Charles Jullien's Lab

About the lab

Safran Electrical & Power - DTI

Featured projects (1)

In the context of Electric Wiring Interconnection System (EWIS), the installation directives and specifications are generally provided by airframers to suppliers. They comply with recent certification specification and implicitly guarantee the reliability of the system. These specifications are coming from a long term experience in aeronautical industry. However, the applied good practice design and installation rules suffer from fast technological evolution in aeronautical industry (lightweight composite materials, generalization of electrification of functions on board aircraft, etc.) and industry evolution itself (development cycle, productivity, reduction of the number of physical prototypes, etc.). These rules concern the allocation of cables in bundles (segregation in routes depending on criticity of electrical functions), the relative geometry of routes of bundles (spacing and height between routes...), the size of bundles, the cable function and loads. Those rules depend on the airframer and generally on the aircraft. Controlling EWIS reliability in today aeronautical industry cannot be managed by good practice rules only. Aircraft industry needs reliable Tools and Methods for managing the wiring complexity of the wiring installed in new generation of aircraft. In this context, the ANALYST’s objective is double. In the first hand ANALYST aims at developing and validating electromagnetic (EM) numerical Tools and Methods for optimizing a very important installation concern: the minimum distance between bundles. This distance must guarantee the absence of EM susceptibility for an acceptable set of bundle parameters (constitution and geometry, crossing angle...). From a mathematical perspective, the distance must be determined with the highest possible level of confidence.. On the other hand, in some particular configurations, the minimum distance is not achievable because of the limited room available. It is then mandatory to derogate to this absolute parameter. ANALYST aims at evaluating the level of confidence associated with this derogated distance. The minimum distance rule must be numerically evaluated on a generic configuration. In both situations, absolute and derogated, the minimum distance will be determined on a simple configuration of two straight bundles having the same length. Then the robustness of this rule will be evaluated on complex and realistic cable-bundles. This project has received funding from the Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 821128

Featured research (1)

Experiments and demonstrations (E&Ds) have always been a very special part of the EMC and Signal Integrity/Power Integrity (EMC+SIPI) symposia - and for a good reason. Within the broad range of technical presentations, workshops and tutorials, practical demonstrations deliver the unique opportunity to experience the variety of hands-on hardware and software applications, performed by EMC experts right there, right then. Witnessing the actual execution of an experiment from the first row provides a different type of learning quality expanding its fundamental understanding, teaching new tricks or solutions, or even for the sake of inspiration - after all, who doesn't enjoy seeing their favorite EMC concept being implemented in action?

Lab head

Charles Jullien
  • R&T Department

Members (3)

Jerome Genoulaz
  • Safran Electrical & Power
M. Dunand
  • Labinal Power Systems, Safran group
Anca-Lucia Goleanu Dieudonne
  • EWISE Division, Safran Electrical and Power, Blagnac, France