NASA STTR 2019-I Solicitation

Proposal Summary

 19-1- T5.02-3243
 Electric field mapping and prediction methods within spacecraft enclosures
 Power Balance Solver Enhanced by an Experimental Absorption Cross-Section Database
Name:  Electro Magnetic Applications
Name:  Wichita State University
Street:  7655 West Mississippi Avenue, Suite 300
Street:  1845 Fairmount
City:  Lakewood
City:  Wichita
State/Zip:  CO 80226-4332
State/Zip:  SC 67260-0093
PHONE:  (303) 980-0070
PHONE:  (316) 978-5783

Principal Investigator (Name, E-mail, Mail Address, City/State/Zip, Phone)

Dr. Timothy McDonald
7655 W. Mississippi Ave., Suite 300 Lakewood, CO 80226 - 4332
(720) 974-1217

Business Official (Name, E-mail, Mail Address, City/State/Zip, Phone)

Matthew Miller
916 North State St Monticello, IL 61856 - 1148
(217) 840-1382
Estimated Technology Readiness Level (TRL) :
Begin: 3
End: 8
Technical Abstract (Limit 2000 characters, approximately 200 words)

We propose the development of a user-friendly software tool for estimating the electric field distributions within spacecraft enclosures based on the Power Balance (PwB) method and enhanced by a database of experimentally determined Absorption Cross-Sections (ACS) of common equipment, components and cables.

The software will be built around an already developed PwB solver that determines the statistical properties of fields for an arbitrary enclosure or multiple adjoined enclosures filled with a variety of objects and containing multiple apertures of varying dimension. The effectiveness of the PwB solver will be augmented by a user-friendly GUI that allows users to interactively define cavities through point and click operations in an already commercially successful product. The cavities can either be canonical in nature or based upon high fidelity CAD models of the spacecraft enclosures. A critical aspect of accurately predicting the statistical distribution of electric fields in a cavity is how the cavities are loaded with lossy structures. Without properly accounting for such lossy structures, results from simple PwB approaches can be off by 10’s of dB. Unfortunately, the Absorption Cross-Sections (ACS) of common components found in aerospace platforms are not readily available to analysts. As part of the proposed effort, the ACS of items commonly found in spacecraft enclosures (electronic boards, cables, avionics equipment), as well as the properties of the enclosure’s walls and seams will be characterized via measurements and provided in a database accessible through the software tool’s GUI. Such an enhanced PwB solver could tackle virtually any practical cavity problem, within the applicability boundaries of the PwB method.

Potential NASA Applications (Limit 1500 characters, approximately 150 words)

NASA has requirements for electric fields due to both external and internal sources. The proposed PwB tool supplemented with measured ACS data would allow NASA to quickly and accurately predict field distributions in loaded cavities to assess potential problems early in the design cycle. The tool would also allow NASA to consider different mitigation strategies when problems were identified in the simulations. The proposed PwB tool would greatly reduce the amount of testing required and result in major cost savings for NASA.

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words)

While specific requirements may vary between applications, the rest of the aerospace community faces similar challenges that were identified in the solicitation for this topic. Analysts need reliable and fast simulation tools that can be used early in the design cycle for their aerospace platform to predict field distributions in loaded cavities in order to achieve air worthiness certifications. 

Duration: 13

Form Generated on 06/16/2019 22:58:17