Academic literature on the topic 'Special machinery and technical tools'
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Journal articles on the topic "Special machinery and technical tools"
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Tepeš, Matic. "Framework proposition and technical guidelines for manufacturers of custom made tools, machinery and special equipment." Tehnicki vjesnik-Technical Gazette 22, no. 3 (June 15, 2015): 581–90. http://dx.doi.org/10.17559/tv-20140114133656.
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Vafadar, Ana, Majid Tolouei-Rad, Kevin Hayward, and Kazem Abhary. "Technical feasibility analysis of utilizing special purpose machine tools." Journal of Manufacturing Systems 39 (April 2016): 53–62. http://dx.doi.org/10.1016/j.jmsy.2016.02.003.
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Ercegovic, Djuro, Dragisa Raicevic, Djukan Vukic, Rade Radojevic, Kosta Gligorevic, Milos Pajic, and Mico Oljaca. "Technical-technological aspects of using machines and tools for new technologies in plant production." Journal of Agricultural Sciences, Belgrade 54, no. 3 (2009): 257–68. http://dx.doi.org/10.2298/jas0903257e.
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Agricultural production is complex process and it depends of various factors which can be controlled. Many of them can be improved by using of various means which are not friendly for environment and health of people. It is necessary to apply only those measures which can maintain and improve physical - mechanical, technological and microbiological properties of soil and also the nutritive potential of soil but will not be harmful for environment. The other part of this story demands decrease of energy necessary in the process of soil preparation. The machinery and tools for new technologies in plant production in Serbia is consisted of: vibrating subsoiler VR-5(7), universal self propelled machine for soil arrangement USM-5, draining plough DP-4 and universal Scraper land leveler, and it is developed to apply changed new technologies of soil preparation. This study gives description of machines, tools and technologies necessary for soil preparation in Serbia; this means preparation of soil surface and depth, special note is given to preservation of environment and improvement of soil potential, but also and how to decrease the energy necessary for the process of soil preparation.
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Zhao, Yu Ping, and Yu Hai Xu. "Electric Machine Technology Needs Analysis of the Linear Motor." Applied Mechanics and Materials 490-491 (January 2014): 1138–41. http://dx.doi.org/10.4028/www.scientific.net/amm.490-491.1138.
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This article is in view of the linear motor aspects of application development in the field of electric machine tool equipment technical requirements analysis, linear motor with its high speed and high acceleration transmission has been in processing center, CNC milling machine, lathe, grinding machine, compound machine, laser is widely used in machine tools and heavy machine tool, in the aerospace, automotive, mold, energy, general machinery in areas such as plays a special role. Linear motor has precise control test system, reasonable matching of the technical indicators, to make it on the electric machine driven by linear motor can realize stable precision mobile and linear motor used for electric spark machine tool is another innovative application achievement of the modern advanced manufacturing industry. Domestic electric machine mostly adopts five axis NC gear rack drive control system, using the linear motor drive control system was still in the stage of research, to promote the linear motor is widely used in the field of electric machine, and the demand analysis.
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Ibaraki, Soichi, and Andreas Archenti. "Special Issue on Machine Accuracy Evaluation." International Journal of Automation Technology 14, no. 3 (May 5, 2020): 359. http://dx.doi.org/10.20965/ijat.2020.p0359.
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The accuracy of a three-dimensional (3D) positioning system can ultimately be evaluated via measurement of a 3D vector between command and actual end-effector positions at arbitrary points over the entire workspace. This is a simple, yet challenging, metrological problem. The motion accuracy of a machine tool is traditionally evaluated on an axis-to-axis basis, with every error motion of every axis being independently measured as part of a one-dimensional measurement process in a different setup. Toward the ultimate goal of 3D position measurement over the entire workspace, research efforts have offered several new, practical measurement technologies. This special issue covers the technical and academic efforts regarding the evaluation of machine tool accuracy. The papers in this special issue clarify the latest research frontiers regarding machine tool accuracy from a metrological viewpoint. In the first paper, by Montavon et al., error calibration technologies and their management are reviewed within the Internet of production concept. Long-term accuracy monitoring and management are clearly among the most crucial technical challenges faced regarding machine tools, and the work by Xing et al. is related to them. Ibaraki et al. presented machining tests to evaluate the thermal distortion of a machine tool. Peukert et al. studied the dynamic interaction between machine tools and their foundations. Various 3D measurement schemes for determining machine error motions have been investigated by many researchers, and some have been implemented in industrial applications. Kenno et al. and Florussen et al. investigated 3D measurement using the R-test for five-axis machines. Miller et al. studied simultaneous measurement of six-degree-of-freedom error motions of a linear axis. Nagao et al. presented an error calibration method for a parallel kinematic machine tool. The editors appreciate the contributions of all the authors, as well as the work of the reviewers. We are confident that this special issue will further encourage research and engineering work for improving the accuracy and performance of machine tools.
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Yuan, Guang Ming, Lei Liu, Hao Chen Wang, Xue Jian Jiao, and Zhan Min Yin. "The Technical Study on Cylinder Cam Machining." Key Engineering Materials 407-408 (February 2009): 99–102. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.99.
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Worm cam mechanism is a common indexing mechanism which is widely used in automatic machinery. Because of its high transmission precision requirements, the mechanism has high demands on the cylinder cam. The machining methods of cylinder cam are unique and the methods of special machine tool and NC machining are the two methods that general adopted in the machining of it. In this paper, the method of CNC Programming which is used for machining cylinder cam in 5-axeses high speed DMU 70eVolution Machining Center is introduced. The machining principle of cylinder cam has been studied, and the mathematical model for CNC Programming has also been worked out. The automated compensation of cutting tool’s radius is used in this field for the first time.
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Cisar, Miroslav, Ivan Kuric, Nadezda Cubonova, Ivan Zajacko, Tomas Dodok, and Anna Rudawska. "Utilization of educational machine tool for training of technical diagnostics based on positioning performance." MATEC Web of Conferences 157 (2018): 01004. http://dx.doi.org/10.1051/matecconf/201815701004.
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The technical diagnostics as essential part of machine tool maintenance provides information about condition of examined machine tool but it requires not only special equipment but also certain level of skill of operators in order to achieve optimal performance. The article is aimed at the set of methods and tools capable of providing realistic simulation of various machine tool conditions in order to allow hone skills necessary for effective diagnostician.
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Pămîntaş, Eugen, and Felicia Veronica Banciu. "V Prism Special for Centering Devices." Applied Mechanics and Materials 371 (August 2013): 74–78. http://dx.doi.org/10.4028/www.scientific.net/amm.371.74.
