Power Balance Solver Enhanced by an Experimental Absorption Cross-Section Database

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: 80NSSC19C0557
Agency Tracking Number: 193243
Amount: $124,947.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: T5
Solicitation Number: STTR_19_P1
Timeline
Solicitation Year: 2019
Award Year: 2019
Award Start Date (Proposal Award Date): 2019-08-19
Award End Date (Contract End Date): 2020-09-18
Small Business Information
7655 W. Mississippi Ave., Suite 300, Lakewood, CO, 80226-4332
DUNS: 094141579
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Timothy McDonald
 tm2008
 (720) 974-1217
 tim@ema3d.com
Business Contact
 Helen Roberson
Phone: (228) 813-6680
Email: helen.m.roberson@nasa.gov
Research Institution
 Wichita State University
 1845 N. Fairmount
Wichita, KS, 00000-0000
 Federally funded R&D center (FFRDC)
Abstract
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 10rsquo;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 enclosurersquo;s walls and seams will be characterized via measurements and provided in a database accessible through the software toolrsquo;s GUI.nbsp;Such an enhanced PwB solver couldnbsp;tackle virtually any practical cavity problem, within the applicability boundaries of the PwB method.

* Information listed above is at the time of submission. *

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