微细电火花加工放电状态逐级映射检测方法

在微细电火花加工中，对放电状态的准确检测是实现加工过程稳定控制的前提条件，而微细电火花加工过程中频繁出现的放电信号严重畸变、放电状态不稳定甚至突变等实际情况，使放电状态的准确检测成为微细电火花加工的技术难点之一。本文在分析和研究传统的微细电火花加工放电状态检测方法的基础上，结合系统辨识和模糊逻辑理论，提出了微细电火花加工放电状态逐级映射检测原理和方法。对实时采集到的极间电压和电流信号，通过模糊运算判别采样点的放电状态，再将采样点放电状态值映射为放电状态矢量，并对该矢量进行统计得到“短路率”和“火花/电弧率”，经过模糊推理辨识出各分析周期的放电状态。实验表明，该检测方法准确性高、运算量低并且运算速度快，检测结果为微细电火花放电加工过程的实时控制提供系统放电状态的反馈输入，保证了加工控制系统的稳定性和准确性。

The Successive Mapping Detection Method of Micro EDM Discharge State Detection

To measure precisely the discharge state and overcome the shortcomings of the distortion of discharge signals and the instability of discharge state,the principle and method of successive mapping detection were proposed combined with the system identification and fuzzy control after analysis on traditional discharge state detection methods in micro Electrical Discharge Machining(EDM). For real-time collected gap voltage and current signals in the process,the fuzzy operation was used to identify the discharg...