Literatura académica sobre el tema "CATIA (Computer file)"
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Artículos de revistas sobre el tema "CATIA (Computer file)"
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Sun, C., D. Guo, H. Gao, L. Zou y H. Wang. "A method of version merging for computer-aided design files based on feature extraction". Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, n.º 2 (20 de junio de 2010): 463–71. http://dx.doi.org/10.1243/09544062jmes2159.
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In order to manage the version files and maintain the latest version of the computer-aided design (CAD) files in asynchronous collaborative systems, one method of version merging for CAD files is proposed to resolve the problem based on feature extraction. First of all, the feature information is extracted based on the feature attribute of CAD files and stored in a XML feature file. Then, analyse the feature file, and the feature difference set is obtained by the given algorithm. Finally, the merging result of the difference set and the master files with application programming interface (API) interface functions is achieved, and then the version merging of CAD files is also realized. The application in Catia validated that the proposed method is feasible and valuable in engineering.
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Zahariea, Dănuţ. "Computer Aided Design of Centrifugal Fan Impeller Using CATIA Software". Applied Mechanics and Materials 809-810 (noviembre de 2015): 853–58. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.853.
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In this paper, the 3D model of the centrifugal fan impeller will be obtained using CAD software (CATIA). The blade will be obtained with 4 design methods: constant blade width and variable blade angle; hyperbolic blade width and variable blade angle; hyperbolic blade width and constant blade angle; linear blade width and variable blade angle. A comparative analysis of the weight of the blade, as well as of the weight of the rotor composed by cascade of blades, front and rear shrouds will be presented. Two materials have been used for all the elements of the centrifugal fan impeller: steel and aluminium. For computational purposes the MATLAB programming language will be used. The centrifugal fan blade will be designed as untwisted geometry with =2 reference curves (one on the rear shroud and the other one on the front shroud) with different numbers of reference points ={5, 10, 20, 30, 40, 50}. After running the MATLAB script file, the coordinates of reference points of the blade will be obtained for all 4 blade design methods. The transfer of the reference points coordinates from MATLAB workspace to CATIA has been performed using the automatic surface generation method, via an EXCEL macro file. This is the recommended method especially for a big number of reference points.
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Rojas-Sola, José Ignacio, Gloria del Río-Cidoncha, Rafael Ortíz-Marín y José Antonio Moya-Ocaña. "Design and Development of a Macro to Compare Sections of Planes to Parts Using Programming with Visual Basic for Applications in CATIA". Symmetry 15, n.º 1 (16 de enero de 2023): 242. http://dx.doi.org/10.3390/sym15010242.
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This article presents an application for educational purposes in the field of engineering graphics, which corrects the dihedral projections of the sections of a plane for a part by comparing the solution provided by the student with that obtained through 3D CAD modelling software. Said application is generated as a macro in CATIA (Computer-Aided Three-Dimensional Interactive Application), which is included as a tool in the ‘Part Design’ module. The code of this macro is written in the CATVBA language, utilizes the CATIA internal editor, and takes advantage of the capabilities offered by Visual Basic for Applications (VBA) in the design of Graphical User Interfaces (GUI). The operation of the macro consists of obtaining the section in the 3D CAD model, projecting it onto three dihedral projections of the part (elevation, plan, and profile), and calculating the visible and hidden lines by means of a numerical process based on dividing the lines into discrete sections. Likewise, to obtain numerical results, the section obtained in CATIA (reference section) is compared with the section provided by the student (section that needed to be corrected) by means of a spreadsheet (Microsoft Excel). The data of the coordinates of the points of the reference section are exported to said spreadsheet as is the data of the coordinates of the section that needed to be corrected, which is contained in a file with a dxf format (Drawing eXchange Format). From these data, by programming the appropriate formulae in the cells of the spreadsheet, the numerical values of the errors are obtained, thereby locating said errors in the dihedral projections of the section which needed to be corrected. Likewise, the application can be programmed to compare the central symmetry of both of the sections.
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Sener, Arif Senol. "Fatigue life evaluation of an electrically driven shuttle frame using finite element analysis". Materials Testing 63, n.º 4 (1 de abril de 2021): 329–35. http://dx.doi.org/10.1515/mt-2020-0048.
