Integration of on-board systems preliminary design discipline within a collaborative 3rd generation MDO framework

The integration of the on-board systems design discipline in a collaborative Multidisciplinary Design and Optimization (MDO) framework is presented in this paper. The collaborative MDO framework developed within the context of the EU funded H2020 AGILE project is selected as reference. The technologies developed or made available in the context of the AGILE project are employed for the integration within the MDO framework of ASTRID, an on-board systems design tool owned by Politecnico di Torino. The connection of the tool with a common namespace (i.e. CPACS) and its implementation within two Process Integration and Design Optimization (PIDO) environments are described. An application study is eventually presented, showing the benefits and the potentialities of the integration of the on-board systems design discipline within a collaborative MDO framework

Integration of on-board Systems preliminary design discipline within a collaborative 3rd Generation MDO framework

The integration of the on-board systems design discipline in a collaborative Multidisciplinary Design and Optimization (MDO) framework is presented in this paper. The collaborative MDO framework developed within the context of the EU funded H2020 AGILE project is selected as reference. The technologies developed or made available in the context of the AGILE project are employed for the integration within the MDO framework of ASTRID, an on-board Systems design tool owned by Politecnico di Torino. The connection of the tool with a common namespace (i.e. CPACS) and its implementation within two Process Integration and Design Optimization (PIDO) environments are described. An application study is eventually presented, showing the benefits and the potentialities of the integration of the on-board systems design discipline within a collaborative MDO framework

A multidisciplinary approach to estimating wolf population size for long-term conservation

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Preliminary Study on OBS Electrification Efficiency for Advanced Supersonic Business and Medium Jet with Unified Engines

The present paper would investigate the effect of on-board systems masses and power required on propulsion system and aircraft mission performance of two reference supersonic aircraft. The on-board systems are even more investigated since their importance in engine and aircraft performance optimization and their effect can be only quantified through a multidisciplinary design. Moreover, with the introduction of more and all electric concepts for on-board systems, more flexibility in their design is now possible considering different architectures. In particular, the analysis involves a supersonic business jet and a supersonic medium jet with different performance, passengers number and propulsion system. The analysis shows different behaviours on the propulsion system parameters with power offtakes and systems mass variations for the two aircraft. The results are interesting for future systems architecture selection and to understand the effect of their integration to the propulsion system

Method for Estimation of Electrical Wiring Interconnection Systems in Preliminary Aircraft Design

The aim of this paper is to present an original methodology for Electrical Wiring Interconnection System (EWIS) mass estimation at an early stage of aircraft design. More than 100 km of EWIS are installed on a modern civil aircraft with a mass of several tons. The aircraft manufacturers are increasing the primary generation voltage to reduce the system mass. The proposed algorithms are sensitive to the prominent EWIS design parameters such as voltage level, cable material, system architecture (distributed or centralized) and electrification degree of aircraft on-board systems. The equations assess the impact of these parameters on the EWIS mass, which is a useful feature during trade-off analysis in aircraft conceptual and preliminary design. The methodology and the necessary data to define the algorithms are reported together with a case study to validate the equations presented

Elaboration of hydrophobic flax fibers through fluorine plasma treatment

International audienceIn this study, the goal was to compatibilize flax natural fibers (which are inherently polar) with mostly dispersive polymers, while proposing a way to recover greenhouse gases or refrigerants such as CF4 or C2F5H. Such gases exhibit a high global warming potentials (GWPs) and their recovery at the end of their lifecycle is difficult. Therefore, these two representative problematic gases were used as plasma precursor to graft fluorine atoms onto the flax fiber surface. Chemical investigation (FT-IR, 19F NMR and XPS spectroscopies), demonstrates the covalent grafting of fluorine atoms at the fiber surface, that opens the route of tailoring the surface chemistry of flax fibers. These modifications induced a decrease of the fiber polarity, which allows the treated fibers to become perfectly compatible with mostly dispersive polymer. Moreover, both mechanical properties and fluorine release during fibers combustion were investigated and any negative impact was evidenced. Therefore, thanks to the plasma fluorination, the gap between the surface energies of the fibers and mostly dispersive polymer matrix was reduced improving the wettability of the fibers through an eco-friendly way. This phenomenon promising an improvement in the mechanical performance of eco-composites reinforced with these fluorinated fibers