@misc{9360, abstract = {{Background: Errors can have dangerous consequences, resulting in a preventive strategy in most company-based technical vocational education and training (TVET). On the contrary, errors provide a useful opportunity for learning due to mismatches of mental models and reality and especially to improve occupational safety and health (OSH). Objective: This article presents a didactic concept for developing a learning system based on learning from errors. Learners shall directly experience the consequences of erroneous actions through presenting error consequences in augmented reality to avoid negative, dangerous, or cost-intensive outcomes. Methods: Empirical data prove errors to be particularly effective in TVET. A formal description of a work system is systematically adopted to outline a connection between work, errors concerning OSH, and a didactic concept. A proof-of-concept systematically performs a use case for the developed learning system. It supports critical reflections from a technical, safety, and didactical perspective, naming implications and limitations. Results: By learning from errors, a work-based didactic concept supports OSH competencies relying on a learning system. The latter integrates digital twins of the work system to simulate and visualise dangerous error consequences for identified erroneous actions in a technical proof-of-concept. Results demonstrate the ability to detect action errors in work processes and simulations of error consequences in augmented reality. Conclusion: The technical learning system for OSH education extends existing learning approaches by showcasing virtual consequences. However, capabilities are limited regarding prepared learning scenarios with predefined critical errors. Future studies should assess learning effectiveness in an industrial scenario and investigate its usability.}}, author = {{Goppold, Marvin and Herrmann, Jan-Phillip and Tackenberg, Sven and Brandl, Christopher and Nitsch , Verena}}, booktitle = {{Work}}, issn = {{1875-9270 }}, keywords = {{Vocational education, digital twin, work system design}}, number = {{4}}, pages = {{1563--1575}}, publisher = {{IOS Press}}, title = {{{An error-based augmented reality learning system for work-based occupational safety and health education}}}, doi = {{10.3233/WOR-211243}}, volume = {{72}}, year = {{2022}}, } @inproceedings{9666, abstract = {{In mechanical engineering, individual functional units of a machine are often assembled by one operator at single workstations or at one-piece flow lines. Based on the order information, the required parts are taken from flow racks and assembled step by step to build a functional unit. The existing assembly concepts have two decisive disadvantages in operational practice. First, a large number of components to be provided leads to long walking distances at the work station or line. Second, as the complexity of the assembly task increases, the informational portion of the work increases, so that paper-based information provision can lead to unnecessary assembly errors and additional times. For these reasons, a compacted assembly system has been developed in which, firstly, material is supplied via driven carousels and, secondly, the necessary information is provided to the operator via a cognitive assistance system. The article shows that this concept can reduce walking distances while avoiding assembly errors and additional times.}}, author = {{Hinrichsen, Sven and Nikolenko, Alexander and Beckmann, Nils and Meyer, Frederic}}, booktitle = {{IEEM2022 : IEEE International Conference on Industrial Engineering and Engineering Management (IEEM) : Kuala Lumpur, Malaysia, 07-10 December 2022 }}, isbn = {{978-1-6654-8688-0}}, keywords = {{assembly system, assistance system, complexity}}, location = {{Kuala Lumpur}}, publisher = {{IEEE}}, title = {{{Development of a New Type of Carousel-based Compacted Work System for Mixed-model Assembly in Mechanical Engineering}}}, doi = {{10.1109/ieem55944.2022.9989731}}, year = {{2022}}, } @misc{11803, abstract = {{Sub-optimal control policies in intersection traffic signal controllers (TSC) contribute to congestion and lead to negative effects on human health and the environment. Reinforcement learning (RL) for traffic signal control is a promising approach to design better control policies and has attracted considerable research interest in recent years. However, most work done in this area used simplified simulation environments of traffic scenarios to train RL-based TSC. To deploy RL in real-world traffic systems, the gap between simplified simulation environments and real-world applications has to be closed. Therefore, we propose LemgoRL, a benchmark tool to train RL agents as TSC in a realistic simulation environment of Lemgo, a medium-sized town in Germany. In addition to the realistic simulation model, LemgoRL encompasses a traffic signal logic unit that ensures compliance with all regulatory and safety requirements. LemgoRL offers the same interface as the well-known OpenAI gym toolkit to enable easy deployment in existing research work. To demonstrate the functionality and applicability of LemgoRL, we train a state-of-the-art Deep RL algorithm on a CPU cluster utilizing a framework for distributed and parallel RL and compare its performance with other methods. Our benchmark tool drives the development of RL algorithms towards real-world applications.