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2006 IEEE International Conference on Industrial Informatics, INDIN'06

作者： Qi, Zhiliang Schäfer, Christian Klemm, Peter Software and Systems Engineering for Production Automation Robert Bosch GmbH Robert-Boseh-Strasse 2 D-71701 Schwieberdingen Germany Institute for Control Engineering of Machine Tools and Manufacturing Units University Stuttgart Seidenstrasse 36 D-70174 Stuttgart Germany

ISBN: (纸本)0780397010

Development of assembly systems is a multidisciplinary mechatronic engineering process. In each engineering discipline one or more engineering tools are applied to support the discipline-specific engineering tasks. These engineering tools manage the engineering data distributed and in different formats. A big amount of these engineering data are needed to be shared between the engineering tools. Today data exchange across different engineering tools can only take place through a limited nummer of proprietary interfaces and in a limited scope. Most of the shared engineering data is inputted manually and repetitively. This causes often an incorrect and inconsistent data management. Reuse and consistency of these engineering data across the whole development process is a major challenge in today's mechatronic engineering. This paper presents a new approach of modeling an extensible multidisciplinary information system (EMIS) in order to manage the shared engineering data for the entire engineering of assembly systems. Each applied engineering tool needs only one tool-specific interface to exchange the shared engineering data with the EMIS automatically. © 2006 IEEE.

关键词： Electronic data interchange

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Interdisciplinary Data Exchange in the Development of Assembly Systems

Interdisciplinary Data Exchange in the Development of Assemb...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： Zhiliang Qi Christian Schafer Peter Klemm Software and Systems Engineering for Production Automation Robert Bosch GmbH Schwieberdingen Germany Robert Bosch GmbH Gerlingen-Schillerhohe Baden-WÃ¼rttemberg DE Institute for Control Engineering of Machine Tools and Manufacturing Units University Stuttgart Stuttgart Germany

Development of assembly systems is a multidisciplinary mechatronic engineering process. In each engineering discipline one or more engineering tools are applied to support the discipline-specific engineering tasks. These engineering tools manage the engineering data distributed and in different formats. A big amount of these engineering data are needed to be shared between the engineering tools. Today data exchange across different engineering tools can only take place through a limited number of proprietary interfaces and in a limited scope. Most of the shared engineering data is inputted manually and repetitively. This causes often an incorrect and inconsistent data management. Reuse and consistency of these engineering data across the whole development process is a major challenge in today's mechatronic engineering. This paper presents a new approach of modeling an extensible multidisciplinary information system (EMIS) in order to manage the shared engineering data for the entire engineering of assembly systems. Each applied engineering tool needs only one tool-specific interface to exchange the shared engineering data with the EMIS automatically.

关键词： Assembly systems Data engineering Mechatronics Data models Systems engineering and theory engineering management Electromagnetic interference Maintenance engineering Software tools Manufacturing automation

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Real-time simulation environment for machine-tools

Real-time simulation environment for machine-tools

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作者： Röck, S. Rüdele, H. Pritschow, G. Institute for Control Engineering Machine Tools and Manufacturing Units Stuttgart Germany

ISBN: (纸本)9780415390620

By taking advantage of the ever increasing capabilities of information systems, simulation technology can nowadays be applied to very complex systems. This paper outlines the development of an integrated environment that allows simulation of machine-tools in real-time. Both the kinematic and dynamic behaviour of the simulated machine-tools can be analysed. The numerical algorithms used for solving the corresponding differential equations were optimised for their real-time capabilities, hence the simulation environment can be utilised in hardware-in-the-loop configurations. Thus it is possible to operate the real motion control system in combination with the simulation environment. The paper discusses the software architecture of the simulation environment, its numerical nucleus and its well-defined interfaces. Finally specific usage scenarios for the simulation environment are described and analysed in regard to the benefit they provide for the stake holders. © 2005 Taylor & Francis Group.

关键词： machine tools

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Sensor systems in shape adaptive structures for smart airfoils

Sensor systems in shape adaptive structures for smart airfoi...

