Identification of Voltage Transients on Aircraft Cabling under LTA Excitation

Lightning and electro-magnetic pluse-induced fuselage skin currents can magnetically or electrically flux couple onto air-craft cabling through dielectric "holes" or apertures in the aircraft fuselage. Using lightning transient analysis (LTA) input-output waveform records, frequency domain techniques are presented that locate the exact point of excitation. The techniques are demonstrated using an RG-58 cable simulation and are then applied to the yaw damper circuit of a USAF F-111.