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Model for the Client-Oriented Selection of Additive manufacturing Infrastructure based on Information gathered from Production Networks

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Procedia CIRP 2019年 84卷 322-327页

作者： Colin Reiff Frederik Wulle Florian Strieg Oliver Riedel Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Seidenstr. 36 70174 Stuttgart Germany Fraunhofer Institute for Manufacturing Engineering and Automation (IPA) Nobelstraße 12 70569 Stuttgart Germany

A significant limitation for the use of additive manufacturing (AM) processes in an industrial context is the uncertainty about possible manufacturing conditions, costs and resulting part properties related to the used machines and materials. Since a large range of processes, machines, and materials are available on the market, the choice of optimal configuration for a user-specific part is often challenging. To simplify the development and design processes and to support the respective user in production planning, an architecture is presented, which allows an estimation of manufacturing conditions of AM technologies. The system consists of a database, which contains data about available machines, materials and additional information for quality assurance. For this purpose, defined parameters of machines registered in the network are directly retrieved from the machine control via OPC-UA communication standard. Subsequently, in a logic layer, the gathered information is matched with the requested part geometry and with additional customer requirements. As a result, the user can assess the influences of his decisions regarding design, material and machine selection at an early phase of the product development process, which ensures the basic feasibility and the planned production as well as the estimation of quality and costs.

关键词： Additive manufacturing Decision making manufacturing network Production planning

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A data model for data gathering from heterogeneous IoT and Industry 4.0 applications

A data model for data gathering from heterogeneous IoT and I...

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18th International Stuttgart Symposium on Automotive and Engine Technology, 2018

作者： Strljic, Matthias Milan Tasci, Timur Schmidt, Alexander Korb, Tobias Riedel, Oliver Institute of Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Germany

ISBN: (纸本)9783658211936

Industry 4.0 (I4.0) offers the opportunity to gain a detailed insight into the current production process by means of an increased networking of production plants. This crosslinking makes it possible to record the entire state of a production plant and to trace it within a later analysis. The aim of this analysis is to optimize the monitored production process resulting from analyses of I4.0 value-adding services [1, 2]. Figure 1 schematically visualizes the information flow for such a scenario. Data from the various levels of production are collected, stored in a data storage facility and evaluated by a valueadding service pipeline. The results are integrated back into the production process as optimizations. In this work, first the requirements for such a value-adding service pipeline are determined, which results in a total of five requirements and is abbreviated with R1 to R5. Subsequently, a suitable system architecture from the Big Data area is selected in order to meet the previously established requirements and thus implement a value-adding service pipeline. The requirements R1 - R5 and the system architecture will then flow into a data model for data acquisition and transmission within the shop floor of the production. © Springer Fachmedien Wiesbaden GmbH, ein Teil von Springer Nature 2018.

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Comparison of 3D shape reconstruction methods for fiber-optic sensors 50

Comparison of 3D shape reconstruction methods for fiber-opti...

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50th International Symposium on Robotics, ISR 2018

作者： Riehs, Christopher Kleiner, Bernhard Schneider, Urs Verl, Alexander Graduate School of Excellence advanced Manufacturing Engineering Stuttgart Germany Fraunhofer Institute for Manufacturing Engineering and Automation IPA Stuttgart Germany Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Germany

ISBN: (纸本)9781510870314

A comparison of two methods for the 3D shape reconstruction of a new kind of fiber-optic sensor using Fiber Bragg Gratings (FBG) is presented. The sensors, developed at the Fraunhofer Heinrich-Hertz-institute, consists of FBGs written in the cladding of a standard 125 µm fiber. In this way, simple and cost efficient bending sensors can be produced. Shape reconstruction strategies using a single fiber, that was actively moved along an path, which shape was reconstructed, and with a fiber, that was resting, were investigated. The achievable accuracy of both methods was compared with an experimental setup. © VDE VERLAG GMBH · Berlin · Offenbach

关键词： Fiber optic sensors

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Cloud manufacturing: An Automated Literature Review

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Procedia CIRP 2019年 86卷 251-256页

作者： Carsten Ellwein Sascha Neff Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Seidenstr. 36 D-70174 Stuttgart Germany University of Stuttgart Kepplerstr.7 D-70174 Stuttgart Germany

Due to digitalization, virtualization and Industry 4.0, the structure of the manufacturing industry is changing. One result of this development is cloud manufacturing, a new manufacturing paradigm. The number of new literatures related to this topic is increasing tremendously. Therefore, cloud manufacturing degenerates into a collective term, with a wide variety of definitions and research areas emerging. On the one hand, this paper deals with an automated statistical evaluation of the literature on cloud manufacturing. On the other hand, the main research areas of cloud manufacturing are identified by a statistical evaluation of the literature keywords from three selected databases. By means of natural language processing and machine learning methods, the keywords are automatically evaluated and grouped into clusters to obtain the main research areas.

