matlet.2009.10.012 apa: Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M., & Hemsel, T. (2010). (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders. Materials Letters, 64(2), 125–128. https://doi.org/10.1016/j.matlet.2009.10.012 bibtex: '@article{Maeda_Takiguchi_Morita_Ishikawa_Hemsel_2010, title={(K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders}, volume={64}, DOI={10.1016/j.matlet.2009.10.012}, number={2}, journal={Materials Letters}, author={Maeda, Takafumi and Takiguchi, Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Hemsel, Tobias}, year={2010}, pages={125–128} }' chicago: 'Maeda, Takafumi, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa, and Tobias Hemsel. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized from Hydrothermal Powders.” Materials Letters 64, no. 2 (2010): 125–28. https://doi.org/10.1016/j.matlet.2009.10.012.' ieee: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, and T. Hemsel, “(K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders,” Materials Letters, vol. 64, no. 2, pp. 125–128, 2010. mla: Maeda, Takafumi, et al. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized from Hydrothermal Powders.” Materials Letters, vol. 64, no. 2, 2010, pp. 125–28, doi:10.1016/j.matlet.2009.10.012. short: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, T. Hemsel, Materials Letters 64 (2010) 125–128. date_created: 2019-05-13T10:21:17Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.1016/j.matlet.2009.10.012 intvolume: ' 64' issue: '2' keyword: - Lead-free piezoelectric material - (K - Na)NbO$_{3}$ ceramics - Sintering solid solution - Piezoelectric properties language: - iso: eng page: 125-128 publication: Materials Letters publication_identifier: issn: - 1948-5719 quality_controlled: '1' status: public title: (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders type: journal_article user_id: '55222' volume: 64 year: '2010' ... --- _id: '9760' abstract: - lang: eng text: Self-optimizing systems are able to adapt their behavior autonomously according to their current self-determined objectives. Unforeseen influences could lead to dependability-critical behavior of the system. Methods are required which secure self-optimizing systems during operation. These methods to increase the dependability of the system should already be taken into consideration in the design process. This paper presents a guideline for the dependability-oriented design of self-optimizing systems, which integrates established classical methods like failure mode and effects analysis as well as methods based on self-optimization. On the one hand self-optimization is used to increase the dependability of the system by integrating objectives like safety, availability, and reliability to the objectives of the system. On the other hand methods are required to ensure the self-optimization itself. As basis for this guideline serves the principle solution of the system. The six phases of the guideline extend the design process and lead to an enhanced principle solution. Additionally, the guideline illustrates phases to implement and validate the self-optimizing system. The proposed guideline is applied to an innovative rail-bound vehicle, called RailCab, which is equipped with self-optimizing function modules. author: - first_name: Christoph full_name: Sondermann-Wölke, Christoph last_name: Sondermann-Wölke - first_name: Tobias full_name: Hemsel, Tobias id: '210' last_name: Hemsel - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro - first_name: Jürgen full_name: Gausemeier, Jürgen last_name: Gausemeier - first_name: Sebastian full_name: Pook, Sebastian last_name: Pook citation: ama: 'Sondermann-Wölke C, Hemsel T, Sextro W, Gausemeier J, Pook S. Guideline for the dependability-oriented design of self-optimizing systems. In: Industrial Informatics (INDIN), 2010 