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International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)

作者： W. Wadehn G. Pritschow Institute for Control Engineering of Machine Tools and Manufacturing Units( ISW) Stuttgart Germany

The use of new multifunctional material systems with integrated actuators and sensors combined with new control concepts has paved the way for active structures which can adapt their properties due to changing objective functions such as their geometry, stiffness or external loads. In the paper, the requirements and a new actuation system for changing the geometry of the airfoil of a fixed wing aircraft with shape memory alloys are discussed. This new actuation system is a system with distributed actuators which lead to new questions for the placement of sensors and suitable control concepts. Some results of experimental tests are presented. They provide a first feasibility proof of the concept and encourage further work.

关键词： Sensor systems Adaptive systems Automotive components Actuators control systems Geometry Intelligent sensors Aircraft Shape memory alloys Testing

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Simulation of Adaptive Structures with Shape Memory Alloys

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IFAC Proceedings Volumes 2000年第26期33卷 775-780页

作者： Günter Pritschow Wolf Wadehn Gerhard Kehl Institute for Control Engineering for Machine Tools and Manufacturing Units (ISW) Seidenstr. 36 D-70174 Stuttgart phone: 0049 +711-121-2421

New multifunctional material systems with integrated actuators and sensors combined with new control concepts have cleared the way for adaptive structures which can change their properties (such as their geometry) due to external conditions. Because of the complex interaction of the components of adaptive structures there is the need for new simulation tools which are able to describe the complete system. In this paper different simulation methods for the conception of adaptive structures with Shape Memory Alloys (SMA) will be compared. Some results of simulations as well as of experimental tests are presented. With the new simulation system it is possible to evaluate the structure combined with the actuation effect and control concepts.

关键词： Actuators Adaptive systems Aircraft control Finite Element Method Hardware Structure Systems Shapes Simulation State Space Models

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Reducing distortions caused by the welding arc in a laser stripe sensor system for automated seam tracking

Reducing distortions caused by the welding arc in a laser st...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： K. Hang G. Pritschow Inst. for Control Eng. of Machine Tools & Manuf. Stuttgart Univ. Germany Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) University of Stuttgart Stuttgart Germany

Although laser vision systems for the automation of complicated arc welding processes have been available as commercial products since the mid 1980s, industrial breakthrough has not yet taken place. Up to now unreliability and high prices prevent potential users from investing in this innovative technology. The reliability and accuracy of triangulation based laser stripe sensors are significantly reduced by the characteristics of the open welding arc such as bright light, spatter and fumes that distort the sensor's camera signal. First steps to reduce these impacts are mechanical shielding, optical bandpass filters and increased laser power. The paper's first part discusses the results of experimental investigations carried out to quantify the efficiency of these physical measures. Although a significant reduction can be obtained, these physical measures do not eliminate all distortions caused by the welding arc. Therefore new algorithms to filter out the remaining distortions are discussed. Improvements are also quantified using experimental data. Finally new hardware platforms to realize these new algorithms are investigated. Powerful solutions such as parallel-DSP-boards or transputers should be avoided as they are too expensive. Therefore the suitability of conventional PC-processors and FPGAs (field programmable gate arrays) is investigated.

关键词： Welding Laser noise Optical distortion Band pass filters Distortion measurement Field programmable gate arrays machine vision Automation Power system reliability Mechanical sensors

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A data acquisition system for machine tool condition monitoring .2. Some of the signals acquired

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QUALITY AND RELIABILITY engineering INTERNATIONAL 1996年第1期12卷 19-26页

作者： Drake, PR Jennings, AD Grosvenor, RI Systems Engineering Division Cardiff School of Engineering University of Wales Cardiff PO Box 917 Newport Road Cardiff CF2 1XH U.K. Paul Drake:has a B.Sc. in Statistics an M.Sc. in Systems Engineering and a Ph.D. in Fault Diagnosis from the University of Wales. He gained several years experience of developing information systems while working in industry. At present he is a lecturer in Systems Engineering at the Cardiff School of Engineering within the University of Wales Cardiff. He is an active researcher in the field of machine condition monitoring and fault diagnosis in collaboration with industrial partners. He is also involved in the application of artificial intelligence techniques within manufacturing. He is a Chartered Engineer and a member of the Institution of Electrical Engineers. July 1994 saw the publication of a book entitledCondition Based Maintenance and Machine Diagnosticsof which he was co-author. Alun Jennings:has a B.Sc. in mechanical engineering from Portsmouth Polytechnic and an M.Sc. from Manchester University. He is a chartered mechanical engineer with experience in fault diagnosis and product development. Currently he is employed as a research associate at Laser Zentrum Hannover. Roger Grosvenor:is an IT lecturer in Systems Engineering at the Cardiff School of Engineering within the University of Wales Cardiff. His teaching covers reliability engineering instrumentation and measurement and digital control. His main research interests are in-process measurement on machine tools and condition monitoring of machine tools. Prior to his ten years at UWCC he was a development engineer in the heating and ventilation industry. He holds a B. Eng. in mechanical engineering and an M. Eng. both from the University of Wales and is a member of the Institute of Measurement and Control.

