Advanced Assessment of the Risk of Underestimating EMC Conducted Tests for Satellites “in-Flight” Conditions

This proposal deals with the assessment of the statistical risk of underestimating conducted electromagnetic levels in the framework of electromagnetic compatibility (EMC) testing for “in-flight” satellites' configurations. In the following, the context of this study is briefly described. Then, the theoretical foundations are presented including: deterministic models for grounding and bonding networks, and the framework for uncertainty propagation. Indeed, noticeable differences exist between “test” and “in-flight” configurations that may lead to overestimating and/or underestimating EMC confidence margins. In this context, a particular focus is given for Monte Carlo (MC) and Stochastic Collocation (SC) methods: the use of the two techniques is illustrated through Multi-conductor Transmission Line (MTL) simulations. The MTL method allows taking into account “uncertain” grounding of an equivalent MTL system including screening and straps bonding. A final discussion is proposed with EMC recommendations.