Analytical and Experimental Validation of the Lightning Transient Analysis Technique
Final rept. Mar-Nov 1977
TECHNOLOGY INC DAYTON OH INSTRUMENTS AND CONTROLS DIV
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A research program was undertaken to analyze and experimentally validate the Lightning Transient Analysis LTA technique using Lightning Simulation Test LST data. Using linear systems theory, the LST has been shown to be a linear combination of three transfer functions. These transfer functions were derived and shown to be valid. Specifically, the linear transform of the output pulse S sub LST Omega was shown to be the product of linear transfer functions of the LST configuration G sub LST Omega, an aperture coupling term G sub ap Omega and the aircraft wiringmeasurement equipment G sub ac Omega. Recommendations are made to perform analytical and experimental studies to quantify configuration effects small aperture spatial electromagnetic fields and shielding effects the pulse response of a wide range of aircraft circuits the complete nature of aperture coupling, including identification of the dominant and secondary apertures the effects of possibly distributed versus local excitation points and methods of extending the technique to other aircraft cabling parameters e.g., terminating impedances, non-linear devices and cable lengths and to shielded cabling. The amplitude scaling technique should be incorporated into existing routines at the AFFDL electromagnetic Hazards Group data acquisition and processing system.
- Test Facilities, Equipment and Methods
- Radiofrequency Wave Propagation