Seminar Details:

LANS Informal Seminar
"Multifidelity Methods for Multidisciplinary System Design"

DATE: April 12, 2011

TIME: 10:30:00 - 11:30:00
SPEAKER: Andrew March, PhD candidate, MIT Department of Aeronautics & Astronautics
LOCATION: Building 240, 4301, Argonne National Laboratory

Description:
The ability to optimize complex systems using high-fidelity simulations can yield systems with unprecedented performance. Complex systems range from aircraft to integrated circuits to power systems, all of which may now be accurately simulated on a supercomputer. However, the cost of these simulations is too high for optimization to be tractable. Furthermore, the sensitivity of a system's performance to its design variables is often not available, and the system performance estimate may vary between simulations due to the presence of uncertainties. This presentation will suggest a multifidelity framework to reduce the cost of designing systems with the most accurate simulations available. This framework progressively calibrates less expensive, lower-fidelity simulations to accelerate finding designs that are optimal with respect to the high-fidelity simulations. Novel aspects of this research are that the framework can be proven to converge to a high-fidelity optimal design even in the absence of high-fidelity sensitivity information, and that the system optimization can be parallelized.


 

Please send questions or suggestions to Debojyoti Ghosh: ghosh at mcs dot anl dot gov.