Automatic Fusion of Fidelity sources ofAerodynamic Data : Simulating Aircraft Stability And Control Characteristics for Use in Conceptual Design

Abstract: CFD use has increased signi cantly in airplane conception, and the industry demands more andmore precise and reliable tools. This was the goal of the SimSAC project. The result is CEASIOM,a computerized environment made of several modules for the design and prediction of the aircraft'scharacteristics. It constructs aerodynamic tables used in the prediction of the characteristics of anaircraft. In simple ight conditions, simple computation methods are used, whereas in complex ightconditions,involving turbulences, more advanced methods are used. This reduces the computationalcost, but the tables resulting from di erent delity sources must be fused to obtain a coherent tablecovering the whole ight envelope.The goal of this project was to realize the fusion. Additionally, a lter and a custom-made mapping toenhance the accuracy of the results from the fusion were required. The addition of helpful visualizationtools was suggested. The whole should be integrated in the CEASIOM interface as a Fusion module.For this, 6 functions were coded. The rst one loads the data sets. The second, myplot, allows theengineer by plotting the data in a coherent way, to spot any big mistakes or incompatibility in thedata sets. The third, myvisual, displays the elements spotted as outliers or potentially out of pattern.This is used by the next function, my ltermap, to lter out the erroneous data. This function alsorealizes the custom-made mapping.The fth function, myfusion, fuses the data and saves it in a .xmlCEASIOM formatted structure to be used by the next CEASIOM module. The sixth function ltersout, in the same way as my ltermap, the outliers from the fused data, and saves the ltered fused dataset in a .xml CEASIOM formatted structure. Finally, a Matlab GUI was implemented and integratedinto the main CEASIOM interface.The module works perfectly, except for the mapping part, that needs a few readjustments.