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Centering cylindrical parts is a very common operation meet in different cutting processes on various types of machine tools. To this purpose they are intended to use auxiliary assemblies known as "centering devices", they can achieve centering "between centers" on exterior or interior cylindrical parts surfaces, and are of the following types: universal, special or specialized, single or multiple. Solutions constructive diversity and the their drive variants known in technical literature is huge and mainly is limited numerically by restrictions related on the one hand, by technical indicators: diameter range of machining parts production batch number, type of the drive, and the machine-tools type that will make his job, positioning accuracy required, and on the other hand, economic indicators: processing costs, cost device maintenance costs. Limiting the topic only to the cylindrical parts with at least two steps of diameters that require centering on outer cylindrical surfaces, the known centering devices variants are reduced mainly to those using pairs of V-shaped prisms and with synchronous movement. The difficulty of working with such devices is the multitude and softness adjustments to be made; so that the part axis remains invariant spatial after fixing the cylindrical part on at least two levels simultaneously. The paper proposes a special prism profiled, used in the construction of such centering device in which one of the operative surfaces of the prism is not flat, but curved surface, which was determined analytically.
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Wegener, Konrad, and Atsushi Matsubara. "Special Issue on Advanced Material Driven Design of Machine Tools." International Journal of Automation Technology 14, no. 2 (March 5, 2020): 261–63. http://dx.doi.org/10.20965/ijat.2020.p0261.
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The design of machine tools strongly depends on the materials chosen. Increasing requirements on machine tools require the joint optimization of material and design and thus also drive the development of new materials in this field. Digital technologies finally creating a digital shadow of the machine in development also enable the required co-development taking into consideration dynamic, thermal and long term influences and behavior, enabling state and health monitoring to increase the performance of the machine tool to the maximum possible. The choice of material for the different components of machine tools is today even more difficult than ever. The recent review paper by Möhring et al. [1] sheds light on the vast field of properties and decision opportunities of combining materials at hand with design features. In former times, cast iron was the predominant material for machine bodies and has left its footprints on the design of machine tool bodies lasting still up to now. Because massive machine bodies have been the wealth of good properties, high accuracy, stiffness, good material damping properties have been attributed to cast iron design, then with increasing strength requirements higher strength cast irons came into fashion having much less material damping and finally lead to welded frames. Today requirements of dynamics and thermal behavior change the scene again. The goal is to achieve high productivity with high accuracy, which typically is a contradiction. But increasing dynamics requires distinguishing between moving bodies and their non-moving counterparts, and opens the floor for multimaterial design. For moving parts, which have to move with high dynamics meaning, high speed, high acceleration, high jerk, light weight design prevailed with the utilization of standard materials. Because manufacturability plays a major role, the bionic structures have to be degraded to thin walled rib structures as demonstrated in Fig. 1, while in future additive manufacturing will remove that restriction and enable some real bionic structures. Furthermore material choice has a huge impact on inertia savings which opens the door for CFRP, which becomes especially interesting, when the anisotropy of this material is exploited as shown in Fig. 2. From the manufacturability truss structures then result shown in Fig. 3. For the nonmoving elements, the base body, cast iron, welded steel, polymer cast, and concrete are typical materials chosen. Also aluminium structures are discussed despite the fact that aluminium has only one third of the stiffness of steel, but it offers much better thermal conductivity equalizing temperature differences faster and thus reduces the warp of the structure, which typically causes larger errors than an isotropic thermal expansion. For the choice of materials no generalizable guideline exists. The question which material is the better choice is not answerable in generality, because design follows material, which means that a sound comparison requires completely new design approaches for the different materials, where the difference between metal and polymer concrete or CFRP is really large, offering different potentials. As an example, a design of a fast moving bridge of a gantry machine might be considered. The guiding of a support on this bridge with roller guidings imposes severe problems to the design due to the material mix and different thermal expansion coefficients. Thus the choice of CFRP for the bridge necessarily must be followed up by a decision of the guiding principle, where in this case aerostatic bearings were considered as the most promising possibility. Also the potentials for function integration into the material are of major interest for the material choice, as this is easily possible for low temperature castings like for mineral cast, CFRP, or concrete. This integration of functionalities actually is a fairly new approach and relates again the machine body design to inspiration from biology, as for instance trees or leaves are from the point of view of materials weaker than our technical materials, but have a fine integration of functionalities as transmittance of information and nourriture. Sensor integration opens the field for “feeling machines” also inspired from biology, which enables the machine to detect its embedding environment and react accordingly. Cheap and miniaturized sensors are on the other side the developments that enable this approach of machine design. In the age of compensation, Industrie 4.0 and biological transformation, this functional integration will have a huge impact on material choice. Also in terms of thermal issues in machine tools, the material choice plays a major role, as thermal elongation is a physical property which is influenced by material choice. A much larger influence comes from design as indicated already above. With growing importance of compensation besides sensor integration, especially the thermal linearity and reproducibility are of crucial importance, which makes multi material design a non-trivial design task. The discussion on the superiority of thermally fast reacting machines or thermally slow reacting machines has not come to an end yet. Problematic are machines composed of components that react fast and those that react slow. A major step in that direction is the discovery of thermal resonances in [5], which shows that temperature change frequencies can depending on the machine design lead to higher or lower thermal displacements of the TCP and therefore need to be taken into account in the design phase and are significantly influenced by the choice of materials. Restrictions and influences are also coming from the process a machine tool has to enable. The material choice must take into account the influence of different media as for instance the metal working fluids as well as the debris like hot chips etc. The aforementioned discussion is mainly a discussion of main structural parts of machine tools. It must be pointed out that a machine tool is more than the sum of its structural elements, as also covers, which typically get forgotten in all academic discussion of behaviors of machine tools, but are significant for the influence of the environment on the machine tool. Also here the material choice plays a major role. Finally material choice to a large extent decides on the costs of a machine tool, but due to the huge amount of influence factors a sound fact based decision requires a nearly full design elaboration of various material choices and the summation of costs at the end of this process. This special issue with its various individual papers elucidates different aspects of the influence of materials on the design of machine tools without being capable of offering clear rules for material choice. ===danraku===1) Isolating material to exclude environmental influences on machine tools is proposed. ===danraku===2) A new guiding system with rollers and sliding guidings is proposed and the different materials for the sliding part are investigated. ===danraku===3) Gears from bamboo fibres are proposed and the manufacturability as well as their performance are discussed. The gears offer great advantages from the environmental point of view. ===danraku===4) CFRP for spindle shafts is evaluated and CFRP spindles are compared with steel spindles within the same geometric boundary conditions. The performance increase in compliance and thermal stability is significant. ===danraku===5) A topological optimization of a grinding machine tool structure is presented and showed drastically increased performance. The difficulty to transfer it to a mass producible machine tool structure is pointed out. ===danraku===6) A design of a CFRP ram for a high speed stamping press is presented and testing procedures to ensure the ability of the ram to withstand billions of impacts are designed and carried out. ===danraku===7) CFRP can beneficially applied for the cutting tool structure and besides enhancing dynamics in terms of mass and damping the material also is a valuable basis for smart tools. There are good arguments for each of the materials, which cover the whole scope of machine tool functionality: manufacturability, stiffness, strength, specific mass, thermal properties, function integrability, reproducibility, availability, environmental friendliness, and costs.
