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External EMC simulation for radio electric systems, in the close environment of the aircraft (SIRENA)

Final Report Summary - SIRENA (External EMC simulation for radio electric systems, in the close environment of the aircraft)

The SIRENA project addressed the Strategic Research Area 'Strengthening the aeronautical Industry competitiveness' in the domains of action 'New aircraft concepts and aircraft environment'. Their overall objectives were to assess the influence of electromagnetic (EM) signals on the airport/aircraft and to recommend for equipment location and protection.

SIRENA's first objective is to evaluate accurately the impact of the EM environment on the aircraft, the airport field and buildings, and close to the airport. The correlated second objective is to address safety and security issues in order to recommend for immune emitters and give advice for the EM airport environment.

In order to achieve the general objectives, the research focus on intermediate scientific and objectives:
-Obj1: to get airfields mock up as close as possible to reality;
-Obj2: to get EM source mock up as close as possible to reality;
-Obj3: to get EM field value as close as possible to reality;
-Obj4: to have EM fields interpretation as simple as possible;
-Obj5: to set up recommendation and advice.

Technological objectives included the following:
-1. to set up a methodology and a modelling tool for airports (generic and dedicated);
-2. to set up a methodology and a module for far and near field EM diagram computation;
-3. to set up a methodology and a computation kernel to compute EM field;
-4. to set up a comprehensive visualisation of the computed EM field.

The project's main achievement were as follows.:
-1. Mastering fast methods for:
-airfields 3D modelling to achieve a virtual geometrical mock up.
-enhancement of the virtual geometrical mock up with EM physical data to achieve a virtual physical/geometrical mock up.
-fast means: one airport virtual mock up achieved within one month;
-2. Accurate processing far and near field EM diagram to characterise EM sources. Accurate means: 20 percent max deviation between model and measured reality.
-3. To acquire an efficient and accurate method to assess the EM energy paths within the 3D scenes from sources to receptors (airfield and airplane) in order to quantify the level of received EM field.
Efficient means: low sensitivity to scene complexity (hundreds of thousands of polygons) and low sensitivity to the amount of reception points (tens of thousands of points). On standard PC based platform, the aim is about 1 hour long for 100 000 polygons and 10 000 points. Accurate means: 5 dB max deviation between model and measured reality.
-4. Setting up of an interactive EM fields visualisation enabling a global EM phenomena understanding in the scope of recommendations for standardisation.
Interactive means: capability to move in real time (25 Hz) a probe enabling to analyse the EM field value at any location of the scene.
-5. Providing aircraft/equipment manufacturer with a solution to characterise the ambient EM field (input for accurate modelling of equipment behaviour visà- vis EM).
-6. Assessment of the limits of EM interferences from the exploitation of the generic parametric simulation.
-7. Recommendations for immune emitters and advice on EM impact on the airport and in the vicinity of the airport.

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