Object-oriented modeling of machine tool feed axes: An approach to analysis of control parameters

Feed drives are one of the most important parts of machine tools. Their static and dynamic behavior strongly influences the positioning accuracy and their speed determines productivity. The control parameters play a decisive role concerning the performance of the mechatronic system and for control analysis, a sufficient model of the feed drive system is necessary. This paper demonstrates the structure of a feed drive system using object-oriented modeling in MATLAB/ SIMSCAPETM. The model is validated by comparing simulation with measured results for the example of a precision machining center. The modeling methodology of feed drives illustrated in this paper provides a tool, which enables engineers to analyze and optimize the control parameters in the machine tool design phase.