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Zdziarska, Roksana, Agata Biniek, Daniel Grochała, and Mirosław Pajor. "Research on the economic efficiency for technological equipment extending of the kinematic chains on the numerically controlled machines." Mechanik 92, no. 10 (October 7, 2019): 624–26. http://dx.doi.org/10.17814/mechanik.2019.10.80.
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The article describes the selection of machining holders included in the so called special machining fixture-tools. The equipment presented in the work is readily used by technologists as a solution extending the kinematic chain of the machine tool. It enables multi-axis machining (from many sides) using one item clamping. This paper presents the calculation of productivity and its growth through the use of special equipment. The research was carried out for medium-volume production, which is quite a difficult area in the design of technologies and the study of production costs. In the technical development of tooling and modeling of its usage costs, it was assumed to maintain the required level of dimensional and shape accuracy with a simultaneous significant reduction of operating costs. As part of the work, a model was also developed for determining the break-even point of investment in special machining tools that are used on triaxial milling machining centers.
Dissertations / Theses on the topic "Special machinery and technical tools"
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Svoboda, Petr. "Vyhodnocení zásahů jednotek Hasičského záchranného sboru ČR k dopravním nehodám v regionu." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-232799.
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The dissertation deals with the road accident interventions carried out by Fire fighting units and emphasizes average adjustments as well as the problems of forensic engineering. Within the Southern Moravia region, it analyses the statistical data of the Fire Rescue Brigade of the Czech Republic with relation to the road accident interventions, and it analyses the position of the individual units of the Fire Rescue Brigade of the Southern Moravia in the above system. The dissertation discusses relation between the forensic engineering and the Fire Rescue Brigade of Czech Republic and stresses the possibilities of cooperation.
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Aguirre-Esponda, Guillermo Jose. "Evaluation of technical systems at the design stage." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240844.
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Kozla, Dávid. "Stavebně technologický projekt pro Mezinárodní centrum klinického výzkumu Fakultní nemocnice u sv. Anny v Brně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409970.
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This diploma thesis solves the construction technology project of the International Clinical Research Center of the St. Anne’s University Hospital, Brno (ICRC), namely the first stage of the construction of the buildings "B1" and "C1". It tries to design an ideal technological process of construction with respect of local conditions. Technologically it focuses mainly on the issue of special foundation, namely protection of excavation pit with secant pile wall and pile foundation. There are processed technological regulations, time and financial plans, construction budget, control and test plan, plan of heavy equipment and safety or environmental requirements. Everything is supplemented by attachments and drawing documentation.
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Fenollosa, Artés Felip. "Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667421.
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La present tesi doctoral s’ha centrat en el repte d’aconseguir, mitjançant Fabricació Additiva (FA), models per a assaig quirúrgic, sota la premissa que els equips per fer-los haurien de ser accessibles a l’àmbit hospitalari. L’objectiu és facilitar l’extensió de l’ús dels prototips com a eina de preparació d’operacions quirúrgiques, transformant la pràctica mèdica actual de la mateixa manera que en el seu moment ho van fer tecnologies com les que van facilitar l’ús de radiografies. El motiu d’utilitzar FA, en lloc de tecnologies més tradicionals, és la seva capacitat de materialitzar de forma directa les dades digitals obtingudes de l’anatomia del pacient mitjançant sistemes d’escanejat tridimensional, fent possible l’obtenció de models personalitzats. Els resultats es centren en la generació de nou coneixement sobre com aconseguir equipaments d’impressió 3D multimaterials accessibles que permetin l’obtenció de models mimètics respecte als teixits vius. Per facilitar aquesta buscada extensió de la tecnologia, s’ha focalitzat en les tecnologies de codi obert com la Fabricació per Filament Fos (FFF) i similars basades en líquids catalitzables. La recerca s’alinea dins l’activitat de desenvolupament de la FA al CIM UPC, i en aquest àmbit concret amb la col·laboració amb l’Hospital Sant Joan de Déu de Barcelona (HSJD). El primer bloc de la tesi inclou la descripció de l’estat de l’art, detallant les tecnologies existents i la seva aplicació a l’entorn mèdic. S’han establert per primer cop unes bases de caracterització dels teixits vius -sobretot tous- per donar suport a la selecció de materials que els puguin mimetitzar en un procés de FA, a efectes de millorar l’experiència d’assaig dels cirurgians. El caràcter rígid dels materials majoritàriament usats en impressió 3D els fa poc útils per simular tumors i altres referències anatòmiques. De forma successiva, es tracten paràmetres com la densitat, la viscoelasticitat, la caracterització dels materials tous a la indústria, l’estudi del mòdul elàstic de teixits tous i vasos, la duresa d’aquests, i requeriments com l’esterilització dels models. El segon bloc comença explorant la impressió 3D mitjançant FFF. Es classifiquen les variants del procés des del punt de vista de la multimaterialitat, essencial per fer models d’assaig quirúrgic, diferenciant entre solucions multibroquet i de barreja al capçal. S’ha inclòs l’estudi de materials (filaments i líquids) que serien més útils per mimetitzar teixits tous. Es constata com en els líquids, en comparació amb els filaments, la complexitat del treball en processos de FA és més elevada, i es determinen formes d’imprimir materials molt tous. Per acabar, s’exposen sis casos reals de col·laboració amb l’HJSD, una selecció d’aquells en els que el doctorand ha intervingut en els darrers anys. L’origen es troba en la dificultat de l’abordatge d’operacions de resecció de tumors infantils com el neuroblastoma, i a la iniciativa del Dr. Lucas Krauel. Finalment, el Bloc 3 té per objecte explorar nombrosos conceptes (fins a 8), activitat completada al llarg dels darrers cinc anys amb el suport dels mitjans del CIM UPC i de l’activitat associada a treballs finals d’estudis d’estudiants de la UPC, arribant-se a materialitzar equipaments experimentals per validar-los. La recerca ampla i sistemàtica al respecte fa que s’estigui més a prop de disposar d’una solució d’impressió 3D multimaterial de sobretaula. Es determina que la millor via de progrés és la de disposar d’una pluralitat de capçals independents a fi de capacitar la impressora 3D per integrar diversos conceptes estudiats, materialitzant-se una possible solució. Cloent la tesi, es planteja com seria un equipament d’impressió 3D per a models d’assaig quirúrgic, a fi de servir de base per a futurs desenvolupaments.La presente tesis doctoral se ha centrado en el reto de conseguir, mediante Fabricación Aditiva (FA), modelos para ensayo quirúrgico, bajo la