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Contact of the walls of a tank with the liquid it is being filled with creates an electrical double layer of charge at the interface between the two materials, independently of their respective nature. On the liquid side, movement of this layer of electrical charge by the filling or draining of the tank induces a streaming current, which provides useful information concerning the intrinsic flow electrification...
Static charging of an aircraft surface can lead to electromagnetic disturbances on aircraft radio and avionic systems. This phenomenon is called Precipitation Static. Arc discharges are the main causes, and they often occur when there is a bonding defect on the surface of the aircraft. In order to find these bonding defects, in most cases the whole aircraft has to be scanned. This paper presents a...
Wireless networks are widely used in urban or office environments and are increasingly considered as an attractive solution for various aeronautic applications. Current investigations focus in particular on RFID technologies because of their widespread use, low cost and ease of installation. The objective of this publication is to propose a concept of RFID equivalent model to predict functional and...
Static charging of an aircraft surface can lead to electromagnetic disturbances on aircraft radio and avionic systems. This phenomenon is called Precipitation Static. Arc discharges are the main causes, and they often occur when there is a bonding defect on the surface of the aircraft. This paper presents a method that aims at reducing the time needed for the search of outer bonding issues. The system...
We present in this paper the use and validation of a BEM / MoM fast direct approach based on H-matrix to predict RCS, impulse response and ISAR image of representative targets. Numerical results are then compared to dedicated measurements in anechoic chamber.
The contact of a tank with the liquid with which it is being filled creates an electrical double layer at the interface between the two materials. On the liquid side, the movement of this electrical charge by the filling or the draining of the tank induces a streaming current which is an image of the intrinsic flow electrification phenomenon occurring at the walls of the tank. Indeed, the flow of...
Wireless networks are widely used in urban or office environments and are increasingly considered as an attractive solution for various aeronautic applications. Current investigations focus in particular on RFID technologies because of their widespread use, low cost and ease of installation. The question of the optimal positioning of transmitters and receivers checking all industrial constraints arises...
A long term objective for aircraft manufacturer is the complete integration of antennas in fuselage in order to reduce the aerodynamic drag of aeronautic platforms. Performances of typical BEM/MLFMM solvers may be affected by local mesh refinements needed to connect conformal antenna models on aircraft. BEM fast direct solvers based on H-matrix are a promising solution to overcome these difficulties...
A long term objective for aircraft manufacturer is the complete integration of antennas in fuselage in order to reduce the aerodynamic drag of aeronautic platforms. We propose in this paper a modelling strategy for dealing with conformal antenna coupling on aircraft at several GHz.
The results described in this paper form part of ILDAS-2 project launched by Airbus, with Airbus Group Innovations and NLR, as a follow-up to ILDAS-1 FP6 EU project. The goal of the programme is to develop an operational system for aircraft in-flight lightning strike diagnoses in terms of current waveform reconstruction and attachment points identification. Onboard hardware manages lightning detection...
Aerospace applications are particularly challenging for wireless networks. Not only are the constraints on emitted power very stringent but the network must display a guaranteed reliability. We also encounter a rather unfavourable propagation environment, in the form of highly resonant cavities (e.g. baggage holds) and complex mobile environments (e.g. the cabin). There is a further constraint that...
Wireless networks are widely used in urban or office environments and could become in the future an interesting solution for various aeronautic applications. Their development will necessarily induce channel model investigations to allow a link between propagation and system aspects. The objective of this paper is to present the channel model characterization by simulation of a complex avionic environment;...
This document presents the test method settled and applied for A380 lightning and low frequency HIRF transfer functions determination, deals with method evolutions necessary for composite aircrafts and is completed by in-flight lightning measurements system now available thanks to ILDAS project and its future application to A380.
Assemblies representative of aircraft junctions made of two materials and a fastener have been subjected to lightning current waveforms in laboratory. Current distributions on the different parts of the assemblies have been measured. An electrical equivalent circuit of the assemblies has been built. An inverse method has been designed to extract the dynamical in-strike electrical parameters (resistances,...
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