8th IEEE International Conference On. ; 2010:739-744. doi:10.1109/INDIN.2010.5549490' apa: Sondermann-Wölke, C., Hemsel, T., Sextro, W., Gausemeier, J., & Pook, S. (2010). Guideline for the dependability-oriented design of self-optimizing systems. In Industrial Informatics (INDIN), 2010 8th IEEE International Conference on (pp. 739–744). https://doi.org/10.1109/INDIN.2010.5549490 bibtex: '@inproceedings{Sondermann-Wölke_Hemsel_Sextro_Gausemeier_Pook_2010, title={Guideline for the dependability-oriented design of self-optimizing systems}, DOI={10.1109/INDIN.2010.5549490}, booktitle={Industrial Informatics (INDIN), 2010 8th IEEE International Conference on}, author={Sondermann-Wölke, Christoph and Hemsel, Tobias and Sextro, Walter and Gausemeier, Jürgen and Pook, Sebastian}, year={2010}, pages={739–744} }' chicago: Sondermann-Wölke, Christoph, Tobias Hemsel, Walter Sextro, Jürgen Gausemeier, and Sebastian Pook. “Guideline for the Dependability-Oriented Design of Self-Optimizing Systems.” In Industrial Informatics (INDIN), 2010 8th IEEE International Conference On, 739–44, 2010. https://doi.org/10.1109/INDIN.2010.5549490. ieee: C. Sondermann-Wölke, T. Hemsel, W. Sextro, J. Gausemeier, and S. Pook, “Guideline for the dependability-oriented design of self-optimizing systems,” in Industrial Informatics (INDIN), 2010 8th IEEE International Conference on, 2010, pp. 739–744. mla: Sondermann-Wölke, Christoph, et al. “Guideline for the Dependability-Oriented Design of Self-Optimizing Systems.” Industrial Informatics (INDIN), 2010 8th IEEE International Conference On, 2010, pp. 739–44, doi:10.1109/INDIN.2010.5549490. short: 'C. Sondermann-Wölke, T. Hemsel, W. Sextro, J. Gausemeier, S. Pook, in: Industrial Informatics (INDIN), 2010 8th IEEE International Conference On, 2010, pp. 739–744.' date_created: 2019-05-13T10:25:26Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.1109/INDIN.2010.5549490 keyword: - RailCab - dependability-critical behavior - dependability-oriented design - failure mode - rail-bound vehicle - secure self-optimizing systems - self-optimizing function modules - optimisation - railways - self-adjusting systems language: - iso: eng page: 739 -744 publication: Industrial Informatics (INDIN), 2010 8th IEEE International Conference on quality_controlled: '1' status: public title: Guideline for the dependability-oriented design of self-optimizing systems type: conference user_id: '55222' year: '2010' ... --- _id: '9761' abstract: - lang: eng text: New mechatronic systems, called self-optimizing systems, are able to adapt their behavior according to environmental, user and system specific influences. Self-optimizing systems are complex and due to their non-deterministic behavior comprise hidden risks, which cannot be foreseen in the design phase of the system. Therefore, modifications of the ISO 17359 condition monitoring policy for being able to cope with this new kind of systems are presented. Besides avoiding critical situations evoked by self-optimization, the proposed concept uses self-optimization to increase the dependability of the system. This concept is applied to the active guidance module of an innovative rail-bound vehicle. First test drives provide information for the enhancement of the implementation of realtime switching to appropriate control strategies. The different control strategies are investigated in detail. It is illustrated that influences on the system like different track sections or the desired velocity of the RailCab effect the system and can lead to a higher amount of flange contacts, which indicate higher wear and thus a reduction of the availability of the system. Therefore, these influences should be minded within the condition monitoring policy. Consequently, this article presents the condition monitoring policy for self-optimizing function modules and its application to the active railway guidance module. author: - first_name: Christoph full_name: Sondermann-Wölke, Christoph last_name: Sondermann-Wölke - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: Sondermann-Wölke C, Sextro W. Integration of Condition Monitoring in Self-optimizing Function Modules Applied to the Active Railway Guidance Module. International Journal On Advances in Intelligent Systems. 