NASA Scientific and Technical Aerospace Reports - The University ...

was used to develop a multivariate function that when it is scaled using historical failure data from the emergency path lighting
system, the function estimates the failure probabilities of wires for most of the environmental and physical conditions found
on aircraft. A damage potential analysis was expanded to include a model of damage to structure that depends on the power,
energy, and heat dissipation of an electrical arc. An agreement between the developed model and damage data was acceptable.
However, potential improvements to the model have been identified. Methodologies and software tools have been developed
to improve the accuracy and efficiency of importing the required aircraft EWIS data into the tools model database. Using these
tools, 7783 wires, 1774 bundle sections, and 579 connectors were modeled and imported into the database. Finally, a prototype
report was generated to improve consistency between the reports generated by the EWIS RAT and Aircraft Certification Office
expectations. These improvements have been integrated into the EWIS RAT.
NTIS
Electric Wire; Risk Assessment; Wiring
20100017483 NASA Langley Research Center, Hampton, VA, USA
Bulk Current Injection Testing of Close Proximity Cable Current Return, 1kHz to 1 MHz
Bradley, Arthur T.; Lee, William M.; Singh, Vivek; Yavoich, Brian; April 12, 2010; 4 pp.; In English; 2010 Asia-Pacific
Symposium on Electromagnetic Compatibility, 12-16 Apr. 2010, Beijing, China; Original contains color and black and white
illustrations
Contract(s)/Grant(s): WBS 432938.11.01.07.42.03
Report No.(s): NF1676L-10049; Copyright; Avail.: CASI: A01, Hardcopy
ONLINE: http://hdl.handle.net/2060/20100017483
This paper presents the results of an experiment examining the percentage of current that returns on adjacent wires or
through a surrounding cable shield rather than through a shared conducting chassis. Simulation and measurement data are
compared from 1 kHz 1 MHz for seven common cable configurations. The phenomenon is important to understand, because
minimizing the return current path is vital in developing systems with low radiated emissions.
Author
Injection; Fabrication; Electrical Engineering; Electric Current; Coaxial Cables
20100017484 NASA Langley Research Center, Hampton, VA, USA
Comparison of Analysis, Simulation, and Measurement of Wire-to-Wire Crosstalk
Bradley, Arthur T.; Yavoich, Brian James; Hodson, Shame M.; Godley, Richard Franklin; April 12, 2010; 4 pp.; In English;
2010 Asia-Pacific Symposium on Electromagnetic Compatibility, 12-16 Apr. 2010, Beijing, China; Original contains color and
black and white illustrations
Contract(s)/Grant(s): WBS 432938.11.01.07.42.03
Report No.(s): NF1676L-10050; Copyright; Avail.: CASI: A01, Hardcopy
ONLINE: http://hdl.handle.net/2060/20100017484
In this investigation, we compare crosstalk analysis, simulation, and measurement results for electrically short
configurations. Methods include hand calculations, PSPICE simulations, Microstripes transient field solver, and empirical
measurement. In total, four representative physical configurations are examined, including a single wire over a ground plane,
a twisted pair over a ground plane, generator plus receptor wires inside a cylindrical conduit, and a single receptor wire inside
a cylindrical conduit. Part 1 addresses the first two cases, and Part 2 addresses the final two. Agreement between the analysis,
simulation, and test data is shown to be very good.
Author
Crosstalk; Electric Wire; Simulation; Electrical Engineering; Mathematical Models
20100017486 NASA Langley Research Center, Hampton, VA, USA
Comparison of Analysis, Simulation, and Measurement of Wire-to-Wire Crosstalk
Bradley, Arthur T.; Yavoich, Brian James; Hodson, Shane M.; Godley, Franklin; April 12, 2010; 4 pp.; In English; 2010
Asia-Pacific Symposium on Electromagnetic Compatibility, 12-16 Apr. 2010, Beijing, China; Original contains color and
black and white illustrations
Contract(s)/Grant(s): WBS 432938.11.01.07.42.03
Report No.(s): NF1676L-10051; Copyright; Avail.: CASI: A01, Hardcopy
ONLINE: http://hdl.handle.net/2060/20100017486
In this investigation, we compare crosstalk analysis, simulation, and measurement results for electrically short
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