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30th CIRP Design on Design, CIRP Design 2020

作者： Masior, Jonathan Schneider, Benjamin Kürümlüoglu, Mehmet Riedel, Oliver Fraunhofer Institute for Industrial Engineering IAO Nobelstrasse 12 Stuttgart70569 Germany University of Stuttgart Institute for Human Factors and Technology Management IAT Nobelstrasse 12 Stuttgart70569 Germany University of Stuttgart Institute for Control Engineering of Machine Tools and Manufacturing Units ISW Seidenstrasse 36 Stuttgart70174 Germany

systems engineering domain lacks in methodologies for integration of development artefacts (e.g. requirements, functions, geometrics, or behavior) and enterprise models (e.g. organizational structures, processes, or IT infrastructure). Especially the rising complexity driven by integrated product service systems, smart services, systems of systems and cyber physical systems (CPS) leads to a new paradigm further on called Advanced systems engineering (ASE). It empowers enterprises to cope with such complex developments. The employment of ASE technologies in design and manufacturing enterprises requires a reachability of technical information and continuity along vertical and horizontal dimensions. A widely used approach to implement this is Model-based System engineering (MBSE). This paper introduces a solution to achieve the goals of manufacturing excellence as well as complexity management by identifying and analyzing relevant requirements and possible approaches for an innovative simulation enabling and executable modelling language, the so-called advanced MBSE+. © 2017 The Authors. Published by Elsevier B.V.

关键词： Cyber Physical System

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Static Characteristics of Fire Hose Actuators and Design of a Compliant Pneumatic Rotary Drive for Robotics

Static Characteristics of Fire Hose Actuators and Design of ...

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2020 IEEE/RSJ International Conference on Intelligent Robots and systems (IROS)

作者： Johannes T. Stoll Kevin Schanz Michael Derstroff Andreas Pott Fraunhofer Institute for Manufacturing Engineering and Automation IPA Stuttgart Germany Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

ISBN: (数字)9781728162126

ISBN: (纸本)9781728162133

In this work, we present and explain in detail the design of a new type of pneumatic actuator made of fire hose, the fire hose actuator (FHA), see Fig. 1. We model the force output of this type of actuator and we compare the theoretic results to the data measured on the laboratory test ***, we present the design of a pneumatic rotary drive that is actuated by four of the above-mentioned FHAs. The drive unit features intrinsic compliance and it is capable of high-precision positioning. Due to these characteristics, the design concept of the rotary drive is suitable for the potential use in robotics, especially in human-robot collaboration. In addition, we model the static torque distribution of the rotary drive and we compare the theoretic results to the data measured on the realized laboratory test stand. Moreover, we discuss the most important characteristics of the rotary drive. Hence, we present measurements of the adjustable stiffness and we show that high-precision positioning is possible with the system, reaching in ideal areas every bit of the used 17-bit encoder with a resolution of 0.0027°. Moreover, the drive unit is capable of continuous rotation while the maximum continuous torque possible is found to be 63.1 Nm.

关键词： Hoses Torque Pneumatic systems Drives Position measurement Data models Torque measurement

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Model-based identification of production tolerances in battery production 54

Model-based identification of production tolerances in batte...

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54th CIRP Conference on manufacturing Ssystems, CMS 2021

作者： Thomitzek, Matthias Schmidt, Oke Abraham, Tim Cerdas, Felipe Röder, Fridolin Krewer, Ulrike Herrmann, Christoph Institute of Machine Tools and Production Technologies Department of Sustainable Manufacturing and Life Cycle Engineering Technische Universität Braunschweig Langer Kamp 19b Braunschweig38106 Germany Institute of Energy and Process Systems Engineering Technische Universität Braunschweig Franz-Liszt-Straße 35 Braunschweig38106 Germany Technische Universität Braunschweig Langer Kamp 19 Braunschweig38106 Germany Department of Electrical Energy Systems Universität Bayreuth Universitätsstraße 30 Bayreuth95447 Germany Karlsruhe Institute of Technology Adenauerring 20b Karlsruhe76131 Germany

Battery technology in combination with carbon-free energy presents a major paradigm shift for the future of the mobility and energy storage sector and already creates an immense demand for large scale battery factories. However, current battery production sites still report considerable scrap rates caused by insufficient process control and a lack of adequate production tolerances, which increase the cost and environmental impact of the battery cells. The present work introduces a methodology which assist in defining model-based production tolerances by considering the impact of varying process parameters on final cell properties in combination with production cost and cell revenue. © 2021 The Author(s).

