论文部分内容阅读
在超精密设计中,很可能没有可供选择的设计方案。在超精细进给情况下,压电执行器是一种潜在选择。目前,欧洲和日本刀具制造商为此正致力于磁致伸缩执行器的研究。压电材料和磁致伸缩材料都存在磁滞型非线性,以致这些系统的输出依赖于以前的输入,绝对定位仅通过反馈控制才能得到。本文采用模拟技术对脆性材料的超精密加工中(微米级)刀架定位的几种现代控制技术作了一番比较。
In ultra-precision design, there is probably no alternative design. Piezo actuators are a potential choice for ultra-fine feeding. At present, European and Japanese tool manufacturers are devoted to the magnetostrictive actuator research for this reason. Piezoelectric materials and magnetostrictive materials all have hysteresis nonlinearity, so that the output of these systems depends on the previous input, absolute positioning can only be obtained through the feedback control. In this paper, several modern control techniques for positioning the (micrometer) turret in the ultra-precision machining of brittle materials are compared using simulation techniques.