Acknowledgements

The author would like to thank Mr. Richard Fürhapter and Mr. Gerhard Wurzinger for their perfect test bench support, and to Austrian Research Promotion Agency (FFG) and to Austrian Science Fund, FWF (Fonds zur Förderung der wissenschaftlichen Forschung) for providing financial support. Part of this study was funded with the grant number FWF—P27967. This work has been also supported by the COMET-K2 Center of the Linz Center of Mechatronics (LCM), funded by the Austrian federal government and the federal state of Upper Austria. Additionally, the author would like to thank Dr. Maria Rusnak for the proofreading and for valuable corrections.
