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- Al-Tashi, Mohammed, et al.
(author)
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Classroom-ready open-source educational exoskeleton for biomedical and control engineering
- 2024
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In: Automatisierungstechnik. - 0178-2312. ; 72:5, s. 460-475
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Journal article (peer-reviewed)abstract
- In recent years, robotic arm exoskeletons have emerged as promising tools, finding widespread application in the rehabilitation of neurological disorders and as assistive devices for everyday activities, even alleviating the physical strain on labor-intensive tasks. Despite the growing prominence of exoskeletons in everyday life, a notable knowledge gap exists in the availability of open-source platforms for classroom-ready usage in educational settings. To address this deficiency, we introduce an open-source educational exoskeleton platform aimed at Science, Technology, Engineering, and Mathematics (STEM) education. This platform represents an enhancement of the commercial EduExo Pro by AUXIVO, tailored to serve as an educational resource for control engineering and biomedical engineering courses.
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| 2. |
- Delooz, Quentin, et al.
(author)
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Optimizing the channel resource usage for sensor data sharing with V2X communications
- 2023
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In: at – Automatisierungstechnik. - München : Walter de Gruyter. - 0178-2312 .- 2196-677X. ; 71:4, s. 311-317
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Journal article (peer-reviewed)abstract
- Sensor data sharing in V2X communication enables vehicles to exchange locally perceived sensor data with each other to increase their environmental awareness. It relies on the periodic exchange of selected, safety-relevant objects. Object selection is used to reduce channel resource usage. Additionally, vehicles use congestion control mechanisms to avoid overloading the channel. Currently, both object selection and congestion control mechanisms operate independently. We study a congestion-aware object filtering approach combining both and improving the performance of sensor data sharing. © 2023 Walter de Gruyter GmbH, Berlin/Boston.
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| 3. |
- Eriksson, Lars, 1970-, et al.
(author)
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Towards On-Board Engine Calibration with Feedback Control Incorporating Combustion Models and Ion-sense
- 2003
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In: Automatisierungstechnik. - : De Gruyter Oldenbourg. - 0178-2312 .- 2196-677X. ; 51:5, s. 204-212
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Journal article (peer-reviewed)abstract
- Die Technik der Ionenstrommessung dient der Untersuchung des Verbrennungsvorganges im Zylinder. Bei der Ionenstrommessung wird nach der Zündung eine Spannung zwischen der Mittel- und der Massenelektrode der Zündkerze angelegt. Anschliessend wird der Stromfluss zwischen diesen beiden Elektroden gemessen. Das Signal des Ionenstroms ist eine komplexe Funktion, die Informationüber den Zylinderdruck, die Zylindertemperatur und den Verbrennungsvorgang enth ält. Um diese Information zu erhalten, bedient man sich eines einfachen analytischen Ionenstrommodells. Das Modell besteht aus detaillierten Untermodellen zur Analyse des Drucks, der Temperatur, der thermischen Ionisierung und des Ionisierungsstroms innerhalb des Zylinders. Die Kalibrierung der Modellparameter erfolgt on-board durch eine Signalinterpretation. Experimentelle Untersuchungen zeigen eine gute Übereinstimmung mit dem Modell und ebnen damit den Weg hin zu einer Echtzeit-Kalibrierung des Motors. Ion-sense is a technique to probe the in-cylinder combustion by applying, after ignition, a sense voltage across the spark plug gap and measure the current through the gap. This current measurement is a complicated function that contains a lot of information about the in-cylinder pressure, temperature and combustion. To extract this information, a major contribution here is a simple analytical ionization current model that consists of explicit analytical submodels for in-cylinder pressure, temperature, thermal ionization, and ionization current. Since the model is analytical, the on-board signal interpretation is a simple adaptation of some model parameters. Experimental validation shows good agreement, and thus paves the way towards real-time on-board engine calibration.
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| 5. |
- Sinha, Roopak, et al.
(author)
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Automatic test case generation from requirements for industrial cyber-physical systems
- 2016
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In: Automatisierungstechnik. - : Walter de Gruyter GmbH. - 0178-2312. ; 64:3 (Special Issue), s. 216-230
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Journal article (peer-reviewed)abstract
- Industrial cyber-physical systems require complex software to orchestrate heterogeneous mechatronic components and control physical processes. This software is typically developed and refined iteratively in a model-driven fashion. Testing suchmulti-dimensional systems is extremely difficult as subsequent refinements may not correspond accurately with previous system models.
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| 9. |
- Xiong, Ning
(author)
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A case-based approach to decision analysis (Ein Fallbasiertes Verfahren zur Beschlussanalysis)
- 2009
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In: AT-AUTOMATISIERUNGSTECHNIK. - : Walter de Gruyter GmbH. - 0178-2312 .- 2196-677X. ; 57:9, s. 477-485
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Journal article (peer-reviewed)abstract
- This paper proposes a novel approach for integrating case-based reasoning (CBR) and decision theory for case-based decision analysis. CBR is employed as a methodology to reason from previous cases for building a decision model given a current situation, while decision theory is applied to the decision model learnt from previous cases to identify the most promising, secured, and rational choices. We have also tackled the issue of imprecise utility in individual cases and explained how fuzzy decision analysis can be conducted when case specific utilities are represented with fuzzy data.
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| 10. |
- Åström, Karl Johan, et al.
(author)
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Warum können wir Fahrrad fahren
- 2001
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In: Automatisierungstechnik. - : Walter de Gruyter GmbH. - 0178-2312. ; 49:10, s. 427-435
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Journal article (peer-reviewed)abstract
- Beim Fahrradfahren arbeitet der Mensch als Regler. Das wird beim Balancieren des Fahrrades besonders offensichtlich, denn das Fahrrad ist instabil. In diesem Beitrag wird untersucht, unter welchen Bedingungen es möglich ist, das Fahrrad mit einem so einfachen Reglergesetz zu balancieren, dass Menschen dieses Reglergesetz ohne Mühe realisieren können. Dabei wird nicht nur die jedem Radfahrer bekannte Lösung nachvollzogen, sondern auch untersucht, wie sich das Stabilisierungsproblem ändert, wenn nicht mit dem Vorderrad, sondern mit dem Hinterrad gelenkt wird, wie es für Liegeräder als zweckmäßig betrachtet wird. Es wird gezeigt, dass derartige Räder nicht mit der für die Vorderradlenkung bekannten proportionalen Regelung stabilisiert werden können und deshalb nicht praktisch einsetzbar sind. When cycling, a man acts as a controller. This is obvious if the balancing of a bike is considered, because the bike is unstable. This paper investigates under what conditions a bike can be stabilised by a simple feedback that can be easily applied by a human being on the bike. The well known solution of cycling is re-investigated and, moreover, it is shown how the stabilisation problem changes if the bicycle is steered by the back wheel rather than the front wheel. Back wheel steering has been considered for recumbent bicycle. However, this paper shows that such bikes cannot be stabilised by a simple feedback and, hence, they are not useful in practice.
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