@article{23205, author = {{Reinold, Peter and Nachtigal, Vitalij and Trächtler, Ansgar}}, journal = {{Proc. 6th IFAC Symposium on Advances in Automotive Control AAC}}, title = {{{An Advanced Electric Vehicle for the Development and Test of New Vehicle-Dynamics Control Strategies}}}, year = {{2010}}, } @article{23206, author = {{Amelunxen, Hendrik and Trächtler, Ansgar and Haupt, Hagen and Schütte, Herbert}}, journal = {{Proc. 10th International Symposium on Advanced Vehicle Control (AVEC 2010)}}, title = {{{Generation of Extended Vehicle-dynamics Models for Real-time Simulations}}}, year = {{2010}}, } @article{23207, author = {{Gausemeier, Sandra and Jäker, Karl-Peter and Trächtler, Ansgar}}, journal = {{Proc. 6th IFAC Symposium on Advances in Automotive Control AAC}}, title = {{{Multi-objective Optimization of a Vehicle Velocity Profile by Means of Dynamic Programming}}}, year = {{2010}}, } @inproceedings{23208, author = {{Krüger, Martin and Scharfenbaum, Ingo and Trächtler, Ansgar}}, booktitle = {{7. Paderborner Workshop Entwurf mechatronischer Systeme}}, number = {{272}}, pages = {{203--218}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Parametrische Modellreduktion in hierarchisch modellierten selbstoptimierenden Systemen}}}, year = {{2010}}, } @article{23209, author = {{Reinold, Peter and Sawazki, Egor and Trächtler, Ansgar}}, journal = {{10. Internationales Stuttgarter Symposium}}, title = {{{Integrated Vehicle Dynamics Control of an Electric Vehicle with Single-wheel Chassis Actuators}}}, year = {{2010}}, } @inproceedings{23210, author = {{Just, Viktor and Cinkaya, Hueseyin and Trächtler, Ansgar}}, booktitle = {{7. Paderborner Workshop: "Entwurf mechatronischer Systeme"}}, pages = {{329--339}}, publisher = {{Heinz Nixdorf Institut, Universität Paderborn}}, title = {{{Entwurf einer adaptiven Regelung für den Vereinzelungsvorgang in Bankautomaten }}}, volume = {{272}}, year = {{2010}}, } @article{23211, author = {{Geisler, Jens and Sextro, Walter and Sondermann-Wölke, Christoph and Trächtler, Ansgar}}, journal = {{7. Paderborner Workshop Entwurf mechatronischer Systeme (EMS 2010)}}, title = {{{Experimentelle Untersuchung der Selbstoptimierung innerhalb des RailCab-Spurführungsmoduls}}}, year = {{2010}}, } @inproceedings{23212, author = {{Ferrari, Remo and Sudmann, Oliver and Henke, Christian and Geisler, Jens and Schäfer, Wilhelm and Madhavji, Nazim H.}}, booktitle = {{Proceedings of 18th IEEE International Requirements Engineering Conference (RE2010), Sydney, Australia}}, pages = {{79--88}}, publisher = {{IEEE Computer Society, Los Alamitos, CA, USA}}, title = {{{Requirements Engineering Decisions in the Context of an Existing Architecture: A Case Study of a Prototypical Project}}}, year = {{2010}}, } @inproceedings{23213, author = {{Ferrari, Remo and Sudmann, Oliver and Henke, Christian and Geisler, Jens and Schäfer, Wilhelm and Madhavji, Nazim H.}}, booktitle = {{1st International Workshop on Replication in Empirical Software Engineering Research (co-located with ICSE 2010), Cape Town, South Africa}}, title = {{{Transitioning from lab studies to large-scale studies: Emerging results from a literal replication}}}, year = {{2010}}, } @inproceedings{23214, author = {{Schäfer, Wilhelm and Birattari, Mauro and Blömer, Johannes and Dorigo, Marco and Engels, Gregor and O'Grady, Rehan and Platzner, Marco and Rammig, Franz-Josef and Reif, Wolfgang and Trächtler, Ansgar}}, booktitle = {{Proceedings of the Foundations of Software Engineering (FSE) and NITR&D/SPD Working Conference on the Future of Software Engineering Research (FoSER 2010)}}, pages = {{321--324}}, title = {{{Engineering Self-Coordinating Software Intensive Systems}}}, year = {{2010}}, } @inproceedings{23215, author = {{Ferrari, Remo and Sudmann, Oliver and Henke, Christian and Geisler, Jens and Schäfer, Wilhelm and Madhavji, Nazim H.