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IASTED International Conference on Signal Processing, Pattern Recognition and Applications, SPPRA 2013

作者： Ajami, Mohamad Menevidis, Zaharya Fraunhofer IPK Institute for Production Systems and Design Technology Pascalstrasse 8-9 D-12384 Berlin Germany

In recent years, there have been a variety of attempts in research and industry to solve various problems by using the non-contact detection and interpretation possibilities of computer vision, as one image offers the floor to analyse different causes and sources in parallel. It is logical to apply an integrated approach via image and video not only to venture into new and innovative fields, but also to optimize and improve existing solutions with other sensors and to solve contemporary problems. In this paper, we will deal with the integrated approach for optimizing and improving fire detection. The detection path is going to be solely based on the colour features of household fires in addition to a colour independent feature of fire that owes to enhance the detection result. The end goal is to achieve real time fire detection and obtain a low false positive rate.

关键词： Fires

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Reference Ontologies to Support the Development of New Product-Service Lifecycle Systems

Reference Ontologies to Support the Development of New Produ...

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IFIP WG 5.7 International Conference on Advances in Production Management Systems, APMS 2014

作者： Palmer, Claire Urwin, Esmond Neil Pinazo-Sánchez, Jose Miguel Cid, Francisco Sánchez Pajkovska-Goceva, Sonja Young, Robert Ian Marr Wolfson School of Mechanical and Manufacturing Engineering Loughborough University Loughborough Leicestershire United Kingdom Ainia centro tecnológico Parque tecnológico de Valencia Avinguda de Benjamin Franklin 5-11 46980 Paterna Valencia Spain Instituto Tecnológico de Informática Camino de Vera s/n Edif. 8G Acceso B CP 46022 Valencia Spain Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstraße 8-9 10587 Berlin Germany

ISBN: (纸本)9783662447352

In competitive and time sensitive market places, organisations are tasked with providing Product Lifecycle Management (PLM) approaches to achieve and maintain competitive advantage, react to change and understand the balance of possible options when making decisions on complex multi-faceted problems, Global Production Networks (GPN) is one such domain in which this applies. When designing and configuring GPN to develop, manufacture and deliver product-service provision, information requirements that affect decision making become more complex. The application of reference ontologies to a domain and its related information requirements can enhance and accelerate the development of new product-service lifecycle systems with a view towards the seamless interchange of information or interoperability between systems and domains. This paper presents (i) preliminary results for the capture and modelling of end-user information and (ii) an initial higher level reference core ontology for the development of reference ontologies to ameliorate product-service lifecycle management for GPN. © IFIP International Federation for Information Processing 2014.

关键词： Interoperability

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MRO – Challenge and Chance for Sustainable Enterprises

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Procedia CIRP 2013年 11卷 239-244页

作者： Eckart Uhlmann Martin Bilz Jeannette Baumgarten Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstr. 8-9 10587 Berlin Germany

Maintenance, Repair and Overhaul (MRO) is acquiring increasing commercial and socio-economic significance. For products and goods with high investment costs and a long lifespan, especially in the sectors of energy and transport, a considerable portion of commercial profits are generated by after-sales services. The field has a limited scientific background, despite a high potential in the business sector for technological and scientific optimization. This is also shown in the Market and Trend Study: Maintenance, Repair and Overhaul conducted by the fraunhofer ipk in 2011. This study provides number-based and significant information about the market size, the competitive situation and future trends. This is where the fraunhofer innovation cluster MRO in Energy and Transport were applied. Technologies and solutions for the optimization of MRO processes were developed in four different fields of innovation.

关键词： Maintenance Repair Cleaning Overhaul MRO Trends Condition Monitoring Planning Processes Technologies

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Safe Physical Human-Robot Interaction with Industrial Dual-Arm Robots

Safe Physical Human-Robot Interaction with Industrial Dual-A...

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Workshop on Robot Motion and Control

作者： A. Vick D. Surdilovic J. Kruger Fraunhofer Institute for Production Systems and Design Technology IPK-Berlin Department Automation and Robotics

ISBN: (纸本)9781467355094

This paper presents methodologies and tests for the safe physical human-robot interaction in conventional position controlled and non-back driveable industrial robotic systems. The developed algorithms are based on a simplified sensor-less estimation of external forces and saturation of joint control torques to keep the effective external forces under safety level. To cope with non-linear saturation phenomena, position control compensators and path error governor have been implemented and designed to ensure smooth behaviour and preserved control performance. Being able to stop the robot arm motion when applying risky forces, as recommended by ISO 10218, the human feels subjective safe in the robot vicinity. Experiments with the PISA Workerbot dual-arm robot system illustrate feasibility and robustness of the developed algorithms.

