Abstract
In the feed drive system consisting of a cylindrical linear motor and linear ball guides, the friction force caused in linear ball guides greatly influences the behavior of the feed drive system. In this study, the influence of friction characteristics on the behavior of various motions was clarified from both sides of experimental results and simulation by using a mathematical model of non-linear spring characteristic and relationship between velocity and friction force under micro-scopic motion. As the result, the proposed model can express the actual behaviors accurately. Then, to clarify the relation between the vibration damping behavior to non-linear spring characteristic, non-linear spring characteristic was changed from proposed model and was compared with the logarithmic decrement. As the result, it has been understood to show the logarithmic decrement in not only non-linear spring characteristic but also amplitude of vibration.