2010;3(1-3):65-74. apa: Sondermann-Wölke, C., & Sextro, W. (2010). Integration of Condition Monitoring in Self-optimizing Function Modules Applied to the Active Railway Guidance Module. International Journal On Advances in Intelligent Systems, 3(1–3), 65–74. bibtex: '@article{Sondermann-Wölke_Sextro_2010, title={Integration of Condition Monitoring in Self-optimizing Function Modules Applied to the Active Railway Guidance Module}, volume={3}, number={1–3}, journal={International Journal On Advances in Intelligent Systems}, author={Sondermann-Wölke, Christoph and Sextro, Walter}, year={2010}, pages={65–74} }' chicago: 'Sondermann-Wölke, Christoph, and Walter Sextro. “Integration of Condition Monitoring in Self-Optimizing Function Modules Applied to the Active Railway Guidance Module.” International Journal On Advances in Intelligent Systems 3, no. 1–3 (2010): 65–74.' ieee: C. Sondermann-Wölke and W. Sextro, “Integration of Condition Monitoring in Self-optimizing Function Modules Applied to the Active Railway Guidance Module,” International Journal On Advances in Intelligent Systems, vol. 3, no. 1–3, pp. 65–74, 2010. mla: Sondermann-Wölke, Christoph, and Walter Sextro. “Integration of Condition Monitoring in Self-Optimizing Function Modules Applied to the Active Railway Guidance Module.” International Journal On Advances in Intelligent Systems, vol. 3, no. 1–3, 2010, pp. 65–74. short: C. Sondermann-Wölke, W. Sextro, International Journal On Advances in Intelligent Systems 3 (2010) 65–74. date_created: 2019-05-13T10:27:02Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' intvolume: ' 3' issue: 1 - 3 keyword: - dependability - condition monitoring - selfoptimization - active railway guidance module language: - iso: eng page: 65 - 74 publication: International Journal On Advances in Intelligent Systems quality_controlled: '1' status: public title: Integration of Condition Monitoring in Self-optimizing Function Modules Applied to the Active Railway Guidance Module type: journal_article user_id: '55222' volume: 3 year: '2010' ... --- _id: '9762' abstract: - lang: eng text: Die erweiterten Möglichkeiten der Informationsverarbeitung mechatronischer Systeme erlauben es, mechatronische Systeme selbstoptimierend zu gestalten. Dabei bezieht sich die Selbstoptimierung auf die Fähigkeit des Systems, sich an die aktuelle Umfeldsituation anzupassen; wobei das System im Allgemeinen mehrere relevante Ziele verfolgt. Wurde eine Umfeldveränderung bemerkt, so müssen diese Ziele an die neue Situation angepasst und das resultierende Verhalten ausgewählt werden. In diesem Beitrag wird das selbstoptimierende Spurführungsmodul näher untersucht. Das Spurführungsmodul ist Bestandteil eines innovativen schienengebundenen Verkehrssystems, genannt RailCab, und dient zur Lenkung des einzelnen Fahrzeugs. Ziele des Spurführungsmoduls bestehen darin, die Verlässlichkeit des Spurführungsmoduls zu erhöhen sowie möglichst wenig Energie zu verbrauchen. Um kritische Systemzustände zu erkennen bzw. frühzeitig zu verhindern wird eine Vorgehensweise zur Einrichtung einer Zustandsüberwachung für selbstoptimierende Systeme beschrieben. Diese wird auf dem realen Versuchsträger im Maßstab 1:2,5 implementiert. Die Auswertung von Versuchsfahrten zeigt, dass gerade beim Auftreten eines Fehlers das Umschalten vom Ziel ''Energieverbrauch minimieren`` auf das Ziel ''Verlässlichkeit maximieren`` sinnvoll ist. author: - first_name: Christoph full_name: