Control Parameters in Non-linear Properties of Linear Guideway in Lateral Direction

To build reliable digital twins of machine tools (also known as “virtual machine tools”), the dynamic properties of nonlinear components in the model should be close to the actual counterpart. The nonlinear dynamics mean that the frequency response functions (FRFs) derived from tap tests are inaccurate because of difference in excitation levels. In this study, dynamic behavior of a linear guideway is sought experimentally using harmonic excitation. It is found that the dynamic properties are affected by (1) excitation level, (2) lubrication, (3) specified preload and (4) static lateral load, and the dynamic properties cannot be fully described using the Hertzian contact model.