%0 Journal Article %T Application of Augmented Observer for Fault Diagnosis in Rotor Systems %A Zhentao Wang %A Rudolf Sebastian Schittenhelm %A Matthias Borsdorf %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_02.pdf