premisa que los equipos para obtenerlos tendrían que ser accesibles al ámbito hospitalario. El objetivo es facilitar la extensión del uso de modelos como herramienta de preparación de operaciones quirúrgicas, transformando la práctica médica actual de la misma manera que, en su momento, lo hicieron tecnologías como las que facilitaron el uso de radiografías. El motivo de utilizar FA, en lugar de tecnologías más tradicionales, es su capacidad de materializar de forma directa los datos digitales obtenidos de la anatomía del paciente mediante sistemas de escaneado tridimensional, haciendo posible la obtención de modelos personalizados. Los resultados se centran en la generación de nuevo conocimiento para conseguir equipamientos de impresión 3D multimateriales accesibles que permitan la obtención de modelos miméticos respecto a los tejidos vivos. Para facilitar la buscada extensión de la tecnología, se ha focalizado en las tecnologías de código abierto como la Fabricación por Hilo Fundido (FFF) y similares basadas en líquidos catalizables. Esta investigación se alinea dentro de la actividad de desarrollo de la FA en el CIM UPC, y en este ámbito concreto con la colaboración con el Hospital Sant Joan de Déu de Barcelona (HSJD). El primer bloque de la tesis incluye la descripción del estado del arte, detallando las tecnologías existentes y su aplicación al entorno médico. Se han establecido por primera vez unas bases de caracterización de los tejidos vivos – principalmente blandos – para dar apoyo a la selección de materiales que los puedan mimetizar en un proceso de FA, a efectos de mejorar la experiencia de ensayo de los cirujanos. El carácter rígido de los materiales mayoritariamente usados en impresión 3D los hace poco útiles para simular tumores y otras referencias anatómicas. De forma sucesiva, se tratan parámetros como la densidad, la viscoelasticidad, la caracterización de materiales blandos en la industria, el estudio del módulo elástico de tejidos blandos y vasos, la dureza de los mismos, y requerimientos como la esterilización de los modelos. El segundo bloque empieza explorando la impresión 3D mediante FFF. Se clasifican las variantes del proceso desde el punto de vista de la multimaterialidad, esencial para hacer modelos de ensayo quirúrgico, diferenciando entre soluciones multiboquilla y de mezcla en el cabezal. Se ha incluido el estudio de materiales (filamentos y líquidos) que serían más útiles para mimetizar tejidos blandos. Se constata como en los líquidos, en comparación con los filamentos, la complejidad del trabajo en procesos de FA es más elevada, y se determinan formas de imprimir materiales muy blandos. Para acabar, se exponen seis casos reales de colaboración con el HJSD, una selección de aquellos en los que el doctorando ha intervenido en los últimos años. El origen se encuentra en la dificultad del abordaje de operaciones de resección de tumores infantiles como el neuroblastoma, y en la iniciativa del Dr. Lucas Krauel. Finalmente, el Bloque 3 desarrolla numerosos conceptos (hasta 8), actividad completada a lo largo de los últimos cinco años con el apoyo de los medios del CIM UPC y de la actividad asociada a trabajos finales de estudios de estudiantes de la UPC, llegándose a materializar equipamientos experimentales para validarlos. La investigación amplia y sistemática al respecto hace que se esté más cerca de disponer de una solución de impresión 3D multimaterial de sobremesa. Se determina que la mejor vía de progreso es la de disponer de una pluralidad de cabezales independientes, a fin de capacitar la impresora 3D para integrar diversos conceptos estudiados, materializándose una posible solución. Para cerrar la tesis, se plantea cómo sería un equipamiento de impresión 3D para modelos de ensayo quirúrgico, a fin de servir de base para futuros desarrollos.
Books on the topic "Special machinery and technical tools"
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Li, Weidong. Cloud Manufacturing: Distributed Computing Technologies for Global and Sustainable Manufacturing. London: Springer London, 2013.
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Mario, Rapisarda, and Check Albert F, eds. Machine tool and manufacturing technology. Albany: Delmar Publishers, 1998.
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Sil'vestrov, Sergey, Vladimir Starovoytov, Vladimir Bauer, Aleksandr Selivanov, Vladimir Lepskiy, Aleksandr Raykov, Svetlana Lipina, et al. Strategic planning in the public sector of the economy. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1081855.
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This collective monograph continues a series of scientific studies and publications on the problems of strategic planning, which have been carried out for several years at the Financial University under the Government of the Russian Federation with the involvement of specialists from other scientific and educational organizations. A series of research papers in 2017-2019 was devoted to the analysis of strategic development risks and the analysis of global strategic planning practice, the general methodology of strategic planning and forecasting (including in the context of ensuring Russia's economic security), the approach to the formation of life cycles of preparation and revision of strategic planning documents and their comparative analysis, the experience of coordinating budget, project and process types of management and financing, monitoring risks and threats, the use of new information tools in the strategic planning complex, including blockchain, and also naturally develops such aspects of previous research as analysis of world practice, coordination of budget, project and process types of management and financing, the use of information technologies. However, at the same time, a special task was set — to approach a comprehensive analysis of the strategic planning process as a whole, especially to study its documentary support as the core of the organization of this process and the implementation of its results in the practice of public administration, as well as to analyze the scientific support of strategic planning as an essential aspect of all strategic planning and strategic management activities in the entirety of its aspects (goal setting, forecast, design, programming, planning, control and audit).
It is intended for specialists from the humanities, natural sciences and technical fields of knowledge focused on management and development problems, for undergraduates and postgraduates, as well as for a wide audience of management practitioners, including those related to strategic planning processes in the public sector.
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Technical manual, general support maintenance repair parts and special tools lists: (includeng depot maintenance repair parts and special tools)... [Washington, DC]: Headquarters, Dept. of the Army, 1993.
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Hydraulic Failure Analysis: Fluids, Components, and System Effects (Astm Special Technical Publication// Stp). ASTM International, 2001.
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Krar, Steve, Albert F. Check, and Mario Rapisarda. Machine Tool And Manufacturing Technology (Machine Tools). Cengage Delmar Learning, 1997.
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Braun, S., S. Rakheja, Y. Stepanenko, and Quebec) Conference on Mechanical Vibration and Noise (12th : 1989 : Montre´al. Diagnostics Vehicle Dynamics and Special Topics: Presented at the 1989 Asme Design Technical Conferences 12th Biennial Conference on Mechanical Vibr (De ... Design Engineering Division), V. 18-5.). Amer Society of Mechanical, 1989.