关键词： Quality assurance

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Fully coupled wet cylindrical turning simulation using the Finite-Pointset-Method

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Procedia CIRP 2021年 102卷 43-48页

作者： Eckart Uhlmann Enrico Barth Alexander Quellhorst Tobias Seifarth Jörg Kuhnert Kaissar Nabbout Martin Sommerfeld Technische Universität Berlin Institute for Machine Tools and Factory Management (IWF) Chair of Machine Tools and Manufacturing Technology Pascalstr. 8-9 10587 Berlin Germany Fraunhofer Institute for Production Systems and Design Technology (IPK) Pascalstr. 8-9 10587 Berlin Germany Fraunhofer Institute for Industrial Mathematics ITWM Fraunhofer-Platz 1 67663 Kaiserslautern Germany Otto von Guericke University Magdeburg Institute of Process Engineering Universitaetsplatz 2 39106 Magdeburg Germany

In industrial machining operations, many turning processes are carried out under wet conditions. In contrast, most simulation tools are only suitable for dry cutting processes due to challenges of modeling fluid-structure-interactions (FSI). In this paper, a wet, fully coupled cutting simulation using the Finite-Pointset-Method (FPM) is presented and validated for industrially relevant cylindrical turning. To facilitate the required reduction of the calculation effort, different routines like adaptive numerical discretization are applied. The results indicate different cutting fluid effects like evaporation areas around the chip.

关键词： Turning Cutting fluid Simulation

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Detection of Attacks in Smart Grids via Extended Kalman Filter and Correlation Analysis

Detection of Attacks in Smart Grids via Extended Kalman Filt...

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SICE Annual Conference

作者： Julia Sawodny Oliver Riedel Toru Namerikawa Keio University Tokyo Japan Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart Germany

ISBN: (数字)9781728110899

ISBN: (纸本)9781728110905

This paper discusses the detection of attacks on decentralized and intelligent power networks, so-called smart grids. The approach used here, estimates the states of the power network, which is modelled by its power flow, via an Extended Kalman Filter. The use of this filter allows the consideration of nonlinearities, thus enabling the modelling of the losses of the systems. The final detection of attacks on a generator in a power network is realized by a correlation analysis. The correlation analysis provides the result of the inner correlation of sequential signals. Based on this, an assessment can be made as to whether or not the network is affected by an attack.

关键词： Correlation Generators Phasor measurement units Smart grids Kalman filters Reliability Load flow

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Distributed Interpolation: Synchronization of motion-controlled axes with coordination vector and decentralized segment controllers

Distributed Interpolation: Synchronization of motion-control...

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International Workshop on Advanced Motion control (AMC)

作者： Caren Dripke Daniel Schoebel Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Seidenstr. 36 Stuttgart Germany

ISBN: (数字)9781728131894

ISBN: (纸本)9781728131900

In this paper, we present an approach for a distributed interpolation which coordinates and synchronizes the movements of multiple linear axes without a central motion control unit. With this concept, axes equipped with novel individual miniature controls can achieve synchronized interpolation without a central coordination unit as a motion control or CNC present. This application is especially interesting for manufacturing setups undergoing frequent reconfigurations as the decentral setup has shorter configuration times and offers integration of multiple vendors independent of proprietary field bus communication standards thus offering reuse of automation components. We consult applications from swarm-robotics and transfer algorithms to the motion control problem. The proposed coordination algorithm is validated in a MATLAB Simulink environment, as well as a commercial four axes pick-and-place demonstrator.

关键词： Motion planning Interpolation Adaptation models Target tracking Motion segmentation Planning Synchronization

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Shop-Floor Service Connector - a message-oriented Middleware Focused on the Usability and Infrastructure Requirements of SMEs Developing Smart Services

Shop-Floor Service Connector - a message-oriented Middleware...

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IEEE International Conference on Knowledge Innovation and Invention (ICKII)

作者： Matthias Milan Strljic Chris Vollmann Oliver Riedel Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart Germany Fraunhofer Institute for Industrial Engineering IAO Stuttgart Germany

ISBN: (数字)9781728193335

ISBN: (纸本)9781728193342

Digitalization causes an intensive change in the way software components are developed within the shop floor. The blending of technology domains with current automation technologies leads to high integration efforts with a low degree of reusability. This problem is further reinforced by a diverging system understanding within individual domains and the use of heterogeneous development platforms. Existing solutions from the field of cloud computing are applied in the context of the Industrial Internet of Things (IIoT). However, these systems do not fulfill the requirements of user-friendliness, resource demands, performance, and infrastructure, which is why they are only partially suitable for the current needs of small and medium-sized enterprises (SMEs). For this purpose, the communication middleware Shop-Floor-Service-Connector (SFSC) is developed. Based on the broker-less messaging system ZeroMQ, an overlaid SFSC protocol is implemented. Subsequently, an example scenario is used to illustrate the usage of the system. Finally, the next steps for further developing the middleware are presented.

