基于现场总线的铣削加工过程自适应模糊控制  

Adaptive Fuzzy Control of Milling Process Based on Fieldbus

作　　者：赖兴余[1] 叶邦彦[1] 鄢春艳[2] 李伟光[1] 

机构地区：[1]华南理工大学机械工程学院,广东广州510640 [2]广东省科技干部学院机电工程系,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2005年第5期7-10,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(020917);广东省重点科技攻关项目(2003C102017)

摘　　要：在分析Profibus总线和模糊控制特点的基础上,针对铣削加工过程的非线性、时变性和不确定性,提出了基于现场总线的铣削加工过程自适应模糊控制的解决方案.采用输出比例因子和控制规则在线自调整的方法对切削参数变化的铣削力进行在线控制.仿真结果表明,该方案克服了传统的模糊控制动态响应较慢和鲁棒性较差的缺点,具有响应速度快、实时性和稳定性好等特点.当切削深度突变时,能在线自适应调整进给速度,使切削力接近参考值,实现恒力切削,防止刀具损坏和提高加工效率.Aiming at the nonlinearity, time-variability and uncertainty of the milling process, a scheme of the adaptive fuzzy control for the milling process based on the fieldbus is presented by considering the characteristics of fuzzy control and Profibus. A fuzzy controller with self-tuning output scaling factor and control rule is then designed and applied to the on-line control of the milling force with variable cutting parameters. Simulated results show that the proposed scheme solves the problems existing in the conventional fuzzy control, namely, slow response and weak robustness, and is of quicker response, better real-time feasibility and stability. It can adaptively adjust the feedrate online till achieving a constant milling force approaching the reference force in varied cutting conditions, thus improving the machining efficiency and protecting the tool.

关 键 词：现场总线 PROFIBUS-DP 铣削加工过程 自适应模糊控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]