}}, author = {{Müller, Arthur and Rangras, Vishal and Schnittker, Georg and Waldmann, Michael and Friesen, Maxim and Ferfers, Tobias and Schreckenberg, Lukas and Hufen, Florian and Jasperneite, Jürgen and Wiering, Marco}}, booktitle = {{20th IEEE International Conference on Machine Learning and Applications (ICMLA)}}, editor = {{Wani, M. Arif}}, keywords = {{deep reinforcement learning, traffic signal control, intelligent transportation system, traffic simulation}}, location = {{Pasadena, CA, USA }}, publisher = {{IEEE}}, title = {{{Towards Real-World Deployment of Reinforcement Learning for Traffic Signal Control}}}, doi = {{10.1109/ICMLA52953.2021.00085}}, year = {{2021}}, } @article{7035, abstract = {{Technological progress, upcoming cyber-physical systems, and limited resources confront small and medium-sized enterprises (SMEs) with the challenge of complexity management in product development projects spanning over the entire product lifecycle. SMEs require a solution for documenting and analyzing the functional relationships between multiple domains such as products, software, and processes. The German research project FuPEP “Funktionsorientiertes Komplexitätsmanagement in allen Phasen der Produktentstehung” aims to address this issue by developing an assistance system that supports product developers by visualizing functional relationships. This paper presents the methodology and results of the assistance system’s requirements elicitation with two SMEs. Conducting the elicitation during a global pandemic, we discuss its application using specific techniques in light of COVID-19. We model problems and their effects regarding complexity management in product development in a system dynamics model. The most important requirements and use cases elicited are presented, and the requirements elicitation methodology and results are discussed. Additionally, we present a multilayer software architecture design of the assistance system. Our case study suggests a relationship between fear of a missing project focus among project participants and the restriction of requirements elicitation techniques to those possible via web conferencing tools.}}, author = {{Herrmann, Jan-Phillip and Imort, Sebastian and Trojanowski, Christoph and Deuter, Andreas}}, issn = {{2073-431X}}, journal = {{Computers}}, keywords = {{complexity management, assistance system, product development, systems engineering, design structure matrix, asset administration shell}}, number = {{11}}, title = {{{Requirements Elicitation for an Assistance System for Complexity Management in Product Development of SMEs during COVID-19: A Case Study}}}, doi = {{10.3390/computers10110149}}, volume = {{10}}, year = {{2021}}, } @article{4897, abstract = {{Assistance is becoming increasingly relevant in carrying out industrial work in the context of cyber-physical production systems (CPPSs) and Industry 4.0. While assistance in a single task via a single interaction modality has been explored previously, crossdevice interaction could improve the quality of assistance, especially given the concurrent and distributed nature of work in CPPSs. In this paper, we present the theoretical foundations and implementation of MiWSICx (Middleware for Work Support in Industrial Contexts), a middleware that showcases how multiple interactive computing devices such as tablets, smartphones, augmented/virtual reality glasses, and wearables could be combined to provide crossdevice industrial assistance. Based on activity theory, MiWSICx models human work as activities combining multiple users, artifacts, and cyber-physical objects. MiWSICx is developed using the actor model for deployment on a variety of hardware alongside a CPPS to provide multiuser, crossdevice, multiactivity assistance.}}, author = {{Dhiman, Hitesh and Röcker, Carsten}}, issn = {{2288-4300 }}, journal = {{Journal of Computational Design and Engineering}}, keywords = {{human–technology interaction, human–computer interaction, crossdevice interaction, cyber-physical systems, assistance, smart factory, middleware, actor model, information system design, industry 4.0}}, number = {{1}}, pages = {{428--451}}, publisher = {{Oxford University Press}}, title = {{{Middleware for providing activity-driven assistance in cyber-physical production systems}}}, doi = {{10.1093/jcde/qwaa088}}, volume = {{8}}, year = {{2021}}, } @misc{8326, abstract = {{Gamification is a widely used way of increasing motivation and fun in the use of systems that are not games. By outlining critical aspects in developing gamified systems, we adapted the modelling technique event storming in the context of a special case study where a gamified, collaborative platform was developed. For this purpose, the relationship of event storming and spatial hypertext has been worked out and an event storming extension has been introduced based on spatial hypertext principles. With respect to the case study and further insights in the academic context, we discuss how the emerging nature of event storming could benefit from a specialized spatial hypertext tool.}}, author = {{Grimm, Valentin and Rubart, Jessica}}, booktitle = {{Proceedings of the 4th international Workshop on Human Factors in Hypertext (HUMAN’21)}}, editor = {{Rubart, Jessica and Atzenbeck, Claus}}, isbn = {{978-1-4503-8560-2}}, keywords = {{Spatial Hypertext, Gamification, Event Storming, System Modeling, Collaborative Modeling, Gamified System}}, location = {{Virtual Event, Ireland}}, pages = {{3--10}}, publisher = {{ACM Press}}, title = {{{Modelling Gamified Systems with Event Storming Augmented by Spatial Hypertext}}}, doi = {{10.1145/3468143.3483927}}, year = {{2021}}, } @misc{8380, abstract = {{Currently, numerous single-track railway lines are disused due to economic reasons. However, they could be reactivated for a bidirectional on-demand service traffic by small vehicles that use only one rail. MonoCabs are such small cabin-like vehicles, stabilized by a system of control moment gyroscopes and a moveable mass. They could make an important contribution to improve the mobility offer especially in rural areas. This paper is focused on the vertical stabilization system of the MonoCab. This system is discussed based on a physical three body model which describes the rolling motion of the vehicle, the lateral motion of the mass and the precession motion of the gyroscope. The model is utilized for a cascaded control concept adjusting the vehicle’s roll angle and gyroscope’s gimbal angle. The proposed stabilization concept is capable of compensating both high dynamic disturbances and stationary disturbances (e. g. unbalanced loads and steady wind flows). The concept is analyzed by simulations and experimental investigations utilizing a small scaled test rig and a rapid control prototyping system. Beside transient command responses also the frequency response of the system is experimentally evaluated and used for a validation of the model and theoretical findings.