A stochastic expansion-based approach for design under uncertainty

Robust design;Uncertainty

Walter, Miguel ; Aerospace Engineering

University:Georgia Institute of Technology

Department:Aerospace Engineering

关键词: Robust design;    Uncertainty;   

Others  :  https://smartech.gatech.edu/bitstream/1853/47562/1/walter_miguel_a_201305_phd.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

An approach for robust design based on stochastic expansionsis investigated. The research consists of two parts : 1) stochastic expansions for uncertainty propagation and 2) adaptive sampling for Pareto front approximation. For the first part,a strategy based on the generalized polynomial chaos (gPC) expansion method is developed. Second, in order to alleviate the computational cost of approximating the Pareto front, two strategies based on adaptive sampling for multi-objective problems are presented.The first one is based on the two aforementioned methods, whereas the second one considers, in addition, two levels of fidelity of the uncertainty propagation method.