The Analysis and Identification of Flux-Induced Voltage Transients on Low-Loss Transmission Lines with Application to the Lightning-Transient-Analysis (LTA) Problem

One of the acknowledged lightning threats to aircraft is the induction threat in which a lightning-induced fuselage skin current inductively or capacitively flux couples through small dielectric "holes" or apertures in the fuselage onto intemal avionics cabling. In order to optimize the circuit protection, it is necessary to identify both the nature and location of the flux excitation. Using standard capacitor-bank LTA testing, this paper advances a linear-system-identification technique, based on the impulse response, that will defme both the nature and location of the dominant excitations. The technique is then successfuily applied to the identification of the Yaw Damper Circuit of the USAF F-111.