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Li, Weidong, and Jörn Mehnen. Cloud Manufacturing: Distributed Computing Technologies for Global and Sustainable Manufacturing. Springer, 2015.
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Li, Weidong, and Jörn Mehnen. Cloud Manufacturing: Distributed Computing Technologies for Global and Sustainable Manufacturing. Springer, 2013.
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S, Sankar T., American Society of Mechanical Engineers. Vibrations and Sound Committee., and Conference on Mechanical Vibration and Noise (12th : 1989 : Montréal, Québec), eds. Diagnostics, vehicle dynamics, and special topics: Presented at the 1989 ASME design technical conferences, 12th Biennial Conference on Mechanical Vibration and Noise, Montreal, Quebec, Canada, September 17-21, 1989. New York, N.Y: American Society of Mechanical Engineers, 1989.
Find full textBook chapters on the topic "Special machinery and technical tools"
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Vieri, Marco, Daniele Sarri, Stefania Lombardo, Marco Rimediotti, Riccardo Lisci, Valentina De Pascale, Eleonora Salvini, Carolina Perna, and Andrea Pagliai. "Tech innovation systems in agriculture." In Manuali – Scienze Tecnologiche, 4. Florence: Firenze University Press, 2020. http://dx.doi.org/10.36253/978-88-5518-044-3.04.
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The technological models related to farm machinery have had a different evolution in relation to structural and social conditions. Thus we have the American - Western model, capital intensive, with large machines and at the opposite the Asian model, labor intensive, with small and sophisticated machines suitable for small and family farms. Even if, in the large scale machinery, the implementation of new technologies requires less investment in percentage, all farm technical management system may have advantages by the new technology: a) measuring parameters and processes, b) assessing data by informatics models giving information optimization c) availabilit6y of tools to manage the single specific resource. That is Precision Farming.
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Gowanlock, Jordan. "Conclusion: Engineering Movies." In Palgrave Animation, 171–80. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74227-0_7.
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AbstractThe conclusion to Animating Unpredictable Effects argues for the importance of understanding engineering and R&D as a part of animation and visual effects production, in opposition to critics who dismiss these as mere tools for hyperrealism. This provides for a better understanding of a diverse range of contemporary digital media production practices that involve extensive technical work, but it also sheds light on film production practices going back a century. Using the example of practical special effects, like puffs of smoke or splashing waves in a studio water tank, which create unpredictable motion under artificial conditions, the conclusion draws a long history of practices that represent the world by making artificial mechanisms rather than capturing or drawing images.
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Capogrosso, Roberta, Giulia De Aloysio, Luca Laghi, Roberto Malvezzi, Eraldo Menconi, Marco Padula, Francesca Pecchia, Ángel Ruìz Cruceira, José Manuel Salmeròn Lissén, and Paolo Luigi Scala. "Deep Energy Retrofit of Residential Buildings in the Mediterranean Area: The MedZEB Approach." In Smart and Sustainable Planning for Cities and Regions, 29–45. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-57764-3_3.
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AbstractMediterranean deep retrofit markets are characterized by common barriers and bottlenecks, which barely have been identified as shared challenges, and this has led to a lack of dedicated solutions and to a substantial delay in achieving the 2020 EU policy targets. This situation is addressed by the H2020 HAPPEN project by proposing a new MedZEB approach characterized by the following features: Holistic, i.e., aimed at integrating the most relevant aspects of the retrofitting supply chain; Transparent, i.e., aimed at putting on the market novel tools for enhancing investors’ trust; Adaptive, i.e., aimed at enhancing “added values” of the retrofitting such as flexibility, well-being, etc. Having arrived at its midpoint, HAPPEN has produced an advanced version of its main outputs, among which are: the HAPPEN cost-optimal technical solutions, developed according to a step-by-step logic; the HAPPEN financial solution, fully integrated with the step-by-step logic, and aimed at funding the retrofitting process by relying on the energy savings achieved; the MedZEB protocol conceived as a guarantee scheme for the achievement of retrofit targets; the HAPPEN platform, an assisted digital marketplace aimed at matching demand and offer according to a one-stop-shop logic, at defragmenting the retrofit value chain, and at supporting actors with dedicated tools. These outputs have been developed also thanks to an extensive living laboratory and pilot-building program, carried out within ten pilot sites across seven EU Med countries; this has made it possible for a large engagement of potential users, which resulted in the ideation of the HAPPEN program, an overall framework aimed at integrating project outputs into an exploitable renovation procedure powered by the HAPPEN platform. This paper describes the first simulation of such a procedure in its entirety based on a real case study. After characterizing the building according to the HAPPEN reference buildings and climates lists, a step-by-step cost-optimal package of solutions was calculated, followed by the application of the HAPPEN financial solution, and by the draft issue of the MedZEB protocol. Results provide the first evidence of the effectiveness of the MedZEB approach in potentially unlocking the deep retrofit market in the Med area, with special attention to the possibility of funding the interventions by relying on the economies generated by the energy savings achieved. Further, the project activities will be aimed at co-creating, together with relevant stakeholders, a go-to-market strategy for the HAPPEN program.
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Gurbuz, Ali, and Ozge Nilay Erbalaban Gürbüz. "The Relationship of Human Intelligence With Technique/Technology." In Present and Future Paradigms of Cyberculture in the 21st Century, 174–201. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-5225-8024-9.ch010.
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The history of creating technical/technological tools continues, from the days when man designed the first tools to the days when artificial intelligence was designed. In this adventure, which ranges from the production of the first tools to the development of the method of burning fire, from communication tools to the idea of society as a technical abstraction, from war tools to clocks, machines, automatons, and artificial intelligence, will be analyzed the functions of intelligence philosophically and historically. Today's cybernetic societies, where artificial intelligence is developed, are a natural consequence of the technical/technological evolution of human intelligence. In this transition period, where the creation of artificial intelligence and the anthropological future of the human species are discussed together, the perspectives of philosophical culture that are stuck between artificial and natural dilemmas will be explored. Through analysis of Steven Spielberg's Artificial Intelligence film, the meaning of cyber future perception in culture will be revealed.
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Loew, Katharina. "“German Technique” and Hollywood." In Special Effects and German Silent Film. Nieuwe Prinsengracht 89 1018 VR Amsterdam Nederland: Amsterdam University Press, 2021. http://dx.doi.org/10.5117/9789463725231_ch06.