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Abstract This article provides the fatigue life estimation of the frame of a new electrically powered shuttle used in airports and resorts. The frame and components of the electrically powered shuttle were designed by expert employers of the OSCAR Co. using a CATIA computer program. Accelerometers were mounted under and above the prototype electric vehicle frame and external load path interaction data were collected by road tests. By means of five varied degrees of road roughness and three different conditions for vehicle loading, the raw road data were recorded via accelerometers on the vehicle frame. The recorded raw data was made available by processing with the FDesign program. After the external load was determined, a 3D drawing of the frame of the vehicle was transferred to the ANSYS program as a step file. In the chassis model transferred to the ANSYS program; material assignment, meshing of the frame structure, defining the boundary conditions of the structure and static analysis were determined according to the most critical road load, following which fatigue analyses were performed for five different roads. The fatigue life and damage amount of each road on the vehicle frame were calculated separately by considering Miner’s rule according to the S-N high cycle method. Experiments showed that no fatigue damage occurred within the predicted 200,000 km.
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Li, Jing, Shan Shan Bai, Yi Long Wang, Ping Xi y Bing Yi Li. "Design of Virtual Machine Assembly Simulation System in Single-Channel Immersion". Key Engineering Materials 620 (agosto de 2014): 556–62. http://dx.doi.org/10.4028/www.scientific.net/kem.620.556.
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The virtual reality technology has been widely applied in virtual manufacturing; virtual environment which integrated with visual, auditory and tactile can be established. In this paper, a single - channel immersion machine assembly simulation system was built by EON Studio of virtual reality software and virtual peripherals. For building immersion virtual environment, three dimensional entity model of machine was established by the CATIA software, rendering and coloring it through the 3ds Max, inputting interface of EON convert file. Researching on interactive virtual assembly technology of machine was done, two interactive methods were developed through the keyboard ,mouse and other input devices or data glove ,(Flock and Bird) and other virtual peripherals respectively: one was to realize the interaction based on keyboard by the triggering sensor node, event driven and routing mechanism ; another was established the virtual hand, achieving the spatial position of manpower through driving virtual hand by data glove and (Flock and Bird) , and converted it into the position of virtual hand in virtual space, to complete the grasping, moving, releasing the object operation in immersion virtual environment, so that completing the virtual machine assembly, assembly trajectory visualization was realized, the basis was provided for the path of assembly analysis. The human-computer interface of assembly simulation system of machine develop, each module integration was realized by the transmission of information between EON Studio and machine, and reasonable guidelines for machine assembly training was provided.
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Fountas, Nikolaos A., Constantinos I. Stergiou, Nikolaos M. Vaxevanidis y Redha Benhadj-Djilali. "A Generic Multi-Axis Post-Processor Engine for Optimal CNC Data Creation and Intelligent Surface Machining". Solid State Phenomena 261 (agosto de 2017): 463–69. http://dx.doi.org/10.4028/www.scientific.net/ssp.261.463.
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This paper focuses on the development of a multi-axis post-processor engine with a curvature-based feed adaptation module, capable of extracting generic CNC data for high precision machining. The motivation of this work stems from the drawback of standard and commercial post-processors to modify their internal source codes so as to be implemented to newly-developed functions which integrate modern CNC units. The multi-axis post-processor proposed in this work operates as a stand-alone function of an artificial intelligent module that optimizes machining parameters for standard swept cut multi-axis surface tool-paths. The post-processor developed receives APT source files previously been optimized by means of a genetic algorithm that handles cutting tool selection; radial cut engagement; maximum discretization step; lead and tilt angles. The algorithm optimizes the aforementioned machining parameters towards the minimization of the number of cutter locations found in a specific APT source file as well as the surface machining error as a combined effect of chordal deviation and scallop height. The final APT output is then properly handled by the post-processor engine so as to extract the final ISO code for a double-pivoted head 5-axis CNC machine and compute optimal values for feed rate in each NC block considering the interpolation error and curvature analysis given the surface properties. To simulate and verify our proposals, the MAZAK Vortex 1000 gantry-type 5-axis CNC machine tool equipped with a Fanuc 15i CNC unit has been selected as the manufacturing resource corresponding to the final CNC output that the proposed post-processor computes. A benchmark sculptured part is created and used for the virtual material removal simulation in CATIA® V5 R18. For that part, both the proposed post-processor engine and a commercially available post-processor were employed to extract G-code data whilst it was shown that identical outputs were obtained.
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Leordean, Dan, Cristian Vilău y Mircea Cristian Dudescu. "Generation of Computational 3D Models of Human Bones Based on STL Data and CAD Software Packages". Applied Sciences 11, n.º 17 (28 de agosto de 2021): 7964. http://dx.doi.org/10.3390/app11177964.