}}, author = {{Griese, Martin and Kottmeier, Fabian and Schulte, Thomas}}, booktitle = {{IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society}}, isbn = {{978-1-6654-3554-3}}, issn = {{2577-1647 }}, keywords = {{Vehicle dynamics, Control moment gyroscope, Control system analysis, Roll stabilization, Monorail vehicles}}, location = {{Toronto, ON, Canada }}, pages = {{pp. 1--6}}, publisher = {{IEEE}}, title = {{{Vertical control of a self-stabilizing monorail vehicle}}}, doi = {{10.1109/IECON48115.2021.9589726}}, year = {{2021}}, } @misc{8385, abstract = {{Currently, numerous single-track railway lines are disused due to economic reasons. However, they could be reactivated for a bidirectional on-demand service traffic by small vehicles that use only one rail. MonoCabs are such small cabin-like vehicles, stabilized by a system of control moment gyroscopes and a moveable mass. They could make an important contribution to improve the mobility offer especially in rural areas. This paper focuses on the analytical modeling and vertical stabilization system of the MonoCab. A nonlinear dynamic model is obtained using the Lagrangian method and subsequently linearized about its equilibrium point. Which is used for the design of the cascade control system. The dynamic analysis of the system is accomplished by comparing between analytically derived model in simulink environment and same structured model in simscape multibody. This system is discussed based on a physical three body model which describes the rolling motion of the vehicle, the lateral motion of the mass and the precession motion of the gyroscope. The model is utilized for a cascaded control concept adjusting the vehicle’s roll angle and gyroscope’s precession angle. The proposed stabilization concept is capable of compensating both high dynamic disturbances and stationary disturbances (e. g. unbalanced loads and steady wind flows). The concept is analyzed by simulations and experimental investigations. Beside transient command responses also the frequency response of the system is experimentally evaluated and used for a validation of the model and theoretical findings. For the experimental validation, a small scaled test rig is used which consists of mechanical frames and flywheels, inverter-fed drives, rotary encoders, an inertial measurement unit (IMU) and a rapid control prototyping system.}}, author = {{Griese, Martin and Mousavi, Seyed Davood and Schulte, Thomas}}, booktitle = {{2021 9th International Conference on Control, Mechatronics and Automation (ICCMA)}}, keywords = {{Vehicle dynamics, Control moment gyroscope, Control system analysis, Roll stabilization, Monorail vehicles}}, location = {{Belval, Luxembourg }}, pages = {{205--210}}, publisher = {{IEEE}}, title = {{{Modeling the Vertical Dynamics of a Self-stabilizing Monorail Vehicle}}}, doi = {{10.1109/ICCMA54375.2021.9646219}}, year = {{2021}}, } @inproceedings{4094, abstract = {{Projection-based assitive systems that guide users through assembly work are on their way to industrial application. Previous research work investigated how people can be supported with such systems. However, there has been little work on the question on how to generate and author sequential instructions for assitive systems. In this paper, we present a new concept and a prototypical implementation of an assitive system that can be taught by demonstrating an assembly process. By using a combination of RGB and depth cameras, we can generate an assembly instruction of Lego Duplo bricks based on the demonstration of a user. This generated manual can later on be used for assisting other users in the assembly process. By our prototype system, we show the technological feasibility of assistive systems that can learn from users.}}, author = {{Büttner, Sebastian and Peda, Andreas and Heinz, Mario and Röcker, Carsten}}, booktitle = {{22nd International Conference on Human-Computer Interaction}}, isbn = {{978-3-030-50343-7}}, keywords = {{Assitive system, Authoring, Instruction generation, Computer vision, Teaching by demonstration}}, location = {{Copenhagen, Denmark}}, pages = {{153--163}}, publisher = {{Springer}}, title = {{{Teaching by Demonstrating – How Smart Assistive Systems Can Learn from Users}}}, doi = {{https://doi.org/10.1007/978-3-030-50344-4_12}}, volume = {{12203}}, year = {{2020}}, } @misc{4100, author = {{Schmohl, Tobias and Schwickert, Susanne and Glahn, Oliver}}, booktitle = {{The Future of Education}}, keywords = {{Artificial Intelligence, intelligent tutoring system, reflection, project-based learning, online-learning, interactive video}}, location = {{Florenz}}, pages = {{309--313}}, publisher = {{Libreriauniversitaria.it}}, title = {{{Conceptual Design of an AI-Based Learning Assistant }}}, doi = {{10.26352/E618_2384-9509}}, year = {{2020}}, } @phdthesis{12717, abstract = {{Der Anstieg der Komplexität in Produktionssystemen stellt eine der größten Herausforderungen für produzierende Unternehmen dar. In der vorliegenden Dissertation werden mögliche Auswirkungen von Komplexität auf die Performance von Produktionsgruppen untersucht. Es werden sechs Studien durchgeführt, die inhaltlich und methodisch aufeinander aufbauen und somit einen vollständigen Forschungsprozess von der initialen Begriffsbestimmung bis hin zur Ableitung von Gestaltungsempfehlungen für die betriebliche Praxis beschreiben. In der Explorationsphase wird zunächst eine qualitative Interviewstudie durchgeführt, um konkrete Treiber für das Phänomen der Komplexität in digitalisierten Arbeitssystemen zu identifizieren. Basierend auf zwei systematischen Literaturstudien wird der Stand der Forschung zu (1) Komplexitätsmodellen und (2) Gruppenperformancemodellen im Kontext