Sondermann-Wölke, Christoph last_name: Sondermann-Wölke - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro - first_name: Jens full_name: Geisler, Jens last_name: Geisler - first_name: Ansgar full_name: Trächtler, Ansgar last_name: Trächtler citation: ama: 'Sondermann-Wölke C, Sextro W, Geisler J, Trächtler A. Experimentelle Untersuchung der Selbstoptimierung innerhalb des RailCab-Spurführungsmoduls. In: Gausemeier J, Rammig FJ, Trächtler A, eds. Entwurf Mechatronischer Systeme. Vol 272. HNI-Verlagsschriftenreihe. Paderborn; 2010:411-420.' apa: Sondermann-Wölke, C., Sextro, W., Geisler, J., & Trächtler, A. (2010). Experimentelle Untersuchung der Selbstoptimierung innerhalb des RailCab-Spurführungsmoduls. In J. Gausemeier, F. J. Rammig, & A. Trächtler (Eds.), Entwurf mechatronischer Systeme (Vol. 272, pp. 411–420). Paderborn. bibtex: '@inproceedings{Sondermann-Wölke_Sextro_Geisler_Trächtler_2010, place={Paderborn}, series={HNI-Verlagsschriftenreihe}, title={Experimentelle Untersuchung der Selbstoptimierung innerhalb des RailCab-Spurführungsmoduls}, volume={272}, booktitle={Entwurf mechatronischer Systeme}, author={Sondermann-Wölke, Christoph and Sextro, Walter and Geisler, Jens and Trächtler, Ansgar}, editor={Gausemeier, Jürgen and Rammig, Frans Josef and Trächtler, AnsgarEditors}, year={2010}, pages={411–420}, collection={HNI-Verlagsschriftenreihe} }' chicago: Sondermann-Wölke, Christoph, Walter Sextro, Jens Geisler, and Ansgar Trächtler. “Experimentelle Untersuchung Der Selbstoptimierung Innerhalb Des RailCab-Spurführungsmoduls.” In Entwurf Mechatronischer Systeme, edited by Jürgen Gausemeier, Frans Josef Rammig, and Ansgar Trächtler, 272:411–20. HNI-Verlagsschriftenreihe. Paderborn, 2010. ieee: C. Sondermann-Wölke, W. Sextro, J. Geisler, and A. Trächtler, “Experimentelle Untersuchung der Selbstoptimierung innerhalb des RailCab-Spurführungsmoduls,” in Entwurf mechatronischer Systeme, 2010, vol. 272, pp. 411–420. mla: Sondermann-Wölke, Christoph, et al. “Experimentelle Untersuchung Der Selbstoptimierung Innerhalb Des RailCab-Spurführungsmoduls.” Entwurf Mechatronischer Systeme, edited by Jürgen Gausemeier et al., vol. 272, 2010, pp. 411–20. short: 'C. Sondermann-Wölke, W. Sextro, J. Geisler, A. Trächtler, in: J. Gausemeier, F.J. Rammig, A. Trächtler (Eds.), Entwurf Mechatronischer Systeme, Paderborn, 2010, pp. 411–420.' date_created: 2019-05-13T10:28:04Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' editor: - first_name: Jürgen full_name: Gausemeier, Jürgen last_name: Gausemeier - first_name: Frans Josef full_name: Rammig, Frans Josef last_name: Rammig - first_name: Ansgar full_name: Trächtler, Ansgar last_name: Trächtler intvolume: ' 272' keyword: - Selbstoptimierung - Spurführungsmodul language: - iso: eng page: 411 - 420 place: Paderborn publication: Entwurf mechatronischer Systeme quality_controlled: '1' series_title: HNI-Verlagsschriftenreihe status: public title: Experimentelle Untersuchung der Selbstoptimierung innerhalb des RailCab-Spurführungsmoduls type: conference user_id: '55222' volume: 272 year: '2010' ... --- _id: '9763' abstract: - lang: eng text: Recent advances in information processing enable new kinds of technical systems, called self-optimizing systems. These systems are able to adapt their objectives and their behavior according to the current situation and influences autonomously. This behavior adaptation is non-deterministic and hence self-optimization is a risk to the system, e.g. if the result of the self-optimization process does not match the suddenly changed situation. In contrary, self-optimization could be used to increase the dependability by pursuing objectives like reliability and availability. In our preceding publications we introduced the so called multi-level dependability concept to cope with this new kind of systems (cf. [6]). This concept