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Software Architecture Companion (ICSA-C)

作者： Ronny Seiger Uwe Assmann Steffen Huber Software Technology Group Technische Universität Dresden Dresden Germany Technische Universitat Dresden Dresden Sachsen DE Institute of Machine Tools and Control Engineering Technische Universität Dresden Dresden Germany

The application of workflow technologies in the context of Internet of Things (IoT) presents a young and vibrant research field. Introducing a dedicated workflow layer on top of typical software architectures to model and execute repetitive tasks among IoT devices, systems and services facilitates the flexibility, reuse, configuration and programming of processes in the IoT. In this work we present the PROtEUS IoT workflow management system (WfMS) and its application for automating typical processes in a Smart Home case *** conduct various experiments to show the systemâ€™s capabilities and suitability to be used as an IoT WfMS interacting with sensors, actuators, robots, humans and smart objects. PROtEUS integrates components for dynamic service selection, complex event processing, human interactions and self-adaptation, which makes it a WfMS able to cope with new IoT-related challenges.

关键词： Task analysis Robot sensing systems Smart homes Engines Switches

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Methodology for the early analysis and evaluation of the resource efficiency of process chains for manufacturing hybrid structures

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Procedia Manufacturing 2019年 33卷 430-437页

作者： C. Symmank J. Boll A. Rautenstrauch A. Graf L. Markov R. Decker A. Schmidt U. Götze B. Awiszus V. Kräusel D. Landgrebe L. Kroll Professorship of Management Accounting and Control Chemnitz University of Technology Thüringer Weg 7 09126 Chemnitz Germany Professorship Virtual Production Engineering Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz Germany Professorship for Forming and Joining Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz Germany Department of Lightweight Structures and Polymer Technology Chemnitz University of Technology Reichenhainer Straße 31/33 09126 Chemnitz Germany Fraunhofer Institute for Machine Tools and Forming Technology IWU Reichenhainer Straße 88 09126 Chemnitz Germany

To ensure a successful development of resource-efficient and sustainable technologies, products, and production processes, it is essential to support R&D activities in early design stages. Thus, amongst others an appropriate assessment should be accomplished, which captures the high complexity and interdependencies of process chains, considers the technological feasibility, the energetic and economic benefit as well as the robustness as facets of resource efficiency, and hence, serves as a basis for deriving impulses for R&D activities. A promising evaluation methodology for such assessments is the Multidimensional Evaluation Method for Process Chains of HybrId Structures (MEMPHIS). In this paper, MEMPHIS is outlined and illustrated for an innovative process chain for producing hybrid laminates with sensor functionality. As a result, the paper will contribute to the further development of the methodology, show its applicability, and provide insights into the innovative technology.

关键词： cost effectiveness energy efficiency hybrid assembled composites robustness sustainable manufacturing processes

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Rent'n'Produce: A Social Media Platform for Cloud Manufacturing

Rent'n'Produce: A Social Media Platform for Cloud Manufactur...

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2017 4th International Conference on Smart Materials and Nanotechnology in engineering (SMNE 2017)

作者： Carsten Ellwein Oliver Riedel Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart

Social media platforms have revolutionized communication and web-users behavior in the past. The cloud manufacturing paradigm is doing the same for job order and contract manufacturing in the present. This paper examines the similarities of both concepts and introduces a platform that can be perceived as a cloud manufacturing and a social media platform. Hereby, a more user-centered design was achieved to ensure user-acceptance.

关键词： Cloud manufacturing Social media

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Structure Model Based Correction of Thermally Induced Motion Errors of machine tools

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Procedia Manufacturing 2017年 14卷 128-135页

作者： Xaver Thiem Bernd Kauschinger Steffen Ihlenfeldt TU Dresden Institute of machine tools and control engineering Helmholtzstraße 7a 01069 Dresden Germany

The article describes a correction approach for thermally induced motion errors of machine tools that utilizes physically based models of the thermal and thermo‐elastic behavior of machine tools. After a classification and presentation of the functional principle of the model based approach functional core aspects, possible implementation variants and resulting requirements regarding the control are clarified. Examples are presented for which the functionality of the approach was proved and evaluated as well as compared to other model based thermal correction approaches.

关键词： thermal error machine tool correction compensation structure model control online

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Compensation for tool deformation and expansion in virtual try-outs of hot stamping tools

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IOP Conference Series: Materials Science and engineering 2018年第1期418卷

作者： Lars Penter Steffen Ihlenfeldt Norbert Pierschel Institute of Machine Tools and Control Engineering TU Dresden Dresden 01062 Germany Fraunhofer Institute for Machine Tools and Forming Technology Chemnitz 09126 Germany

The mechanical properties of hot-stamped parts strongly depend on the tool's cooling performance. The cooling rate hinges on sufficient temperature gradients and on an excellent contact conductance between tool and workpiece. A uniform distribution of the contact pressure is the key to an even cooling behaviour, and hence, a homogenous micro structure of the formed part. Elastic deformations of machine and tool components under load are a major influence on the pressure distribution between tool surface and hot-stamped part. This applies to hot and cold forming tools. An additional difficulty in hot stamping are superimposed thermal expansions and contractions of the tool, which also affect the part's mechanical properties due to their influence on the normal contact pressure. Manual die spotting needs to compensate for all these undesired effects and makes tool try-out a large time and money-consuming factor in the development of hot forming tools. This paper presents methods to transform the spotting of hot forming tools into a virtual production reality in order to reduce manual labour and lower costs. It gives details on the numerical compensation of tool surfaces for elastic tool and machine deformations and for temperature-induced tool expansions and contractions. The authors critically analyse necessary and achievable accuracies of computed surfaces and point out required improvements for the future implementation of virtual try-outs into tool development and manufacturing processes.

