1,721,020 research outputs found
SuperJet 100 new interiors
No full textFilmato di presentazione dei nuovi interni del velivolo SuperJet100, realizzato mediante modelli digitali e simulazioni virtuali.
Presentato al farnborough international air show 2012 a Londra. 9-15 July 201
Design Review of Train Concepts in Virtual Reality
No full textThe paper deals with the application of a Virtual Reality (VR) system to the Design Review session of a new train service system. The virtual environment has been provided with particular features, ad hoc implemented for Design Review activity, in particular directed to railway field concepts. Generally, the design activity in railway field is carried out by CAD systems, in the typical desktop configurations. Even if this approach is a good step forward if compared to the traditional project design, it does not provide an exhaustive view of all the design process phases. The well-known benefits of VR techniques include the possibility to substitute the physical mock-up of a product concept with the models obtained by means of virtual prototyping. Moreover, simulation is not limited to the simple visualization, but it gives the designer the possibility to have an immersive experience, “living” the product before its physical realization. Virtual prototyping allows validating much more alternatives not only of a product, but also of processes. The main goal of the implemented system was to offer an instrument suitable even for inexperienced VR users, such as designers or workers assigned to the maintenance operations. Moreover, unlike the available tools for Design Review, the environment was oriented to the study of complex systems with large dimensions, such as trains in real scale. The possibility to involve a great number of persons, not only designer but also personnel assigned to the real maintenance, makes them to share the experience with staff of other company sectors, according to a concurrent engineering approach. The authors received the suggestions by the collaboration with designers and technicians of an important railway company, so the case study demonstrated the utility of the presented approach in a field prevalently characterized by a traditional way of design. Particularly, the simulation concerned the brake and the air-conditioning systems was finalized to satisfy the required verifications of accessibility and detachability of such sub-assemblies with the usual tools, which the company maintenance shops are equipped with. The design review system realized by the authors is based on a commercial software, chosen as simulation manager, but several additional features has been added using the available Application Programming Interface in order to satisfy specific railway design requirements. The activity has been carried out at the VR laboratory of the Competence Centre for the Qualification of Transportation Systems, founded by Campania Region and named “VRTest”
Design Review of Train Concepts in Virtual Reality
No full textThe paper deals with the application of a Virtual Reality (VR) system to the Design Review session of a new train service system. The virtual environment has been provided with particular features, ad hoc implemented for Design Review activity, in particular directed to railway field concepts. Generally, the design activity in railway field is carried out by CAD systems, in the typical desktop configurations. Even if this approach is a good step forward if compared to the traditional project design, it does not provide an exhaustive view of all the design process phases. The well-known benefits of VR techniques include the possibility to substitute the physical mock-up of a product concept with the models obtained by means of virtual prototyping. Moreover, simulation is not limited to the simple visualization, but it gives the designer the possibility to have an immersive experience, “living” the product before its physical realization. Virtual prototyping allows validating much more alternatives not only of a product, but also of processes. The main goal of the implemented system was to offer an instrument suitable even for inexperienced VR users, such as designers or workers assigned to the maintenance operations. Moreover, unlike the available tools for Design Review, the environment was oriented to the study of complex systems with large dimensions, such as trains in real scale. The possibility to involve a great number of persons, not only designer but also personnel assigned to the real maintenance, makes them to share the experience with staff of other company sectors, according to a concurrent engineering approach. The authors received the suggestions by the collaboration with designers and technicians of an important railway company, so the case study demonstrated the utility of the presented approach in a field prevalently characterized by a traditional way of design. Particularly, the simulation concerned the brake and the air-conditioning systems was finalized to satisfy the required verifications of accessibility and detachability of such sub-assemblies with the usual tools, which the company maintenance shops are equipped with. The design review system realized by the authors is based on a commercial software, chosen as simulation manager, but several additional features has been added using the available Application Programming Interface in order to satisfy specific railway design requirements. The activity has been carried out at the VR laboratory of the Competence Centre for the Qualification of Transportation Systems, founded by Campania Region and named “VRTest”
Virtual reality tools and methods for the improvement of ergonomics and safety in manufacturing systems
No full textErgonomics and Safety are more and more recognised as crucial aspects in the design of manufacturing systems. Indeed, it is understood that digital humans simulations can be very useful to evaluate the Workplace Health and Safety. Moreover, reliability and safety are of great importance when human beings and robots need to share their workspaces to collaboratively perform a specific task. The tutorial will be focused on virtual reality tools and methods, whose application in the design of manufacturing processes can improve the human condition in a factory.
