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8th Euromicro Workshop on Parallel and Distributed Processing, EURO-PDP 2000

作者： Sandkuhl, K. Messer, B. Fraunhofer Institute for Software Engineering and Systems Engineering ISST Mollstr. 1 BerlinD-10178 Germany

ISBN: (纸本)0769505007

Standard groupware products do not fulfill the specific requirements of various application areas, due to technical restrictions, lack of flexibility or non-availability of adapted interfaces. In view of this situation, development of groupware products for specialized application areas will continue to be necessary. Our approach is to support this kind of software development project by providing: a reference architecture for groupware applications as a guideline for software developers;reusable components and services;and design and architecture patterns. This paper presents a view concept for software architectures, a global reference architecture for groupware applications and an example from the application field of Web-publishing. © 2000 IEEE.

关键词： Groupware

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Parametrized physics-informed deep operator networks for Design of Experiments applied to Lithium-Ion-Battery cells

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Journal of Energy Storage 2025年 128卷

作者： Philipp Brendel Igor Mele Andreas Rosskopf Tomaž Katrašnik Vincent Lorentz Fraunhofer Institute for Integrated Systems and Device Technology IISB 91058 Erlangen Germany University of Ljubljana Faculty of Mechanical Engineering SI-1000 Ljubljana Slovenia Institute of Electronics for Electrical Energy Storage University of Bayreuth 95440 Bayreuth Germany

Model-based state estimation of lithium-ion batteries relies on a robust, yet efficient parametrization of the underlying model under different conditions, which can be analyzed and improved through the lenses of Design-of-Experiments (DoE) methodologies. This paper presents parametrized physics-informed deep operator networks (PI-DeepONets) trained without any measured or synthetic data to predict solutions of a Single-Particle-Model for varying current profiles and electrode-specific diffusivity values. The prediction accuracy is evaluated based on three use cases representing three sets of current profiles featuring constant, smoothly time-dependent and non-smooth pulse profiles. After training PI-DeepONets, lithium concentration profiles are predicted within milliseconds achieving normalized percentage errors on the particle surfaces below 0.3% for constant or smoothly time-dependent current profiles and below 2% for non-smooth pulse profiles. The fast approximation of Fisher-Information-Matrices (FIMs) based on the trained PI-DeepONets offers additional speed-up potentials for DoE methodologies and yields a speed-up factor of 30 in the considered use case when compared to classical FIM approximation via finite differences on numerical reference solutions.

关键词： Physics-Informed Neural Network (PINN) Deep Operator Network (DeepONet) Li-ion battery modeling Single-particle model Design of Experiments

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Microchip-based techniques with benefits for single cell characterization using optical analyses systems

Microchip-based techniques with benefits for single cell cha...

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IEEE-EMBS Special Topic Conference on Molecular, Cellular and Tissue engineering, MCTE 2002

作者： Thielecke, H. Robitzki, A.A. Department of Biohybrid Systems Fraunhofer Institute for Biomedical Engineering St. Ingbert Germany

ISBN: (纸本)0780375572

In medical biotechnology there is a growing need for efficient and reliable single cell analysis techniques. Fluorescence microscopy in combination with image analysis solution is a powerful tool for the characterization of cells. The performance and reliability of image analysis for cell characterization can be much improved if the cells are arranged in array structures. Here we introduce a microchip based approach for the analysis on the single cell level by using fluorescence techniques. pEGFP transfected and diacetyl fluorescein treated embryonic rat oligodendrocytes (OLN-93) are arranged in array structures by hydrodynamic positioning onto pores of microfabricated chips. Fluorescence micrographs of separated single cells in array structures are obtained. Different fluorescence intensities of single pEGFP-transfected oligodendrocytes are distinguishable. Using the proposed technique cells can be identified which fulfill predetermined criteria and easily addressed in the array. Further, the use of electrical impedance spectroscopy for positioning control and for determining the viability of the cells is discussed. © 2002 IEEE.

