Notice of Violation of IEEE Publication PrinciplesUnsteady Aerodynamic Force Modeling via S-BT Method

Notice of Violation of IEEE Publication Principles

"Unsteady Aerodynamic Force Modeling via S-BT Method"
by WeiGang Yao, Xu Min, Tianxiang Cai, Mao Ye, Yu Qian
in the 2009 International Conference on Information Engineering and Computer Science (ICIECS 2009), 2009, pp. 1-4

After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE\´s Publication Principles.

This paper contains significant portions of original text from the paper cited below. The original text was copied with insufficient attribution (including appropriate references to the original author(s) and/or paper title) and without permission.

Due to the nature of this violation, reasonable effort should be made to remove all past references to this paper, and future references should be made to the following article:

"Balanced Model Reduction via the Proper Orthogonal Decomposition"
by Karen Willcox, J. Peraire
in the American Institute of Aeronautics and Astronautics Journal, Vol. 40, No. 11, 2002, 2323-2330

The main goal of present paper is to construct an efficient reduced order model (ROM) for unsteady aerodynamic force modeling. Balanced Truncation (BT) is presented to address the problem. For conventional BT method, it is necessary to compute exact controllability and observability grammians. Although it is relatively straightforward to compute these matrices in a control setting where the system order is moderate, the technique does not extend easily to high order system. In response to the challenges, Snapshots-BT (S-BT) method is introduced for high order system ROM construction. The outline idea of S-BT method is that Snapshots of primary and dual system approximate the controllability and observability matrices in frequency domain. The method has been demonstrated for AGARD 445.6 wing aeroelastic system. All the results indicat- S-BT based ROM is efficient and accurate enough to provide a powerful tool for unsteady aerodynamic force modeling.