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A control model for downstream compensation strategy in multi-stage manufacturing systems of complex parts

IFAC-PapersOnLine 2019年第13期52卷 1473-1478页

作者： Magnanini, Maria Chiara Eger, Florian Reiff, Colin Colledani, Marcello Verl, Alexander Dipartimento di Meccanica Politecnico di Milano Milano Italy Institute for Control Engineering of Machine Tools and Manufacturing Units ISW University of Stuttgart Stuttgart Germany

The capability of delivering high-quality products with the required service level is a key factor for competitiveness in manufacturing companies. Zero-Defect Manufacturing control strategies aim at ensuring these targets grounding on the combination of knowledge extraction from the process and advanced statistical tools. This work presents the approach proposed within the EU-funded project ForZDM for selected use-cases in different industrial sectors characterized by multi-stage manufacturing systems and high-value complex parts. The control model is proposed and the overall control strategy is presented with respect to the state-of-the-art solutions, in order to show a comprehensive methodology integrating the joint product-system quality-oriented approach. © 2019, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Adaptive control systems Defects Statistical mechanics Statistical process control Adaptive control Compensation strategy High quality products Manufacturing companies Manufacturing control strategies Multi stage manufacturing systems Variation models Zero defects

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FabOS: Towards an open, distributed, real-time-capable, and secure operating system for production

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Procedia CIRP 2021年 104卷 962-967页

作者： Martin Lukas Daniel Stock Akos Csiszar TRUMPF Werkzeugmaschinen GmbH & Ko. KG Johann-Maus-Straße 2 71254 Ditzingen Germany Fraunhofer Institute for Manufacturing Engineering and Automation IPA Nobelstraße 12 70569 Stuttgart Germany Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstr. 36 70174 Stuttgart Germany

Software is rapidly becoming more important for the manufacturing sector. To address the need for software solutions in this sector, various organizations have published reference architectures, standards and implementations. The research project FabOS aims at building an open, distributed, secure and real-time capable software backbone for the manufacturing industry. This paper details the requirements for such a system and analyzes and compares several existing commercial and academic reference architectures, standards and implementations for Industry 4.0 applications. The goal is to identify the gaps between the already existing technology and the manufacturing industry’s need for the factories of the future.

关键词： Architecture IIoT cyber-physical systems IaaS PaaS

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Beyond Model-Based Systems engineering towards Managing Complexity 30

Beyond Model-Based Systems Engineering towards Managing Comp...

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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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Part Variation Modeling to Avoid Scrap Parts in Multi-stage Production Systems

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Procedia CIRP 2022年 107卷 851-856页

作者： Florian Eger Stefan Oechsle Colin Reiff Maria Chiara Magnanini Philipp Tempel Armin Lechler Alexander Verl Marcello Colledani Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Seidenstrasse 36 Stuttgart 70174 Germany Politecnico di Milano Department of Mechanical Engineering Via la Masa 1 Milan 20156 Italy Laboratoire des Sciences du Numérique de Nantes (LS2N) UMR CNRS 6004 École Centrale de Nantes 1 Rue de la Noë 44321 Nantes France

Manufacturing systems for today's products are complex systems requiring a variety of different processes in order to be able to manufacture all necessary part features. This also applies to the production of rotating components, which have experienced increasing demand at the latest due to the growth in mobility. As in almost every manufacturing process, quality-reducing defects can occur due to deviations for example tool wear, which cannot always be avoided. Those, that have accumulated from previous process steps can cause the occurrence of superimposed defects. This leads to complex relationships between quality defects in the end product and the numerous parameters of the manufacturing processes. To remain competitive, production must be optimized in order to identify defects as early as possible, as well as their dependencies and variation patterns. The paper presents an approach to identify and model part variations within multi-stage production systems. Subsequently, based on a detected deviation, a downstream compensation strategy can be proposed at an early stage of the manufacturing process, which uses the capability of the overall system to fundamentally eliminate rejects.

关键词： Zero-defect Manufacturing Defect Compensation Multi-stage Production System Downstream Compensation

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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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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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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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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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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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Cloud manufacturing: Theoretical localization within production theory

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Procedia CIRP 2021年 99卷 555-560页

作者： Robert Henzel Carsten Ellwein Georg Herzwurm Oliver Riedel University of Stuttgart Graduate School of Excellence advanced Manufacturing Engineering (GSaME) Nobelstr. 12 70569 Stuttgart Germany Germany Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Seidenstr. 36 D-70174 Stuttgart Germany University of Stuttgart Chair of Information Systems II Keplerstr. 17 70174 Stuttgart

The industrial production landscape is significantly affected by digitization. In the course of this development, various production paradigms have been proposed, such as ubiquitous manufacturing, distributed manufacturing or, most recently, cloud manufacturing. A selective discussion and interpretation of these similar concepts remains in the literature as a research gap. Following the call for research, the aim of this paper is to distinguish the concept of cloud manufacturing from neighboring production paradigms and to locate it within the theory. This goal will be achieved by means of a literature analysis as well as argumentation based on it and finally presented graphically.

关键词： Ubiquitous manufacturing Distributed manufacturing Cloud manufacturing

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