NASA STTR 2019-II Solicitation

Proposal Summary

Proposal Information

Proposal Number:
19-2- T5.02-3311
Phase 1 Contract #:
Subtopic Title:
Electric field mapping and prediction methods within spacecraft enclosures
Proposal Title:
Stochastic Cable Harness Coupling to Electric Fields in Spacecraft Cavities
SoneLite, Inc.
2311 Via Aprilia
Del Mar CA  92014 - 3708
Phone: (619) 977-4048
Oklahoma State University-Main Campus
201 ATRC
OK  74078 - 6007
Phone: (405) 744-5699

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

Paul Bremner
2311 Via Aprilia Del Mar, CA 92014 - 3708
(619) 977-4048

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

Paul Bremner
2311 Via Aprilia Del Mar, CA 92014 - 3708
(619) 977-4048
Estimated Technology Readiness Level (TRL) :
Begin: 4
End: 8
Technical Abstract (Limit 2000 characters, approximately 200 words)

The proposed innovation is a new software tool that overcomes the present obstacles to simulation-based tailoring of EMC environment specifications for all space flight electronics. 

NASA’s baseline EMC qualification process is for all electronics systems, subsystems and components to be test-qualified to a single, universal MIL-STD-461 specification. However, this is not necessarily a safe or cost-effective process. The MIL STD may underestimate some known threats specific to a NASA mission. Successive revisions to MIL-STD-461 have increased radiation susceptibility levels by more than 40dB to accommodate the rapidly evolving EMC threats from ever-higher frequency digital electronics. But this in turn means that the MIL STD may substantially overstate the maximum expected environment for other NASA missions, precluding the use of lower cost, commercial-of-the-shelf (COTS) electronics.

The proposed innovation uses asymptotic statistics to greatly reduce the simulation task complexity, making it feasible for NASA engineers to predict and mitigate cable harness currents induced by coupling with strong cavity electric fields for all spacecraft and launch vehicle programs. Phase II will deliver a customization of RobustPhysics’ hybrid electromagnetic field modelling software for NASA electromagnetic compatibility (EMC) applications. The hybrid solution uses rigorous physics to couple a statistical model of the 3D electric field in cavities with a deterministic transmission line / transfer matrix model of currents in a cable harness.  The reduced order, statistical power balance model for 3D electric fields in complex connected cavities – including launch vehicle fairings - was validated in the Phase I STTR.

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

The new simulation tool has application to all NASA spacecraft designed to withstand EMC environment threats such as unwanted wireless and radar transmitters, on-board electronics aggressors, electrostatic discharge (ESD), lightning and high intensity radio frequency (HIRF) threats. EMC specialists at Marshall Space Flight Center confirmed application to launch vehicle avionics and possibly more immediate application to critical cable harnesses in the complex enclosed electromagnetic fields within the International Space Station modules.

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

Non-NASA applications include commercial and military aircraft, as well as EMC engineering for Navy ship, submarine, UUV and torpedo systems. There are equally clear applications in large markets outside aerospace-defense, the most significant being automotive and consumer electronics.

Duration: 24

Form Generated on 06/27/2021 15:52:04