バックラッシを有する送りねじ機構の動的挙動

概要

論文の詳細を見る
A lead screw is a typical power transmission mechanism and is often used in a positioning system. Fundamentally, the lead screw has backlash between a screw and a nut, which causes chattering vibration and a long positioning time. In many practical cases, the backlash is adjusted to zero by using, for example, a double nut. However, the adjustment produces a large frictional force which makes table motion slow and generates heat. The purpose of this research is to realize a high-speed and high-precision positioning system using conventional lead screw mechanisms with backlash. For the first step, dynamic behavior of the lead screw mechanism with backlash is examined using the experimental mechanism comprising a sliding screw, a table and a DC motor. In the experiments, the table position, the rotation angle of the screw and the motor current are measured. The force transmitted from the screw to the table is estimated by a disturbance observer. The frictional force between the screw and nut and the acceleration of the table and the screw are calculated from estimated values.
一般社団法人日本機械学会の論文
1995-04-25