“…There are various types of uncertainties under discussion, such as time varying structured uncertainty(see for example, Shamma (1994), Mao et al (1998), Moon et al (2001), Lu et al (2003), Chen et al (2005), Yue and Han (2005), Huang and Mao (2009), Wang and Bai (2012), Kuang and Deng (2012), Hartung et al (2013), Zhu et al (2014a)), polytopic-type uncertainty (Peaucelle et al (2000), Shaked (2001), Xia and Jia (2002), He et al (2005), Li et al (2008), Li et al (2009)), and interval uncertainty (Mao and Selfridge (2001), Mao (2002), Mao and Yuan (2006), Udom (2012)). Robust stability of a uncertain system means that the system will be always stable for any possible quantities of uncertainties.…”