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B. Heinzl:
"Objektorientierte Multi-Domain-Modellierung und Simulation von Werkzeugmaschinen";
Supervisor: F. Breitenecker; Institut für Analysis und Scientific Computing, 2012; final examination: 2012-06-04.

There are currently a number of research projects which aim at increasing energy e ciency in production plants by using comprehensive simulation models to make quali ed predictions about the e ciency of di erent energy saving measures and identify optimization potential.
This requires investigation of production machines as part of the micro-structures in production facilities.
To study modelling and simulation of machine tools, a simulation model of a CNC turning lathe as an example of a production machine is developed. For that, we consider an existing turning lathe in order to be able to validate the models against real measurement data.
Using an object-oriented modelling approach for physical systems allows combining component models of electrical, mechanical and thermal aspects in a structural manner and also provides exibility and easy expandability for combining this bottom-up approach with
stepwise top-down modelling in several stages with increasing level of detail. This enables identifying numerical boundaries of the simulation and shows which model complexity can be handled with su cient performance and which physical components can therefore be taken into account.
The rst stage in the modelling process contains a model of the basic electrical and mechanical components as well as the feed and cutting forces occurring during the cutting process. In the second stage, the model is expanded by a vector control for all drive motors as well as
thermal aspects. The nal model also contains elements for power electronics and improved dynamic calculation of the cutting forces.
Simulation of di erent scenarios then allows evaluation of energy consumption and distribution in the System, comparison of feed and cutting forces plus information about waste heat generation in di erent places.
The models described here are implemented in MATLAB ® /Simscape
-as a common simulator for object-oriented modelling of physical systems.