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检索条件"机构=Institute for Control Engineering of Machine Tools and Manufacturing"

共 743 条记录，以下是81-90 订阅

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Online Parameterization of a Milling Force Model using an Intelligent System Architecture and Bayesian Optimization 55

Online Parameterization of a Milling Force Model using an In...

引用

55th CIRP Conference on manufacturing Systems, CIRP CMS 2022

作者： Schmucker, B. Trautwein, F. Hartl, R. Lechler, A. Zaeh, M.F. Verl, A. Institute for Machine Tools and Industrial Management Iwb Technical University of Munich Boltzmannstr. 15 Garching85748 Germany Institute for Control Engineering of Machine Tools and Manufacturing Units ISW University of Stuttgart Seidenstr. 36 Stuttgart70174 Germany

This paper presents an efficient and industry-ready system architecture that enables both the control of machining operations and the high-frequency acquisition of controller data and external sensor signals. Using the recorded data, a dexel-based mechanistic cutting force model, which enables the estimation of cutting forces for complex tool geometries in arbitrary machining operations, is parameterized via an instantaneous cutting force identification method. In the introduced identification method, Bayesian Optimization and Dynamic Time Warping are combined to avoid time-consuming and error-prone synchronization of measurement and simulation. The suitability of this approach was demonstrated by performing cutting experiments at various radial depths of cut and feed rates per tooth. Thereby, a good agreement between simulation and measurement could be observed. © 2022 The Authors. Published by Elsevier B.V.

关键词： Data Analytics Industry 4.0 machine tools Process Simulation

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Requirements and Challenges in the Configuration of a Real-Time Node for OPC UA Publish-Subscribe Communication

Requirements and Challenges in the Configuration of a Real-T...

引用

International Conference on Mechatronics and machine Vision in Practice (M2VIP)

作者： Rebekka Neumann Christian von Arnim Michael Neubauer Armin Lechler Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

Factory automation is evolving from a hierarchical structure towards an interconnected architecture in which systems at different levels can communicate seamlessly with each other. This requires an appropriate replacement of proprietary fieldbus systems in the automation sector. A promising solution to implement cross-plane end-to-end real-time capable communication between computing nodes is proposed in literature. The usage of Open Platform Communication Unified Architecture (OPC UA) as the information model with the Publish-Subscribe (PubSub) communication mechanism in combination with Time Sensitive Networking (TSN) is presented to fulfill the requirements for message transmission. In contrast to the state of the art of configuring fieldbus systems, the configuration of such a real-time communication node has to be done manually. This process is complex, as deep knowledge in different domains is required. In this work we elaborate the requirements for such a communication node and present the resulting implementation challenges, which can be used as the basis for a configuration tool.

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Safeguarded Continuous Deployment of control Containers through Real-Time Simulation

Safeguarded Continuous Deployment of Control Containers thro...

引用

International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Moritz Walker Lars Klingel Stefan Oechsle Michael Neubauer Armin Lechler Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

Static configurations and slow adaption to changing requirements characterize today’s production systems. In order to cope with variable external influences, these systems need to become more flexible. One building block towards meeting this requirement from the software perspective is employing quality-preserving processes to develop and update automation applications. While this condition applies to classical automation applications, it is increased if Software-defined manufacturing (SDM) is applied. Containers can be used to deploy software through orchestration. Orchestration covers initial deployment and the roll-out of new software versions. This makes it in theory possible to deploy automation applications, such as computerized numerical control (CNC) software. However, available tools from information technology cannot be used to orchestrate and update automation applications, as real-time requirements must be considered. This work presents an approach that supports orchestration, specifically the deployment and update process, of real-time containers safeguarded by real-time capable simulation coupled with the control system during the operation phase. It shows how to achieve the right timing for real-time software updates and how to prevent causing damage by observation and safeguarding through information obtained from the real-time simulation. Using real-time simulation in the operating phase, container-based control and real-time orchestration become safer and more applicable in industrial manufacturing systems.