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In the mid-1920s, the innovative imagery and emotional force of German films startled American critics and filmmakers. Well-known directors like F. W. Murnau and Paul Leni were invited to Hollywood, and their American films showcased a range of unconventional camera effects, in particular moving camera feats and extreme camera angles. What galvanized American commentators about these methods was the realization that cinematic devices could be used to visualize affective content. German filmmakers proffered a novel model of cinematic immersion, which augmented the audience’s absorption in the story world with figurative levels of meaning. Prompted by objectives originating in techno-romantic thought, Hollywood began to pay increased attention to the expressive potential of technical tools, with lasting effects on American filmmaking.
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Mitchem, Katherine, Gail Fitzgerald, and Kevin Koury. "Electronic Performance Support System (EPSS) Tools to Enhance Success in School for Secondary Students with Special Needs." In Handbook of Research on New Media Literacy at the K-12 Level, 529–49. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-120-9.ch034.
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This chapter introduces the use of electronic performance support systems (EPSS) as an assistive technology for students with mild disabilities, especially those with special learning and behavioral needs. This approach is a new development to use technology to support students in educational environments. In this chapter, the authors describe the need, rationale and technical development process of an electronic performance support system (EPSS), StrategyTools, a software program designed to support the successful integration of secondary students with mild disabilities in inclusive classrooms. In addition, they report the results from two federally funded projects related to research-based social and behavioral outcomes for secondary students and discuss recommendations for implementation of EPSS tool approaches. The authors hope this information on the innovative use of EPSS to support students with mild disabilities will improve success at school through the innovative use of technology.
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Medárová, Valéria. "E-Learning Tools Applied in Teaching English at the University Level." In Multicultural Awareness and Technology in Higher Education, 156–75. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-5876-9.ch008.
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The chapter gives an overview of the current literature on e-learning goals and theoretical background of design of e-learning courses. Conditions of successful implementation of e-learning include technical, organizational, pedagogical, and psychological conditions. The chapter explains terms such as computer-assisted language learning and digital literacy. The author clarifies some issues related to efficient e-learning course delivery, including the learner and teacher perception. A practical example of an online Business English course in the Moodle system at the university level is analyzed. Student and instructor feedback provides insight into problems and obstacles in learning languages in the online mode. The chapter offers recommendations for online course design and lists issues that need special attention and that will be addressed in future research.
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N.S. Sampaio, Pedro, and Carla Brites. "Near-Infrared Spectroscopy and Machine Learning: Analysis and Classification Methods of Rice." In Rice [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99017.
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Nowadays, the conventional biochemical methods used to differentiate and characterize rice types, biochemical properties, authentication, and contamination issues are difficult to implement due to the high cost of reagents, time requirement and environmental issues. Actually, the success of agri-food technology is directly related to the quality of analysis of experimental data acquired by sensors or techniques such as the infrared-spectroscopy. To overcome these technical limitations, a rapid and non-destructive methodology for discrimination and classification of rice has been investigated. Near-infrared spectroscopy is considered as fast, clean, and non-destructive analytical tools and its spectra present significant biomolecular information that must be analysed by sophisticated methodologies. Machine learning plays an important role in the analysis of the spectral data being used several methods such as Partial Least Squares, Principal Component Analysis, Partial Least Squares-Discriminant Analysis, Support Vector Machine, Artificial Neuronal Network, among others which can successfully be applied for food classification and discrimination as well as in terms of authentication and contamination issues. The quality control of rice is extremely important at every stage of production, beginning with estimation of raw agricultural materials and monitoring their quality during storage, estimating food quality during the production process and of the final products as well as the determination of their authenticity and the detection of adulterants.
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Mitchem, Katherine, Gail Fitzgerald, and Kevin Koury. "Electronic Performance Support System (EPSS) Tools to Support Teachers and Students." In Transforming K-12 Classrooms with Digital Technology, 98–118. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4538-7.ch006.
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This chapter describes the use of a family of Electronic Performance Support Systems (EPSS) to support teachers and students with mild disabilities, especially those with special learning and behavioral needs. This approach uses technology to support students in educational environments. In this chapter, the authors provide a brief overview of the family of tools and describe the need, rationale, and technical development process of the latest tools in the family, PictureTools™ and PictureTools-Mobile™. These tools are designed to support positive behaviors of young children, incorporate both images and video, and in the case of PT-Mobile, the capacity to run on iPod and iPad. In addition, they report the results from two federally funded projects related to development, usability, and feasibility testing of these tools. Future research directions are discussed.
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Valderrama, C., L. Jojczyk, and P. Possa. "Trends in Reconfigurable Embedded Systems." In Reconfigurable Embedded Control Systems, 130–66. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-086-0.ch006.
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This chapter presents reconfigurable embedded systems by looking closely at three different but inter-related aspects: design tools, methodologies and architectures, paying special attention at reconfigurable interconnections. The authors will start having a closer look at the evolution of the latest design strategies, tools and methodologies facing challenges and user requirements. Reconfigurable interconnections will be analyzed, examining topologies, drawbacks, and capabilities, specially focusing on the reconfiguration potential. From the application point of view, the authors will resume with a case study regarding embedded systems, a Software-Defined Radio application highlighting the most significant technical features and design choices.
Conference papers on the topic "Special machinery and technical tools"
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Kipfmu¨ller, Martin, and Christian Munzinger. "Efficient Simulation of Parallel Kinematic Machine Tools." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86769.
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Today’s machine tool industry mainly consists of small and medium-sized enterprises. Thus, the simulation of new products often does not seem to be cost effective due to the small number of items produced and the high cost of simulation tools. Nevertheless, the use of simulation tools is essential in order to tap the full potential of new challenging concepts like parallel kinematic machines. This paper presents a simulation method supporting the development process of parallel kinematic machine tools from the first concept to the prototype. In order to render the method applicable for the machine tool industry, a special focus is placed on tool efficiency. A modular modeling concept will ensure that the structure of the first kinematic model of the concept phase can be enhanced during the development process and developed into more detailed models, e.g. for dimensioning calculations or to study the dynamic behavior of machine tools. Thus, the method efficiently supports the whole development process with a simulation model gradually increasing in detail according to the requirements of the machine tool designer.
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Gaines, Daniel M., and Caroline C. Hayes. "A Constraint-Based Algorithm for Reasoning About the Shape Producing Capabilities of Cutting Tools in Machined Parts." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dfm-4322.
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Abstract The tools and processes available in a given shop greatly influence the way in which manufacturers view a part and the way in which they decompose it into manufacturable volumes (features). It would be very useful to manufacturers to have an automated process planning assistant that would allow them 1) to specify their own, possibly special purpose, and 2) show them the impact that adding those tools will have on the way in which the part can be decomposed into features and on the manufacturing methods that can be used in the process plan. In this paper, we present 1) Tool-Editor, which allows users to enter their own tool shapes in a specification derived from the National Institute of Standards and Technologies’ specification for manufacturing resources; and 2) Tool-Mapper, a method for identifying the regions of the part that each tool can produce and generating a method which describes how the tools can make the identified shapes. If the first stage of traditional process planning can be viewed as translating features into processes, then Tool-Mapper can be viewed as the reverse process in which tools are translated into shapes. The benefit offered by tool-mapping is that it provides a mechanism for allowing users to input tools specific to their shop, without requiring them to reprogram the system, or to perform more knowledge acquisition to determine the impact of changing the tools.
