Kempten (Allgau), Germany

Kempten University of Applied Sciences
Kempten (Allgau), Germany

The Kempten University of Applied science or Hochschule Kempten is a university of applied science in Kempten im Allgäu, Germany. Wikipedia.

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Klemenc J.,University of Ljubljana | Rupp A.,Kempten University of Applied Sciences | Fajdiga M.,University of Ljubljana
International Journal of Impact Engineering | Year: 2012

Church bells are exposed to severe loading conditions during ringing, which results in different damage modes due to material wear, fatigue loading, material deficiencies, different clapper-to-bell layouts, etc. As part of the activities of an EU-funded project called Maintenance and Protection of Bells (PROBELL), experimental investigations and finite-element simulations of the local contact between the clapper and the bell were carried out to study the wear-related damage to bells. First a simplified model was built to assess under the laboratory-controlled conditions the consequences of the repetitive impacts between a spherical body made from steel and a flat block made from bronze. After the results of the finite-element simulations for a simplified model were in reasonable agreement with the measured data a full-scale finite-element model for simulating the repetitive clapper-to-bell strokes was built. The simulations with the full-scale model were performed for variations of the parameters that influence the structural behaviour of the bell and the clapper: the clapper material, the clapper mass, the relative impact velocity of the clapper, the shape of the clapper, the clapper's pin support, the clapper's impact angle, the clapper's guide accuracy, the bell's sound-burp thickness and the coefficient of friction between the clapper and the bell. The agreement between the simulated and the measured results and the relation between the local stress-strain state and the damage to the bell in the contact area are discussed. © 2012 Elsevier Ltd. All rights reserved.

Rahmoun A.,Kempten University of Applied Sciences | Loske M.,Kempten University of Applied Sciences | Rosin A.,Tallinn University of Technology
Energy Procedia | Year: 2014

This paper presents the design, implementation and verification of methods to determine the electrochemical impedance spectrum of a Lithium-Ion battery by using methods of digital signal processing. The principle is to excite the battery by applying a current step and measuring the voltage response. Both signals, the stimulation and response signal, are the basis of the signal processing algorithm. The method is verified theoretically with a very good accuracy by a computer simulation and was successfully applied to real cells under laboratory conditions. The reference impedance spectra for the evaluation are produced by the electrochemical impedance spectroscopy (EIS) technique. © 2014 The Authors.

Finkenrath M.,International Energy Agency | Finkenrath M.,Kempten University of Applied Sciences
Chemical Engineering and Technology | Year: 2012

Energy scenarios suggest that CO 2 capture and storage (CCS) from power plants might contribute significantly to global greenhouse gas emission reduction. Since CCS from power generation is an emerging technology that has not been demonstrated on a commercial scale, related cost and performance information is still uncertain. This paper presents a detailed analysis of the impact of adding CO 2 capture and compression process equipment to fossil-fuelled power plants. For coal-fired power generation, no single capture technology outperforms available alternative capture processes in terms of cost and performance. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Agency: European Commission | Branch: H2020 | Program: MSCA-RISE | Phase: MSCA-RISE-2016 | Award Amount: 828.00K | Year: 2017

The main goal of the CLOVER project is to offer a novel methodology in an environmental mechatronic control system design relying on multidisciplinary knowledge. This methodology should allow aspects to be taken into account, such as controller robustness, indirect measurement of system states and parameters, and disturbances attenuation on the stage of establishing controller architecture. In addition, methods for tuning the control algorithms will be developed and based on the solution of optimization task considering control priorities, such as environment friendliness and energy efficiency. The implementation of the project CLOVER is based on intensive staff exchange that will lead to collaborative research and training between universities and industrial organizations from Germany, Austria, Belgium, Norway, UK, Mexico, and Japan. To guarantee a strong focus of the project activities on real-world problems, the CLOVER concept is based on the R&D and training in three interfacing topics: Mechatronic chassis systems of electric vehicles, Mechatronic-based grid-interconnection circuitry, and Offshore mechatronics, which will identify and facilitate collaborative learning and production of innovative knowledge. The CLOVER objectives will be achieved through intensive networking measures covering knowledge transfer and experience sharing between participants from academic and non-academic sectors, and professional advancement of the consortium members through intersectoral and international collaboration and secondments. In this regard, the CLOVER project is fully consistent with the targets of H2020-MSCA-RISE programme and will provide excellent opportunities for personal career development of participating staff and will lead to the creation of a strong European and international research group to create new environmental mechatronic systems.