关键词： Genome

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Using a 3D time-of-flight range camera for visual tracking

Using a 3D time-of-flight range camera for visual tracking

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作者： Reiser, Ulrich Kubacki, Jens Department of Robot Systems Fraunhofer Institute for Manufacturing Engineering and Automation IPA Stuttgart Germany

ISBN: (纸本)9783902661654

We propose the usage of a novel 3D-Sensor for Visual Servoing in order to avoid the problem of depth estimation that is to be solved in most servoing schemes. The sensor used in this paper is based on the time-of-flight principle and returns a depth image along with an intensity image. As these are acquired by the same CCD array, no calibration between them is necessary. As an application example a position-based eye-in hand servoing scheme is presented with the sensor mounted on the end-effector of a pan-tilt unit. An experimental tracking task was defined as follows: a sphere moving with respect to the pan-tilt unit has to be kept in the optical centre of the camera. We implemented velocity-based control of the manipulator joints and obtained the following results: the pan-tilt unit was operated at a control frequeny of 17.5 Hz and - starting from a skewed pan and tilt - the sphere could be regulated to the optical center in less than one second.

关键词： Visual servoing

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FMUGym: An Interface for Reinforcement Learning-based Control of Functional Mock-up Units under Uncertainties 31

FMUGym: An Interface for Reinforcement Learning-based Contro...

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31st International Workshop on Intelligent Computing in engineering, EG-ICE 2024

作者： Wrede, Konstantin Huang, Chenzi Wohlfahrt, Tommy Hartmann, Nick Fraunhofer Institute for Integrated Circuits IIS Division Engineering of Adaptive Systems EAS Germany

Uncertainties complicate the task of designing optimal controllers for complex systems. This work introduces FMUGym, a novel open source interface that connects reinforcement learning libraries following the Gymnasium standard with co-simulation Functional Mock-up Units. As the latter encapsulate the model of the control plant, FMUGym can transform them into an environment of a reinforcement learning setup. FMUGym allows to inject uncertainties into system dynamics, inputs and outputs during training. This fosters robust control policies that adapt to possible variations and aims to bridge the simulation-to-reality gap. We demonstrate FMUGym's effectiveness by training an agent to control a nonlinear system with and without uncertainties, highlighting the benefit of noise injection. A second example showcases applicability in heating, ventilation and air conditioning systems. The source code and additional resources for this project are available on GitHub (https://***/fraunhofer-IIS/fmugym), with further development planned based on community feedback. © 2024 Proceedings of the 31st International Workshop on Intelligent Computing in engineering, EG-ICE 2024. All rights reserved.

关键词： Air conditioning

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A novel approach to identify automation potentials of assembly processes directly from CAD models

A novel approach to identify automation potentials of assemb...

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2021 IEEE International Conference on Electrical, Computer, Communications and Mechatronics engineering, ICECCME 2021

作者： Neb, Alexander Fraunhofer Institute of Production Engineering and Automation Department Robot and Assistive Systems Stuttgart Germany

ISBN: (纸本)9781665412629

Even experts struggle with the decision which processes should be automated and which not. The best solution these days is the so-called Automation Potential Analyses (APA). However, the APA can just be applied to already existing manual assembly processes. In this work, a new approach was developed to define the automation potential already in the product development process with the help of a 3D CAD model. For this purpose, an expert system was developed, which automatically evaluates the automation potentials by accessing the CAD system SolidWorks and using evaluation criteria of the already existing APA of the fraunhofer IPA. © 2021 IEEE.

关键词： Automation

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Development of a novel microcapillary array: Characterization of in vitro 3D tissue models by bioimpedance spectroscopy

Development of a novel microcapillary array: Characterizatio...

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IEEE-EMBS Special Topic Conference on Molecular, Cellular and Tissue engineering, MCTE 2002

作者： Robitzki, A.A. Thielecke, H. Reininger-Mack, A. Fraunhofer Institute for Biomedical Engineering Department of Biohybrid Systems St. Ingbert Germany

ISBN: (纸本)0780375572

Automated screening of the selectivity, toxicity, metabolism and absorption of drugs could support the development of novel innovative diagnosis and therapeutics. The biotechnological research demands on effective methods and technologies for characterization and biomonitoring of living cells and tissues. Therefore, a bioelectronic microstructure for monitoring 3D in vitro tissues or cell coupled microcarriere beads by impedance spectroscopy and/or potential recording has been developed and fabricated. The feasibility of the capillary measurement system has been demonstrated using various 3D tissue models e.g. breast cancer tumor spheroids and 3D heart muscle cell aggregates. The antiproliferative influence of gene therapeutical agents in tumours or the beta-receptor inhibitor interaction in heart muscles resulting in altered synchronized contractions could be shown using a four electrode configuration in a glass capillary with an inner diameter of 300 μm. The prototype of a microcapillary array has been fabricated using a biocompatible polymer with parallel oriented capillaries with diameters of 100 μm, 200 μm, 300 μm and 400 μm and implemented platinum microelectrodes. The in vitro tissues can be positioned synchronously by hydrodynamic pressure in culture medium. The dielectric attributes of the living system can be monitored in an electric field by impedance spectroscopy according to a frequence range. © 2002 IEEE.

