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Rapid Prototyping Environment for Power Line Modem Design, Implementation, Verification, and Optimization
M. Shabro,M. A. Toutounchain,M. Kh. Hazrati
International Journal of Engineering and Advanced Technology , 2012,
Abstract: This paper describes design, implementation, verification and optimization of a power line modem with model-based evaluation approach. Nowadays, model-based design for embedded systems is used extensively to accelerate the development time and to improve the quality of the resulting applications by systematic design and test. The majority of DSP designers today use the MathWorks software includes MATLAB and/or Simulink as a foundation tool not only for simulation but also for real-time target specific C-code generation. In our modem project, all parts including transmitter, receiver, I/O drivers and startup protocols have been realized entirely in Simulink environment for simulation and hardware implementation. A floating-point DSP has been carried out to minimize the time required to convert simulation software into real-time code. In order to verify the algorithms, real-time data exchange has been developed to test our DSP designs in-situ with real data. Finally, for code optimization, profiling method has been employed to identify segments of generated code that may benefit from additional modification.
Paper Prototyping as a Rapid Participatory Design Technique  [cached]
Aznoora Osman,Hanif Baharin,Mohammad Hafiz Ismail,Kamaruzaman Jusoff
Computer and Information Science , 2009, DOI: 10.5539/cis.v2n3p53
Abstract: This paper describes participatory activities with university lecturers to design an online community. The objective of this study is to engage the users of an online community to collaboratively design their online community. We speculated that by involving them in the design team, we can identify their specific requirements, and they will accept and use the system. However, lecturers have heavy workload and tight schedule. For that reason, we thought that paper prototyping is the most suitable tool to be used because it is fast and easy to create. Therefore, paper prototyping technique has been adapted in a two-day participatory design session. We found that paper prototyping is indeed the most suitable technique to elicit requirements from the end users under a time constraint. Moreover, participants came out with unexpected requirements and novel interface.
A Multi-FPGA Rapid Prototyping System with the Reusable AES Core  [PDF]
Fang-Hsi Kuo,Shou-Te Yen,Chia-Cheng Liu
Information Technology Journal , 2005,
Abstract: In this study, we develop a reconfigurable rapid prototyping system with PCI as interface. Reconfigurable processing unit uses I/O coupling way with general propose processor to work in coordination and to accelerate the execution of the specific task. Use four FPGA chip in order to offer the hardware design environment under multi-FPGA structures systematically at the same time. This system except that the intact hardware is designed and implemented, but also include the setting-up of the driver with offer the application program interface which access the hardware. In order to prove that systematic function of rapid prototyping board is correct, design one IP Core to apply to this system. We implement an Advanced Encryption Standard (AES) hardware circuit for this goal. The focal point designed lies in making optimization to resources of FPGA and AES suitability in reconfigurable computing with multi-FPGA system.
Rapid Industrial Prototyping and SoC Design of 3G/4G Wireless Systems Using an HLS Methodology  [cached]
Guo Yuanbin,McCain Dennis,Cavallaro JosephR,Takach Andres
EURASIP Journal on Embedded Systems , 2006,
Abstract: Many very-high-complexity signal processing algorithms are required in future wireless systems, giving tremendous challenges to real-time implementations. In this paper, we present our industrial rapid prototyping experiences on 3G/4G wireless systems using advanced signal processing algorithms in MIMO-CDMA and MIMO-OFDM systems. Core system design issues are studied and advanced receiver algorithms suitable for implementation are proposed for synchronization, MIMO equalization, and detection. We then present VLSI-oriented complexity reduction schemes and demonstrate how to interact these high-complexity algorithms with an HLS-based methodology for extensive design space exploration. This is achieved by abstracting the main effort from hardware iterations to the algorithmic C/C++ fixed-point design. We also analyze the advantages and limitations of the methodology. Our industrial design experience demonstrates that it is possible to enable an extensive architectural analysis in a short-time frame using HLS methodology, which significantly shortens the time to market for wireless systems.
