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

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Industrial powerline communication for machine tools and industrial robots

Industrial powerline communication for machine tools and ind...

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2013 IEEE 17th International Symposium on Power Line Communications and Its Applications, ISPLC 2013

作者： Joao, Lopes Karl-Heinz, Wurst Alexander, Verl Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Seidenstraße 36 70174 Stuttgart Germany

ISBN: (纸本)9781467360166

machine manufactures are facing a challenging moment: on one hand the need to lower the prices, on the other hand the need for more machine flexibility and availability. In this context, Industrial Powerline Communication (IPLC) can play a capital role, by reducing the costs and increasing flexibility. In this paper the requirements and constraints of Powerline Communication (PLC) and Industrial Communication are merged and a solution to this problem proposed. This solution consists of a ferrite filtering, with the task of building a Daisy Chain Network topology on top of a PLC bus. © 2013 IEEE.

关键词： Industrial robots

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Properties of a Double Nut Ball Screw with a Passive Spring-Loaded Mechanism for Preload Adjustment 57

Properties of a Double Nut Ball Screw with a Passive Spring-...

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18th IFAC Workshop on Time Delay Systems, TDS 2024

作者： Jud, Oliver Steinle, Lukas Lechler, Armin Verl, Alexander University of Stuttgart Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstr. 36 Stuttgart70174 Germany

Preloaded ball screws are the preferred choice for high-precision linear motion of feed axes in machine tools. In order to compensate for the loss of preload over the service life and to maintain the typical operating characteristics such as zero backlash and high rigidity, ball screw drives are commonly provided with an excessively high initial preload. However, this leads to increased wear and friction. In this paper, an approach for a spring-loaded mechanism for automatic preload adjustment is presented and investigated in order to keep the required preload approximately constant during operation over the entire service life. © 2024 The Authors.

关键词： Ball screws

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Graph-based Data Model for Assembly-Specific Capability Description for Fully Automated Assembly Line Design 2

Graph-based Data Model for Assembly-Specific Capability Desc...

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2nd IEEE Eurasia Conference on IOT, Communication and engineering, ECICE 2020

作者： Brovkina, Daniella Riedel, Oliver Stuttgart70569 Germany The Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart70174 Germany

ISBN: (纸本)9781728180601

Assembly systems are an essential component of industrial production. However, due to a lack of tools for decision-making support, these systems are usually planned and designed manually or with a low degree of automation. In this paper, a data model and a fully automated system for the design of assembly lines in the context of Model-based System engineering (MBSE) are presented. This system uses a graph-based description of the product and production capabilities, matches the product requirements to the available capabilities and resources, and enables an appropriate design generation using the Model-in-the-Loop and Software-in-the-Loop simulations. Explicit semantics and high flexibility of the graph-based data model allow a fine-grained description of the highly complex system. A particular focus is on the assembly-specific capability and product description, and generalizability of assembly systems through the use of the presented data model. For the data model evaluation, several scenarios are presented, where the production capabilities are being matched to a product description to form a logic assembly line structure. © 2020 IEEE.

关键词： Assembly

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Method for generating manufacturable, topology-optimized parts for laminated layer manufacturing 53

Method for generating manufacturable, topology-optimized par...

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53rd CIRP Conference on manufacturing Systems, CMS 2020

作者： Helfesrieder, Nico Lechler, Armin Verl, Alexander University of Stuttgart Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstraße 36 Stuttgart70174 Germany

The great flexibility provided by generative manufacturing offers immense potential for the structural component optimization. However, this freedom needs to be utilized by appropriate CAx tools. In this paper, we present a novel slicing method, enabling the automatic generation of topology-optimized Laminated Layer manufacturing (LLM) parts. With this method a part of arbitrary shape can be automatically sliced and equipped with a uniform virtual grid that is suitable for manufacturing. The optimal density distribution is then mapped onto the individual slices and locally approximated through the introduction of variably shaped cavities. By using 3D modeling techniques all LLM sheets are modeled parametrically and assembled automatically. To verify the functionality of the presented method, it is applied to two practical parts and compared with a conventional topology optimization method. © 2020 The Authors.

关键词： Topology

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Analysis and evaluation of collision detection libraries for collision monitoring of multichannel control applications 22

Analysis and evaluation of collision detection libraries for...

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22nd International Conference on Production Research, ICPR 2013

作者： Hoher, Simon Neher, Philipp Verl, Alexander University of Stuttgart Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstraße 36 Stuttgart70174 Germany

The main objective of this paper is to evaluate collision detection libraries for collision monitoring of multichannel control applications. First, the requirements for collision monitoring of multi-channel control will be presented. On this basis suitable collision detection libraries will be analyzed and selected considering the required feature range. The assumed libraries are then evaluated in regard to their runtime characteristics. In particular the time-intensive memory accesses at runtime and the time deterministic and efficient execution times during different experiments are examined in more detail on a real-time platform.

关键词： Libraries

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Comparative Analysis of Factory Simulation Description Models for Comprehensive Description of Model Design 2

Comparative Analysis of Factory Simulation Description Model...

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2nd IEEE Eurasia Conference on IOT, Communication and engineering, ECICE 2020

作者： Brovkina, Daniella Kienzlen, Annika Riedel, Oliver Stuttgart70569 Germany The Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Stuttgart70174 Germany

ISBN: (纸本)9781728180601

Simulation models are used during the entire life cycle of a factory. Because of a factory's complexity, different simulation tools with different scope emerged over time. The holistic mapping requires coupled simulations that consider the factory from different perspectives. Each simulation requires a new tool and simulation model, which, up to now, has usually been created manually. This paper presents an analysis of existing approaches and data models for factory simulation description. These approaches allow data exchange between single simulation models, but do not provide dynamic coupling and model generation, and often cannot include all relevant information for the factory simulation. To achieve a continuous and comprehensive factory simulation, a concept for a metamodel for factory simulation description is outlined. Its goal is not only to describe a skeleton of the factory and provide simulation coupling and data exchange but also to provide a dynamic model generation. © 2020 IEEE.