comprises the monitoring of the system behavior, the classification of the current situation, and the selection of the appropriate measure, if reliability limits are exceeded. In this paper we present for the first time experimental results. The dependability concept is implemented in the self-optimizing active guidance system of a railway vehicle. The test drives illustrate clearly that the proposed concept is able to cope with, e.g., sensor failures, and is able to increase the reliability and availability of the active guidance module. author: - first_name: Christoph full_name: Sondermann-Wölke, Christoph last_name: Sondermann-Wölke - first_name: Jens full_name: Geisler, Jens last_name: Geisler - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro citation: ama: 'Sondermann-Wölke C, Geisler J, Sextro W. Increasing the reliability of a self-optimizing railway guidance system. In: Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual. ; 2010:1-6. doi:10.1109/RAMS.2010.5448080' apa: Sondermann-Wölke, C., Geisler, J., & Sextro, W. (2010). Increasing the reliability of a self-optimizing railway guidance system. In Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual (pp. 1–6). https://doi.org/10.1109/RAMS.2010.5448080 bibtex: '@inproceedings{Sondermann-Wölke_Geisler_Sextro_2010, title={Increasing the reliability of a self-optimizing railway guidance system}, DOI={10.1109/RAMS.2010.5448080}, booktitle={Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual}, author={Sondermann-Wölke, Christoph and Geisler, Jens and Sextro, Walter}, year={2010}, pages={1–6} }' chicago: Sondermann-Wölke, Christoph, Jens Geisler, and Walter Sextro. “Increasing the Reliability of a Self-Optimizing Railway Guidance System.” In Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual, 1–6, 2010. https://doi.org/10.1109/RAMS.2010.5448080. ieee: C. Sondermann-Wölke, J. Geisler, and W. Sextro, “Increasing the reliability of a self-optimizing railway guidance system,” in Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual, 2010, pp. 1–6. mla: Sondermann-Wölke, Christoph, et al. “Increasing the Reliability of a Self-Optimizing Railway Guidance System.” Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual, 2010, pp. 1–6, doi:10.1109/RAMS.2010.5448080. short: 'C. Sondermann-Wölke, J. Geisler, W. Sextro, in: Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual, 2010, pp. 1–6.' date_created: 2019-05-13T10:35:39Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' doi: 10.1109/RAMS.2010.5448080 keyword: - availability - dependability concept - multilevel dependability concept - railway vehicle - reliability - self optimizing active guidance system - self optimizing railway guidance system - situation classification - system behavior monitoring - optimal control - railways - reliability theory - self-adjusting systems language: - iso: eng page: 1 -6 publication: Reliability and Maintainability Symposium (RAMS), 2010 Proceedings - Annual publication_identifier: issn: - 0149-144X quality_controlled: '1' status: public title: Increasing the reliability of a self-optimizing railway guidance system type: conference user_id: '55222' year: '2010' ... --- _id: '9764' author: - first_name: Christoph full_name: Tomberger, Christoph last_name: Tomberger - first_name: Peter full_name: Dietmaier, Peter last_name: Dietmaier - first_name: Rosenberger full_name: Martin, Rosenberger last_name: Martin - first_name: Walter full_name: Sextro, Walter id: '21220' last_name: Sextro - first_name: Klaus full_name: Six, Klaus last_name: Six citation: ama: Tomberger C, Dietmaier P, Martin R, Sextro W, Six K. Einfluss von Oberflächenrauheit, fluiden Zwischenschichten und Kontakttemperaturen auf den Kraftschluss zwischen Rad und Schiene. ZEVrail. 