Rapid Industrial Prototyping and SoC Design of 3G/4G Wireless Systems Using an HLS Methodology  [cached]
Yuanbin Guo,Dennis McCain,Joseph R. Cavallaro,Andres Takach
EURASIP Journal on Embedded Systems , 2006, DOI: 10.1155/es/2006/14952
Abstract: Many very-high-complexity signal processing algorithms are required in future wireless systems, giving tremendous challenges to real-time implementations. In this paper, we present our industrial rapid prototyping experiences on 3G/4G wireless systems using advanced signal processing algorithms in MIMO-CDMA and MIMO-OFDM systems. Core system design issues are studied and advanced receiver algorithms suitable for implementation are proposed for synchronization, MIMO equalization, and detection. We then present VLSI-oriented complexity reduction schemes and demonstrate how to interact these high-complexity algorithms with an HLS-based methodology for extensive design space exploration. This is achieved by abstracting the main effort from hardware iterations to the algorithmic C/C++ fixed-point design. We also analyze the advantages and limitations of the methodology. Our industrial design experience demonstrates that it is possible to enable an extensive architectural analysis in a short-time frame using HLS methodology, which significantly shortens the time to market for wireless systems.
Application of the rapid prototyping technique to design a customized temporomandibular joint used to treat temporomandibular ankylosis  [cached]
Chaware Suresh,Bagaria Vaibhav,Kuthe Abhay
Indian Journal of Plastic Surgery , 2009,
Abstract: Anthropometric variations in humans make it difficult to replace a temporomandibular joint (TMJ), successfully using a standard "one-size-fits-all" prosthesis. The case report presents a unique concept of total TMJ replacement with customized and modified TMJ prosthesis, which is cost-effective and provides the best fit for the patient. The process involved in designing and modifications over the existing prosthesis are also described. A 12-year- old female who presented for treatment of left unilateral TMJ ankylosis underwent the surgery for total TMJ replacement. A three-dimensional computed tomography (CT) scan suggested features of bony ankylosis of left TMJ. CT images were converted to a sterolithographic model using CAD software and a rapid prototyping machine. A process of rapid manufacturing was then used to manufacture the customized prosthesis. Postoperative recovery was uneventful, with an improvement in mouth opening of 3.5 cm and painless jaw movements. Three years postsurgery, the patient is pain-free, has a mouth opening of about 4.0 cm and enjoys a normal diet. The postoperative radiographs concur with the excellent clinical results. The use of CAD/CAM technique to design the custom-made prosthesis, using orthopaedically proven structural materials, significantly improves the predictability and success rates of TMJ replacement surgery.
Optimization method of preheating process in rapid prototyping based on image analysis
基于图像分析的快速成型预热优化方法*

ZENG Feng,YAO Shan,YANG Tong,JIAO Zhong-fei,ZHAO Shu-ming,
曾锋
,姚山,杨通,焦中飞,赵枢明

计算机应用研究 , 2011,
Abstract: To against the demerits of temperature measurement and control for powder bed in preheating process, this paper presented an optimization method of preheating process in rapid prototyping (RP) based on image analysis. By utilizing Windows application programming interface (API) functions, it analysed the image of powder bed on-line by adopting VB and secondary development technology. Grayscale histogram and preheating effect index of image were calculated out to compare with the standard index. The preeating process was real-time controlled by comparison result. It presented two realization algorithms based on mobile heat source and fixed heat source. The hardware and software implementation of this method were modular designed, and could be used in existing RP machine and control program. The result of case study shows that the accuracy and mechanical strength of products are high by using this method in RP preheating process, which can improve the processing efficiency, as well as decreased the failure times.
