2Hongwei Fang, Changliang Xia, Jie Xiu, "Research on the perturbation stability margin when the controller is fixed intelligent control and automation" [C],The Sixth World Congress on Intelligent Control and Automation, 2006: 2131-2135.
4Hongwei Fang, Changliang Xia, Jie Xiu, "Research on the perturbation stability margin when the controller is fixed intelligent control and automation"[C],The Sixth World Congress on Intelligent Control and Automation, 2006: 2131-2135.