Dr.-Ing. Alexandra Ast (née Ratering) (2003 - 2008)

	Address	Alexandra Ast TRUMPF Werkzeugmaschinen GmbH + Co. KG Johann-Maus-Straße 2 71254 Ditzingen
	Email

Field of Research

Modular, autonomous adaptive compensation of vibrations in machine-tools with truss structures

Dissertation

Publications

• Ratering, A.M.: Control Theoretic Analysis of Closed-Loop Production Planning and Control Systems, thesis (M.S.). Madison, WI: University of Wisconsin, 2002.
• Ratering, A.M.; Duffie, N.A.: Design and Analysis of a Closed-Loop Single-Workstation PPC System. Annals of the CIRP, Vol.52, Nr. 1, pp. 255-358, 2003.
• Ratering, A.; Eberhard, P.: Flatness-based Control of a Machine Tool with Lambda Kinematic. Proc. of the Nolcos 2004, 6th IFAC-Symposium on Nonlinear Control Systems, September 1-3, Stuttgart, F. Allgöwer, M. Zeitz (Eds.), Elsevier, 2005. ( zu eq. (7) )
• Ratering, A.; Eberhard, P.: Simulation und Regelung einer Werkzeugmaschine mit Lambda-Kinematik. Workshop des VDI/VDA-GMA Fachausschuss 1.40 "Theoretische Verfahren der Regelungstechnik", Interlaken, 26.-28.9.2004, Workshop-Unterlagen, K. Schlacher (Ed.), 2005, pp. 147-164.
• Ratering, A.; Eberhard, P.: Nonlinear Control of a Machine Tool with Parallel Kinematics. Proc. of the ECCOMAS Thematic Conference on Multibody Dynamics 2005, J.M. Goicolea, J. Cuadrado, J.C. Garcia Orden (Eds.), Madrid, Spain.
• Ratering, A.; Eberhard, P.: A Control Concept for Parallel Kinematics. Proc. of the IUTAM Symposium on Vibration Control of Nonlinear Mechanisms and Structures, July 18-22 2005, München, H. Ulbrich, W. Günthner (Eds.), Dordrecht Springer, 2005, pp. 255-265.
• Ast, A.; Eberhard, P.: Flatness-based Control of Parallel Kinematics Using Multibody Systems - Simulation and Experimental Results. Archive of Applied Mechanics, Vol. 76, No. 3-4, pp. 181-197 (DOI 10.1007/s00419-006-0014-z), 2006.
• Ast, A.; Eberhard, P.; Heisel, U.: Controller Design for Parallel Kinematics Using Flexible Multibody Systems Simulation, PAMM 2006.
• Ast, A.; Eberhard, P.: Nonlinear Position Control of a Scissors-like Kinematics with Elastic Bodies. Themenheft "Dynamics and Control", GAMM Mitteilungen, Vol. 31, Nr. 1, pp. 7-26, 2008.
• Ast, A.; Braun, S.; Eberhard, P.; Heisel, U.: Adaptronic Vibration Damping for Machine Tools. Annals of the CIRP, Vol. 56/1, 2007, pp. 379-382.
• Ast, A.; Eberhard, P.: Control Concepts for a Machine Tool with an Adaptronic Actuator. Multibody Dynamics 2007, ECCOMAS Thematic Conferences, C. Botasso (Ed.), Milano, Italy, 2007.
• Lu, J.; Ast, A.; Eberhard, P.: Modeling and Active Vibration Control of Flexible Structures Using Multibody System Theory. Proceedings Int. Conference on Mechanical Engineering and Mechanics, Nov. 5-7, 2007, Wuxi/China. Batra, R.C. et al. (Eds.), pp.1190-1195, Nonmouth Junction, USA: Science Press, 2007.
• Ast, A.; Eberhard, P.: Active Vibration Control for a Machine Tool with Parallel Kinematics and Adaptronic Actuator. Journal of Computational and Nonlinear Dynamics, Vol. 4, Issue 3, 2008.
• Eberhard, P.; Ast, A.; Henninger, C.; Ziegler, P.: Advanced Applications. In: CISM School on Simulation Techniques for Applied Dynamics. Arnold, M.; Schiehlen, W. (Eds.), pp. 313-375. Wien: Springer, 2008.
• Ast, C.R.; Assig, M.; Ast, A.; Kern, K.: Design criteria for scanning tunneling microscopes to reduce the response to external mechanical disturbances. Review of Scientific Instruments, Vol. 79, 2008.
• Ast, A.; Eberhard, P.: Active Vibration Damping and Model-Based Control for an Adaptronic Actuator. PAMM, Vol. 8, Issue 1, pp. 10875-10876, 2008.
• Ast, A.; Braun, S.; Eberhard, P., Heisel, U.: An Adaptronic Approach to Active Vibration Control of Machine Tools with Parallel Kinematics. Production Engineering, Online First, 2009.

