摘要
为适应电火花成型加工中快速抬刀与慢速进给的大范围调速要求并提高其加工效率,本文采用永磁同步直线电机作为其主轴伺服系统。根据成型加工的非线性和多种不确定因素,分析直线电机运行时的扰动力,结合了模糊理论与数字PID并对扰动力加以观测,建立PID参数自整定的模糊推理规则,设计永磁同步直线电机进给系统的速度优化控制器。通过MATLAB/Simulink进行系统仿真与实验,结果表明该基于扰动观测模糊PID控制具有更好的动态稳定性与跟踪性能,对外界干扰有较好的鲁棒性。
A permanent magnet synchronous linear motor （PMLM） was applied in EDM （electric discharge machining） to meet the requirements of quick jump and slow feed. Firstly, the disturbing force of PMLM was discussed according to the nonlinear and uncertain factors. The fuzzy control rules were established by combining fuzzy theory and PID, and the disturbance were observed. The simulation was completed by using MATLAB software, and the results show that the proposed control method has good dynamic stability and robustness.
出处
《轻工机械》
CAS
2013年第4期56-59,68,共5页
Light Industry Machinery
基金
浙江省教育厅科研项目(Y201328515)
宁波市重大科技攻关项目(2011B1031)
高等学校博士学科点专项科研基金(20120101130003)
关键词
电火花成型加工
直线电机
模糊PID
扰动观测
electro-discharge machining （ EDM ）
permanent magnet linear synchronous motor （ PMLM ）
Fuzzy PID
disturbance observer