关键词： dual-arm robot Human machine interaction joint control robotic arm control performance Safes Robot System Force Industrial

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Reference ontologies for Global Production Networks 6

Reference ontologies for Global Production Networks

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6th International Conference on Knowledge Management and Information Sharing, KMIS 2014

作者： Urwin, Esmond Neil Palmer, Claire Cutting-Decelle, Anne-Françoise Sánchez Cid, Francisco Pinazo-Sánchez, José Miguel Pajkovska-Goceva, Sonja Young, Robert Ian Marr Loughborough University Wolfson School of Mechanical and Manufacturing Engineering Loughborough Leicestershire United Kingdom Ecole Centrale de Lille Cite Scientifique CS 20048 Villeneuve D'Ascq Cedex59651 France Instituto Tecnológico de Informática Camino de Vera s/n Edif. 8G Acceso B ValenciaCP 46022 Spain Ainia Centro Tecnológico Parque Tecnológico de Valencia Avinguda de Benjamin Franklin 5-11 Paterna Valencia46980 Spain Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstraße 8-9 Berlin10587 Germany University of Geneva CUI ICLE CarougeCH 1227 Switzerland

ISBN: (纸本)9789897580505

The development and utilisation of flexible, reconfigurable Global Production Network organisations presents issues for the sharing and reuse of information and knowledge between systems and domains. The research approach put forward in this paper posits that manufacturing reference ontologies can provide the necessary underlying flexibility in a semantic-base to support interoperability. Moreover for that to be of real value to industry it needs to be commonly applicable across the breadth of manufacturing business and therefore be offered as a standard.

关键词： Interoperability

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Using a text mining tool for patent analyses: Development of a new method for the repairing of gas turbines

Using a text mining tool for patent analyses: Development of...

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Portland International Conference on Management of Engineering and technology (PICMET)

作者： Yvonne Wich Joachim Warschat Dieter Spath Antonino Ardilio Kamilla König-Urban Eckart Uhlmann Fraunhofer Institute for Industrial Engineering IAO Stuttgart Germany Fraunhofer Institute for Production Systems Design Technology IPK Berlin Germany

The content analysis of hundreds of patents during early phases of R&D processes is still complex and time consuming. Many companies avoid the analysis of patents and are not aware of the huge knowledge that might be useful for their own R&D. Therefore fraunhofer IAO developed a method for a software-based patent analysis, the so called White Spot Analysis. Core element of this analysis is the usage of a text-mining solution for the analysis of patents, especially for the analysis of problems and solutions provided by patents. This paper demonstrates the result of a White Spot Analysis: The practical example deals with the development of a new method for the repairing of gas turbines, especially the repairing of high pressure turbine blades. It is shown how the developed text-mining solution assisted the patent analysis and the idea generation process.

关键词： Patents Turbines Blades Maintenance engineering technology management Conferences Text mining

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Development and Optimization of the Die-Sinking EDM-technology for Machining the Nickel-based Alloy MAR-M247 for Turbine Components

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Procedia CIRP 2013年 6卷 180-185页

作者： E. Uhlmann D.C. Domingos Institute for Machine Tools and Factory Management IWF Technische Universität Berlin Pascalstraße 8-9 10587 Berlin Germany Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstraße 8-9 10587 Berlin Germany

In this paper, the results regarding the optimization of the die-sinking EDM-technology for the fabrication of turbine components are presented. The main objective of this work was the reduction of machining time while producing cavities with a depth of 11 mm in the alloy MAR-M247, with respect to the requirements for surface roughness and sub-surface damage. The study was conducted using graphite electrodes of three different dimensions, totalizing 12 electrodes and a total electrode area of 89.50 mm 2 . The machine tool GENIUS 1000 THE CUBE was used in the experiments and IonoPlus IME-MH was used as dielectric fluid. The design of Experiments Methods (DoE) were applied in the planning and execution of all experiments. Firstly, experiments were conducted to estimate the maximal discharge current that can be applied for fulfilling the quality criteria regarding both surface roughness and thickness of affected sub-surface, since discharge current is known as the main influencing process parameter affecting both factors. In the second stage, the process was optimized by varying following electrical parameters of the machine tool: discharge current (ie), discharge duration (ti), pause duration (t0), ignition voltage (V) and duty factor (τ). Finally, both process parameters as well as machine tool's control parameters were adjusted to achieve optimized results regarding the total machining time and electrode wear with respect to the surface requirements of produced parts. A total machining time reduction of more than 50% in comparison to the technology currently employed by the industry was achieved. Requirements on both arithmetical surface roughness as well as affected sub-surface thickness could be fulfilled. This robust technology was developed for producing the cavities in MAR-M247 and all applied methods, studied parameters as well as the results regarding machining time, electrode wear and the quality of the achieved work piece are presented.

