With the advances in material engineering and the Rapid Prototyping (RP) technology, product design and realization are experiencing dramatic paradigm shifts. The new trend is that designers work with material scienti...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
With the advances in material engineering and the Rapid Prototyping (RP) technology, product design and realization are experiencing dramatic paradigm shifts. The new trend is that designers work with material scientists more cooperatively to tailor material compositions/structures to achieve desirable properties and to exhibit better performance than those products using other available materials. In this paper, research on heterogeneous (HE) material-based product modeling is reported. To better represent various HE material-based product models, a set of NURBS (Non Uniform Rational B-Spline) and HE material-based design features have been developed. The features are not only suitable for regular shapes, but also extensible for non-regular and complex shapes. Algorithms for linear and non-linear transition between HE materials have been embedded in the features to enable users to address the functional needs. Another characteristic of the features is that geometrical variables have been used to model HE materials to improve their computation and processing efficiency in RP. In order to demonstrate the effectiveness of the research for complex products, a case study to develop a HE material-based bone implant is reported to explain the modeling process.
Product quality planning is a fundamental part of quality assurance in manufacturing. It is composed of the distribution of quality aims over each phase in product development and the deployment of quality operations ...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
Product quality planning is a fundamental part of quality assurance in manufacturing. It is composed of the distribution of quality aims over each phase in product development and the deployment of quality operations and resources to accomplish these aims. This paper proposes a quality planning methodology based on risk assessment and the planning tasks of product development are translated into evaluation of risk priorities. Firstly, a comprehensive model for quality planning is developed to address the deficiencies of traditional quality function deployment (QFD) based quality planning. Secondly, a novel failure knowledge base (FKB) based method is discussed. Then a mathematical method and algorithm of risk assessment is presented for target decomposition, measure selection, and sequence optimization. Finally, the proposed methodology has been implemented in a web based prototype software system, QQ-Planning, to solve the problem of quality planning regarding the distribution of quality targets and the deployment of quality resources, in such a way that the product requirements are satisfied and the enterprise resources are highly utilized.
The numbers of hard disk drive heads manufactured in Thailand have increased rapidly in the past few years, and one of the most important components of the hard disk drive head is the hard disk drive arm. This compone...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
The numbers of hard disk drive heads manufactured in Thailand have increased rapidly in the past few years, and one of the most important components of the hard disk drive head is the hard disk drive arm. This component has been produced in large amounts and has been a major income source for a case study company. The manufacturing process of the hard disk drive arm, especially the machining process, is highly complicated and also a main factor of defining the usability of the final product. However, during dimension inspections, many defected parts were detected, resulting in an overall decrease in productivity, sales and profit. Normally, parts are randomly chosen from each CNC machine to be inspected. If there is a defective product, that machine would be shut down and the tool settings will be reset. If the machine that has been producing defective products is inspected late into the inspection shifts, it would result in a considerable amount of defective parts produced before any corrective actions can be made. Therefore, this study presents an application of the integration between Multiple Attribute Decision Making (MADM) and Data Mining (DM) to define the inspection order for tooling adjustment of which the machines with higher risk of producing defective parts can be inspected and corrected before those with lower risk. The methodology is as follows. First, raw measurement data from each machine was collected and noise elimination was performed using the anomaly clustering method. Secondly, K-means clustering, after a machine performance hypothesis test to confirm that the performance of each machine is not equal, was opted for dividing the raw data into three clusters, consisting of good, normal, and bad machines. Finally, a daily CNC machine priority assessment model (CNC-MPAM) is developed based on the Simple Additive Weight (SAW) technique, resulting in a machine performance score for optimal ordering of machine tooling adjustment. Experimental results
The automation of intrabay system in 300mm semiconductor wafer fabrication system is complex due to complicated product mixes, mass and dynamic transportation demands, transportation deadlock, and vehicle blockage. To...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
The automation of intrabay system in 300mm semiconductor wafer fabrication system is complex due to complicated product mixes, mass and dynamic transportation demands, transportation deadlock, and vehicle blockage. To obtain better overhead hoist transport (OHT) dispatching solution in intrabay system, a fuzzy logic based greedy dynamic priority dispatching policy is proposed. With experimental data from a 300mm semiconductor wafer fabrication system, it is demonstrated that the proposed approach has the better comprehensive performance than FEFS dispatching rule in aspect of cycle time, delivery time, transport time, movement, throughput, due date satisfaction, and WIP in intrabay system.