2010;134:127-135. apa: Tomberger, C., Dietmaier, P., Martin, R., Sextro, W., & Six, K. (2010). Einfluss von Oberflächenrauheit, fluiden Zwischenschichten und Kontakttemperaturen auf den Kraftschluss zwischen Rad und Schiene. ZEVrail, 134, 127–135. bibtex: '@article{Tomberger_Dietmaier_Martin_Sextro_Six_2010, title={Einfluss von Oberflächenrauheit, fluiden Zwischenschichten und Kontakttemperaturen auf den Kraftschluss zwischen Rad und Schiene}, volume={134}, journal={ZEVrail}, author={Tomberger, Christoph and Dietmaier, Peter and Martin, Rosenberger and Sextro, Walter and Six, Klaus}, year={2010}, pages={127–135} }' chicago: 'Tomberger, Christoph, Peter Dietmaier, Rosenberger Martin, Walter Sextro, and Klaus Six. “Einfluss von Oberflächenrauheit, Fluiden Zwischenschichten Und Kontakttemperaturen Auf Den Kraftschluss Zwischen Rad Und Schiene.” ZEVrail 134 (2010): 127–35.' ieee: C. Tomberger, P. Dietmaier, R. Martin, W. Sextro, and K. Six, “Einfluss von Oberflächenrauheit, fluiden Zwischenschichten und Kontakttemperaturen auf den Kraftschluss zwischen Rad und Schiene,” ZEVrail, vol. 134, pp. 127–135, 2010. mla: Tomberger, Christoph, et al. “Einfluss von Oberflächenrauheit, Fluiden Zwischenschichten Und Kontakttemperaturen Auf Den Kraftschluss Zwischen Rad Und Schiene.” ZEVrail, vol. 134, 2010, pp. 127–35. short: C. Tomberger, P. Dietmaier, R. Martin, W. Sextro, K. Six, ZEVrail 134 (2010) 127–135. date_created: 2019-05-13T10:37:07Z date_updated: 2022-01-06T07:04:19Z department: - _id: '151' intvolume: ' 134' language: - iso: eng page: 127-135 publication: ZEVrail publication_identifier: issn: - 0043-1648 status: public title: Einfluss von Oberflächenrauheit, fluiden Zwischenschichten und Kontakttemperaturen auf den Kraftschluss zwischen Rad und Schiene type: journal_article user_id: '55222' volume: 134 year: '2010' ... --- _id: '4129' abstract: - lang: eng text: We study a single quantum dot molecule doped with one electron in the presence of electron-phonon coupling. Both diagonal and off-diagonal interactions representing real and virtual processes with acoustic phonons via deformation potential and piezoelectric coupling are taken into account. We employ a non-perturbative quantum kinetic theory and show that the phonon-mediated relaxation is dominated by an electron tunneling on a picosecond time scale.A dependence of the relaxation on the temperature and the strength of the tunneling coupling is analyzed. article_number: '012035' article_type: original author: - first_name: Anna full_name: Grodecka-Grad, Anna last_name: Grodecka-Grad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: 'Grodecka-Grad A, Förstner J. Phonon-mediated relaxation in doped quantum dot molecules. Journal of Physics: Conference Series. 2010;245. doi:10.1088/1742-6596/245/1/012035' apa: 'Grodecka-Grad, A., & Förstner, J. (2010). Phonon-mediated relaxation in doped quantum dot molecules. Journal of Physics: Conference Series, 245. https://doi.org/10.1088/1742-6596/245/1/012035' bibtex: '@article{Grodecka-Grad_Förstner_2010, title={Phonon-mediated relaxation in doped quantum dot molecules}, volume={245}, DOI={10.1088/1742-6596/245/1/012035}, number={012035}, journal={Journal of Physics: Conference Series}, publisher={IOP Publishing}, author={Grodecka-Grad, Anna and Förstner, Jens}, year={2010} }' chicago: 'Grodecka-Grad, Anna, and Jens Förstner. “Phonon-Mediated Relaxation in Doped Quantum Dot Molecules.” Journal of Physics: Conference Series 245 (2010). https://doi.org/10.1088/1742-6596/245/1/012035.' ieee: 'A. Grodecka-Grad and J. Förstner, “Phonon-mediated relaxation in doped quantum dot molecules,” Journal of Physics: Conference Series, vol. 245, 2010.' mla: 'Grodecka-Grad, Anna, and Jens Förstner. “Phonon-Mediated Relaxation in Doped Quantum Dot Molecules.” Journal of Physics: Conference Series, vol. 245, 012035, IOP Publishing, 2010, doi:10.1088/1742-6596/245/1/012035.' short: 'A. Grodecka-Grad, J. Förstner, Journal