von Produktionssystemen strukturiert erarbeitet und das bestehende Forschungsdefizit offengelegt. Auf der Grundlage der Vorstudien wird ein hypothetisches Modell zur Erklärung der Performance von Produktionsgruppen entwickelt, das neben bekannten Einflussgrößen aus der Teamforschung verschiedene Komplexitätsdimensionen berücksichtigt. Die Operationalisierung der latenten Variablen erfolgt mit Hilfe einer weiteren qualitativen Interviewstudie. Das Gruppenperformancemodell wird in einer Fragebogenstudie (n = 455) unter Anwendung der Methode der Strukturgleichungsmodellierung empirisch evaluiert. In der statistischen Auswertung wird u. a. festgestellt, dass ein positiver Zusammenhang zwischen der Aufgabenkomplexität und der Gruppenperformance besteht, der über die Qualität der Zusammenarbeit vermittelt wird. Dahingegen wird ein negativer Zusammenhang zwischen der Komplexität des Gruppendesigns und der Gruppenperformance identifiziert, der ebenfalls über die Qualität der Zusammenarbeit vermittelt wird. Aus den Ergebnissen werden konkrete Empfehlungen für die komplexitätsbezogene Gestaltung von Gruppenarbeit in der Produktion abgeleitet. Darüber hinaus wird eine Metrik zur Erfassung der Komplexität des Arbeitsprozesses von Produktionsgruppen entwickelt und in einer Simulationsstudie evaluiert. Die Metrik kann bereits in Planungsphasen von Produktionssystemen verwendet werden, um alternative arbeitsorganisatorische Gestaltungsoptionen anhand des resultierenden Komplexitätsniveaus für die Produktionsgruppe vergleichend zu analysieren. Zudem können die Auswirkungen unterschiedlicher Qualifikationsprofile auf das Komplexitätsniveau und die Performance einer Produktionsgruppe untersucht werden.}}, author = {{Latos, Benedikt}}, isbn = {{978-3-8440-7744-5}}, keywords = {{Produktionssystem, Komplexes System, Teamwork, Leistungsmessung}}, pages = {{324}}, publisher = {{Shaker Verlag}}, title = {{{Auswirkungen von Komplexität auf die Performance von Produktionsgruppen}}}, doi = {{10.2370/9783844077445}}, volume = {{37}}, year = {{2020}}, } @inproceedings{1900, abstract = {{More and more complex products are being fitted in small batches in manual assembly. Because of this, more information needs to be collected from employees and implemented in appropriate actions. At the same time, the informational design of assembly systems often shows deficits in operational practice. Manual assembly processes can be made more economical, reliable, and human-oriented with the help of informational assistance systems. Testing was carried out in the Laboratory for Industrial Engineering at the Ostwestfalen-Lippe University of Applied Sciences and Arts to verify this potential. Initial results on the use of augmented reality (AR) glasses in comparison to providing information in a paper-based format are presented.}}, author = {{Bendzioch, Sven and Bläsing, Dominic and Hinrichsen, Sven}}, booktitle = {{Human Systems Engineering and Design II Proceedings of the 2nd International Conference on Human Systems Engineering and Design (IHSED2019)}}, editor = {{Ahram, T. and Karwowski, W. and Pickl, S. and Taiar, R.}}, isbn = {{978-3-030-27927-1}}, keywords = {{Worker assistance system, Manual assembly, Human-machine interaction, Informational complexity}}, location = {{Universität der Bundeswehr, München}}, pages = {{20--25}}, publisher = {{Springer Nature}}, title = {{{Comparison of Different Assembly Assistance Systems Under Ergonomic and Economic Aspects}}}, doi = {{https://doi.org/10.1007/978-3-030-27928-8_4}}, volume = {{1026}}, year = {{2019}}, } @inproceedings{4323, abstract = {{The latest generation of head-mounted displays such as HoloLens pro- vide mixed reality capabilities that claim to better integrate the real and virtual worlds. In this paper, we would like the share our experiences in implementing a user interface for an assembly assistance system using the HoloLens. We carried out a preliminary evaluation of the applicability of mixed reality using the per- spective of developers and expert users in an assembly scenario that allows us to operate and compare two interfaces - a state-of-the-art projector display system and the HoloLens. We believe our findings may contribute towards a better un- derstanding of the effects of new display technologies such as the HoloLens in developing and using assistance systems in other fields as well. Areas that may be of future research are also highlighted.}}, author = {{Dhiman, Hitesh and Martinez, Sascha and Paelke, Volker and Röcker, Carsten}}, booktitle = {{HCI in Business, Government, and Organizations}}, editor = {{Fui-Hoon Nah, Fiona and Sophia Xiao, Bo}}, isbn = {{978-3-319-91715-3}}, keywords = {{Human machine interaction, Assembly assistance system, Qualitative study, HoloLens}}, location = {{Las Vegas, NV, USA}}, pages = {{67--78}}, publisher = {{Springer}}, title = {{{Head-Mounted Displays in Industrial AR-Applications: Ready for Prime Time?}}}, doi = {{10.1007/978-3-319-91716-0_6}}, volume = {{10923}}, year = {{2018}}, } @inproceedings{559, abstract = {{The navigation technique has been always an important issue for guiding an automated guided vehicle (AGV). With the development of sensor technology, software engineering, andalgorithms, there is a spectrum of different navigation methods for AGVs. Inorder to avoid the additional environmental installation,so as to increase the flexibility of route planning, but to keep the positioning precision, more sensors, such as light detection and ranging (LIDAR), wheel encoders and gyroscope are installed on the vehicles to be automated. Some intelligent algorithms such as simultaneous localization and mapping (SLAM) algorithms and Monte Carlo localization have been developed for the navigation of vehicles, including position and orientation. The interesting question, especially for the AGVmanufacturers, is: which algorithm is more suitable for which kind of applications. The suitabilityof an algorithm for the navigation of AGVs with facilities of Light Detection and Ranging(LIDAR), encoders