Robust Nonlinear Control of a Voltage-Controlled Magnetic Levitation System with Disturbance Observer. - Zi-Jiang Yang; Hiroshi Tsubakihara; Shunshoku Kanae; Kiyoshi Wada; Chun-Yi Su (CCA, 2007)

A Novel Robust Nonlinear Motion Controller With Disturbance Observer. - Zi-Jiang Yang; Hiroshi Tsubakihara; Shunshoku Kanae; Kiyoshi Wada; Chun-Yi Su (IEEE Trans. Control. Syst. Technol., 2008)