关键词： Automated literature review cloud manufacturing

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Configuration of Application Layer Protocols within Real-time I4.0 Components

Configuration of Application Layer Protocols within Real-tim...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： Frederick Prinz Michael Schoeffler Andreas Eckhardt Armin Lechler Alexander Verl Corporate Sector Research and Advance Engineering Robert Bosch GmbH Renningen Germany Engineering Automation Systems Bosch Rexroth AG Erbach Germany Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

Within the context of Industry 4.0, future production systems are expected to support mass customization up to lot size one. In order to realize the individual production processes, a changeable and consistent integration of assets from different manufacturers is required. Therefore, the concept of I4.0 components was developed. Every I4.0 component provides a so-called asset administration shell, i.e. a standardized virtual representation of its capabilities. This paper focuses on real-time I4.0 components that require a deterministic communication with bounded low-latency in-between. In contrast to non-real-time I4.0 components, Ethernet (IEEE 802.3) is enhanced by the new real-time communication technology Time-Sensitive Networking (TSN, IEEE 802.1). The basic configuration of TSN connections within the asset administration shell was already addressed by previous work. In this work, we present the configuration of application layer protocols using the example of OPC UA Publish/Subscribe (PubSub). More precisely, we outline the underlying concept and define additional submodels for the asset administration shell of real-time I4.0 components. Finally, we discuss the advantages of the presented approach in terms of changeability.

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Theoretical aspects of impedance controllers’ modularization 50

Theoretical aspects of impedance controllers’ modularizatio...

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50th International Symposium on Robotics, ISR 2018

作者： Fodor, F. Verl, A. Brisan, C. Department of Mechatronics and Machine Dynamics Technical University of Cluj-Napoca Cluj-Napoca Romania Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart Germany

ISBN: (纸本)9781510870314

This research paper depicts a modularization concept using a generic and parametrized model with purpose of development of impedance controllers for haptic interfaces designed with different topologies. Therefore, parametrization and modularization of several components within control scheme were necessary. Unambiguously, these parametrized components and modules need to be only configured for the requirements of haptic interface. The paper verifies the presented approach of generic model by using its customization for 1 and 6 Degrees of Freedom. © VDE VERLAG GMBH · Berlin · Offenbach

关键词： Haptic interfaces

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Design concept of an automated solid waste selection system 50

Design concept of an automated solid waste selection system

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50th International Symposium on Robotics, ISR 2018

作者： Boanta, Catalin Margaritescu, Mihai Verl, Alexander Brisan, Cornel Department of Mechatronics and Machine Dynamics Technical University of Cluj-Napoca Romania National Institute of Research and Development in Mechatronics and Measurement Technique Bucharest Romania Institute for Control Engineering of Machine Tools and Manufacturing Units Stuttgart Germany

ISBN: (纸本)9781510870314

The selective disposal of the solid waste represents one of the modern problems of the middle and low income cities around the globe, a problem that generates environmental hazards if it is not properly managed. Since the selective collection of the waste is still far to be achieved on a large scale, an automated selection of the waste could overcome the environmental problems generated by landfill sites. This paper presents the concept of an automated solid waste selection system composed by several sub-systems: a transportation network (a set of conveyors), an image recognition system to identify the type of transported solid waste and a waste robot disposal system that selectively grabs the unsorted waste items. Besides this, a waste disposal algorithm is developed as task planning for the robot disposal system. © VDE VERLAG GMBH · Berlin · Offenbach

关键词： Solid wastes

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Model-based method for condition monitoring and diagnosis of compressors

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Procedia CIRP 2018年 72卷 1321-1326页

作者： Tim Engelberth Daniel Krawczyk Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstr. 36 70174 Stuttgart Germany

In process industries, compressor plants provide process mediums with certain flows and pressures. Due to corrosion, wear and fouling, the plant behavior may change throughout the entire life cycle of several decades. This paper presents a new model-based method for condition monitoring and diagnosis of turbo compressors, in which the characteristic operating behavior is mainly influenced by fouling. The real-time capable method is implemented on a plant control unit and validated by Hardware-in-the-Loop simulation. Furthermore, the diagnostic result is used to automatically adapt the controller behavior. The presented approach increases the original system’s resource efficiency without reducing its robustness.

关键词： Diagnosis Condition monitoring Modelling Compressor Fouling

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Reduction of Support Structures and Building Time by Optimized Path Planning Algorithms in Multi-axis Additive manufacturing

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Procedia CIRP 2018年 67卷 221-226页

作者： Daniel Coupek Jens Friedrich David Battran Oliver Riedel Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstr. 36 Stuttgart 70174 Germany

Additive manufacturing is an emerging technology that enables new product design. However, major inhibitors are long building times and a fixed build direction of the workpieces. In this article, new optimization and path planning methods for multi-axis additive manufacturing are presented going beyond conventional three-axis systems. This includes an adaptation of the building direction and an algorithm for the special case of cylindrical axes. These methods can reduce the production time drastically by avoiding support structures and by using the integration of predefined building blocks to substitute the infill. We present both, the new manufacturing process and the necessary computation methods for optimal process and path planning. Decreasing the building time and the amount of support structures paves the way for new application domains of additive manufacturing in the future.

关键词： Additive manufacturing Multi-axis Path planning Trajectory Support structures

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Persistent data backend for OPC UA namespaces in IT infrastructures

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Procedia CIRP 2018年 72卷 174-178页

作者： Felix Kretschmer Christian von Arnim Armin Lechler Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstr. 36 70174 Stuttgart Germany

This paper presents an approach for persistent data backends for OPC UA namespaces. OPC UA as M2M protocol is used in various manufacturing machines and provides data access to e.g. sensors and setpoints. The central and persistent data storage for e.g. data-mining and condition-monitoring services in information technology infrastructures is challenging. Therefore, a holistic approach for storing OPC UA information in lightweight directory access protocol server is presented including a model for storing namespaces, information models and values in LDAP trees of scalable enterprise infrastructures to fulfil manufacturing and IT requirements in the context of Industry 4.0.

关键词： opc ua ldap it architectures data backend

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