摘要
本文研究电火花加工电压的模糊控制技术．着眼于改善系统的稳定性与抗干扰稳健性，探讨了模糊控制器的设计计算与调整方法，具体提出了一种对模糊控制器中各语言值选用不同类型隶属函数的新控制方案；研究了控制器与系统各比例因子的调整技术；还探索了电火花加工电压的建模，以保证仿真计算的精确实用性．
It is well known that stable voltage under severe disturbances is ideal for clectro-discharge machining but very hard to attain with ordinary controller. In this paper, the design of a m7ny controller is presented that can ensure stable voltage. The authors' new design is first tried on a simulation model and the results obtained arc found satisfactory. Then the authors build a fuzzy controller in the laboratory with good stability and robustness. Good stability and robustness arc achieved through taking mainly two technical measures: 1. In the neighborhood of operating point, the membership function of language value of the system input is of trapezoidal form instead of the usual triangular form. 2. Principles that govern the choice of the scaling factors arc stated in the paper, after fully discussing the effects of various scaling factors on the system. The laboratory controller works out well on a precision clectro-discharge machine. This type of fuzzy controller is expected to find use in production.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
1994年第3期407-411,共5页
Journal of Northwestern Polytechnical University
关键词
模糊控制
电火花加工
稳健性
电压
fuzzy control, electro-discharge machining, stability, robustness