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Shamblin, Scott A., and Gloria J. Wiens. "Characterization of Dynamics in Special 6-6 PKMs." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/mech-14165.
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Abstract This paper presents a study on the contributions of the dynamics on the performance of a special 6-6 parallel kinematic mechanisms, with application to machine tools. Using Kane’s method, the dynamics equations of motion are derived with inclusion of the strut masses. Comparative observations are made using both workspace and sample trajectory based characterizations.
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Mauricio, Alexandre, Junyu Qi, and Konstantinos Gryllias. "Vibration Based Condition Monitoring of Wind Turbine Gearboxes Based on Cyclostationary Analysis." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76993.
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Wind industry experiences a tremendous growth during the last few decades. As of the end of 2016, the worldwide total installed electricity generation capacity from wind power amounted to 486,790 MW, presenting an increase of 12.5% compared to the previous year. Nowadays wind turbine manufacturers tend to adopt new business models proposing total health monitoring services and solutions, using regular inspections or even embedding sensors and health monitoring systems within each unit. Regularly planned or permanent monitoring ensures a continuous power generation and reduce maintenance costs, prompting specific actions when necessary. The core of wind turbine drivetrain is usually a complicated planetary gearbox. One of the main gearbox components which are commonly responsible for the machinery breakdowns are rolling element bearings. The failure signs of an early bearing damage are usually weak compared to other sources of excitation (e.g. gears). Focusing towards the accurate and early bearing fault detection, a plethora of signal processing methods have been proposed including spectral analysis, synchronous averaging and enveloping. Envelope analysis is based on the extraction of the envelope of the signal, after filtering around a frequency band excited by impacts due to the bearing faults. Kurtogram has been proposed and widely used as an automatic methodology for the selection of the filtering band, being on the other hand sensible in outliers. Recently an emerging interest has been focused on modelling rotating machinery signals as cyclostationary, which is a particular class of non-stationary stochastic processes. Cyclic Spectral Correlation and Cyclic Spectral Coherence have been presented as powerful tools for condition monitoring of rolling element bearings, exploiting their cyclostationary behaviour. In this work a new diagnostic tool is introduced based on the integration of the Cyclic Spectral Coherence along a frequency band that contains the diagnostic information. A special procedure is proposed in order to automatically select the filtering band, maximizing the corresponding fault indicators. The effectiveness of the methodology is validated using the National Renewable Energy Laboratory (NREL) wind turbine gearbox vibration condition monitoring benchmarking dataset which includes various faults with different levels of diagnostic complexity.
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Mauricio, Alexandre, Shuangwen Sheng, and Konstantinos Gryllias. "Condition Monitoring of Wind Turbine Planetary Gearboxes Under Different Operating Conditions." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91136.
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Abstract Digitally enhanced services for wind power could reduce Operations and Maintenance (O&M) costs as well as the Levelised Cost Of Energy (LCOE). Therefore, there is a continuous need for advanced monitoring techniques which can exploit the opportunities of Internet of Things (IoT) and Big Data Analytics, revolutionizing the future of the energy sector. The heart of wind turbines is a rather complex epicyclic gearbox. Among others, extremely critical gearbox components which are often responsible for machinery stops are the rolling element bearings. The vibration signatures of bearings are rather weak compared to other components, such as gears, and as a result an extended number of signal processing techniques and tools have been proposed during the last decades, focusing towards accurate, early, and on time bearing fault detection with limited false alarms and missed detections. Envelope Analysis is one of the most important methodologies, where an envelope of the vibration signal is estimated usually after filtering around a frequency band excited by impacts due to the bearing faults. Different tools, such as Kurtogram, have been proposed in order to accurately select the optimum filter parameters (center frequency and bandwidth). Cyclic Spectral Correlation and Cyclic Spectral Coherence, based on Cyclostationary Analysis, have been proved as very powerful tools for condition monitoring. The monitoring techniques seem to have reached a mature level in case a machinery operates under steady speed and load. On the other hand, in case the operating conditions change, it is still unclear whether the change of the monitoring indicators is due to the change of the health of the machinery or due to the change of the operating parameters. Recently, the authors have proposed a new tool called IESFOgram, which is based on Cyclic Spectral Coherence and can automatically select the filtering band. Furthermore, the Cyclic Spectral Coherence is integrated along the selected frequency band leading to an Improved Envelope Spectrum. In this paper, the performance of the tool is evaluated and further extended on cases operating under different speeds and different loads. The effectiveness of the methodology is tested and validated on the National Renewable Energy Laboratory (NREL) wind turbine gearbox vibration condition monitoring benchmarking data set which includes various faults with different levels of diagnostic complexity as well as various speed and load operating conditions.
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Davis, James, Jason Scott, Janos Sztipanovits, Gabor Karsai, and Marcus Martinez. "An Integrated Multi-Domain Analysis Environment for High Consequence Systems." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/cie-5532.
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Abstract Modeling and analysis of high consequence, high assurance systems requires special modeling considerations. System safety and reliability information must be captured in the models. Previously, high consequence systems were modeled using separate, disjoint models for safety, reliability, and security. The MultiGraph Architecture facilitates the implementation of a model-integrated system for modeling and analysis of high assurance systems. Among the tools used for analyzing safety and reliability are a behavioral simulator and an automatic fault tree generation and analysis tool. Symbolic model checking techniques are used to efficiently investigate the system models. A method for converting finite state machine models to ordered binary decision diagrams allows the application of symbolic model checking routines to the system models. This integrated approach to modeling and analysis of high consequence systems ensures consistency between the models and the different analysis tools.
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Gryllias, Konstantinos, Simona Moschini, and Jerome Antoni. "Application of Cyclo-Non-Stationary Indicators for Bearing Monitoring Under Varying Operating Conditions." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64443.