Through the use of appropriate industrial case studies, ergonomics and safety issues concerning to manual workcells and Human-Robot hybrid workcells will be illustrated. Furthermore, innovative Virtual Design Review systems will be presented in which product designers and production engineers can cooperate also remotely in order to share their expertise and evaluate critical situations in an assembly line, since the first phases of the product development process
From virtual reality to web-based multimedia maintenance manuals
No full textThis paper focuses on a structured methodology that uses virtual reality (VR) and digital human modeling (DHM) to study maintenance procedures of industrial products. VR technologies help to highlight the most critical aspects of maintenance operations, while DHM tools allow detailing working sequences. Data coming from these analyses are then used to draw up a multimedia maintenance manual based on digital video animations, audio comments, explanatory images and written recommendations. Information is available to maintenance personnel directly on the working site through portable electronic devices. Further, web-based multimedia manuals can be updated on-line and help to shorten learning time and maintenance downtimes
Innovative assembly process for modular train and feasibility analysis in virtual environment
No full textThe present paper deals with the manufacturing process of a railway carriage. In the first part of the paper, the authors focus on a “virtual railway factory” that uses a very innovative assembly cycle, if compared to the traditional manufacturing processes in the railway field. The case study refers to a railway carriage consisting of four modules, that are singularly set up of furnishings and other systems in dedicated workplaces. On one hand, the virtual simulation has highlighted several critical aspects to be improved, in order to achieve a greater feasibility and to reduce time and cost. On the other hand, the designers have been able to evaluate themovements of the parts and the assembly sequences of the components, by considering each geometric, functional and technological constraint and also some safety requirements. The second part of the paper deals with the simulation of the assembling operations and the analysis of tolerance chains, which have been performed through aComputer AidedTolerancing system. In particular, the precision requirements have been also evaluated and we have compared the accumulation of dimensional and geometric deviations when using both rivets and traditional welds to fasten the modules
From Virtual Reality to web-based multimedia manuals: a case study on the maintenance of a piping system
No full textThis paper focuses on a structured methodology that uses VR and DHM to define and study maintenance operations. VDR help to highlight the most critical aspects of maintenance operations, while DHM tools allow detailing the working procedures. The information coming from these analyses are then used to draw up a multimedia maintenance manual based on digital video animations, audio comments and textual indications. The digital medium can be used by maintenance personnel directly on working site through portable electronic devices. Further, multimedia manuals can be updated online and help to shorten learning time and maintenance downtimes
Comparative morpho-physiological analysis between Ciona robusta and Ciona savignyi
No full textThe seasquirt Ciona robusta and its co-generic Ciona savignyi, are two long-divergent species, sharing the same
habitat and competing for the same spaces and resources. Their very similar morphology has been responsible
for the misidentification of the two organisms, and, consequently, for the underestimation of their geographic
distributions and new areas of co-occurrence. In spite of the large amount of knowledge built up by developmen-
tal biologists, few data are available regarding the morpho-physiology of the two sea squirts. The comparison of
morphological and physiological features carried out in the present study (i.e. length-body weight correlation,
tunic/organ ratio, tissue-specific retained water and metabolic rate), highlighted slight, but significant, differ-
ences strongly supporting the hypothesis of different ecological strategies for the two species. More precisely,
C. savignyi invests more energy in growing faster and taller, likely to improve the quality and concentration of
the filtered food, and sustains a faster metabolic/growth rate. Conversely, C. robusta invests more into tunic thick-
ness, reducing the risk of predation, even if this likely means a slower metabolic/growth rate. In addition it was
noted that in both species, the tunic absorbs more water than the other tissues, a peculiarity that may allow them
to better counteract sudden fluctuations in environmental salinity
Human Robot Interaction in Virtual Reality
No full textIn this paper, we describe a framework which helps designers visualize and verify the results of robotic work cell simulation in a Virtual Environment (VE). The system aims at significantly reducing production costs and error sources during manufacturing processes. The means to achieve these goals are the development of a prototypical VE for the support of robots planning tasks, reuse of animation events, and the implementation of customization tools for animation elements and their behavior. By using advanced Virtual Reality (VR) techniques, the system is also able to direct the focus of the observer to interesting events, objects and time-frames during robotic simulations in order to highlight the Human Robot Interaction within the manufacturing systems
Virtual Reality in the Management of Town Planning Design
No full textThe present paper deals with the use of Virtual Reality (VR) techniques supporting the management of urban planning design. The three-dimensional stereoscopic visualization by means of large displays shows its important benefits since the first phases of design: giving a 3D shape to an idea is an effective instrument, both for the designers to promote a solution and for the customers to make suggestions and to choice among different projects proposals, before the final one is approved. In this way, the analysis of a project becomes completely different from evaluating the traditional 2D drawings: by means of the immersive virtual reality techniques, the customer can "walk inside the project", choosing its own paths and comparing different design solutions in real time. The case study has concerned an outdoor sports area that will be located in a former industrial site in Bagnoli, next to Naples city center. The researchers of University of Naples Federico II have made a virtual reconstruction of the entire area for BagnoliFutura SpA company, which is the main contractor for the transformation of the industrial site. The use of the VR techniques has allowed the zoning commission to extensively evaluate the different project proposals and has improved the presentation of the project to the press and the general public
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