}}, booktitle = {{Requirements Engineering: Foundation for Software Quality (REFSQ2010), Essen, Germany}}, pages = {{23--29}}, publisher = {{Springer Berlin / Heidelberg}}, title = {{{Requirements and Systems Architecture Interaction in a Prototypical Project: Emerging Results}}}, volume = {{6182}}, year = {{2010}}, } @article{4548, abstract = {{A fluorescence study of acetonitrile solutions of bis(tetramethylguanidine)propane, copper(I)-iodide and [Cu(btmgp)I] was performed and the chemical reaction of the latter species with O2 was investigated at room temperature. The actual quenching process via O2 gassing was studied and an exponential dependence of the fluorescence intensity with respect to the complex concentration was observed. Furthermore the survey was deepened on time resolved fluorescence properties of solved [Cu(btmgp)I] in a wider concentration range. The applicability of this complex for O2 sensing inside a microreactor system was proven by confocal fluorescence measurements. It was shown that the investigated system can be used for oxygen sensing in the copper concentration range from 10−2 to 10−9 mol/l.}}, author = {{Herres-Pawlis, Sonja and Berth, Gerhard and Wiedemeier, Volker and Schmidt, Ludger and Zrenner, Artur and Warnecke, Hans-Joachim}}, issn = {{0022-2313}}, journal = {{Journal of Luminescence}}, keywords = {{Copper Oxygen Fluorescence quenching N donor ligands}}, number = {{10}}, pages = {{1958--1962}}, publisher = {{Elsevier BV}}, title = {{{Oxygen sensing by fluorescence quenching of [Cu(btmgp)I]}}}, doi = {{10.1016/j.jlumin.2010.05.012}}, volume = {{130}}, year = {{2010}}, } @article{9743, abstract = {{The hydrothermal method enables the production of high-quality piezoelectric materials. In this study, we propose to irradiate the reaction solutions with ultrasonic power during the hydrothermal method to obtain a shorter reaction time and a smooth film surface. A high-pressure reaction container for the ultrasonic transducer was newly developed, and the ultrasonically-assisted hydrothermal method was examined by using this container. The effect of ultrasonic assist on the synthesis of lead-zirconate-titanate (PZT) thin films and (K,Na)NbO$_{3}$ powders was verified. Thicker PZT film, thickness around 10 ${\mu}$m, could be obtained in one process, and (K,Na)NbO$_{3}$ powder was synthesized in half the previous reaction time.}}, author = {{Ageba, Ryo and Kadota, Yoichi and Maeda, Takafumi and Takiguchi, Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Bornmann, Peter and Hemsel, Tobias}}, issn = {{1948-5719}}, journal = {{Journal of Korean Physical Society}}, keywords = {{Hydrothermal method, High-power ultrasonic, PZT thin film, Lead-free piezoelectric materials}}, number = {{4}}, pages = {{918--923}}, title = {{{Ultrasonically-assisted Hydrothermal Method for Ferroelectric Material Synthesis}}}, doi = {{10.3938/jkps.57.918}}, volume = {{57}}, year = {{2010}}, } @article{9744, abstract = {{Direct ultrasound irradiation is advantageous to increase the efficiency of the hydrothermal method which can be used for the production of piezoelectric thin films and lead free piezoelectric ceramics. To apply ultrasound directly to the process transducer prototypes were developed regarding the boundary conditions of the hydrothermal method. LiNbO$_{3}$ and PIC 181 were proven as feasible materials for high temperature resistant transducers ($\geq 200^\circ C$). Resistance of the transducers horn against the corrosive mineralizer was achieved by using Hastelloy C-22. The efficiency of the ultrasound assisted hydrothermal method depends on the generated sound field. Impedance and sound field measurements have shown that the sound field depends on the filling level and the position and design of the transducer.}}, author = {{Bornmann, Peter and Hemsel, Tobias and Littmann, Walter and Ageba, Ryo and Kadota, Yoishi and Morita, Takeshi}}, issn = {{1948-5719}}, journal = {{Journal of Korean Physical Society}}, keywords = {{High-temperature transducer, Hydrothermal method, Lithium-niobate transducer}}, number = {{4}}, pages = {{1122}}, title = {{{Ultrasonic Transducer for the Hydrothermal Method}}}, doi = {{10.3938/jkps.57.1122}}, volume = {{57}}, year = {{2010}}, } @article{9745, abstract = {{In the modeling of piezoelectric Langevin transducers using usual transfer matrix methods, some simplifications have been adopted. This leads to reduction of the model quality. A mixed transfer matrix method is employed in the modeling of Langevin transducers, where the pre-stressed bolt is modeled as a separate four-pole element, which is connected to other elements in parallel. Based on the mixed transfer matrix method, the four (six)-pole element description of the piezoelectric Langevin transducer is built up and the total transfer matrix relation is derived. The resonance frequencies of the transducer are calculated and then measured using the impedance analyzer (HP4192). Experimental result shows that the mixed transfer matrix method has better modeling quality than the usual transfer matrix method for the vibration analysis of piezoelectric Langevin transducers.