关键词： Microelectrodes

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Guidance on a Digital Factory Twin: Proposal for a Reference Architecture

Guidance on a Digital Factory Twin: Proposal for a Reference...

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2024 IEEE International Conference on Technology Management, Operations and Decisions, ICTMOD 2024

作者： Jonas, Lick Fiona, Kattenstroth Malte, Trienens Jan-Philipp, Disselkamp Arno, Kuhn Roman, Dumitrescu Fraunhofer Institute for Mechatronic Systems Design Department for Digital Transformation Paderborn Germany Fraunhofer Institute for Mechatronic Systems Design Department for Digital Engineering Paderborn Germany Fraunhofer Institute for Mechatronic Systems Design Department for Systems Lifecycle Management Paderborn Germany Fraunhofer Institute for Mechatronic Systems Design Division for Product Development Paderborn Germany University of Paderborn - Heinz Nixdorf Institute Professorship Advanced Systems Engineering Paderborn Germany

ISBN: (纸本)9798350367355

The digital twin in manufacturing, also called digital factory twin (DFT), is not only a recent technology but also a polymorphic concept which generates a profusion of state-of-the-art work from industry and research without real coherence. The work relates to very different realities including various definitions, shapes, models and applications. A wide variety of architectures are proposed and there is a significant lack of information on how to deploy a digital twin efficiently and how to define an appropriate architecture. The DFT is often implemented use-case-driven and in various ways concerning IT architectures. The paper proposes a reference architecture based on enterprise architecture modelling language ArchiMate and TOGAF principles, which allows to model business architectures and IT architectures. We make use of that and model a DFT business architecture based on the lifecycle of a factory and a DFT IT architecture based on IT applications and IT functions. © 2024 IEEE.

关键词： Smart manufacturing

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Deep Learning Based Real-Time Spectrum Analysis for Wireless Networks 26

Deep Learning Based Real-Time Spectrum Analysis for Wireless...

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26th European Wireless Conference, EW 2021

作者： Wicht, Jakob Wetzker, Ulf Frotzscher, Andreas Fraunhofer Institute for Integrated Circuits Division Engineering of Adaptive Systems EAS Dresden Germany

ISBN: (纸本)9783800756735

Wireless networks are indispensable in today’s production and automation. In an industrial environment, they are used in particular for networking moving or inaccessible parts of a factory. Due to difficult signal propagation conditions as well as coexisting wireless networks, transmission errors that can lead to malfunctions in the application are often very difficult to identify. Wireless remote monitoring systems are essential tools for diagnosing such faults. This work is intended to contribute to the improvement of failure analysis tools for wireless networks. The fundamental approach relies on an extension of standard protocol analysis tools by sensitive measurements of a spectrum analyser. Using Machine Learning-based image processing algorithms, individual frames of different radio technologies are detected in real time and classified according to their communication standard. A subsequent statistical processing or anomaly detection provides an abstract view to the spectrogram and enables a cross connection to the protocol analysis. Using IEEE 802.11 as an example, it can be shown that frames and frame collisions can be detected with a high degree of accuracy. In conclusion, the performance of the developed method is evaluated and compared with a protocol-based monitoring system. © 2021 26th European Wireless Conference, EW 2021. All Rights Reserved.

关键词： Wireless networks

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Control parameter optimization of the actively powered upper body exoskeleton using subjective feedbacks 3

Control parameter optimization of the actively powered upper...

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3rd International Conference on Control, Automation and Robotics, ICCAR 2017

作者： Ebrahimi, Amir Groninger, Dorothea Singer, Rapahel Schneider, Urs Department Biomechatronic Systems Fraunhofer Institute for Manufacturing Engineering and Automation IPA Stuttgart Germany

ISBN: (纸本)9781509060870

A method of optimizing the control parameter of wearable exoskeletons for industrial applications using subjective feedbacks is introduced in this paper. The human sensory system is explained and a method of mapping these perceptions to the control parameter set of the exoskeleton is developed. Subsequently a method for online parameter adjustment based on the kinetic and kinematic quantities is established and the method is verified for a case study with the Stuttgart Exo-Jacket. © 2017 IEEE.

关键词： Sensory perception

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