Absorbing the dynamics in production and to stabilize the production processes requires high efforts in order control. Today's IT-systems such as Enterprise Resource Planning (ERP) and Manufacturing Execution Syst...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
Absorbing the dynamics in production and to stabilize the production processes requires high efforts in order control. Today's IT-systems such as Enterprise Resource Planning (ERP) and Manufacturing Execution Systems (MES) are specialized in planning technical resources and optimizing deterministic sequences. Inconsistencies in planning have to be compensated by the operational staff at the latest. The vision of High Resolution Information Management (HRIM) is to build upon decentralized and adaptive control mechanisms for the workers in contrast to the traditional centralized control paradigm. In using context information, creating transparency through information and evaluating alternatives in the decision making process, the workers can better be enabled in handling the dynamic inherent in the system. The centralized structure of the companywide planning and control system will therefore not be abolished on the operational area but completed by decentralized self controlling structures.
The virtual reality is a multi-functional, interactive and immersible technology. As an advanced engineering design technology, the virtual reality technology (VRT) has been widely used in large mining machinery desig...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
The virtual reality is a multi-functional, interactive and immersible technology. As an advanced engineering design technology, the virtual reality technology (VRT) has been widely used in large mining machinery design and manufacturing. The system is based on DIVISION Mockup2000i2 software. Virtual prototype of the Tunnel Boring Machine (TBM) is studied in this paper. In addition, the movement simulation of TBM is completed in DIVISION Mockup2000i2. Firstly, CATIA software is adopted to build the parts of TBM. The TBM is assembled in CATIA too. Secondly, the THEOREM software is applied to convert the assembled model of TBM to another format which can be identified in DIVISION MOCKUP2000i2 software. In order to make the TBM image living, life-like and easy to browse, the light of surface, virtual materials and landmark scenes are set up in DIVISION MOCKUP2000i2 software environment. All motion parameters of the parts are defined before the simulation. Then, the virtual movement simulation of TBM components is analyzed with the behaviors property of MOCKUP. The virtual movement of cutting wheel, screw conveyor machinery and the door of mud out are studied. The virtual movement of segments and segment erector machine are completed by setting up virtual parts and virtual event. Five segments are fixed accurately in a cycle. The relations and interference of the parts movement are examined simultaneity. The hotkey is defined before the simulation, which can trigger the continuous implementation of virtual motion. In addition, a virtual voice is used to enhance the performance of movement simulation. The virtual prototype of TBM being set up and simulated will have positive significance for design inspection, structural analysis and product introduction without TBM physical prototype being manufactured.
The demand of the forging industry for high quality parts combined with a high-level delivery performance is constantly growing. For increasing the level of delivery performance without an increase of the production c...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
The demand of the forging industry for high quality parts combined with a high-level delivery performance is constantly growing. For increasing the level of delivery performance without an increase of the production costs, an integrated production management system covering the tasks of supply chain management (SCM) as well as production planning and control (PPC) being enhanced by logistic risk management and tool maintenance (TM) is set up within the research project SFB489 C4 "Planning and control of flexible supply chains for the production of precision forged components". This paper provides an overview of achieved results and presents the contents of current research about the co-ordination of PPC and TM.
Time is an important Quality of Service (QoS) parameter in services. In many situations, the response provided by a service could be completely useless if it is not provided on time. In this paper the infrastructure t...
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ISBN:
(纸本)9783642124327
Time is an important Quality of Service (QoS) parameter in services. In many situations, the response provided by a service could be completely useless if it is not provided on time. In this paper the infrastructure to provide a real-time web service (RTWS) is described. These RTWS are provided by agents with the capability of negotiation and guaranteeing the service execution time. These kind of agents control the service execution time and allow a provider-client negotiation process in order to arrive at an agreement on when the service response is it to be provided. If an agreement is reached, these agents also guarantee that the agreement is going to be fulfilled. Finally, tests to validate RTWSs and the behavior of provider agents are presented.
This work presents the dialogue interface that is being developed for the AMICA project(1), aimed at self-management and follow-up of patients with Chronic Obstructive Pulmonary Disease (COPD). This platform tries to ...
