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Electromagnetic interference measurements methods in smart-fuselage unmanned aerial vehicles

Type of activity
Competitive project
Acronym
eSAFE_UAV
Funding entity
AGENCIA ESTATAL DE INVESTIGACION
Funding entity code
PID2019-106120RB-C31
Amount
113.500,00 €
Start date
2020-06-01
End date
2023-05-31
Abstract
Summary of the coordinated Project
Breakthrough technologies are being incorporated into the fuselages of Unmanned Aerial Vehicles (UAVs), and aircraft in general, for
making them smart. Modern fuselages have many more features beyond the specified mechanical and structural ones. A variety of
sensors are being embedded into composite fuselages for measuring strain, vibrations, and temperature. Those sensors monitor the
health of the fuselage, predicting when maintenance is required. Likewise, the inclusion of Frequency Selective Surfaces (FSS) into the
fuselage allows designing its intended electromagnetic (EM) response. Therefore, the fuselage can act as a shield, a filter or as a RF
absorber at different bands. Moreover, composite materials are increasingly being used in the aircraft industry due to their mechanical
properties and advantages in terms of the manufacturing process. Novel processes focused on accelerating the assembly time while
reducing the cost have changed the design of aircraft parts and junctions.
Such innovations affects the EM performance of aircrafts. Understanding the Electromagnetic Compatibility (EMC) behavior of smart
fuselage technologies is central for mitigating the risks of Electromagnetic Environmental Effects, therefore, allowing safer, highly reliable
and robust state-of-the-art composite UAV designs. In this regard, we must characterize the EMC behavior in elements that can,
realistically, be part of the UAV smart fuselage and that are critical for a complete EMC assessment. This includes apertures and multifunctional mechanical joints intended for streamlined assembly, as part of the composite
aircraft manufacturing process.
Hence, assessing the EMC behavior of composite UAVs having smart fuselages requires:
-To characterize the current flow through the fuselage including the influence of discontinuities and joints made through screws and rivets.
-To evaluate the shielding effectiveness of fuselages including mechanical joints and apertures employed in novel assembly technologies
for composite UAVs.
-To study technologies including FSS in terms of their EMC behavior, including the EM characterization of their constituent materials.
Achieving the objective of the project require developing new experimental and modelling techniques, including:
-Embedded planar, ultrawideband, RF probes with direct analog optic fiber link suitable for current sensing through screw and rivets
composite junctions in smart fuselages.
-Shielding effectiveness measurement methods and field probes for evaluating simultaneously the electric and magnetic field inside the
fuselage distributions.
-Testing methods for characterizing the electromagnetic behavior of frequency selective surfaces from the standpoint of EMC.
-Methods for characterizing the electromagnetic properties of materials used in smart fuselages such as new 3D printing materials.
-Numerical methods for EMC analysis and EM field simulation, comprising, macroscopic models for FSS and smart fuselages including
junctions as used in UAVs
-Stochastic methods for uncertainty analysis considering the composite material properties and the variability due to tolerances in actual
aircraft geometry, Highly accurate numerical FDTD algorithms for multiscale problems and computationally affordable, hybrid implicitexplicit
FDTD methods.
-The agreement between simulations and measurements will be performed on the DEMO-E3 demonstrator developed in this consortia
previous research projects.
Summary of subproject 1
According to the context described in the summary of the coordinated project, to evaluate the EMC behavior of composite UAVs that
incorporate smart fuselages, it is required to measure different electromagnetic quantities.
Thus, in this subproject it is necessary:
-To characterize the current flow through the fuselage including the influence of discontinuities and joints made through screws and rivets.
-To evaluate the shielding effectiveness of fuselages including mechanical joints and apertures employed in novel assembly technologies
for composite UAVs.
-To study technologies including FSS in terms of their EMC behavior, including the EM characterization of their constituent materials.
Achieving the objective of the project require developing new experimental and modelling techniques, including:
-Embedded planar, ultrawideband, RF probes with direct analog optic fiber link suitable for current sensing through screw and rivets
composite junctions in smart fuselages.
-Shielding effectiveness measurement methods and field probes for evaluating simultaneously the electric and magnetic field inside the
fuselage distributions.
-Testing methods for characterizing the electromagnetic behavior of frequency selective surfaces from the standpoint of EMC.
-Methods for characterizing the electromagnetic properties of materials used in smart fuselages such as new 3D printing materials.
Keywords
campos radiados de alta intensidad (HIRF), caracterización de materiales y discontinuidades, certificación en compatibilidad electromagnética (EMC), efectos electromagnéticos ambientales (E3), efectos indirectos de los rayos(LIE), electromagnetic compatibility (EMC) certification, electromagnetic environmental effects (E3), electromagnetic pulse (EMP), high intensity radiated fields (HIRF), innovative materials, lightning indirect effects (LIE), material and discontinuities characterization, materiales innovadores, métodos numéricos electromagnéticos, numerical electromagnetics, pulso electromagnético (EMP)
Scope
Adm. Estat
Plan
PLAN ESTATAL DE INVESTIGACIÓN CIENTÍFICA Y TÉCNICA Y DE INNOVACIÓN 2017-2020
Resoluton year
2020
Funcding program
PROGRAMA ESTATAL DE I+D+I ORIENTADA A LOS RETOS DE LA SOCIEDAD
Funding call
RETOS DE INVESTIGACIÓN: PROYECTOS DE I+D+I
Grant institution
Agencia Estatal De Investigacion

Participants