Modeling and Simulation of Nonlinear Friction in XY AC Servo Table

The non-linear friction is an important factor affecting the machine-finishing precision. The microscopic structure of friction contact surface is analysed, which is supposed as the viscoelasticity material. The modelling method of static friction is discussed. A partition friction model has been established separately in the pre-sliding regime and dynamic friction region. The friction in XY AC servo table is measured based on the newly designed strain sensor, which is used to estimate the related parameter of the model. The compensation effect of two models is compared using the simulation software. The result indicates the tracking errors using the partition friction model proposed in this article is smaller than that of the static Stribeck model, which shows that the new model can reflect the friction characteristic of the static friction stage