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Reflection-based Prototyping Framework for OPC UA Servers for Companion Specifications

Reflection-based Prototyping Framework for OPC UA Servers fo...

引用

IEEE International Conference on Industrial Technology (ICIT)

作者： Moritz Walker Christian von Arnim Michael Neubauer Armin Lechler Oliver Riedel Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

Domain-specific Companion Specifications (CS) define OPC UA information models for specific use cases, devices, or industries and define how to use OPC UA in specific environments. A sample OPC UA server is required to evaluate an OPC UA CS and develop clients. Such a server needs to be easily changed on updates of the CS and must ensure that all instances comply with the specified OPC UA types. This paper introduces an OPC UA server prototyping framework that maps OPC UA instances to $\mathbf{C++}$ data types using reflection. Using OPC UA types for instantiation, all created instances comply with the CS. The mapping to $\mathbf{C++}$ data structures provides a simplified API for handling sample instances by enabling users with limited knowledge about OPC UA to build CS-conformant servers. Four use cases show the usefulness of the approach: OPC UA Events, OPC UA PubSub and creating CS compliant servers.

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Simulation-Based Predictive Real-Time Collision Avoidance for Automated Production Systems

Simulation-Based Predictive Real-Time Collision Avoidance fo...

引用

IEEE International Conference on Automation Science and engineering (CASE)

作者： Lars Klingel Alexander Heine Steven Acher Niklas Dausend Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

The usage of simulation technology is deeply established in the development and commissioning of automated production systems. Impending collisions of moving kinematics, such as robots, can therefore already be detected with the help of simulations before the production system goes into operation. However, changes in the control software of production systems that occur in the operating phase are often not secured, which entails risk, especially in the age of cyber-physical and adaptive production systems. This work presents a predictive simulation-based approach for the online collision avoidance of automated production systems by enabling virtual commissioning simulations for the application in the operating phase. This allows a cost-efficient way to achieve the safe operation of production systems without the need of additional configurations and sensors.

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Isolating Shared Resources for Time-Triggered Networking of Containerized Applications

Isolating Shared Resources for Time-Triggered Networking of ...

引用

International Conference on Mechatronics and machine Vision in Practice (M2VIP)

作者： Christian von Arnim Moritz Walker Armin Lechler Oliver Riedel Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

Multiple real-time applications can share a real-time network using the Time Division Multiple Access (TDMA) scheme. For TDMA to be effective, each real-time application respects or is forced to respect its assigned network access slots. Container-based virtualization is one way of using common hardware for real-time applications. However, while methods for time isolation of computing resources such as CPU, memory bandwidth, and cache are available, there is still a lack of mechanisms for node-level network access isolation of multiple containers sharing a TDMA-based real-time network. This work qualitatively and quantitatively compares five approaches for achieving shared network resources for time-triggered real-time applications using prototypical implementations. Approaches compared include mandatory access control, proxying, iptables, extended Berkeley packet filtering, and virtualized process sand-boxing.

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Evaluation of Isolation and Communication Mechanisms for Real-Time Containers

Evaluation of Isolation and Communication Mechanisms for Rea...

引用

IEEE International Symposium on Industrial Electronics (ISIE)

作者： Moritz Walker Marc Fischer Armin Lechler Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

The use of lightweight methods for virtualization has potential for control technology, such as increased update rates and an extension of control systems with value-added services. A programmable logic controller (PLC) is no longer a closed system but extensively offers interfaces to the outside. The trends towards decentralization, highly flexible systems, and a flattening of the automation pyramid create new requirements that classic control architectures need to meet. In this context, a high degree of integration between components with simultaneous temporal and spatial isolation is crucial. This paper addresses the conception of an isolation mechanism for the extension of the control functionality by value-added services. The basis for this is a combination of a partitioning hypervisor and software containers, which was chosen based on an evaluation of current isolation mechanisms for container solutions. Different messaging-based approaches with a common API for communication between components are developed and evaluated.

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Ambiguity tolerant commissioning ontology: Targeting client communication

Ambiguity tolerant commissioning ontology: Targeting client ...