and gyroscope ismainly determined by four properties. They are the positioning precision, computational costs, execution time and positioning repeatability. This paper intends to investigate the suitability of an algorithm or a navigation method for AGVs with LIDAR, wheel encoders,and gyroscope. The two aspects of positioningaccuracy and repeatability are especially concerned. A general comparison of different navigation methods and algorithms is given. An experimental platform with a basic vehicle, controlling system and sensors is then developed to further evaluate the algorithms. The hardware components and software components are compatible to robot operating system (ROS). This open-source robotics middleware provides services and tools for creating robot applications. As ROS SLAM nodes, open-source SLAM algorithms can be evaluated relatively easily without any rewriting or modification of the algorithms. As a new research field, there is not jet a SLAM algorithm, which is predominant absolutely.}}, author = {{Li, Li and Schulze, L.}}, booktitle = {{Production Engineering and Management}}, editor = {{Villmer, Franz-Josef and Padoano, Elio}}, isbn = {{978-3-946856-03-0}}, keywords = {{Automatedguided vehicle, Simultaneous localization and mapping, Robot operating system, Light detection and ranging}}, location = {{Lemgo}}, number = {{1}}, pages = {{213--223}}, title = {{{Comparison and Evaluation of SLAM Algorithms for AGV Navigation}}}, year = {{2018}}, } @article{11590, abstract = {{Reading centers provide centralized high-quality diagnostics in ophthalmic clinical trials. Since ophthalmic images are captured in electronic format at peripheral clinics, an integrated workflow for image transfer and creation of structured reports is needed, including quality assurance. The image portal and the study database are separate components. We assessed whether this integration is feasible with trial-related IT standards and built a prototype system as a proof-of-concept. CDISC ODM and OAuth authentication were used to integrate the image portal with x4T-EDC, facilitating automatic data transfer and single sign-on.}}, author = {{Bruland, Philipp and Kathöfer, Ulrike and Treder, Maximilian and Eter, Nicole and Dugas, Martin}}, issn = {{1879-8365}}, journal = {{Studies in health technology and informatics}}, keywords = {{Electronic Data Capture, Reading Center, System Integration}}, pages = {{1254}}, publisher = {{IOS Press}}, title = {{{Integrating x4T-EDC into an Image-Portal to Establish an Ophthalmic Reading Center.}}}, volume = {{245}}, year = {{2017}}, } @article{2014, abstract = {{Industrial applications are in transition towards modular and flexible architectures that are capable of self-configuration and -optimisation. This is due to the demand of mass customisation and the increasing complexity of industrial systems. The conversion to modular systems is related to challenges in all disciplines. Consequently, diverse tasks such as information processing, extensive networking, or system monitoring using sensor and information fusion systems need to be reconsidered. The focus of this contribution is on distributed sensor and information fusion systems for system monitoring, which must reflect the increasing flexibility of fusion systems. This contribution thus proposes an approach, which relies on a network of self-descriptive intelligent sensor nodes, for the automatic design and update of sensor and information fusion systems. This article encompasses the fusion system configuration and adaptation as well as communication aspects. Manual interaction with the flexibly changing system is reduced to a minimum.}}, author = {{Fritze, Alexander and Mönks, Uwe and Holst, Christoph-Alexander and Lohweg, Volker}}, issn = {{1424-8220}}, journal = {{Sensors}}, keywords = {{information fusion, intelligent sensor, knowledge-based system, self-configuration, sensor fusion}}, number = {{3}}, title = {{{An Approach to Automated Fusion System Design and Adaptation}}}, doi = {{ https://doi.org/10.3390/s17030601}}, volume = {{17}}, year = {{2017}}, } @inproceedings{265, abstract = {{The maintenance of a tool for injection molding or forming is usually accompanied by its disassembly and assembly. The duration of the assembly activities is often a large part of the total activity time for the maintenance of the tool. The degree of performance of the employees in the execution of these disassembly and assembly activities is often low. In addition, allowances occur (e.g. searching for work equipment). At the Industrial Engineering Lab of the Ostwestfalen-Lippe University of Applied Sciences, a prototype of an assistance system was developed to support the assembly activities in toolmaking. With the help of this system, the operator is guided step by step through the assembly process. The economic potential of the system exists in the reduction of training times, the avoidance of assembly errors and the increase of labor productivity.}}, author = {{Hinrichsen, Sven and Riediger, Daniel and Unrau, Alexander}}, booktitle = {{2017 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM)}}, isbn = {{978-1-5386-0948-4 }}, keywords = {{injection moulding, machine tools, maintenance engineering, productivity, projection-based assistance system, injection molding tools, assembly activities, assembly process, assembly errors, tool maintenance, disassembly activities, economic potential, Industrial Engineering Lab, Ostwestfalen-Lippe University of Applied Sciences, toolmaking, Tools, Injection molding, Maintenance engineering, Usability, Task analysis, Workstations, Morphology, assembly assistance systems, assistance systems, maintenance of injection molding tools, manual assembly}}, location = {{Singapore}}, number = {{1}}, pages = {{1571--1575}}, title = {{{Development of a Projection-Based Assistance System for Maintaining Injection Molding Tools}}}, doi = {{https://doi.org/10.1109/IEEM.2017.8290157}}, year = {{2017}}, } @inproceedings{4254, abstract = {{The current trend of integrating machines and factories into cyber-physical systems (CPS) creates an enormous complexity for operators of such systems. Especially the search for the root cause of cascading failures becomes highly time-consuming. Within this paper, we address the question on how to help human users to better and faster understand root causes of such situations. We propose a concept of interactive alarm flood reduction and present the implementation of a first vertical prototype for such a system. We consider this prototype as a first artifact to be discussed by the research community and aim towards an incremental further development of the system in order to support humans in complex error situations.