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Condition monitoring assesses the operational health of rotating machinery, in order to provide early and accurate warning of potential failures such that preventative maintenance actions may be taken. To achieve this target, manufacturers start taking on the responsibilities of engine condition monitoring, by embedding health monitoring systems within each engine unit and prompting maintenance actions when necessary. Several types of condition monitoring are used including oil debris monitoring, temperature monitoring and vibration monitoring. Among them, vibration monitoring is the most widely used technique. Machine vibro-acoustic signatures contain pivotal information about its state of health. The current work focuses on one part of the diagnosis stage of condition monitoring for engine bearing health monitoring as bearings are critical components in rotating machinery. A plethora of signal processing tools and methods applied at the time domain, the frequency domain, the time-frequency domain and the time-scale domain have been presented in order to extract valuable information by proposing different diagnostic features. Among others, an emerging interest has been reported on modeling rotating machinery signals as cyclostationary, which is a particular class of non-stationary stochastic processes. A process x(t) is said to be nth-order cyclostationary with period T if its nth-order moments exist and are periodic with period T. Several tools, such as the Spectral Correlation Density (SCD) and the Cyclic Modulation Spectrum (CMS) can be used in order to extract interesting information concerning the cyclic behavior of cyclostationary signals. In order to measure the cyclostationarity from order 1 to 4, concise and global indicators have been proposed. However, in a number of applications such as aircraft engines and wind turbines the characteristic vibroacoustic signatures of rotating machinery depend on the operating conditions of the rotational speed and/or the load. During the last decades fault diagnostics of rotating machinery under variable speed/load has attracted a lot of interest. The classical cyclostationary tools can be used under the assumption that the speed of machinery is constant or nearly constant, otherwise the vibroacoustic signal becomes cyclo-non-stationary. In order to overcome this limitation a generalization of both SCD and CMS functions have been proposed displaying cyclic Order versus Frequency. The goal of this paper is to propose a novel approach for the analysis of cyclo-nonstationary signals based on the generalization of indicators of cyclostationarity in order to cover the speed varying conditions. The proposed indicators of cyclo-non-stationarity (ICNS) are expected to summarize the information at various statistical orders and at lower computational cost compared to the Order-Frequency SCD or CMS. This generalization is realized by introducing a new speed-dependent angle averaging operator. The effectiveness of the approach is evaluated on an acceleration signal captured on the casing of an aircraft engine gearbox, provided by SAFRAN, in the frames of SAFRAN contest which took place at the Surveillance 8 International Conference.
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Kawasaki, Kazumasa, and Kazuyoshi Shinma. "Accuracy of Straight Bevel Gear by End Mill Using CNC Milling Machine." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34053.
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Straight bevel gears are usually manufactured with various machines and systems, and the tooth profiles are produced by grinding or machining by means of a tool with many cutting edges. In recent years, the straight bevel gear has been manufactured by an end mill using a CNC milling machine because the use of the auxiliary apparatus, special cutters, and special machine tools are not needed. Using this method, the gear manufacturing with high accuracy is important problem. In this paper, the coordinate measurement of the straight bevel gear manufactured in this method is performed and the gear accuracy is evaluated. The tooth profiles of a straight bevel gear generated by a quasicomplementary crown gear instead of a conventional complementary crown gear is introduced. For this study, first the tooth profiles of the straight bevel gear were modeled using a 3D-CAD system and the gear was manufactured by an end mill using a CNC milling machine based on a CAM process. Afterward, the coordinates of many points on the gear tooth surfaces were measured at random using a coordinate measuring machine. This coordinate measurement provides the information about the factors relation to the gear accuracy such as pressure angle, tooth angle error, root cone angle, and apex to back and so on. Therefore, the values of the above factors were estimated and were compared with the theoretical ones, respectively.
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Nassef, Ashraf O., Hesham A. Hegazi, and Sayed M. Metwalli. "Design of C-Frames Using Real-Coded Genetic Optimization Algorithms and NURBS." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/cie-9138.
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Abstract C-frames constitute a large portion of machine tools that are currently used in industry. Examples of these frames include drilling machines, presses, punching and stamping machines, clamps, hooks, etc. The design parameters of these frames include the dimensions of their cross-sections, which should be chosen to withstand the applied loads and minimize the element’s overall weight. Traditionally, the cross-section of C-frame belonged to a set of primitive shapes, which included I, T, trapezoidal and rectangular sections. This paper introduces a new methodology for designing the frame’s cross-section. The cross-sectional shape is represented using non-uniform rational B-Spline (NURBS) in order to give it a form of shape flexibility. A special form of genetic algorithms known as real-coded genetic algorithms is used to conduct the search for the design objectives. Real-coded genetic algorithms are known to outperform the simple binary representation genetic algorithms when dealing with continuous search spaces. The results showed that the optimal shape was a semi I/T-section with the material bulk related to the applied load.
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Mauricio, Alexandre, Dustin Helm, Markus Timusk, Jerome Antoni, and Konstantinos Gryllias. "Novel Cyclo-Non-Stationary Indicators for Monitoring of Rotating Machinery Operating Under Speed and Load Varying Conditions." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-15245.
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Abstract Condition monitoring arises as a valuable industrial process in order to assess the health of rotating machinery, providing early and accurate warning of potential failures and allowing for the planning and effective realization of preventative maintenance actions. Nowadays machinery (gas turbines, wind turbines etc.) manufacturers adopt new business models, providing not only the equipment itself but additionally taking on responsibilities of condition monitoring, by embedding sensors and health monitoring systems within each unit and prompting maintenance actions when necessary. Among others, rolling element bearings are one of the most critical components in rotating machinery. In complex machines the failure indications of an early bearing damage are weak compared to other sources of excitations (e.g. gears, shafts, rotors etc.). Vibration analysis is most widely used and various methods have been proposed, including analysis in the time and frequency domain. In a number of applications, changes in the operating conditions (speed/load) influence the vibration sources and change the frequency and amplitude characteristics of the vibroacoustic signature, making them nonstationary. Under changing environments, where speed and load vary, the assumption of quasi-stationary is not appropriate and as a result a number of time-frequency and time-order representations have been introduced, such as the Short Time Fourier Transform and the Wavelets. Recently an emerging interest has been focused on modelling rotating machinery signals as cyclostationary, which is a particular class of non-stationary stochastic processes. The classical cyclostationary tools, such as the Cyclic Spectral Correlation Density (CSCD) and the Cyclic Modulation Spectrum (CMS), can be used in order to extract interesting information about the cyclic behavior of cyclostationary signals, only under the assumption that the speed of machinery is constant or nearly constant. Global diagnostic indicators have been proposed as a measure of cyclostationarity under steady operating conditions. In order to overcome this limitation a generalization of both SCD and CMS functions have been proposed displaying cyclic Order versus Frequency as well as diagnostic indicators of cyclo-non-stationarity in order to cover the speed varying operating conditions. The scope of this paper is to propose a novel approach for the analysis of cyclo-non-stationary signals based on the generalization of indicators of cyclo-non-stationarity in order to cover the simultaneous and independently varying speed and load operating conditions. The effectiveness of the approach is evaluated on simulated and real signals captured on a dedicated test rig.