引用

2021 IEEE International Conference on engineering, Technology and Innovation, ICE/ITMC 2021

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

ISBN: (纸本)9781665449632

There are various standards for the description of geometrical data, in terms of computer-aided design, as well as for the description of manufacturing processes. However, there is a lack in a data model that allows a product to be described partly by its geometry and partly by the description of the manufacturing process;whereby both forms of description are to be regarded as equivalent. Such a model would greatly facilitate communication in contract and job order manufacturing, especially in the computer-aided outsourcing of orders according to the cloud manufacturing paradigm. In this paper, this kind of data model is further justified and one ontological description, in compliance with existing standards, is introduced. © 2021 IEEE.

关键词： Ontology

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Modeling and Identification of Load-Dependent Properties for Electrically Preloaded Rack-and-Pinion Drives

Modeling and Identification of Load-Dependent Properties for...

引用

European control Conference (ECC)

作者： Valentin Leipe Lukas Steinle Xabier Agirre Bikuña Armin Lechler Alexander Verl Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart Germany Mondragon Unibertsitatea - Faculty of Engineering Arrasate-Mondragon Spain

ISBN: (数字)9783907144107

ISBN: (纸本)9798331540920

Rack-and-pinion drives are preferred feed drives for long travel distances and heavy loads in large machine tools. One of the advantages compared to other feed drive systems is consistent stiffness regardless of travel length. A primary challenge with rack-and-pinion drives is the achievable accu-racy due to backlash. To compensate for backlash, electrically preloaded systems are commonly used in machine tools. In the case of electrical preload between two motors, the system is more complex to identify because the feed drive specific properties cannot be directly assigned to the respective drive train. To address this issue, this paper presents a novel method for modeling and identifying the load-dependent stiffness and damping of an electrically preloaded system. For this purpose, a mathematical modeling based on experimental data from a test bench with industrial components is presented to separate the drive train specific properties. This allows the system behavior to be modeled more accurately and used for control approaches.

关键词： Damping Accuracy Drives Motors Mathematical models Data models machine tools

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Definition and Description of Matrix Production Systems 57

Definition and Description of Matrix Production Systems

引用

18th IFAC Workshop on Time Delay Systems, TDS 2024

作者： Ranke, Daniel Trierweiler, Michael Berkhan, Patricia Münnich, Marc Bauernhansl, Thomas Fraunhofer Institute for Manufacturing Engineering and Automation IPA Nobelstr. 12 Stuttgart70569 Germany Institute of Industrial Manufacturing and Management IFF Nobelstr. 12 Stuttgart70569 Germany Fraunhofer Institute for Machine Tools and Forming Technology IWU Reichenhainer Straße 88 Chemnitz09126 Germany

The industry's use of adaptable production systems, such as matrix production, is increasing. However, these systems vary in their specific details. The lack of a unified definition, delimitation, and description hinders comparability and the transfer of lessons learned between different systems. This paper aims to propose a comprehensive definition of matrix production and differentiation between different implementation forms. To achieve this, the paper first examines existing approaches to define and describe production systems and their manifestations. Various frameworks and models have been proposed in the literature, but they often focus on specific aspects of production systems, neglecting the complexity of matrix production. The paper identifies common elements and challenges in defining and describing production systems by analyzing these approaches. A second investigation analyzes various existing descriptions of matrix production from the scientific literature. While some definitions focus on the organizational structure, others emphasize operational aspects. By synthesizing these definitions, the paper proposes a comprehensive definition of matrix production encompassing both dimensions. Furthermore, the paper includes cases of industrial implementations as a third investigation. These cases provide insights into the practical application of matrix production systems across different industries. The paper identifies common characteristics, challenges, and benefits associated with matrix production by analyzing these implementation examples. Finally, all three investigations are combined to create a unified definition and a complementary descriptive model. The proposed framework provides a systematic approach to define and describe matrix production systems. It allows for a better understanding and comparison of different implementations, facilitates the transfer of lessons learned, and promotes the exchange of best practices. This framework will enable r

关键词： Production efficiency

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