音圈式快速伺服刀架的分析与设计  

Analysis and Design of Voice-coil Actuator Used in Fast Tool Servo

作　　者：杨帆[1] 杨海宽[1] 陈志华[1] 王贵林[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《国防科技大学学报》2009年第4期42-47,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金重点项目(50735007)

摘　　要：自由曲面光学零件面形复杂,快刀伺服车削加工是其高效加工手段。针对压电陶瓷型伺服刀架行程小,加工能力有限的问题,提出一种基于音圈式直线电机驱动的快刀伺服方案。音圈式快速伺服刀架行程大,可大大拓宽快刀伺服加工范围。以典型光学零件加工为例,对快速伺服刀架所应具备的关键性能指标进行分析,给出了音圈电机的结构,对音圈式伺服刀架进行了理论建模、控制器设计以及实际性能测试。测试结果表明,所设计的音圈式伺服刀架行程大、频响高,在刀架行程为±100μm时可达到300Hz的频响能力,同样行程下的频响指标优于国外同类产品。Free-Form optics have complicated surfaces and the fast tool servo（FIS） is a highly effective method to fabricate such parts. With regard to the fact that the piezoelectric FTS actuator has limited fabricating capacity as of its low stroke, a long stroke FTS project driven with voice ceil actuator （VCA） was presented. Compared with piezoelectric actuator, the VCA can fabricate broader range of parts owing to its longer stroke. Illustrated with a typical optical freeform part, the key performance parameters of FTS are analyzed. The structttre of VCA was given, the theoretical model of VCA was built, the closed-loop controller was designed and the actual performance of VCA actuator was tested. Tne test results indicate that the designed VCA actuator has long stroke and high frequency response, and the frequency response can reach 300Hz when at stroke of 200μm, More important, at this level of stoke, the frequency response presented is better than similar products abroad.

关 键 词：光学自由曲面 快刀伺服 音圈电机 行程 频响 

分 类 号：TH871[机械工程—仪器科学与技术]