关键词： Complexity theory Technological innovation Middleware Quality of service Protocols Computational modeling Epidemics

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Integration of cyber-physical HVAC systems in Incremental manufacturing to improve Energy Efficiency and Air Quality

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Procedia CIRP 2021年 104卷 482-487页

作者： Marcus Vogt Jan Schlichter Franziska Aschersleben Tim Abraham Lars Wolf Christoph Herrmann Chair of Sustainable Manufacturing and Life Cycle Engineering Institute of Machine Tools and Production Technology Technische Universität Braunschweig Langer Kamp 19b 38106 Braunschweig Germany Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Mühlenpfordtstraße 23 38106 Braunschweig Germany Chair of Production Technologies and Process Automation Institute of Machine Tools and Production Technology Technische Universität Braunschweig Langer Kamp 19b 38106 Braunschweig Germany

Heating, ventilation and air conditioning (HVAC) systems in a production environment ensure safe and comfortable environmental conditions and require a significant amount of final energy in the industry. In this paper a complete cyber-physical HVAC system is presented, which is implemented in an incremental production environment to ensure these conditions. Incremental manufacturing is a concept for a flexible production system that combines additive manufacturing, subtractive manufacturing processes and other production technologies. With the cyber-physical HVAC system, energy efficiency, air quality and thermal conditions can be improved in the incremental production environment, by providing decision support, greater transparency and enabling model-predictive control in real time.

关键词： Cyber physical HVAC systems physical simulation model energy transparency energy efficiency air quality

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Disturbance Observer-Based controller for Mimicking Mandibular Motion and Studying Temporomandibular Joint Reaction Forces by a Chewing Robot

Disturbance Observer-Based Controller for Mimicking Mandibul...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： Naser Mostashiri Jaspreet S. Dhupia Alexander W. Verl Weiliang Xu Department of Mechanical Engineering The University of Auckland New Zealand Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Germany

ISBN: (数字)9781728167947

ISBN: (纸本)9781728167954

Study of reaction forces on temporomandibular joints (TMJs) during chewing different food materials provides useful information for diagnosis and prevention of common stomatognathic system ailments, such as the temporomandibular joint disorders. However, in-vivo study of TMJs reaction forces is complicated and invasive. Therefore, reproduction of a human subject's mandibular motion by a biologically inspired chewing robot has the potential for the invitro study of TMJs reaction forces. An active anti-disturbance controller is required to handle uncertainties and disturbances due to food-teeth interactions, unmodeled dynamics, and parameter perturbations in the chewing robot. In this paper, a disturbance observer-based controller is used to mimic a human subject's mandibular motion by the chewing robot for in-vitro measurement of the TMJs reaction forces while chewing peanuts and gum.

关键词： Conferences Mechatronics

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Factory life cycle evaluation through integrated analysis of factory elements

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Procedia CIRP 2021年 98卷 418-423页

作者： Antal Dér Lennart Hingst Alexander Karl Peter Nyhuis Christoph Herrmann Chair of Sustainable Manufacturing and Life Cycle Engineering Insitute of Machine Tools and Production Technology (IWF) Technische Universität Braunschweig Langer Kamp 19b 38106 Braunschweig Germany Institute of Production Systems and Logistics Leibniz University Hannover An der Universität 2 30823 Garbsen Germany

In consequence of the technological advances of the last few decades, factories emerged to highly complex systems that consist of numerous factory elements like production machines, technical building services and the building shell. These factory elements are characterized by individual life cycles that differ in their duration and life cycle behavior. Consequently, the factory life cycle is composed of multiple overlapping life cycles. The fact that the life cycle of some factory elements (e.g. the building shell) exceeds the life cycle of other elements over many times (e.g. of machines) presents a challenge for factory planners. In particular, factory planners struggle to understand the contribution of single factory elements on the total factory life cycle. Consequently, it is hard to systematically synchronize the inherent life cycles of a factory while adhering to manifold requirements. Against this background, the goal of this paper is to develop a methodology that supports factory planners in the evaluation of the factory life cycle. The proposed methodology enhances the understanding of how factory elements contribute to the factory life cycle and what is the current life cycle state of the entire factory. To this end, the factory system is broken down on its constituting elements. A modified failure mode and effect analysis (FMEA) is applied to assess their life cycle priority according to economic, environmental and technical criteria. The methodology is exemplarily demonstrated on a pilot scale battery production system.

关键词： Factory life cycle Factory planning Factory element Life cycle priority

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