关键词： Electronic data interchange

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Predicting coupling signals in a material flow real-time co-simulation with a Kalman filter 13

Predicting coupling signals in a material flow real-time co-...

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13th CIRP Conference on Intelligent Computation in manufacturing engineering, CIRP ICME 2019

作者： Kienzlen, Annika Scheifele, Christian Verl, Alexander University of Stuttgart Institute for Control Engineering of Machine Tools and Manufacturing Units Seidenstr. 36 Stuttgart70174 Germany

A hardware-in-the-loop simulation has to use the control cycle as simulation clock. This time-deterministic clocking can be difficult to meet for complex behavior models in a real-time simulation. To accelerate a real-time simulation, the calculation can be parallelized by co-simulation whereby multiple, differently detailed behavior models can be simulated parallelly. In these multi-scale models, a slower, detailed model guides a fast, abstract model. In this work, a Kalman filter is examined as a multi-rate method to predict the signals of a physical-based model for a material flow simulation in real-time. To improve the results, smoothing and boundary conditions are added. © 2020 The Authors.

关键词： Kalman filters

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Assembly Process Model for Automated Assembly Line Design 3

Assembly Process Model for Automated Assembly Line Design

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3rd IEEE Eurasia Conference on IOT, Communication and engineering, ECICE 2021

作者： Brovkina, Daniella Riedel, Oliver Stuttgart Germany University of Stuttgart Fraunhofer Institute for Industrial Engineering Iao The Institute for Control Engineering of Machine Tools and Manufacturing Units Stuttgart Germany

ISBN: (纸本)9781665445160

Automated assembly line design faces multiple challenges. One of those challenges is the automation of resource selection, especially when heterogeneous machines are used. In this paper, a data model for the skill definition of heterogeneous machines is presented. The data model is based on state-of-the-art concepts and focuses on the standardization of capability representation. The data model is validated using different machines that can be employed within an assembly system. A particular focus is put on pick and place operations by structurally and logically different machines as typical assembly operations. Furthermore, the presented and validated data model is abstracted to define a generic assembly process model. The resulting model is a key to a fully automated matching of machines and processes that is required for product assembly within automated resource selection. © 2021 IEEE.

关键词： Automation

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Matching Algorithm for Automated Resource Selection within Assembly Line Design 3

Matching Algorithm for Automated Resource Selection within A...

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3rd IEEE Eurasia Conference on IOT, Communication and engineering, ECICE 2021

ISBN: (纸本)9781665445160

Despite all the technological progress and digitalization of manufacturing processes, assembly lines and their design are still far from the ideas of the fourth industrial revolution. The assembly planning process has high complexity and is still done manually or only partially automated. One of the biggest challenges is resource selection to automatically identify all the machines that can perform the required assembly process. Based on previous works, this paper presents a matching algorithm for an automated resource selection within a fully automated assembly design platform. This platform uses a set of graph-based models at its core: an assembly feature model for product structure representation, a standardized skill model, and a highly abstract process model. The resulting matching algorithm uses concepts of graph isomorphism and homomorphism for graph analysis to universally identify matches between skill definitions and processes. © 2021 IEEE.

关键词： Assembly

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Model-based automatic generation of digital twin models for the simulation of reconfigurable manufacturing systems for timber construction 55

Model-based automatic generation of digital twin models for ...

引用

55th CIRP Conference on manufacturing Systems, CIRP CMS 2022

作者： Kaiser, Benjamin Reichle, Alexander Verl, Alexander Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Seidenstr. 36 StuttgartD-70174 Germany

Reconfigurable manufacturing systems adapt to changing requirements and therefore offer a solution to the challenges associated with increasing product variety and shorter product life cycles. This is especially helpful in the prefabrication in timber construction, as components and requirements vary widely between projects. However, reconfigurations must be quick to keep downtimes short. The planning of reconfigurations is a complex problem where digital twins and simulation models of the manufacturing systems are necessary for simulation and validation. In our timber prefabrication use case, building components and requirements change from project to project, and the manufacturing system needs to reconfigure frequently. The building components and the configuration of the manufacturing system are designed simultaneously during a co-design process to ensure the integrity of the manufacturing process in a changing manufacturing environment. Hence, this may require many iterations of the planning process. Each iteration needs validation through a simulation. However, the manual generation of simulation models is time-consuming and error-prone and thus poses an obstacle for the digital planning phase. This paper addresses this issue and presents a model-based approach to generate simulation models for reconfigurable manufacturing systems. Our system and its components are modeled in automation markup language as this domain-specific language allows us to model not only kinematics and geometry but also behavior, skills, and interfaces to check the compatibility of components. We apply the method to our use case with the IntCDC wood prefabrication system. The proposed method builds a component graph for a configuration of the manufacturing system and generates the required packages for the simulation in Gazebo and ROS. To build simulation models automatically, we apply model-to-model and model-to-text transformation techniques. The proposed method is suitable for integr

关键词： AutomationML IntCDC Reconfigurable manufacturing System ROS Simulation Software Defined manufacturing Timber Prefabrication URDF

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