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This paper presents three methods of converting complex 3D models of STL type into solid models. For converting the STL models, specific approximation functions from CATIA and Creo Parametric software were used as well as 3D solid modeling methods that used sketches drawn for sections of the specific analyzed model. This conversion is required to get a solid 3D model that can be used for finite element analysis and to be processed using Boolean functions in specific CAD programs. This paper also presents a study of the effectiveness of FEA in respect to the time required for the analysis of each converted model. The analyzed STL files contain data obtained by computer tomography and are the 3D models of the human orthopedic system: the left zygomatic bone and upper part of the right femur. The presented conversion methods can be used by design engineers both in medical applications (where the complexity of forms is well known) for the design of implants and for industrial applications for reverse engineering.
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ZHANG, HENG, DA-HAN WANG, CHENG-LIN LIU y HORST BUNKE. "KEYWORD SPOTTING FROM ONLINE CHINESE HANDWRITTEN DOCUMENTS USING ONE-VERSUS-ALL CHARACTER CLASSIFICATION MODEL". International Journal of Pattern Recognition and Artificial Intelligence 27, n.º 03 (mayo de 2013): 1353001. http://dx.doi.org/10.1142/s0218001413530017.
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In this paper, we propose a method for text-query-based keyword spotting from online Chinese handwritten documents using character classification model. The similarity between the query word and handwriting is obtained by combining the character classification scores. The classifier is trained by one-versus-all strategy so that it gives high similarity to the target class and low scores to the others. Using character classification-based word similarity also helps overcome the out-of-vocabulary (OOV) problem. We use a character-synchronous dynamic search algorithm to efficiently spot the query word in large database. The retrieval performance is further improved by using competing character confusion and writer-adaptive thresholds. Our experimental results on a large handwriting database CASIA-OLHWDB justify the superiority of one-versus-all trained classifiers and the benefits of confidence transformation, character confusion and adaptive thresholds. Particularly, a one-versus-all trained prototype classifier performs as well as a linear support vector machine (SVM) classifier, but consumes much less storage of index file. The experimental comparison with keyword spotting based on handwritten text recognition also demonstrates the effectiveness of the proposed method.
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Li, Jie, Hang Li, Muquan Wu, Xiang Zhu, Peiguang Yan, Xiaodong Lin y Xiang Gao. "Study on neutronics modeling with 22.5° model using ANSYS for CFETR". AIP Advances 13, n.º 6 (1 de junio de 2023). http://dx.doi.org/10.1063/5.0147514.
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The detailed China Fusion Engineering Test Reactor (CFETR) 22.5° computer aided design (CAD) model is very difficult to convert into Monte Carlo N Particle Transport Code (MCNP). Manually writing MCNP input data is complicated, which is not only time-consuming but also cannot guarantee accuracy. Therefore, in order to improve the efficiency and accuracy of model transformation, modeling with CAD using CATIA is introduced, and MCNP files are converted by ANSYS. This is because ANSYS has a function that converts CAD “stp” format to MCNP input in the geometry section. Meanwhile, ANSYS can also reverse the converted MCNP input file to inspect which module has the problem. Compared with the software platform that can automatically cut, although the CATIA-to-ANSYS method is inferior in terms of automatic operation, it has advantages in accuracy and quickly dealing with error modules. Moreover, it can also perform parametric modeling in CATIA, which facilitates the optimization of the blanket structure. In this paper, the detailed CFETR 22.5° model was developed, and then parametric modeling of the blanket based on CATIA was performed. Finally, a detailed neutronics model is obtained by ANSYS transformation and inspection. Some representative models were initially validated by comparing volume changes before and after conversion. Then, the final neutronics model was used to calculate the nuclear analyses, including the neutron wall loading, fast neutron flux, and nuclear heating on the inboard side. The results show that the volume of the transformed model is basically consistent with the original model, and the error of results is small.
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Cortés Osorio, Jimmy alexander, José Andrés Chaves Osorio y Cristian David López Robayo. "Hybrid Algorithm for the detection of Pixel-based digital image forgery using Markov and SIFT descriptors". Revista Facultad de Ingeniería Universidad de Antioquia, 2 de noviembre de 2021. http://dx.doi.org/10.17533/udea.redin.20211165.
