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Accession Number ADA564378
Title Collaborative Research: Model Reduction For Probabilistic Analysis And Design Under Uncertainty.
Publication Date Feb 2012
Media Count 14p
Personal Author D. C. Sorensen K. E. Willcox M. Heinkenschloss
Abstract Effective computational tools to support decision-making under uncertainty are becoming essential in the design and operation of aerospace systems. The accurate and efficient propagation of uncertainties in parameters through complex, high fidelity computational models is a significant challenge. Since analytical characterizations of uncertainties in the system outputs are typically not available, numerical methods must be used that require repeated evaluations of models at suitably sampled parameters. Model reduction is a promising technique to substantially reduce the computational cost involved in the propagation of uncertainty. This collaborative project has provided new algorithmic tools and analyses for model reduction of nonlinear systems, demonstrated their application to various systems including uncertainty quantification in chemically reacting flows, and developed adaptive stochastic collocation methods for optimization problems governed by partial differential equations with uncertain inputs.
Keywords Accuracy
Adaptive systems
Algorithms
Computations
Costs
Decision making
Efficiency
Flow
Mathematical models
Models
Numerical methods and procedures
Operation
Optimization
Output
Parameters
Partial differential equations
Probability
Propagation
Reduction
Sampling
Stochastic processes
Uncertainty


 
Source Agency Non Paid ADAS
NTIS Subject Category 72F - Statistical Analysis
Corporate Author Massachusetts Inst. of Tech., Cambridge. Dept. of Aeronautics and Astronautics.
Document Type Technical report
Title Note Final rept. 1 Mar 2009-30 Nov 2011.
NTIS Issue Number 1303
Contract Number FA9550-09-1-0239 FA9550-09-1-0225

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