This paper presents some of the machine tool condition monitoring signals logged by the data acquisition system (DAS) designed and implemented as part of the European Union research project BREU-CT91-0463. Cause and effect relationships between machine components and signal features are highlighted, along with a demonstration of the suitability of vibration signal kurtosis as a measure of machine tool spindle bearing condition.

关键词： condition monitoring machine tools

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Line moments and invariants for real time processing of vectorized contour data 8th

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8th International Conference on Image Analysis and Processing, ICIAP 1995

作者： Lambert, Georg Gao, Hua Control System Theory and Robotics Dept. Technical University of Darmstadt Landgraf-Georg-Str.4 Darmstadt Germany Institute of Production Engineering and Machine Tools Technical University of Darmstadt Petersenstr. 30 Darmstadt64287 Germany

ISBN: (纸本)3540602984

In this article a new concept for real time analysis of images based on the vectorized contours is presented. Given the polygone approximation of contours the geometric moments can be formulated for line contours. The resulting line moments (LM’s) can be calculated for an arbitrary collection of contour fragments. Neither the existence of an area nor a closed contour is prerequisite to characterize an object by line moments. Due to these properties of the LM’s time consuming preprocessing of noisy object contours is not required. Even objects with structured surfaces can be characterized by LM’s. The formalism to apply the geometric moments to contour patterns is derived. A direct and a recursive algorithm to efficiently compute the LM’s is given. As an application of the LM’s an analysis system for structured textures is presented and results are discussed. © Springer-Verlag Berlin Heidelberg 1995.

关键词： Computers

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A PLANNING APPROACH FOR ROBOT-ASSISTED MULTIPLE-BENT PROFILE HANDLING

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ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING 1994年第1期11卷 35-40页

作者： ZUSSMAN, E HORSCH, T Institute of Machine Tools and Manufacturing Technology Technical University of Berlin 1000 Berlin 10 Pascalstr. 8-9 Germany Control System Theory and Robotics Group Institute of Control Engineering Darmstadt Institute of Technology 6100 Darmstadt Landgraf-Georgstr. 4 Germany

This paper describes a solution for the general problem of handling a multiple-bent profile of sheet metal in the constrained environment of a bending machine. The handling device is a robot feeding the machine and handling the sheet metal in between the bending operations. A new planning approach for a multiple-bent profile handling which is based on the configuration space and a potential function is presented. Special heuristics for the multiple-bent profile are applied and accelerate the motion planning process by recognition of the critical part of the profile and its orientation and position relative to the bending machine. This approach assists the sheet metal part planner to plan in advance the handling operations and to confirm if the robot can perform the handling or not. Two examples of handling multiple-bent profiles inside a bending machine are described and demonstrate the overall approach by a simulation.

关键词： Industrial robots

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Automated optimization in the design process of a magnetically levitated table for machine tool applications

Automated optimization in the design process of a magnetical...

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作者： Banucu, Remus Albert, Jan Reinauer, Veronika Scheiblich, Christian Rucker, Wolfgang M. Hafla, Alexander Huf, Alexander Institute for Theory of Electrical Engineering University of Stuttgart 70569 Stuttgart Germany Institute for Control Engineering Machine Tools and Manufacturing Units University of Stuttgart 70174 Stuttgart Germany

A novel magnetically levitated work piece table has been designed. This device is able to perform linear and rotational motions in four axes with high accuracy, so that different operations can be run on the work piece. Numerical simulations support the design of this table. Since the table's motion is idle in a certain range, simulations have to be run for a high number of potential positions. When optimizing the device's layout by varying different parameters, simulations are needed for all positions in which the device shows an extreme behavior. The numerousness of simulations leads to very high efforts concerning pre- and post-processing. Therefore, a new software is developed, which fully automates the whole design process consisting of drawing, meshing, calculating, and optimizing the magnetically levitated table. © 2006 IEEE.

关键词： machine tools

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