9,283 research outputs found
An intelligent approach to design three-dimensional aircraft sheet metal part model for manufacture
Aircraft sheet metal part manufacturing is a knowledge-intensive process, and the manufacturability and manufacturing information are required to be considered in three-dimensional (3D) model by knowledge reuse. This paper presents a 3D model structure of the aircraft sheet metal part and an intelligent approach to design the model for manufacture combining intelligent manufacturability analysis with manufacturing information definition. Processability of part, formability of material and cost of fabrication are proposed to analyse the manufacturability of the part. Knowledge base for manufacturability analysis is established, and knowledge is reused to evaluate the part’s manufacturability intelligently to meet the constraints of manufacturing conditions. Non-geometric information is defined in the 3D model to meet the needs of digital manufacturing and inspection using model-based technology. An example is given to describe the process of design for manufacture, which shows that the approach can realize the concurrent design and digital manufacturing of aircraft sheet metal
Neural modeling and space mapping: two approaches to circuit design
The drive in the microwave industry for manufacturability-driven design and time-to-market demands powerful and efficient computer-aided design tools. The need for statistical analysis and yield optimization coupled with the desire to use accurate physics-based and EM-based models leads to tasks that are computationally intensive using conventional approaches. We present two recent advances in the microwave CAD area, Artificial Neural Network (ANN) based modeling and Space Mapping (SM) based modeling for fast and accurate design of microwave components and circuits.Consejo Nacional de Ciencia y TecnologĂaCarleton Universit
ATLAS IBL Pixel Upgrade
The upgrade for ATLAS detector will undergo different phase towards
super-LHC. The first upgrade for the Pixel detector will consist of the
construction of a new pixel layer which will be installed during the first
shutdown of the LHC machine (LHC phase-I upgrade). The new detector, called
Insertable B-Layer (IBL), will be inserted between the existing pixel detector
and a new (smaller radius) beam-pipe at a radius of 3.3 cm. The IBL will
require the development of several new technologies to cope with increase of
radiation or pixel occupancy and also to improve the physics performance which
will be achieved by reducing the pixel size and of the material budget. Three
different promising sensor technologies (planar-Si, 3D-Si and diamond) are
currently under investigation for the pixel detector. An overview of the
project with particular emphasis on pixel module is presented in this paper.Comment: 3 pages, 3 figures, presented at the 12th Topical Seminar on
Innovative Particle and Radiation Detectors (IPRD10) 7 - 10 June 2010, Siena
(IT). Accepted by Nuclear Physics B (Proceedings Supplements) (2011
ATLAS IBL Pixel Upgrade
The upgrade for ATLAS detector will undergo different phase towards
super-LHC. The first upgrade for the Pixel detector will consist of the
construction of a new pixel layer which will be installed during the first
shutdown of the LHC machine (LHC phase-I upgrade). The new detector, called
Insertable B-Layer (IBL), will be inserted between the existing pixel detector
and a new (smaller radius) beam-pipe at a radius of 3.3 cm. The IBL will
require the development of several new technologies to cope with increase of
radiation or pixel occupancy and also to improve the physics performance which
will be achieved by reducing the pixel size and of the material budget. Three
different promising sensor technologies (planar-Si, 3D-Si and diamond) are
currently under investigation for the pixel detector. An overview of the
project with particular emphasis on pixel module is presented in this paper.Comment: 3 pages, 3 figures, presented at the 12th Topical Seminar on
Innovative Particle and Radiation Detectors (IPRD10) 7 - 10 June 2010, Siena
(IT). Accepted by Nuclear Physics B (Proceedings Supplements) (2011
Ultra-Stretchable Interconnects for High-Density Stretchable Electronics
The exciting field of stretchable electronics (SE) promises numerous novel
applications, particularly in-body and medical diagnostics devices. However,
future advanced SE miniature devices will require high-density, extremely
stretchable interconnects with micron-scale footprints, which calls for proven
standardized (complementary metal-oxide semiconductor (CMOS)-type) process
recipes using bulk integrated circuit (IC) microfabrication tools and
fine-pitch photolithography patterning. Here, we address this combined
challenge of microfabrication with extreme stretchability for high-density SE
devices by introducing CMOS-enabled, free-standing, miniaturized interconnect
structures that fully exploit their 3D kinematic freedom through an interplay
of buckling, torsion, and bending to maximize stretchability. Integration with
standard CMOS-type batch processing is assured by utilizing the Flex-to-Rigid
(F2R) post-processing technology to make the back-end-of-line interconnect
structures free-standing, thus enabling the routine microfabrication of
highly-stretchable interconnects. The performance and reproducibility of these
free-standing structures is promising: an elastic stretch beyond 2000% and
ultimate (plastic) stretch beyond 3000%, with 10
million cycles at 1000% stretch with <1% resistance change. This generic
technology provides a new route to exciting highly-stretchable miniature
devices.Comment: 13 pages, 5 figure, journal publicatio
Course development in IC manufacturing
A traditional curriculum in electrical engineering separates semiconductor processing courses from courses in circuit design. As a result, manufacturing topics involving yield management and the study of random process variations impacting circuit behaviour are usually vaguely treated. The subject matter of this paper is to report a course developed at Texas A&M University, USA, to compensate for the aforementioned shortcoming. This course attempts to link technological process and circuit design domains by emphasizing aspects such as process disturbance modeling, yield modeling, and defect-induced fault modeling. In a rapidly changing environment where high-end technologies are evolving towards submicron features and towards high transistor integration, these aspects are key factors to design for manufacturability. The paper presents the course's syllabus, a description of its main topics, and results on selected project assignments carried out during a normal academic semeste
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