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Research Papers

An Approximation Approach to General Robustness Assessment for Multidisciplinary Systems

[+] Author and Article Information
Xiaoping Du1

Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, 400 West, 13th Street, Rolla, MO 65409-4494dux@mst.edu

Yi Zhang

Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, 400 West, 13th Street, Rolla, MO 65409-4494

1

Corresponding author.

J. Comput. Inf. Sci. Eng 10(1), 011003 (Feb 12, 2010) (9 pages) doi:10.1115/1.3290765 History: Received October 17, 2008; Revised July 19, 2009; Published February 12, 2010; Online February 12, 2010

In many engineering applications, both random and interval variables exist. The mixture of both types of variables has been dealt with in robust design for single-disciplinary systems. This work focuses on robustness assessment for multidisciplinary systems with both random and interval variables. To alleviate the intensive computational demand, a semi-second-order Taylor expansion method is proposed to evaluate robustness. A performance function is approximated with linear terms of random and interval variables, as well as the interaction terms between the two types of variables. Then the maximum and minimum standard deviations of the performance function are computed. With the proposed method, the impact of both random and interval variables on the system robustness can be evaluated efficiently.

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Copyright © 2010 by American Society of Mechanical Engineers
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A multidisciplinary system

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Compound cylinder system

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System structure of the compound cylinders

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Figure 1

A single-disciplinary system

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