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Today, image forgery is common due to the massification of low-cost/high-resolution digital cameras, along with the accessibility of computer programs for image processing. All media is affected by this issue, which makes the public doubt the news. Though image modification is a typical process in entertainment, when images are taken as evidence in a legal process, modification cannot be considered trivial. Digital forensics has the challenge of ensuring the accuracy and integrity of digital images to overcome this issue. This investigation introduces an algorithm to detect the main types of pixel-based alterations such as copy-move forgery, resampling, and splicing in digital images. For the evaluation of the algorithm, CVLAB, CASIA V1, Columbia, and Columbia Uncompressed datasets were used. Of 7100 images evaluated, 3666 were unaltered, 791 had resampling, 2213 had splicing, and 430 had copy-move forgeries. The algorithm detected all proposed forgery pixel methods with an accuracy of 91%. The main novelties of the proposal are the reduced number of features needed for identification and its robustness for the file format and image size.
Tesis sobre el tema "CATIA (Computer file)"
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Badreddine, Jawad. "Modélisation du grenaillage ultrason pour des pièces à géométrie complexe". Thesis, Troyes, 2014. http://www.theses.fr/2014TROY0015/document.
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Le grenaillage ultrason est un procédé mécanique de traitement de surfaces. Il consiste à projeter des billes à la surface de pièces métalliques, à l’aide d’un système acoustique vibrant ultrasonore. Lors du traitement, les billes sont contenues dans une enceinte spécialement conçue pour la pièce à traiter, et adoptent un comportement similaire à celui d’un gaz granulaire vibré. Le grenaillage ultrason sert à introduire des contraintes résiduelles de compression dans le matériau traité. Ces contraintes de compression sont bénéfiques pour la tenue en fatigue de la pièce et sa résistance à la corrosion sous contraintes.L’objectif des présents travaux de thèse consiste à modéliser la dynamique des billes pendant le traitement, et pour des pièces et géométries complexes. En effet, depuis son industrialisation, la mise au point du procédé se fait de manière empirique qui, avec la complexification des pièces mécaniques traitées pousse cette approche à ses limites. La mise au point peut donc s’avérer coûteuse en temps et aboutir à une solution partiellement optimisée. Ainsi, le modèle développé donne accès à une compréhension détaillée du grenaillage ultrason dans des conditions de traitement industrielles. Il constitue pour la première fois un outil d’aide à la conception des enceintes de traitement, offrant la possibilité d’une meilleure maitrise et optimisation du traitement, tout en réduisant les coûts de mise au point. La seconde contribution est de fournir aux modèles de prédiction des contraintes des données fiables et réalistesUltrasonic shot peening is a mechanical surface treatment process. It consists on projecting spherical shot onto a metallic surface, using an ultrasonic accoustic system. During the treatement, the shot are contained in a chamber, specially designed for the peened part, and behave similarely to a vibrated granular gas. Ultrasonic shot peening is used to introduce compressive residual stresses in the peened material. These compressive stresses help increasing the fatigue life span of the part and its resistance to stress corrosion cracking.The objectif of the present work consists on modeling the shot dynamics of the shot during the traitement, and for complex parts and geometries. Since its industrialization, the choice of the process parameters is done experimentally with trial and error. And with the ever increasing complexity of the peened parts, this approach is reaching its limits; thus becoming sometimes time consuming and providing partially optimized solutions.Therfore, the developped model gives access to a detailed understanding of ultrasonic shot peening in industrial treatment conditions. It represents for the first time a support tool for the design of peening chambers. This offers the possibility of a better control and optimization of the process, while reducing development costs. The second contribution lies in the model capacity to provide reliable and realistic input data to residual stresses prediction models
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Garrad, Mark y n/a. "Computer Aided Text Analysis in Personnel Selection". Griffith University. School of Applied Psychology, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040408.093133.
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This program of research was aimed at investigating a novel application of computer aided text analysis (CATA). To date, CATA has been used in a wide variety of disciplines, including Psychology, but never in the area of personnel selection. Traditional personnel selection techniques have met with limited success in the prediction of costly training failures for some occupational groups such as pilot and air traffic controller. Accordingly, the overall purpose of this thesis was to assess the validity of linguistic style to select personnel. Several studies were used to examine the structure of language in a personnel selection setting; the relationship between linguistic style and the individual differences dimensions of ability, personality and vocational interests; the validity of linguistic style as a personnel selection tool and the differences in linguistic style across occupational groups. The participants for the studies contained in this thesis consisted of a group of 810 Royal Australian Air Force Pilot, Air Traffic Control and Air Defence Officer trainees. The results partially supported two of the eight hypotheses; the other six hypotheses were supported. The structure of the linguistic style measure was found to be different in this study compared with the structure found in previous research. Linguistic style was found to be unrelated to ability or vocational interests, although some overlap was found between linguistic style and the measure of personality. In terms of personnel selection validity, linguistic style was found to relate to the outcome of training for the occupations of Pilot, Air Traffic Control and Air Defence Officer. Linguistic style also demonstrated incremental validity beyond traditional ability and selection interview measures. The findings are discussed in light of the Five Factor Theory of Personality, and motivational theory and a modified spreading activation network model of semantic memory and knowledge. A general conclusion is drawn that the analysis of linguistic style is a promising new tool in the area of personnel selection.