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ISBN:
(纸本)9783642123832
This work presents the dialogue interface that is being developed for the AMICA project(1), aimed at self-management and follow-up of patients with Chronic Obstructive Pulmonary Disease (COPD). This platform tries to overcome possible problems of interaction of patients by extending the traditional mouse and keyboard with new information-communication technologies such as natural dialogue. Since most of these patients are elderly, these technologies can help suit their users' needs and overcome their impairment by providing more natural ways of interacting with technology. The first analyses suggest that dialogue models must be flexible enough to be adapted to requirements of natural language.
Precise machining spiral bevel gear (SBGs) on Numerical Control (NC) machine tools has attracted much research attention. This paper presents a new precise SBGs CAD/CAM model with Loop subdivision algorithm. The invol...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
Precise machining spiral bevel gear (SBGs) on Numerical Control (NC) machine tools has attracted much research attention. This paper presents a new precise SBGs CAD/CAM model with Loop subdivision algorithm. The involute surfaces for spiral bevel gears and pinions are first modelled with parametric surfaces. From them and a set of parameters, an initial mesh model is created for gear surfaces. This mesh model is then used as a base for a subdivision surface. The precision of subdivision surfaces can be exactly controlled by a subdivision process which can generate enough machining points on the designed tooth surface model. As a result, all meshing points of the tooth surface for a pair of gear and pinion can be applied on NC machines for higher-precision surface manufacturing. This novel SBGs CAD/CAM modelling method has been evaluated with precision. The precise model could be extended to hypoid gear and other complex surface design.
Currently, for meeting the Just-in-Time (JIT) manufacturing requirement in digital plant production, the material delivery is becoming an important issue to be studied which is characterized by real time, accuracy and...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
Currently, for meeting the Just-in-Time (JIT) manufacturing requirement in digital plant production, the material delivery is becoming an important issue to be studied which is characterized by real time, accuracy and optimization. Therefore, this paper presents a new kind of real-time optimal material delivery method for digital plant production by utilizing radio frequency identification (RFID) technology. In the method, the accurate and visual layout for manufacturing resources included in the digital plant such as manufacturing equipment, RFID devices, forklifts and all kinds of inventories are realized. After real-time locating and tracking the positions of forklifts by utilizing RFID technology and taking the minimal travel distance as the objective, a mathematical model for real-time optimal material delivery in digital plant is established to obtain the optimal travel distances of forklifts. In order to resolve the mathematical model effectively and efficiently, the branch and bound programming model is built. A prototype system of real-time optimal material delivery is developed and the results derived by the implemented numerical case study demonstrate that the proposed method is suitable for forklift route optimization and navigation. Furthermore, with the help of the proposed method, the work-in-progress (WIP) inventories will be reduced and the material delivery will be more timely and accurately which establishes the foundation for implementing JIT manufacturing in digital plant production.
Radio Frequency Identification (RFID) is a technology of the future that uses radio waves in order to identify objects. It can be considered to be part of an emerging universal infrastructure that supports greater vis...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
Radio Frequency Identification (RFID) is a technology of the future that uses radio waves in order to identify objects. It can be considered to be part of an emerging universal infrastructure that supports greater visibility (e.g. object localization) and efficiency (e.g. reduction of manual input) in manufacturing processes. Increased requirements regarding efficiency in the metal cutting manufacturing urge to well matched tools. In combination with tools, RFID can lead to benefits such as optimal tool utilization, through put time reduction and efficient use of resources. This paper presents an approach to identify RFID application potentials for metal cutting tools in manufacturing processes. Hereby, it describes a step by step approach to define application potentials for RFID by taking technical restrictions into account. The paper presents significant results of identified potential to optimize manufacturing processes by the use of unified, comprehensive information.
An important service for systems providing access to information is the organization of returned search results. Vector model search results may be represented by a sphere in an n-dimensional space. A query represents...
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We present in this work a robust color transformation which has been applied succesfully to natural scenes allowing the fast and precise segmentation of regions corresponding to color landmarks under uncontrolled ligh...
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ISBN:
(纸本)9783642124327
We present in this work a robust color transformation which has been applied succesfully to natural scenes allowing the fast and precise segmentation of regions corresponding to color landmarks under uncontrolled lightning. The process is grounded in the the Dichromatic Reflexion Model (DRM) and the properties of the RGB space.
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