of Physics: Conference Series 245 (2010).' date_created: 2018-08-27T10:33:04Z date_updated: 2022-01-06T07:00:22Z ddc: - '530' department: - _id: '15' doi: 10.1088/1742-6596/245/1/012035 file: - access_level: closed content_type: application/pdf creator: hclaudia date_created: 2018-08-27T10:34:26Z date_updated: 2018-08-27T10:34:26Z file_id: '4130' file_name: 2010 Grodecka-Grad,Förstner_Phonon-mediated relaxation in doped quantum dot molecules.pdf file_size: 896613 relation: main_file success: 1 file_date_updated: 2018-08-27T10:34:26Z has_accepted_license: '1' intvolume: ' 245' keyword: - tet_topic_qd language: - iso: eng publication: 'Journal of Physics: Conference Series' publication_identifier: issn: - 1742-6596 publication_status: published publisher: IOP Publishing status: public title: Phonon-mediated relaxation in doped quantum dot molecules type: journal_article user_id: '55706' volume: 245 year: '2010' ... --- _id: '4144' abstract: - lang: eng text: "Non-polar relaxed cubic GaN was grown by molecular beam epitaxy (MBE) on nano-patterned 3C-SiC/Si \r\n(0 0 1)substrates with negligible hexagonal content and less defect density than in planar cubic GaN layers.Nano-patterning of 3C-SiC/Si(001) is achieved by self-ordered colloidal masks for the first time. The method presented here offers the possibility to create nano-patterned cubic GaN without the need for a GaN etching process andt hus isa potential alternative to the conventional top–down fabrication techniques." article_type: original author: - first_name: R.M. full_name: Kemper, R.M. last_name: Kemper - first_name: M. full_name: Weinl, M. last_name: Weinl - first_name: C. full_name: Mietze, C. last_name: Mietze - first_name: M. full_name: Häberlen, M. last_name: Häberlen - first_name: T. full_name: Schupp, T. last_name: Schupp - first_name: E. full_name: Tschumak, E. last_name: Tschumak - first_name: Jörg full_name: Lindner, Jörg id: '20797' last_name: Lindner - first_name: K. full_name: Lischka, K. last_name: Lischka - first_name: 'Donald ' full_name: 'As, Donald ' last_name: As citation: ama: Kemper RM, Weinl M, Mietze C, et al. Growth of cubic GaN on nano-patterned 3C-SiC/Si (001) substrates. Journal of Crystal Growth. 2010;323(1):84-87. doi:10.1016/j.jcrysgro.2010.12.042 apa: Kemper, R. M., Weinl, M., Mietze, C., Häberlen, M., Schupp, T., Tschumak, E., … As, D. (2010). Growth of cubic GaN on nano-patterned 3C-SiC/Si (001) substrates. Journal of Crystal Growth, 323(1), 84–87. https://doi.org/10.1016/j.jcrysgro.2010.12.042 bibtex: '@article{Kemper_Weinl_Mietze_Häberlen_Schupp_Tschumak_Lindner_Lischka_As_2010, title={Growth of cubic GaN on nano-patterned 3C-SiC/Si (001) substrates}, volume={323}, DOI={10.1016/j.jcrysgro.2010.12.042}, number={1}, journal={Journal of Crystal Growth}, publisher={Elsevier BV}, author={Kemper, R.M. and Weinl, M. and Mietze, C. and Häberlen, M. and Schupp, T. and Tschumak, E. and Lindner, Jörg and Lischka, K. and As, Donald }, year={2010}, pages={84–87} }' chicago: 'Kemper, R.M., M. Weinl, C. Mietze, M. Häberlen, T. Schupp, E. Tschumak, Jörg Lindner, K. Lischka, and Donald As. “Growth of Cubic GaN on Nano-Patterned 3C-SiC/Si (001) Substrates.” Journal of Crystal Growth 323, no. 1 (2010): 84–87. https://doi.org/10.1016/j.jcrysgro.2010.12.042.' ieee: R. M. Kemper et al., “Growth of cubic GaN on nano-patterned 3C-SiC/Si (001) substrates,” Journal of Crystal Growth, vol. 323, no. 1, pp. 84–87, 2010. mla: Kemper, R. M., et al. “Growth of Cubic GaN on Nano-Patterned 3C-SiC/Si (001) Substrates.” Journal of Crystal Growth, vol. 323, no. 1, Elsevier BV, 2010, pp. 84–87, doi:10.1016/j.jcrysgro.2010.12.042. short: R.M. Kemper, M. Weinl, C. Mietze, M. Häberlen, T. Schupp, E. Tschumak, J. Lindner, K. Lischka, D. As, Journal of Crystal Growth 323 (2010) 84–87. date_created: 2018-08-27T12:34:33Z date_updated: 