Li 3un is a Ph.D. student at Northwestern Polytechnical University. His main research interests are aircraft design and high survivability analysis. Corresponding author. Tel.: + 86 29 88495914. E-mail addresses: lijunwsw@163.com (J. Li), Yang Wei is a professor at Northwestern Polytechnical University and a boffin in Chengdu Aircraft Design and Research Institute. His main research interests are aircraft design and flight control design. Yangw@cadi.ac.cn (W. Yang), Pei Yang is a associate professor at Northwestern Polytechnical Uni- versity. His main research interests are aircraft survivability/vulnera- bility analysis.peiyang_yang@163.com (Y. Pei).