Huesgen T.,Kempten University of Applied Sciences
IEEE Transactions on Industry Applications | Year: 2014

Aluminum electrolytic capacitors are standard components in power electronic equipment. Their performance and lifetime strongly depend on their operation temperature. Hence, controlling their temperature is essential for the reliable operation of the equipment. For standard snap-in type capacitors, which are common in low-power converters (< ∼20 kW), direct air cooling is the standard solution. This paper presents ways to improve the cooling performance by attaching the capacitor to a heat sink. Two different configurations are investigated: heat removal through the base of the capacitor and heat removal through its sidewalls. When applied with an aluminum heat sink in natural convection, both methods provide significantly reduced thermal resistances, approximately 57% lower compared to direct air cooling by natural convection. © 1972-2012 IEEE.

Vollrath J.,Kempten University of Applied Sciences
IEEE Global Engineering Education Conference, EDUCON | Year: 2015

An open online electrical engineering automatic task generation tool with minimum hardware requirements and programming effort is presented. This system can be run on portable Linux access points with php or on a linux web server. Users can do the tasks with handheld devices or PCs also as live feedback system. A novel feature is a pre task submission userid management system allowing open access to all ecercises and selected evaluation of results. Results of use for exercises in a basic electrical engineering class are presented. The openness of the system allows reusability, customization and easy task creation in HTML and evaluation. Data analysis gives professor feedback about proficiency of students. © 2015 IEEE.

Vollrath J.,Kempten University of Applied Sciences
IEEE Global Engineering Education Conference, EDUCON | Year: 2014

Outcomes based teaching and learning requires monitoring of teaching and students learning. So far teaching can be monitored by video, document camera or screen recordings or by a coach. This creates hard to edit video content. Also static questionnaires are used for outcome monitoring and problem solving purposes. This paper presents a new approach using dynamic HTML5 web pages with JavaScript enabling creating editable and searchable open source content on the fly in real time during lecture. Data can easily be transferred from the web page to data processing tools. This allows explorations by students. Based on this automated problem generation and solving is shown in an example of root mean square voltage calculation. Results can be sent to a server to implement a live feedback system. All data and programs are embedded in the web document. Therefore it is much easier to reuse content, evaluate style and improve lectures increasing efficiency of teaching. © 2014 IEEE.

Reimann C.L.,Kempten University of Applied Sciences | Dreier B.,Kempten University of Applied Sciences
VISIGRAPP 2016 - Proceedings of the 11th Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications | Year: 2016

In this paper, a new algorithm to render soft shadows in real time applications is introduced, namely the Occluding Edges Soft Shadow algorithm (short OESS). The algorithm approximates the shadow cast from linear lights by finding the outlines of an occluding object (Occluding Edges) and considering these in a fragment's illumination. The method is based on the shadow mapping technique, whereby its capability of rendering the shadow at an interactive rate does not depend on the complexity of the scene. The paper supplies an overview for several methods to produce shadows and soft shadows in real time computer graphics, a detailed description of the newly developed algorithm, and a section with results and future possibilities for improvements. © Copyright 2016 by SCITEPRESS - Science and Technology Publications, Lda. All rights reserved.

Rahmoun A.,Kempten University of Applied Sciences | Biechl H.,Kempten University of Applied Sciences
Przeglad Elektrotechniczny | Year: 2012

This paper presents the fundamentals of a method how to determine the state of charge (SOC) of lithium-ion batteries on the basis of two different equivalent circuit diagrams and an extended Kalman filter (EKF). It describes how to identify the parameters of these circuits by characteristic measurements. The comparison between measurement and computation results shows a good accordance. In the first step the dependency of these parameters on the temperature and on the battery age is neglected.

Vollrath J.,Kempten University of Applied Sciences
IEEE Global Engineering Education Conference, EDUCON | Year: 2013

No cost software tools and low cost measurement equipment enables improved teaching of circuit design. This paper presents results incorporating models, simulation and measurement together in teaching and laboratory. Comparison of circuit equations with measurement and simulation data addresses different learning styles and promotes advance in reflective judgment stages. It is closer to industrial work style and gives the student a feel for variations and accuracy in circuit design and measurement. A low cost electrical laboratory board (Electronic Explorer), a circuit simulator (LTSPICE) and a spreadsheet program can be used during lecture, laboratory and at home to align results and motivate students for a deep learning approach. This paper presents necessary modification for lecture and laboratory and looks at the results using these tools. © 2013 IEEE.

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