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Garrad, Mark. "Computer Aided Text Analysis in Personnel Selection". Thesis, Griffith University, 2004. http://hdl.handle.net/10072/367424.
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This program of research was aimed at investigating a novel application of computer aided text analysis (CATA). To date, CATA has been used in a wide variety of disciplines, including Psychology, but never in the area of personnel selection. Traditional personnel selection techniques have met with limited success in the prediction of costly training failures for some occupational groups such as pilot and air traffic controller. Accordingly, the overall purpose of this thesis was to assess the validity of linguistic style to select personnel. Several studies were used to examine the structure of language in a personnel selection setting; the relationship between linguistic style and the individual differences dimensions of ability, personality and vocational interests; the validity of linguistic style as a personnel selection tool and the differences in linguistic style across occupational groups. The participants for the studies contained in this thesis consisted of a group of 810 Royal Australian Air Force Pilot, Air Traffic Control and Air Defence Officer trainees. The results partially supported two of the eight hypotheses; the other six hypotheses were supported. The structure of the linguistic style measure was found to be different in this study compared with the structure found in previous research. Linguistic style was found to be unrelated to ability or vocational interests, although some overlap was found between linguistic style and the measure of personality. In terms of personnel selection validity, linguistic style was found to relate to the outcome of training for the occupations of Pilot, Air Traffic Control and Air Defence Officer. Linguistic style also demonstrated incremental validity beyond traditional ability and selection interview measures. The findings are discussed in light of the Five Factor Theory of Personality, and motivational theory and a modified spreading activation network model of semantic memory and knowledge. A general conclusion is drawn that the analysis of linguistic style is a promising new tool in the area of personnel selection.Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Applied Psychology (Health)
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Libros sobre el tema "CATIA (Computer file)"
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Inc, Kogent Learning Solutions. CATIA V6 essentials. Sudbury, Mass: Jones and Bartlett Publishers, 2009.
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Carman, Paul. CATIA reference guide. 2a ed. Santa Fe, NM: OnWord Press, 1998.
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Kornprobst, Patrick. CATIA V5 - Volumenmodellierung: [Grundlagen und Methodik in u ber 100 Konstruktionsbeispielen]. Mu nchen: Hanser, 2007.
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E, Osgood Charles, Watters Christa y American Birding Association, eds. Attu: Birding on the edge : a quarter century of birding the Western reaches of North America. Colorado Springs, Col: Charles E. Osgood and American Birding Association, 2003.
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Kumar, K., J. Paulo Davim y Chikesh Ranjan. Understanding Catia. Taylor & Francis Group, 2021.
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Karam, Fred y Charles D. Kleismit. Using CATIA. OnWord Press (Acquired Titles), 2003.
Buscar texto completoActas de conferencias sobre el tema "CATIA (Computer file)"
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Cheng, Zhenyu, Wei Li, Robert Cheatham, Jianguo Wang, C. Greg Jensen y W. Ed Red. "A Direct Machining System for Commercial CAD/CAM Packages". En ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59992.
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Although modern machine tools and controllers have evolved along with the personal computer over the years, the standard input (M&G code files) for CNC machines has not changed. A new method of control called Direct Machining And Control (DMAC) is being developed at Brigham Young University. DMAC is a revolutionary new paradigm for rapid prototyping and CNC control by directly connecting a CAD system with software based DMAC controller. DMAC technology completely eliminates all intermediate files (APT, M&G code, STEP-NC, etc) between the CAD model and the CNC controller by directly processing the geometric tool path entities that are sent from the CAD/CAM system to the motion buffer of the controller. Direct machining maintains the efficiency and accuracy improvements seen in NURBS tool path representation, and also retains associativity between the CAD model and the tool paths driving the CNC machine tool. This paper presents a Direct Machining system designed to directly connect a commercial CAD/CAM systems (Unigraphics, CATIA, CM2 and Alias) with a software-based DMAC controller. In this paper, Direct Machining, with its requirements and implications, is explored. The overall DMAC architecture is presented. Parts from the Ford GT car were machined on a Tarus five-axis mill by the DMAC system, and were compared with traditional method which used M&G codes.