Book 2012 des projets Systematic

DiagnosisSODDASoft Defects Diagnosis in wired networksON GOINGPROJECTCables are present in many systems and their role is fundamental, from energy supplyto information transmission. However their maintenance is often neglected and nosystem for quick and accurate diagnosis does exist. Previous projects have allowed usto propose diagnosis methods and systems for complex wired networks that have proventheir very good capabilities for hard defects, and also their limitations for soft ones.SODDA will consider soft defects diagnosis with a two-step approach: first study of thedirect problem (physical modeling for the detection of soft defects using reflectometry)and then the inverse problem (reflectogram inversion to obtain the location of defects).An industrial follow-up will guide and validate the work on real cases.CONTACTFabrice AUZANNEAUCEA LIST+33 (0)16 90 89 20 70fabrice.auzanneau@cea.frTECHNOLOGICAL OR SCIENTIFIC INNOVATIONSThe problem of cable soft defectsdiagnosis is today an open problemwhich becomes more andmore important, because harddefects (short-circuit and opencircuit) represent existing defects,meaning that their detectionis done after they appeared,and after they had consequenceson the system. A soft defect canalso be considered as the premiseof a future hard defect,which allows bringing extra information:defect forecast. The approachfollowed in the project willbe based on numerical and experimentalcharacterizations ofsoft defects signatures. To ourknowledge, this precise characterizationof soft defects doesnot exist yet. The main breakthroughsof the project relate tothe development of simulationmodules specialized in wiregeometries, the understanding ofthe signatures and the characterizationsof soft defects, thestudy of specific diagnosis methods for these defects and the study of signal processingmethods able to extract from the reflectograms the weak signatures of soft defects.PARTNERSLarge companies:SAFRAN ENGINEERINGSYSTEMS (PARTNER WITHOUTFUNDING)Research institutes, universities:ESYCOM, INRIA, LGEPSUPELECPROJECT DATACoordinator:CEA LISTCall:ANRStart date:January 2012Duration:36 monthsGlobal budget (M2):1.3Funding (M2):0.4STATUS - MAIN PROJECT OUTCOMESThe results will be released through patents, conferences, PhD theses, future industrialor co-operative projects, industrial transfer. A start-up is being created to exploit theprevious results protected by a patents portfolio. It will be the privileged customer forthe project’s results. This will enable it to integrate the upstream results of SODDA inits products and acquire a decisive technological lead, in particular with regard to theonboard diagnosis.Automotive & Transports WG49