摘要
依据汽车活塞采用异形销孔的必要性和国内外异形销孔加工的现状,采用压电陶瓷驱动的柔性铰链机构实现镗刀的径向微位移。根据活塞异形销孔几何特征和压电陶瓷驱动器的控制精度高、刚性好和大频响特点,在位置反馈的系统中引入重复控制和反馈通道的开不前馈控制,从而提高了系统的稳定性和跟踪精度。实验表明加工精度可达3μm。
According to the necessity of non-circular piston pinhole and actuality of its manufacturing,a piezoelectric actuator driven micro-displacement mechanism is put forward to achieve the feeding of boring tool. On the basis of geometric festure of piston pinhole and the characteristics of piezoelectric actuators ,which have infinite resoluion,high stiffness and high frequency ,a repetitive controller and feed-forward controller in open-loopdistuebance channel are intriduced into the system based on displacement feedback. As a result ,the robustness and tracking precision of the system are bettered. It＇s shown by experiments that 3-micron machining accuracy can be achieved.
出处
《压电与声光》
CSCD
北大核心
2005年第5期518-520,528,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50175072)
关键词
异形销孔
压电陶瓷驱动器
重复控制
non-circular pinhole
piezoelectric actuator
repetitive control