Talks

• September 23, 2003: Ferienakademie 2003: Mechanik - Modellierung, Simulation und Optimierung, Sarntal, "Einführung in die Modellierung mit Mehrkörpersystemen".
• October 21, 2003: Seminar über Fragen der Mechanik, Universität Stuttgart, "Regelungstechnische Analyse von PPS-Systemen".
• April 7, 2004: Seminary of the Institute 2004, Burg Teck, Owen, "Active Vibration Damping for Machine Tools".
• September 1, 2004: 6th IFAC-Symposium on Nonlinear Control Systems (NOLCOS 2004), Stuttgart, "Flatness-based Control of a Machine Tool with Lambda Kinematic".
• September 27, 2004: Workshop des GMA-Fachausschuss 1.40 - Theoretische Verfahren der Regelungstechnik, Interlaken, Switzerland, "Simulation und Regelung einer Werkzeugmaschine mit Lambda-Kinematik".
• October 8, 2004: Dynamik Workshop 2004, Stuttgart, "Flachheitsbasierte Regelung einer Werkzeugmaschine mit Lambda-Kinematik".
• November 9, 2004: SIMPACK User Meeting 2004, Eisenach, "Modeling and Control of a Machine Tool Using Co-Simulation".
• June 9, 2005: Seminary of the Institute 2005, Roßberghaus, Reutlingen, "Implementation of the Flatness-based Position Control and Analysis of the New Adaptronic Rod".
• June 23, 2005: ECCOMAS Thematic Conference on Multibody Dynamics 2005, Madrid, Spain, "Nonlinear Control of a Machine Tool with Parallel Kinematics".
• July 20, 2005: IUTAM Symposium on Vibration Control of Nonlinear Mechanisms and Structures 2005, Munich, "A Control Concept for Parallel Kinematics".
• November 22, 2005: Multibody System Dynamics Laboratory, Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, USA, "Modeling and Control of Parallel Kinematics".
• March 6, 2007: EU-Course NUSIC, University of Zagreb, Croatia, "Modeling and Control of Flexible Multibody Systems with Simpack".
• May 4, 2007: Meeting of the GAMM-FA Dynamik und Regelungstheorie, Würzburg, "Modellbildung und Regelung einer elastischen Werkzeugmaschine mit adaptronischem Aktor".
• May 9, 2007: Seminary of the Institute 2007, Roßberghaus, Reutlingen, "Position Control and Active Vibration Damping".
• June 27, 2007: Multibody Dynamics 2007, ECCOMAS Thematic Conference, Milano, Italy, "Control Concepts for a Machine Tool with an Adaptronic Actuator".
• April 2, 2008: GAMM Jahrestagung, Bremen, "Active Vibration Damping and Model-Based Control for an Adaptronic Actuator".

Supervised Student- and Diplomatheses

• Linder, Thorsten: Prozessmodell und Regelung einer Werkzeugmaschine mit Lambda-Kinematik, Studienarbeit STUD-213. Universität Stuttgart, Institut B für Mechanik, 2004.
• Dangelmaier, Roswitha: Untersuchung einer aktiven Schwingungsdämpfung für ein Tieftemperatur Scanning Tunneling Microscope, Studienarbeit STUD-228. Universität Stuttgart, Institut B für Mechanik, 2005.
• Dolde, Bastian: Regelung einer Balkenstruktur, Studienarbeit STUD-229. Universität Stuttgart, Institut für Technische und Numerische Mechanik, 2006.
• Lu, Yun: Development of control concepts for active vibration damping in a low temperature Scanning Tunneling Microscope, Master Thesis DIPL-108. Universität Stuttgart, Institut für Technische und Numerische Mechanik, 2006.
• Maier, Sebastian: Hierarchische Regelung einer elastischen Scherenkinematik. Studienarbeit STUD-250. Universität Stuttgart, Institut für Technische und Numerische Mechanik, 2006.
• Hohenleitner, Ralph: Implementierung elastischer Mehrkörpersysteme in Simulink. Studienarbeit STUD-255. Universität Stuttgart, Institut für Technische und Numerische Mechanik, 2006.
• Eisele, Joachim: Flachheitsbasierte Regelung einer elastischen Scherenkinematik. Studienarbeit STUD-273. Universität Stuttgart, Institut für Technische und Numerische Mechanik, 2007.

Teaching

• Teaching Assistant of the lecture Applied Dynamics (part I, Passive Systems) (SS 04, SS 05, SS 06, SS 07)
• Teaching Assistant of the lecture Applied Dynamics (part II, Introduction to Mechatronics) (WS 05/06, WS 06/07)
• Teaching Assistant of the lecture Vehicle Dynamics (WS 07/08)

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