}}, author = {{Büttner, Sebastian and Wunderlich, Paul and Heinz, Mario and Niggemann, Oliver and Röcker, Carsten}}, booktitle = {{ Machine Learning and Knowledge Extraction : First IFIP TC 5, WG 8.4, 8.9, 12.9 International Cross-Domain Conference, CD-MAKE 2017, Reggio, Italy, August 29 – September 1, 2017, Proceedings}}, editor = {{Holzinger, Andreas}}, isbn = {{978-3-319-66807-9}}, keywords = {{Alarm flood reduction, Machine learning, Assistive system}}, location = {{Reggio, Italy}}, pages = {{69--82}}, publisher = {{Springer}}, title = {{{Managing Complexity: Towards Intelligent Error-Handling Assistance Trough Interactive Alarm Flood Reduction}}}, volume = {{10410}}, year = {{2017}}, } @phdthesis{11142, abstract = {{This dissertation proposes and investigates an isochronous wireless network for industrial control applications with guaranteed latencies and jitter. Based on a requirements analysis of real industrial applications and the characterisation of the wireless channel, the solution approach is developed. It consists of a TDMA-based medium access control, a dynamic resource allocation and the provision of a global time base for the wired and the wireless network. Due to the global time base, the solution approach allows a seamless and synchronous integration into existing wired Real-time Ethernet systems.}}, author = {{Trsek, Henning}}, isbn = {{978-3-662-49157-7}}, issn = {{2522-8587}}, keywords = {{industrial wireless system, wireless real-time communication, deterministic medium access control, isochronous WLAN, industrial automation}}, publisher = {{Springer }}, title = {{{Isochronous Wireless Network for Real-time Communication in Industrial Automation}}}, doi = {{10.1007/978-3-662-49158-4}}, year = {{2016}}, } @inproceedings{4303, abstract = {{The increasing demand to customize products affects production workers in many industries, as assembly tasks become more complex due to higher product variety. Assistive systems providing instructions at the workplace have been proposed to overcome increasing cognitive demand during assembly tasks. Commercially available assistive systems provide spatially registered instructions, either by using in-situ projections or head-mounted displays (HMDs). As there is little empirical knowledge about the individual advantages and disadvantages of both approaches, we are interested in comparing both types of systems. Through a user study at a manual assembly workplace, we compare both approaches to a paper baseline. Our results reveal that both in-situ instructions and paper instructions lead to significantly faster task completion times and significantly fewer errors than HMDs. Using additional questionnaires and interviews, we are able to identify the shortcomings of HMD-based instructions and discuss the possibilities of using flexible in-situ instructions for worker assistance.}}, author = {{Büttner, Sebastian and Funk, Markus and Sand, Oliver and Röcker, Carsten}}, booktitle = {{9th ACM International Conference on PErvasive Technologies Related to Assistive Environments (PETRA '16) }}, isbn = {{978-1-4503-4337-4}}, keywords = {{Spatial Augmented Reality, Industrial Augmented Reality, Projection-based Augmented Reality, Head-Mounted Display, Manufacturing, Assistive System}}, location = {{Corfu; Greece }}, pages = {{1--8}}, publisher = {{ACM}}, title = {{{Using Head-Mounted Displays and In-Situ Projection for Assistive Systems : A Comparison}}}, doi = {{10.1145/2910674.2910679}}, year = {{2016}}, } @inproceedings{593, abstract = {{Due to the increased individualization of customer demands in the last 20 years, the production systems are required to be more flexible and scalable. It is the samefor the material flow system with automated guided vehicles (AGVs). To realize the flexibility and scalability, it is recommended to decentralized control the vehicles. As an attempt, a concept of swarm intelligence with Radio Frequency Identification (RFID) is proposed and introduced in this article. The concept is supposed to be used for automated guided vehicle systems in which objects have to be transported from place to place. Therefore the object has to be self-organized and has to manage its own transport. In this context the vehicles have to choose the most optimal transportation. Swarm intelligence is a topic which deserves a high level of attention as a method to realize high flexibility and scalability.}}, author = {{Cantauw, Alisa Maria and Li, Li}}, booktitle = {{Department of Production Engineering and Management}}, editor = {{Villmer, Franz-Josef and Padoano, Elio}}, isbn = {{978-3-946856-00-9}}, keywords = {{Swarm intelligence, Automated guided vehicle system, RFID, Internet of things, Multi-agent system}}, location = {{Lemgo}}, number = {{1}}, pages = {{133--143}}, title = {{{Application of Swarm Intelligence for Automated Guided Vehicle Systems}}}, year = {{2016}}, } @inproceedings{2128, abstract = {{We present the concept of a perceptive motor in terms of a cyber-physical system (CPS). A model application monitoring a knitting process was developed, where the take-off of the produced fabric is controlled by an electric motor. The idea is to equip a synchronous motor with a smart camera and appropriate image processing hard- and software components. Subsequently, the characteristics of knitted fabric are analysed by machine-learning (ML) methods. Our concept includes motor-current analysis and image processing. The aim is to implement an assistance system for the industrial large circular knitting process. An assistance system will help to shorten the retrofitting process. The concept is based on a low cost hardware approach for a smart camera, and stems from the recent development of image processing applications for mobile devices [1–4].