回転形円筒工具を使用したCNC自由曲面加工機の開発 : 第2報, 適応フィードフォワード制御による追従精度の向上

概要

論文の詳細を見る
To accomplish high-precision machining, it is essential to minimize the tracking error of machine tool servosystems. A controller for the servosystems should compensate the tracking error due to servosystem dynamics and reduce the influence of parameter change on the controlled system. In this regard, we designed and implemented an adaptive feedforward controller and a dead band compensator on the CNC machine tool developed in our previous report. The feedforward controller consists of an on-line parameter adjustment device coupled with a discrete time inverse transfer function. Experiments including cutting tests proved that the dead band compensator always effectively reduces the tracking error. The inverse transfer function greatly improves the tracking accuracy when the on-line parameter adjustment device is working, although a disturbing signal or load is applied on the system. Without the parameter adjustment device, however, the implemented inverse transfer function can increase the tracking error.
一般社団法人日本機械学会の論文
1996-12-25