一种微小孔电火花加工模糊控制策略研究

针对微小孔电火花加工(EDM)放电环境恶劣、放电间隙状态复杂多变,以及采用传统的PID控制策略难于达到预期效果等问题,提出了一种基于多层压电陶瓷叠加驱动下的控制策略,并对其进行了控制算法研究,设计了一种微小孔电加工微进给模糊PID自适应控制系统,并进行了仿真试验来验证其控制效果。研究结果表明,采用模糊自适应控制策略能加快微进给系统的响应速度,具有稳定性好、精度高等优点,并得到了良好的控制效果,为微小孔电加工机床的实际应用打下了良好的理论基础。

Fuzzy control strategy research of a micro-hole EDM

In order to solve the problem of poor discharge environment, the complex and changing discharge state of micro-hole electrical discharge machining （EDM）, and traditional PID control strategy is difficult to achieve the expected effect, a controller was established in accordance with driven model of piezoelectric ceramic, and control algorithm was researched. Not only the control system of the micro-hole EDM was designed based on fuzzy adaptive PID, but also simulation experiment was carried out. The results indicate that the fuzzy adaptive PID control can speed up the response speed of micro-feed system, and it has good stability and high precision. So it gets good control effect. Solid theoretical foundation is layed for the practical application of micro-hole EDM machining in future.