Friction Induced Wear of Rapid Prototyping Generated Materials: A Review  [PDF]
A. Tsouknidas
Advances in Tribology , 2011, DOI: 10.1155/2011/746270
Abstract: Additive manufacturing has been introduced in the early 80s and has gained importance as a manufacturing process ever since. Even though the inception of the implicated processes predominantly focused on prototyping purposes, during the last years rapid prototyping (RP) has emerged as a key enabling technology for the fabrication of highly customized, functionally gradient materials. This paper reviews friction-related wear phenomena and the corresponding deterioration mechanisms of RP-generated components as well as the potential of improving the implicated materials' wear resistance without significantly altering the process itself. The paper briefly introduces the concept of RP technologies and the implicated materials, as a premises to the process-dependent wear progression of the generated components for various degeneration scenarios (dry sliding, fretting, etc.). 1. Introduction Rapid prototyping (RP) poses a promising alternative to conventional manufacturing techniques during concept evaluation, design optimization, rapid tooling, and lately for direct production of customer driven products. The comparative advantages of additive manufacturing are both cost and time related while RP facilitates the direct incorporation of functional characteristics into the final product. The basic concept of RP techniques relays on the conversion of 3D geometries, generated or processed by computer-aided design (CAD), into an STL file format. This is followed by the segmentation of the object in a series of overlaying layers, an essential step in the bottom-up approach of any additive manufacturing process. RP processes initiate with the construction of the objects’ base layer and progress upwards, with each layer being deposited/formed on top of the proceeding one, finally resulting in the desired 3D geometry. This approach circumvents limitations associated with conventional manufacturing methods, provides products with competitive strength characteristics, allows the fabrication of geometries of unequal complexity, while simplifying the incorporation of application specific features into the produced object [1]. Several industrial sectors (automotive, aerospace, and medical) have embraced, supported, and in some cases even dictated recent advances in RP, leading to customized, high added value products, whereas the implicated technologies can be easily extended to numerous other applications. Rapid prototyping technologies can be categorized into three main categories: solid based like fused deposition modeling (FDM), powder based as selective laser
ADVANCEMENT OF RAPID PROTOTYPING IN AEROSPACE INDUSTRY -A REVIEW
Vineet Kumar Vashishtha,,Rahul Makade,,Neeraj Mehla
International Journal of Engineering Science and Technology , 2011,
Abstract: Rapid prototyping technology have emerged a new innovation to reduced the time cost of moulds fabrication by creating 3D product directly from computer aided design thus the designer is able to perform design validation and accuracy analysis easily in a virtual environment as if using a physical model. The primary aim of this paper is to give the reader an overview of the current state of the art in rapid prototyping technology .The paper also deal with feature’s of rapid prototyping in Aerospace industry and some of the existing problem’s of rapid rototyping.
Optimizing scale factors of the PolyJet rapid prototyping procedure by genetic programming  [PDF]
T. Brajlih,I. Drstvensek,M. Kovacic,J. Balic
Journal of Achievements in Materials and Manufacturing Engineering , 2006,
Abstract: Purpose: The main purpose of our article is to represent results of our research that investigated the implementation of genetic programming methods into optimization process of the scale factor values used in PolyJet rapid prototyping procedures.Design/methodology/approach: The first step in our research was to test the influence of the recommended scale factor values on the dimensional accuracy of the finished parts. Then, the genetic programming was used in optimization of scale factor values regarding to the part’s properties. Finally, the optimized values were tested on another test series of parts.Findings: The optimized scale factor values yield better results in terms of accuracy than values recommended by the manufacturer.Research limitations/implications: Due to the large increase in part’s build time/cost the data range of the Z-axis dimensions of our test series was somewhat narrow, leaving the detailed study of Z-axis scale factor values for further research.Practical implications: The optimized scale factor values can be used in the RP machine software package in order to achieve higher accuracy of manufactured prototypes.Originality/value: This paper can be used as a guideline in implementation of genetic programming in optimization process of various manufacturing parameters of RP technologies. Additionally, any user of the PolyJet RP machine can use optimized scale factor values described in the paper.
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