Accession Number : ADA112626

Title :   Assessment of Lightning Simulation Test Techniques. Part I.

Descriptive Note : Final rept. (Part 1), Jul 80-Oct 81,

Corporate Author : MCDONNELL AIRCRAFT CO ST LOUIS MO

Personal Author(s) : Butters,W G ; Clifford,D W ; Murphy,K P ; Zeisel,K S

PDF Url : ADA112626

Report Date : Oct 1981

Pagination or Media Count : 128

Abstract : The program objective was to assess the current pulse and shock-excitation lightning simulation test techniques. The current pulse test technique applies a pulsed current stimulus to the test article, while the shock-excitation technique first charges the test article to a high voltage which then produces a rapid voltage/current pulse on the test article as the spark gap (between the test article and the return conductors) breaks down. Direct comparisons of the induced voltage response on interior circuits were made for the two test techniques. The interior circuits were high-impedance differential wire pairs typical of many flight-critical in advanced aircraft. The program was divided into three tasks: 1) an analytical task to model both test techniques to provide a theoretical base, 2) comparative tests using an aluminum cylinder and simple interior circuits that were readily modeled, and 3) comparative tests on the flight control circuits of a full-scale YF-16 fighter aircraft. The cylinder test configuration was modeled as two coupled transmission line circuits. The generator, cylinder, return lines, and the output configuration between the cylinder and the return line comprise the primary tranmission line that interacts with an interior circuit transmission line via aperture coupling.

Descriptors :   *Simulation, *Lightning, *Jet fighters, High voltage, Test methods, Stimuli, Spark gaps, Pulses, Internal, Circuits, Voltage, Currents, Response

Subject Categories : Attack and Fighter Aircraft
      Atmospheric Physics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE