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Mathematical Problems in Engineering
Volume 2017 (2017), Article ID 4217217, 11 pages
https://doi.org/10.1155/2017/4217217
Research Article

New Systematic CFD Methods to Calculate Static and Single Dynamic Stability Derivatives of Aircraft

1School of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China
2Xi’an Modern Control Technology Research Institute, Xi’an, Shaanxi 710065, China

Correspondence should be addressed to Bai-gang Mi

Received 17 September 2016; Revised 27 November 2016; Accepted 19 December 2016; Published 9 January 2017

Academic Editor: Ilhan Tuzcu

Copyright © 2017 Bai-gang Mi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Several new systematic methods for high fidelity and reliability calculation of static and single dynamic derivatives are proposed in this paper. Angle of attack step response is used to obtain static derivative directly; then translation acceleration dynamic derivative and rotary dynamic derivative can be calculated by employing the step response motion of rate of the angle of attack and unsteady motion of pitching angular velocity step response, respectively. Longitudinal stability derivative calculations of SACCON UCAV are taken as test cases for validation. Numerical results of all cases achieve good agreement with reference values or experiments data from wind tunnel, which indicate that the proposed methods can be considered as new tools in the process of design and production of advanced aircrafts for their high efficiency and precision.