1,720,987 research outputs found
Special issue on ‘transdisciplinary approaches to digital manufacturing for industry 4.0’
Full text linkThe concept of Industry 4.0 (I4.0) outlines the vision of a smart factory characterised by the complete networking of all production parts and processes, consisting of real-time control via cyber-physical systems, increased use of robots, intelligent and adaptable production systems, which should contribute to greater productivity through resource efficiency. The convergence of production and interaction, work and communication requires increasingly transdisciplinary competencies for creating a smart factory, which is economically successful and competitive. These competencies consist, among others, of divers expert knowledge, flexibility, and creativity for moving toward I4.0
Design and Development of a Transition Propulsion System for Bimodal Unmanned Vehicles
No full textAn impulsive thruster propulsion system that could be used in a multi-modal UAV capable of sustained aerial flight, locomotion in water and deployment from a tube filled with compressed air is under development. This paper covers the design and optimisation process of the propulsive system, as well as its modelling with analytical and CFD simulations to predict the performances. The system is designed to fulfil vehicle mission requirements in terms of altitude and velocity after water/air transition. The thruster uses a common CO2cartridge available off-the-shelf to accelerate water stored inside a water chamber along with an inflator to activate and regulate the mechanism remotely for efficient and sustained thrust. Water is chosen as vectorial fluid since it is available from the surroundings. Water chamber sizing process uses an analytical model calibration through CFD approach to refine an analytical model and predict propulsion performances. After thruster sizing, an experimental prototype was fabricated and tested for model validation. A comparison and discussion of the results as future work is also proposed with areas for improvement and development
Maintenance in aeronautics in an Industry 4.0 context: The role of Augmented Reality and Additive Manufacturing
Full text linkThe paper broadly addresses how Industry 4.0 program drivers will impact maintenance in aviation.
Specifically, Industry 4.0 practices most suitable to aeronautical maintenance are selected, and a detailed
exposure is provided. Advantages and open issues are widely discussed and case studies dealing with
realistic scenarios are illustrated to support what has been proposed by authors. The attention has been
oriented towards Augmented Reality and Additive Manufacturing technologies, which can support maintenance
tasks and spare parts production, respectively. The intention is to demonstrate that Augmented
Reality and Additive Manufacturing are viable tools in aviation maintenance, and while a strong effort is
necessary to develop an appropriate regulatory framework, mandatory before the wide-spread introduction
of these technologies in the aerospace systems maintenance process, there has been a great interest
and pull from the industry sector
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Development and application of a computer-based system for conceptual aircraft design
No full textAerospace Engineerin
Sketch: A computer program for plotting a transport airplane configuration in conceptual design
No full textAerospace Engineerin
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