Software to Support a Comprehensive Spacecraft Surface Charging Program

Spacecraft charging is a well-known problem for space vehicles. Advanced evaluation of spacecraft charging threats to a particular mission can inform design and drastically reduce the risk for space programs. We present a new tool, EMA3D-Internal, for performing a thorough evaluation of spacecraft internal charging risks. The tool can be run entirely from the graphical user interface and allows geometry import and development from within CADfix, an advanced CAE platform. The user can specify an arbitrary and realistic radiation spectrum, such as what might be obtained using the AP9/AE9 framework. In the webinar, we will demonstrate applications of EMA3D-Internal for realistic mission environments, showing the steps involved in importing and preparing the model, running the simulation and analyzing results.

EMA has developed software tools to support an advanced surface charging analysis program. Our tools are complementary to Nascap-2K – a trusted and well-known surface charging physics solver. EMA3D tools include an advanced CAE platform that allows the user to develop detailed geometry within the CADfix environment, assign materials to the model, mesh the model, and then export it directly into a Nascap-2K object ready for simulation.
These powerful tools allow the user to import native CAD to serve as the basis for their simulation model. The user can also precisely control the model mesh – varying the mesh algorithm and reso-lution to find an accurate and efficient simulation object.
The surface charging simulation results can also be parsed with EMA3D post-processing tools to create a fully 3D time animation of the charging process, and obtain detailed quantitative information on surface-to-surface differential voltages and other quantities – all broken down according to material type.