Summary
Active vibration control of rotating structures can be a challenging task due to the nonlinearities induced by rotation \textit{i.e} modal frequency shifts or damping variations. In addition, cyclic boundary conditions like a permanent contact of the rotor with a stator element at a particular angle can significantly modify the frequency response between embedded control actuators and sensors within the rotating frame. In this study, a robust observation and control method is proposed and applied experimentally to a rotating spoked structure recreating the cyclic conditions of a vehicle wheel on the road. A special consideration is given to the robust nonlinear observer to ensure its correct tracking of the system states despite high cyclic modeling uncertainties due to the rotation.
