The Application of Self-tuning Adaptive Control and Cross-Couple Control in Retrofited Milling Machine

• Main Authors: Ming-Hung Lee, 李明鴻
• Other Authors: Mu-Tian Yan
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/66849650772454937017

碩士 === 華梵大學 === 機電工程研究所 === 90 === In this paper, the control plant is a ball screw actuated milling machine table which has been retrofit with D.C. servo motor control. The retrofit milling machine has nonlinear time-varying behaviors because of the effect of irregular coulomb friction of the sliding surface and obvious backlash. Thus, it is difficult for a conventional digital controller to achieve required contouring accuracy and assure stability of closed-loop system. To improve contouring performance of the retrofit milling machine, a self-tuning adaptive control strategy, combined with cross-coupled control of axial motion is proposed. This control scheme can assure the stability problem of closed-loop system. Experimental results are presented to contouring accuracy improvement by the proposed control method.