中文摘要：

硅材料的特殊电学特性使得传统的电火花线切割伺服控制系统所采用的放电状态检测方法失效。为此提出了一种采用“进给-后退-再进给”运动方式的往复渐进自适应控制方法。阐述了往复渐进自适应进给原理与运动控制流程，分析了通过往复渐进运动能够弱化换向纹的机理，并结合在线检测技术、预测控制及模糊控制理论实现了进给速度以及放电电流阂值等重要运动控制参数的自适应调整。在自主开发的伺服控制系统上进行了硅材料电火花线切割实验，结果表明所提出的新方法切实可行，具有较强的自适应控制能力与明显的弱化换向纹的效果。

英文摘要：

The special electrical properties of silicon material make the traditional method used in servo control system for wire-cut electrical discharge machining （WEDM） fail to detect discharge status. Therefore, a reciprocating progressive adaptive control method is proposed by means of back and forth feed motion. The principle of reciprocating progressive adaptive feed and the procedure of motion control are presented. The mechanism that why communicating stripes can be reduced by reciprocating progres- sive movement is analyzed. Moreover, the adaptive adjustment of key parameters such as feed rate and threshold of discharge current is implemented by adopting on-line measurement technology as well as predictive control and fuzzy control theories. Silicon material cutting experiment is done with the self- developed servo control system for WEDM. The experimental result shows that the proposed new meth- od is really feasible, and it has great adaptive control ability and is good at reducing communicating stripes.