[ASME ASME 2015 Dynamic Systems and Control Conference - Columbus, Ohio, USA (Wednesday 28 October 2015)] Volume 2: Diagnostics and Detection; Drilling; Dynamics and Control of Wind Energy Systems; Energy Harvesting; Estimation and Identification; Flexible and Smart Structure Control; Fuels Cells/Energy Storage; Human Robot Interaction; HVAC Building Energy Management; Industrial Applications; Intelligent Transportation Systems; Manufacturing; Mechatronics; Modelling and Validation; Motion and Vibration Control Applications - Torsional Vibrations in the Drivetrain of DFIG- and PMG-Based Wind Turbines: Comparison and Mitigation