PROJECT TITLE :

HIRF Transfer Function Observations: Notes on Results Versus Requirements and Certification Approach

ABSTRACT:

HIRF transfer functions results are rarely obtainable to the public. Usually, the information provided in applicable guidance material are used for estimation of internal HIRF atmosphere in an air vehicle. An exemplary set of HIRF transfer functions for a small aircraft is presented here. Results for the aircraft (10.four-m wingspan and eight.three m of length) are compared regarding state of the art approaches applied for aircraft HIRF certification campaigns. This is completed in applicable frequency ranges and by the employment of applicable test methods with regard to needs in place. For all major types of latest test ways, results are generated by measurement and numerical computer modeling. Principles of outcomes are mentioned and compared to current follow in place. This concerns the shapes of the transfer functions on one hand and also the order of magnitudes of obtained levels on the other hand. The obtained results show vital deviations from generic transfer functions currently applied in aircraft industry. The coupling to the interior of the aircraft observed here was above indicated by the applicable generic transfer functions. Numerical laptop modeling is used here to verify the obtained outcomes by principle.