}}, author = {{Fu, Bo and Li, Chao and Zhang, Jianming and Huang, Zhenwei and Hemsel, Tobias}}, issn = {{1948-5719}}, journal = {{Journal of Korean Physical Society}}, keywords = {{Piezoelectric langevin transducer, Transfer matrix method, Four (six)-pole element description, Pre-stressed bolt}}, number = {{4}}, pages = {{929}}, title = {{{Modeling of Piezoelectric Langevin Transducers by Using Mixed Transfer Matrix Methods}}}, doi = {{10.3938/jkps.57.929}}, volume = {{57}}, year = {{2010}}, } @article{9747, abstract = {{Bei der Konstruktion von Maschinen ist es oftmals erforderlich, Schwingungen minimal zu halten. Um z.B. die Lebensdauer zu erhöhen, Material einzusparen oder den Geräuschpegel gering zu halten muss oft ein großer Aufwand zur Dämpfung von auftretenden Schwingungen betrieben werden. In vielen technischen Anwendungen werden Einzelteile miteinander verschraubt. Diese Fügestellen können gezielt und mit wenig Aufwand zur Schwingungsdämpfung herangezogen werden. Die Berechnung des dynamischen Verhaltens verschraubter Strukturen stellt immer noch eine Herausforderung dar. Es wurde eine Methode entwickelt, um den eingeschwungenen Zustand elastischer, miteinander verschraubter Körper mit rauen Fügestellen bei periodischer Anregung zu berechnen. Als Basis dienen Finite Elemente Modelle der einzelnen Teile, deren Freiheitsgrade durch modale Kondensation reduziert werden. Unter Anwendung des Verfahrens von Ritz und Galerkin wird eine Näherungslösung für den eingeschwungenen Zustand des nichtlinearen, gekoppelten Systems ermittelt. Abhängig von den Schraubenvorspannkräften sowie den bestimmenden Parametern der Kontaktflächen, Rautiefe und Reibungskoeffizient, kann die Systemantwort berechnet und optimiert werden. Um die Berechnungsmethode zu verifizieren wurden Experimente durchgeführt. Der Vergleich zwischen Messung und Rechnung zeigt eine gute Übereinstimmung. ({\copyright} 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)}}, author = {{Hölzl, Johannes Sebastian and Sextro, Walter}}, issn = {{1617-7061}}, journal = {{PAMM}}, number = {{1}}, pages = {{247--248}}, publisher = {{WILEY-VCH Verlag}}, title = {{{Reibungsdämpfung in ausgedehnten, verschraubten Fügestellen}}}, doi = {{10.1002/pamm.201010116}}, volume = {{10}}, year = {{2010}}, } @article{9748, abstract = {{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 = {{ Hölzl, Johannes Sebastian and Sextro, Walter}}, journal = {{SAE International Journal of Passenger Cars- Mechanical Systems}}, keywords = {{Automotive}}, pages = {{929--935}}, title = {{{Simulation of the Dynamical Behavior of Elastic Multi-Body Systems with Bolted, Rough Contact Interfaces}}}, doi = {{10.4271/2010-01-1422}}, year = {{2010}}, } @article{9749, abstract = {{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 = {{Hemsel, Tobias and Lierk, Ernst Günther and Littmann, Walter and Morita, Takeshi}}, issn = {{1948-5719}}, journal = {{Journal of Korean Physical Society}}, keywords = {{Bolted Langevin transducer, Optimum placement of piezoelectric ceramics}}, number = {{4}}, pages = {{933--937}}, title = {{{Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers}}}, doi = {{10.3938/jkps.57.933}}, volume = {{57}}, year = {{2010}}, } @article{9750, author = {{Hess, D. and Hüfner, Thorsten and Hesse, Tobias and Sondermann-Wölke, Christoph and Sattel, Thomas}}, journal = {{Internationales Mechatronik-Kolloquium "Mechatronik 2010"}}, title = {{{Intelligente mechatronische Systeme zur automatisierten Fahrzeugführung in Fahrerassistenzsystemen}}}, year = {{2010}}, } @article{9751, abstract = {{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 = {{Hunstig, Matthias and Hemsel, Tobias}}, issn = {{1948-5719}}, journal = {{Journal of Korean Physical Society}}, number = {{4}}, pages = {{938--941}}, title = {{{Drive Signals for Maximizing the Velocity of Piezoelectric Inertia Motors}}}, doi = {{10.3938/jkps.57.938}}, volume = {{57}}, year = {{2010}}, }