}}, author = {{Vukovic, Kristijan and Simonis, Kristina and Dörksen, Helene and Lohweg, Volker}}, booktitle = {{Conference on Machine Learning for Cyber-Physical Systems (ML4CPS)}}, keywords = {{Assistance System, Euler Number, Synchronous Motor, Image Processing System, Image Processing Method}}, title = {{{Efficient Image Processing System for an Industrial Machine Learning Task}}}, doi = {{10.1007/978-3-662-48838-6_8}}, year = {{2015}}, } @article{2140, abstract = {{Recent industrial applications are implemented in a modular way, resulting in flexibility during the whole life cycle, i.e., setup, operation, and maintenance. This applies especially to larger applications like logistic, production, and printing processes. Their modular character is resulting from the constantly increasing complexity of such installations, which makes their supervision for securing reliable operation a difficult task: the data of hundreds (if not thousands) of signal sources must be acquired, communicated, and evaluated for system diagnosis. In this contribution we summarize the challenges arising in such applications and show that distributed sensor and information fusion for modular self-diagnosis tackles these challenges. Here, we propose an innovative distributed architecture encompassing intelligent sensor nodes, self-configuring real-time communication networks, and a suitable sensor and information fusion system for condition monitoring. New challenges arise in the context of distributed information fusion systems, which are identified and to which an outlook on future solutions is provided. A number of these solutions have already been discovered, implemented, and are evaluated in the context of a demonstrator, which resembles a real-world printing application.}}, author = {{Mönks, Uwe and Trsek, Henning and Dürkop, Lars and Geneiß, Volker and Lohweg, Volker}}, issn = {{0957-4158}}, journal = {{Mechatronics}}, keywords = {{Cyber-physical systems, Information fusion, Fusion system design, Intelligent sensors, Self-configuration, Intelligent networking}}, number = {{34}}, pages = {{63--71}}, publisher = {{Elsevier}}, title = {{{Towards distributed intelligent sensor and information fusion}}}, doi = {{10.1016/j.mechatronics.2015.05.005}}, year = {{2015}}, } @inproceedings{427, abstract = {{Für Länder mit hohen Lohnkosten eignen sich aus wirtschaftlichen Gründen hauptsächlich hochautomatisierte Montagekonzepte. Für Niedriglohnländer hybride oder ausschließlich manuelle Montagesysteme. Ein ideales Montagekonzept ist so gestaltet, dass es durch wandlungsfähige Eigenschaften beide Ländertypen mit wenig Änderungsaufwand abdecken kann. Der Beitrag behandelt Möglichkeiten und Ansätze, um solch ein wandlungsfähiges, hybrides Montagesystem zu gestalten und erläutert die Realisierung ausgewählter Methoden an einem hybriden Montagesystem der Continental AG.}}, author = {{Hrdina, Jan and Gamber, Thilo Gerhard}}, booktitle = {{ Verantwortung für die Arbeit der Zukunft, Frühjahrskongress der Gesellschaft für Arbeitswissenschaft}}, isbn = {{978-3-936804-18-8}}, keywords = {{hybrides System, Montagesystem, Niedriglohnland, Montagekonzept, hybrides Montagesystem}}, location = {{Karlsruhe}}, publisher = {{GfA-Press}}, title = {{{Einsatz von Methoden der Wandlungsfähigkeit bei einem hybriden Montagesystem}}}, year = {{2015}}, } @inproceedings{665, abstract = {{The requirements of assembly systems are changing, due to trends such as shorter innovation and product lifecycles as well as an increase in the number of product variants and product customization. Certain markets are characterized by demand volatility and short delivery schedules. As a result of shortened product and innovation lifecycles and demand volatility, the assembly system design should be versatile. The aim of this paper is to demonstrate a versatile assembly system which was jointly developed by the Fraunhofer IOSB-INA and the Ostwestfalen-Lippe University of Applied Sciences. }}, author = {{Hinrichsen, Sven and Jasperneite, Jürgen and Schrader, Florian and Lücke, Benedikt}}, booktitle = {{Production Engineering and Management}}, editor = {{Villmer, Franz-Josef and Padoano, Elio}}, keywords = {{Assembly System, Versatility, Modularity}}, location = {{Lemgo}}, number = {{10}}, pages = {{37--45}}, publisher = {{Hochschule Ostwestfalen-Lippe}}, title = {{{Versatile Assembly Systems - Requirements, Design Principles and Examples}}}, year = {{2014}}, } @inbook{10068, abstract = {{Currently, cities are confronting a multitude of challenges including climate change, demographic change, urbanization and land subsidence. Resulting flooding, droughts and other disturbances could lead to water shortages, severe interruptions, hydraulic problems or underutilization of water infrastructure systems. One way that cities can become more resilient is by diversifying their water resources and reducing their dependency on central water infrastructures. Water infrastructure systems consisting of decentral or semi-central partial systems would be more resilient because a failure in these systems would only affect a small part of the urban area. Instead of an incremental improvement of the water infrastructure, there is a need for system innovations that will allow an adaptive development to changing conditions and which will ensure that future sustainability challenges are met. However, moving towards more resilient water technologies is seen as controversial for built-up areas. To answer the question if a transformation to a more resilient water infrastructure in built-up areas is feasible (technically and economically), a balancing and assessment of the corresponding effects have been done by way of comparing a “transformation” scenario with a reference scenario “business as usual”. If one takes a long-term period of observation (70 years), the costs balance of the scenarios “reference” and “transformation” both turn out to be on a comparative level. By contrast, the consumption of environmental resources in the scenario “transformation” is almost twice as low as in the “reference”.