Abstract
A circular motion test is usually used for evaluating the performance of the feed drive systems. In the circular trajectories, quadrant glitches are often found, and it is known that the phenomenon is caused by friction force. Various friction models have been proposed in order to analyze the behavior of the systems. However, the friction models already proposed can not been applied to the design of controller because the friction models have several parameters to be determined by experiment. In this study, a new simple friction model is proposed by considering the relationship between the driving force and friction one. As a result of simulation using the proposed model, the quadrant glitches are well expressed. The relationship between the value of parameter of the friction model and the height of the quadrant glitch is also discussed. Moreover, the circular motion is simulated at various radii and feed rates, and the improved friction model is proposed for high feed rate.