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Workpiece and machine Design in Additive Manufacturing for Multi-Axis Fused Deposition Modeling

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Procedia CIRP 2017年 60卷 229-234页

作者： Frederik Wulle Daniel Coupek Florian Schäffner Alexander Verl Felix Oberhofer Thomas Maier Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstr. 36 Stuttgart 70174 Germany Institute for Engineering Design and Industrial Design Pfaffenwaldring 9 Stuttgart 70569 Germany

Additive Manufacturing (AM) technologies require innovative design paradigms and guidelines that exhaust the offered freedoms in geometry and material. The aim of the Design for Additive Manufacturing is to provide design opportunities and to enhance workpiece properties taking into account constraints of the process, e.g. kinematics and limitations of print technology. Most AM applications are constrained to three-axis movements limiting the fabrication of workpieces layer by layer to one fixed building direction only. This causes limitations of strength properties, surface quality and the need of supporting structures. Multi-axis AM enables completely new design possibilities going beyond current optimization and design strategies of conventional AM workpieces. This innovation requires multiple design and manufacturing changes in the internal and external geometry of the workpiece as well as in machine and printing head technology. This paper identifies the requirements and capabilities of multi-axis AM and presents possible solutions to overcome the identified challenges. Preliminary results for multi-axis AM are described on an exemplary workpiece.

关键词： Additive Manufacturing Design optimization machine tool Polymer

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Environment modeling for maintenance automation-a next-best-view approach for combining space exploration and object recognition tasks

Environment modeling for maintenance automation-a next-best-...

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IEEE International Conference on Automation Science and engineering (CASE)

作者： Christian Friedrich Viktor Zielke Marc Toussaint Armin Lechler Alexander Verl Institute of Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart Germany Institute of Machine Learning and Robotics University Stuttgart Stuttgart Germany

In order to enable robot systems to solve complex tasks autonomously, it is essential to model the environment in a sufficient way. This work describes a new approach to create a consistent environment model, using next-best-view planning which combines the optimization of the space exploration and the object recognition task. The approach is designed for the automation of maintenance tasks, which is a challenging task for autonomous robotic systems. After a general overview of the developed system, we explain the theoretic foundations for building a consistent environment model which can be used for manipulation planning. The concept is validated by means of application-oriented examples.

关键词： Solid modeling Maintenance engineering Automation Robot sensing systems Planning

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Automated Planning of Robotic MAG Welding Based on Adaptive Gap Model

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Procedia CIRP 2017年 62卷 612-617页

作者： Alexander Kuss Thomas Dietz Felix Spenrath Alexander Verl Fraunhofer Institute for Manufacturing Engineering and Automation IPA Nobelstrasse 12 70569 Stuttgart Germany Institute for Control Engineering of Machine Tools and Manufacturing Units ISW University of Stuttgart Seidenstrasse 36 70174 Stuttgart Germany

This paper proposes a novel approach for automated planning of robotic MAG welding processes based on an adaptive gap model. The gap model describes the relation between welding parameters and a changing gap geometry resulting from deviations of relative part locations in a welding assembly. A matching process is performed between computer-aided design model and a measured point cloud of the welding assembly using an Iterative Closest Point algorithm to compute the actual gap geometry. Experimental validation for various gap geometries is demonstrated with an industrial robot equipped with stereo camera and welding gun indicating an increased weld quality.

关键词： Robot Welding Adaptive planning

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Erratum to “A Review of Research Aspects of Redundantly Actuated Parallel Robots for Enabling Further Applications” [Jun 18 1259-1269]

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IEEE/ASME Transactions on Mechatronics 2018年第5期23卷 2531-2531页

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

In paper, “A review of research aspects of redundantly actuated parallel robotsw for enabling further applications,” (Mostashiri, N. et al),IEEE/ASME Trans. Mechatronics,” vol. 23, no. 3, pp. 1259–1269, Jun. 2018,... 详细信息

关键词： Manipulator dynamics Parallel robots Actuators Kinematics

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Online calibration of industrial robots using inertial sensors 47

Online calibration of industrial robots using inertial senso...

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47th International Symposium on Robotics, ISR 2016

作者： Vieler, Hendrik Lechler, Armin Grimm, Jochen Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart Germany

ISBN: (纸本)9783800742318

Industrial Robots typically have an absolute accuracy in the range of millimeters and a repeatability in the range of tenths of a millimeter. The absolute accuracy can be improved towards the repeatability of the robot by calibration. The calibration values change over time for several reasons. On the long term it can be influenced by wear, crashes and maintenance, on the short term it is mainly influenced by temperature drift. State of the art calibration is done offline at fixed times. In this paper a method for online calibration of robots for medium accuracy and an online verification for high accuracy using inertial sensors is proposed. © 2016 VDE VERLAG GMBH Berlin Offenbach.

关键词： Industrial robots

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