%0 Journal Article %T State Feedback in the Context of a Gyroscopic Rotor using a Disturbance Observer %A Rudolf Sebastian Schittenhelm %A Zhentao Wang %A Bernd Riemann %A Stephan Rinderknecht %J Engineering Letters %D 2013 %I International Association of Engineers %U http://www.engineeringletters.com/issues_v21/issue_1/EL_21_1_06.pdf