}}, author = {{Schramm, Engelbert and Felmeden, Jörg}}, booktitle = {{Resilient Cities 2 : Cities and Adaptation to Climate Change – Proceedings of the Global Forum 2011 }}, editor = {{Zimmermann, Karl Otto}}, isbn = {{978-94-007-9776-5}}, issn = {{2211-2790 }}, keywords = {{Climate change, Eco-efficiency analysis, System innovations, Vulnerability, Water infrastructure}}, location = {{Bonn}}, pages = {{177–186}}, publisher = {{Springer Dordrecht}}, title = {{{Towards More Resilient Water Infrastructures}}}, doi = {{https://doi.org/10.1007/978-94-007-4223-9_19}}, volume = {{2}}, year = {{2012}}, } @inproceedings{2102, abstract = {{Die Zustandsüberwachung erfolgt derzeit in der Regel durch Einsatz spezieller Sensorik, bspw. durch Vibrationsmessungen. Außerdem werden die Antriebe lediglich isoliert betrachtet, eine Zusammenführung anfallender Informationen eines räumlich verteilten Antriebsverbunds findet meist nicht statt. Im Folgenden wird ein neuartiges Motor-as-Sensor-Konzept vorgeschlagen und validiert, das eine antizipatorische Zustandsüberwachung ohne Einsatz zusätzlicher Sensorik allein durch Verarbeitung der phasenbezogenen Motorströme ermöglicht. Zusätzlich wird ein Informationsfusionskonzept vorge-stellt, das die Informationen aller im Verbund beteiligten Antriebe zusammenführt, um darüber eine mit weniger Unsicherheiten behaftete Aussage über den Zustand einer Ap-plikation herbeizuführen. Das Hauptaugenmerk liegt hierbei insbesondere auf der Beherrschung der anfallenden riesigen Datenmengen, die zur Verarbeitung in eingebetteten Systemen reduziert werden müssen.}}, author = {{Voth, Karl and Dicks, Alexander and Lohweg, Volker}}, keywords = {{Sensor- und Informationsfusion, elektrischer Antrieb, Cyber-Physical System, Industrie 4.0, Big Data}}, title = {{{Konfliktlösende Informationsfusion zur Maschinendiagnose am Beispiel von Extrusionsanlagen, 21. Workshop Computational Intelligence, VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA), 30. November - 02. Dezember 2011, Dortmund}}}, year = {{2011}}, } @inproceedings{4489, abstract = {{In this paper we delineate and compare the functional and structural potential but also shortcomings of two Ambient Assisted Living (AAL) systems, which aim at providing remote care for elder adults living independently at home. One system, a personal emergency response system, is already in use, the other system, the Future Care Lab, presents a holistic tele-medical care setting, which is currently in its conceptualization and test phase at RWTH Aachen University. By learning from the experience with a well-established system in both, restrictions and benefits, implications for a user-centred development for future telemedical systems can be derived.}}, author = {{Beul, Shirley and Klack, Lars and Kasugai, Kai and Möllering, Christina and Röcker, Carsten and Wilkowska, Wiktoria and Ziefle, Martina}}, booktitle = {{Electronic Healthcare}}, editor = {{Szomszor, Martin and Kostkova, Patty }}, isbn = {{978-3-642-23634-1 }}, keywords = {{eHealth, Ambient Assisted Living Telemonitoring, Telecare, Future Care Lab, Personal Emergency Response System, PERS}}, location = {{Casablanca, Morocco}}, pages = {{111--118}}, title = {{{Between Innovation and Daily Practice in the Development of AAL Systems: Learning from the Experience with Today’s Systems}}}, doi = {{10.1007/978-3-642-23635-8_14}}, volume = {{69}}, year = {{2010}}, } @inproceedings{486, abstract = {{Growing market demands on enterprises and the resulting challenges for their organization have been discussed for many years now. The flexibilty and mutability of an enterprise are thereby considered as a significant factor for success.}}, author = {{Zülch, Gert and Gamber, Thilo Gerhard and Stock, Patricia}}, booktitle = {{Advances in Production Management Systems}}, editor = {{Olhager, Jan and Persson, Fredrik}}, isbn = {{978-0-387-74157-4}}, keywords = {{production planning and control, decision-making system, personnel-oriented simulation}}, location = {{Linköping}}, pages = {{337--344}}, publisher = {{Springer}}, title = {{{Methodology for the Analysis of Simulation-Based Decision-Making in the Manufacturing Area}}}, year = {{2007}}, } @inproceedings{4813, abstract = {{This paper presents a formative multi-method evaluation on future gaming systems. Following a scenario-driven approach, quantitative and qualitative methods are employed to elicit feedback from different target user populations. Based on the results of the different evaluation parts, a set of design requirements for future home entertainment systems is derived. These requirements are then used to guide the development process of a ubiquitous computing gaming platform. To demonstrate the usefulness of the gaming platform, a sample application is discussed, which is described in the last section of this paper.}}, author = {{Röcker, Carsten and Magerkurth, Carsten and Haar, Maral}}, booktitle = {{Universal Access in Ambient Intelligence Environments : 9th ERCIM Workshop on User Interfaces for All}}, editor = {{Stephanidis, Constantine and Pieper, Michael}}, isbn = {{978-3-540-71024-0}}, keywords = {{User Interfaces, Pervasive Games, Evaluation, System Development, Tangible User Interfaces, Human Computer Interaction}}, location = {{Königswinter (Bonn), Germany}}, pages = {{352--368}}, publisher = {{Springer}}, title = {{{User Interfaces for Pervasive Games: Experiences of a Formative Multi-Method Evaluation and its Implications for System Development}}}, doi = {{10.1007/978-3-540-71025-7_23}}, volume = {{4397}}, year = {{2006}}, }