In the current business environment, enterprises should be able to develop new products in a reasonably short period of time to satisfy customers' demand as well as short product lifecycle. Furthermore, new produc...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
In the current business environment, enterprises should be able to develop new products in a reasonably short period of time to satisfy customers' demand as well as short product lifecycle. Furthermore, new product development is realized not only on an intra-enterprise level but also on an inter-enterprise level. Individual enterprises, especially small and medium enterprises, often do not have all the necessary skills and resources to develop new products. Therefore, finding the right and trustworthy partners and forming an organization for product development are important issues in developing new products. To find right partners and form an effective organization, it is necessary to measure trust values of other enterprises involved in product developments. The objective of this paper is to formulate a reference organizational architecture for product developments referred to as FrPDO (Fractal-based Product Development Organization model). A goal-oriented trust model and trust evaluation mechanisms for organizational formation are also developed. The fractal organization formation process is demonstrated for a new service robot development.
This paper presents an evaluation and discussion of the digital factory tools, based on various software applications. The aim is to map the software tools within the digital factory and evaluate them with regard to t...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
This paper presents an evaluation and discussion of the digital factory tools, based on various software applications. The aim is to map the software tools within the digital factory and evaluate them with regard to the digital factory theory. This work aims to compare research theory with the software tools that are available on the market and how they differ. It is important to know how the commercial state-of-the-art software tools differ from the research theory of the digital factory, for further research development. A test case has been carried out to realize a mini digital factory based on commercial software.
The conceptual development of Industrial Product-Service Systems (IPS(2)) requires the integration of different domains, i.e. mechatronic and service engineering. Considering this integration, an IPS(2) concept model ...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
The conceptual development of Industrial Product-Service Systems (IPS(2)) requires the integration of different domains, i.e. mechatronic and service engineering. Considering this integration, an IPS(2) concept model and an IPS(2) concept development methodology have been proposed. Applying model and methodology to an evaluation example reveals that even simple IPS(2) can reach a high level of complexity in the conceptual design phase. To handle this complexity and to optimise the development of IPS(2) concepts, developers need comprehensive knowledge of participated domains and effective development tools. In this paper an approach for a knowledge based assistance is presented, which supports developers in different tasks of IPS(2) concept development. Focus of the paper is the knowledge based support of the IPS(2) concept development methodology by deducing concepts for IPS(2) from given requirements. Starting with the basic understanding of IPS(2) concept modelling and conceptual development, the paper describes the requirements for a knowledge based assistance system. Based on these requirements, an approach has been developed and implemented in a software prototype. This paper concludes with the application of the approach on an evaluation example.
In this paper we propose a generalized model of identification which displays flexible transformation within the framework of generally known paradigms by changing tunings. The application of this model enables to syn...
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ISBN:
(纸本)9783642124327
In this paper we propose a generalized model of identification which displays flexible transformation within the framework of generally known paradigms by changing tunings. The application of this model enables to synthesize various classifiers using a priori information about definite applied tasks of identification. So, we describe the approach to the solution of the problem of generation of representative training sequences and correct comparative evaluation of classifiers.
This paper focuses on the development of a data model to describe the functional capability of resources within the scope of fast and automatic generation of replies to customer requests. Starting with a description o...
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ISBN:
(数字)9783642104305
ISBN:
(纸本)9783642104299
This paper focuses on the development of a data model to describe the functional capability of resources within the scope of fast and automatic generation of replies to customer requests. Starting with a description of the purpose and the solution approach this paper presents the stepwise procedure to develop such a data model. The modeling starts with the creation of a basic model which is used as a base for the further development of an object-oriented data model using UML (Unified Modeling Language). This step includes creation of use cases as well as activity und class diagrams. The modeling process is finalized by the transformation of the data model into a database that is capable of storing information about resources and allocates them to other work packages of the solution approach.
This paper presents a multiagent system that can process stereoscopic images and detect people with a stereo camera. In the first of two phases, the system creates a model of the environment using a disparity map. It ...
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ISBN:
(纸本)9783642124327
This paper presents a multiagent system that can process stereoscopic images and detect people with a stereo camera. In the first of two phases, the system creates a model of the environment using a disparity map. It can be constructed in real time, even if there are moving objects present in the area (such as people passing by). In the second phase, the system is able to detect people by combining a series of novel techniques. A multi-agent system (MAS) is used to deal with the problem. The system is based on cooperative and distributed mechanisms and was tested under different conditions and environments.
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