Aerospace & Defense Technology - October 2021 - 15

Software & Simulation
languages to allow users to define their problems and set various
modeling parameters that define units, dimensions, and
storage requirements, allowing the tool to synthesize a formal
system automatically. The tool can ground modeling parameters
in an intermediate representation to provide formal, comparable
reasoning between models being coupled. The tool
can then warn the user of incompatibility issues, report bugs
earlier in the design process, reduce errors, and reduce development
time. Once models pass the internal compatibility
check without error, the code is translated into efficient executable
code on one of a variety of platforms/framework combinations.
Applications
A
primary use case of these tools involves helping NASA design
next-generation aerospace platforms with increased payload capabilities
suitable for launching advanced robotic and human missions
to Mars. The payload requirements for such missions exceed
current capabilities using traditional parachutes to decelerate. One
potential solution to this problem is aerobraking with retropropulsion
to decelerate the vehicle for entry, descent, and landing.
NASA hopes to utilize modeling of the thermal protection
material and its impact from the retropropulsion system during
descent stages. This NASA application can be represented as a
multi-physics problem with multiple interacting components:
fluid flow, thermo dynamics, and solid mechanics.
Challenges
These new technologies seek to advance the state of the art
by addressing core challenges faced by aerospace engineers,
physicists, and design teams in the industry. Often, scientists
developing multi-physics models start by creating individual
models coupled to make a multi-physics system. Besides representing
different types of physics, the individual models can
be created by entirely different teams relying on different solving
techniques and be implemented in incompatible frameworks
and languages, or target incompatible hardware platforms.
These caveats can increase development time, create
manual work (that should be automated), and make room for
hard-to-detect errors.
The new techniques being developed will enable scientists
to create new models to represent this NASA application and,
more generally, the complicated world we live in. Domainspecific
tools will enable the easy translation of scientific
thinking to high-performance code. These work results are expected
to dramatically lower the bar to build, maintain, and
execute multi-physics models.
This article was written by Dr. Charisee Chiw and Dr. Eric
Davis, Scientists, Galois, Inc. (Portland, OR). For more information,
visit http://info.hotims.com/79418-501.
References
[1] Meyn, Larry A., and Kevin D. James. " Integrated tail buffet
loads on the F/A-18. " RECON 20010062152 (1994).
[2] Michopoulos, John G., Charbel Farhat, and Jacob Fish.
" Modeling and simulation of multiphysics systems. " (2005):
198-213
Aerospace & Defense Technology, October 2021
Intro
Cov
ToC
+
Free Info at http://info.hotims.com/79418-791
-
A
µ
15
È
http://info.hotims.com/79418-791 http://info.hotims.com/79418-501 http://info.hotims.com/79418-967
Aerospace & Defense Technology - October 2021

Table of Contents for the Digital Edition of Aerospace & Defense Technology - October 2021