关键词： die-sinking EDM high aspect ratio cavities high temperature resistant materials turbine components

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Investigations on Vibration-Assisted EDM-Machining of Seal Slots in High-Temperature Resistant Materials for Turbine Components

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Procedia CIRP 2013年 6卷 71-76页

Modern aircraft engines are nowadays designed with the aim of reducing fuel consumption and emission of pollutant gases as well as increasing reliability and competitiveness in the manufacturing and repair costs. These requirements on the engines result in new requirements on components and manufacturing processes, to know: application of new engineering materials, higher component temperatures, increased demands on tightness, 3-D complex shapes as well as new manufacturing technologies. EDM-machining is typically chosen for applications including complex geometries like high aspect ratio cavities in high-temperature resistant materials, since the EDM-process is independent from the mechanical properties of the processed material. This paper addresses the design and utilization of a unit composed of piezoelectric actuators for machining seal slots in turbine components. This aims the optimization of the flushing mechanisms through vertical vibration of the tool electrodes while manufacturing high aspect ratios cavities and therewith the optimization and/or reduction of both process time and electrode wear. Firstly, the piezo-unit was designed and components like piezoelectric actuators and charge amplifier were chosen, in accordance to previous defined requirements regarding vibration frequencies and amplitudes. During the experimental investigations graphite electrodes were applied. A total of twelve cavities with an aspect ratio of 12 are simultaneously machined in the material MAR-247. During the process, a harmonic longitudinal vibration of the electrodes overlapped to the machine's feed movement is realized. Both vibration amplitude and frequency were varied during the experiments, ranging from 2 μm to 16 μm and from 50 Hz to 1 kHz, respectively. The results are compared to the conventional process without vibration, while the EDM-parameters remain unaltered. By applying longitudinal vibration to the tool electrodes the material removal rate was increas

关键词： die-sinking EDM vibration-assisted EDM high aspect ratio cavities high-temperature resistant materials turbine components

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Passive Haptic Feedback for Manual Assembly Simulation

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Procedia CIRP 2013年 7卷 509-514页

作者： Néstor Andrés Arteaga Martin Victor Mittelstädt Michael Prieur Rainer Stark Thomas Bär Production oriented product validation - Daimler AG P.O. Box 2360 89013 Ulm Germany Fraunhofer Institute for Production Systems and Design Technology IPK Pascalstraße 8-9 10857 Berlin Germany

In this study movable props representing an object were used to try to achieve realistic movements of a worker during completion of a manipulation task in an assembly-like scenario recreated in a mixed reality environment. The form and the weight of the movable props were adjusted to different resemblance levels. The effect of these levels on the experiential fidelity of the worker and on the action fidelity of process observers was studied. Results showed that increasing the fidelity of the movable props does not necessarily result on better performance, e.g. simulating the weight of the actual object only seems to improve the experience if the prop also resembles the form of the actual object. Further study is suggested to better understand the effect of other factors.

关键词： Manual Assembly Simulation Assembly Planning Assembly Verification Motion Capture Mixed Reality.

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Visualization of virtual reality neurological motor rehabilitation of the upper limb — A systematic review

Visualization of virtual reality neurological motor rehabili...

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International Workshop on Virtual Rehabilitation

作者： Luara Ferreira dos Santos Henning Schmidt Jörg Krüger Christian Dohle Rehabilitation Robotics Group (IPK/TU Berlin) DFG Research Training Group prometei Technische Universität Berlin Berlin Germany Dept of Automation Technology Fraunhofer Institute for Production Systems and Design Technology (IPK) Berlin Germany Dept of Neurological Rehabilitation University of Potsdam Germany

Most virtual rehabilitation environments rely on visual feedback. However, little is known on the optimum characteristics of these feedbacks. Here, we present first results of a systematic literature review to assess and compare visual feedback types in virtual reality (VR) based neurological motor rehabilitation of the upper limb. Overall we identified 104 relevant publications. Within these some applied multiple visual feedback types. We found six main visualization groups: Avatar Feedback (N=52), Augmented Reality Feedback (N=16), Abstract Feedback (N=40), Tracking Feedback (N=13), Performance Evaluation Feedback (N=2), and Combined Feedback (N=7). However, there is insufficient evidence for the choice of a specific visual feedback in relation to motor outcome. Thus, further research is necessary.

关键词： Visualization Avatars Systematics Abstracts Augmented reality Performance evaluation

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