2022-01-06T07:00:24Z ddc: - '530' department: - _id: '15' - _id: '286' doi: 10.1016/j.jcrysgro.2010.12.042 file: - access_level: closed content_type: application/pdf creator: hclaudia date_created: 2018-08-27T12:35:32Z date_updated: 2018-08-27T12:35:32Z file_id: '4145' file_name: Growth of cubic GaN on nano-patterned 3C-SiC (001) substrates.pdf file_size: 665964 relation: main_file success: 1 file_date_updated: 2018-08-27T12:35:32Z has_accepted_license: '1' intvolume: ' 323' issue: '1' language: - iso: eng page: 84-87 publication: Journal of Crystal Growth publication_identifier: issn: - 0022-0248 publication_status: published publisher: Elsevier BV status: public title: Growth of cubic GaN on nano-patterned 3C-SiC/Si (001) substrates type: journal_article user_id: '55706' volume: 323 year: '2010' ... --- _id: '4153' abstract: - lang: eng text: Nanosphere lithography (NSL) masks consisting of mono- or double-layers of polystyrene (PS) nano-beads are fabricated on silicon exploiting the self-organization of PS particles during the controlled drying of a colloidal suspension on a surface. The shape changes and shrinkage of PS sphere masks upon treatment in an air plasma are studied as a function of initial sphere size, plasma power and treatment time. The influence of several experimental parameters, including the plasma induced temperature rise, are analysed using scanning and transmission electron microscopy. It is demonstrated that a variety of new intriguing nanopatterns can be generated on silicon surfaces by the combination of NSL and plasma techniques, largely broadening the variety of patterns available so far by NSL. article_type: original author: - first_name: D. full_name: Gogel, D. last_name: Gogel - first_name: M. full_name: Weinl, M. last_name: Weinl - first_name: Jörg full_name: Lindner, Jörg id: '20797' last_name: Lindner - first_name: B. full_name: Stritzker, B. last_name: Stritzker citation: ama: Gogel D, Weinl M, Lindner J, Stritzker B. Plasma modification of nanosphere lithography masks made of polystyrene beads. JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS. 2010;12(3):740-744. apa: Gogel, D., Weinl, M., Lindner, J., & Stritzker, B. (2010). Plasma modification of nanosphere lithography masks made of polystyrene beads. JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 12(3), 740–744. bibtex: '@article{Gogel_Weinl_Lindner_Stritzker_2010, title={Plasma modification of nanosphere lithography masks made of polystyrene beads}, volume={12}, number={3}, journal={JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS}, author={Gogel, D. and Weinl, M. and Lindner, Jörg and Stritzker, B.}, year={2010}, pages={740–744} }' chicago: 'Gogel, D., M. Weinl, Jörg Lindner, and B. Stritzker. “Plasma Modification of Nanosphere Lithography Masks Made of Polystyrene Beads.” JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS 12, no. 3 (2010): 740–44.' ieee: D. Gogel, M. Weinl, J. Lindner, and B. Stritzker, “Plasma modification of nanosphere lithography masks made of polystyrene beads,” JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, vol. 12, no. 3, pp. 740–744, 2010. mla: Gogel, D., et al. “Plasma Modification of Nanosphere Lithography Masks Made of Polystyrene Beads.” JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, vol. 12, no. 3, 2010, pp. 740–44. short: D. Gogel, M. Weinl, J. Lindner, B. Stritzker, JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS 12 (2010) 740–744. date_created: 2018-08-27T13:29:28Z date_updated: 2022-01-06T07:00:26Z department: - _id: '286' - _id: '230' intvolume: ' 12' issue: '3' language: - iso: eng page: 740-744 publication: JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS status: public title: Plasma modification of nanosphere lithography masks made of polystyrene beads type: journal_article user_id: '55706' volume: 12 year: '2010' ...