Title :
The use of transmission line impedance measurements to determine electromagnetic comparability of FQIS wiring installations
Author :
Scearce, Stephen A. ; Dudley, Kenneth L. ; Nguyen, Truong X. ; Ely, Jay J.
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
Abstract :
Impedance measurements of a fuel quantity indication system (FQIS) were used to compare the electrical properties of a simulated FQIS installation to those of an actual installation. The fuel tank wiring and fuel probes from a Boeing 747 were removed from a retired airplane and installed in the reverberation chamber. The NASA installation was intended to electrically simulate the aircraft installation. A series of impedance measurements were taken on both installations in order to compare the input impedance values for each installation. A unique combination of statistics and the Smith Chart were used to compare the installations. This paper describes the methodology used in the data acquisition process, and the statistics of the installations are compared in the complex domain
Keywords :
aerospace simulation; avionics; electric impedance measurement; electromagnetic coupling; fuel; radiofrequency interference; wiring; Boeing 747; EM coupling; EM field threat; Smith Chart; arcing; complex domain; data acquisition methodology; electromagnetic comparability; excessive heating; fuel probes; fuel quantity indication system; fuel tank wiring; input impedance values; reverberation chamber; simulator; sparking; transmission line impedance measurements; wiring installations; Aircraft; Airplanes; Data acquisition; Fuel storage; Impedance measurement; NASA; Probes; Reverberation chamber; Statistics; Wiring;
Conference_Titel :
Digital Avionics Systems Conference, 2000. Proceedings. DASC. The 19th
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-6395-7
DOI :
10.1109/DASC.2000.886919
