TITLE:
Adaptive Fuzzy Sliding Controller with Dynamic Compensation for Multi-Axis Machining
AUTHORS:
Hu LIN, Rongli GAI
KEYWORDS:
Fuzzy Sliding Control, Adaptive, Compensation Control, Tracking Error
JOURNAL NAME:
Journal of Software Engineering and Applications,
Vol.2 No.4,
November
27,
2009
ABSTRACT: The precision of multi-axis machining is deeply influenced by the tracking error of multi-axis control system. Since the multi-axis machine tools have nonlinear and time-varying behaviors, it is difficult to establish an accurate dynamic model for multi-axis control system design. In this paper, a novel adaptive fuzzy sliding model controller with dynamic compensation is proposed to reduce tracking error and to improve precision of multi-axis machining. The major ad-vantage of this approach is to achieve a high following speed without overshooting while maintaining a continuous CNC machine tool process. The adaptive fuzzy tuning rules are derived from a Lyapunov function to guarantee stability of the control system. The experimental results on GJ-110 show that the proposed control scheme effectively minimizes tracking errors of the CNC system with control performance surpassing that of a traditional PID controller.