Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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  • Publication
    Resilienz durch Redundanz. Cloud-und Edge-basierte Echtzeitsteuerung von autonomen mobilen Robotern
    ( 2021)
    Nouruzi-Pur, J.
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    Lambrecht, J.
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    Nguyen, T.D.
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    Vick, A.
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    Krüger, J.
    Die Auslagerung von Algorithmen auf Edge- und Cloud- umgebungen nach dem Software-as-a-Service-Paradigma bringt viele Vorteile für autonome mobile Roboter mit sich. Es kann jedoch nicht immer garantiert werden, dass die QoS-Anforderungen der ausgelagerten echtzeitkritischen Funktionen erfüllt sind. Das Bereitstellen von redundanten Kommunikationsmöglichkeiten und Berechnungsknoten sowie robotergesteuertes Umschalten ermöglichen Echtzeitfähigkeit innerhalb dieser unsicheren Infrastrukturen.
  • Publication
    Motion Tracking Applied in Assembly for Worker Training in different Locations
    ( 2016)
    Müller, B.C.
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    Nguyen, T.D.
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    Dang, Q.-V.
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    Duc, B.M.
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    Seliger, G.
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    Krüger, J.
    ;
    Kohl, H.
    In cooperation between a German and a Vietnamese manufacturing laboratory, activities of training for assembly are performed by support of motion tracking at similar workplaces. The assembly of bicycle e-hubs is trained with Vietnamese students to check the transfer of assembly process knowledge between distant countries. The experimental set-up consists of the remote ""teach-in"" of assembly instructions, motion tracking on workplaces and the evaluation of student's performance. The applicability of motion tracking vs. traditional paper based instructions for initial learning is investigated.
  • Publication
    Adapting Ergonomic Assessments to Social Life Cycle Assessment
    ( 2016)
    Chang, Y.-J.
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    Nguyen, T.D.
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    Finkbeiner, M.
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    Krüger, J.
    In Social Life Cycle Assessment (SLCA), the health and safety aspect of workers is usually evaluated by considering the numbers of injuries and accidents; however, the work related musculoskeletal disorders (MSDs), which dominate occupational diseases, are often neglected in SLCA since the effects do not occur immediately. Thus, the MSDs lead to increased working absences and compensation costs, and also reduced productivity of workers. To address the gap, applying ergonomic assessment is proposed since it identifies and quantifies the health risks at work based on a set of pre-defined criteria e.g. force, posture, repetition and duration, and provides the numeric results analyzing the physical load and their sources. In the study, the application of ergonomic assessment and its indicators in SLCA is displayed to screen risks and to further improve working place design.
  • Publication
    The working posture controller: Automated adaptation of the work piece pose to enable a natural working posture
    ( 2016)
    Nguyen, T.D.
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    Bloch, C.
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    Krüger, J.
    We present a novel approach to prevent awkward working posture by automatically assessing and optimising the work place for a given task. Our system is called the Working Posture Controller (WPC) and enables to accomplish tasks in a natural posture by adapting the pose of work piece to be processed. Unlike other approaches to prevent posture-related Musculo-skeletal Disorders (MSDs), our system is able to propose an immediate adjustment in the process neither requiring tedious manual planning nor expert knowledge. Additionally, the proposed solution is personalised to the anthropometry of the user. First experiments on a simulated height-adjustable platform reveal promising results.
  • Publication
    Adaptive Qualification and Assistance Modules for Manual Assembly Workplaces
    ( 2015)
    Nguyen, T.D.
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    McFarland, R.
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    Kleinsorge, M.
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    Krüger, J.
    ;
    Seliger, G.
    Enterprises must be able to make decisions for increasing process effectiveness and efficiency in view of shrinking natural resources. A globalised work force has to be made aware of the challenges in resource scarcity and material wealth. Special attention has also to be paid on health and safety at work due to recent demographic developments. We present two solutions based on human motion capture technology which can improve efficiency while enabling ergonomic working, thus addressing challenges in sustainable manufacturing. With a qualification module, intuitive work descriptions can be generated and distributed. An assistance module automatically adjusts the workplace to enable working in a comfortable pose. First tests regarding our qualification module show the ability to implicitly convey knowledge during simple working tasks. Studies on the assistance module show its capabilities to predict what test subjects working at the workplace would consider as configuration for ""comfortable"" and ""ergonomic"" working.
  • Publication
    Automated vision-based live ergonomics analysis in assembly operations
    ( 2015)
    Krüger, J.
    ;
    Nguyen, T.D.
    Manual analysis and optimisation of ergonomic parameters can be tedious when process and worker's body size variance is high. Automating this process would reduce workload and enable developing assistance systems for worker support. This paper presents a system which computes the positions of the parts of the body from input depth images and assesses ergonomics scores. The method is based on Particle Swarm Optimisation (PSO). By parallel processing on graphics hardware (GPU), the system is able to provide ergonomic feedback within a few seconds.