Adaptronic gantry machine tool with piezoelectric actuator for active error compensation of structural oscillations at the tool centre point

被引：10

作者：

Stoeppler, Guido ^{[1
]}

Douglas, Steve ^{[2
]}

机构：

[1] Siemens AG, Ind Sector, D-91056 Erlangen, Germany

[2] Liverpool John Moores Univ, Sch Engn, Liverpool L3 3AF, Merseyside, England

来源：

MECHATRONICS | 2008年 / 18卷 / 08期

关键词：

adaptronic gantry machine tool; active error compensation; structural oscillation observer; piezo actuator;

D O I：

10.1016/j.mechatronics.2008.03.002

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In modern high dynamic gantry type machine tools rotary motors for feed axes have been replaced by linear direct motors. Thus, the limiting parameter in terms of the dynamic response is now the mechanical structure itself. Current design wisdom to improve the cutting accuracy is to increase the rigidity of essential machine components. This detrimentally results in either higher masses to be moved or sophisticated reinforcements being applied to the cross-arm or both. The adaptronic gantry concept proposed in this paper overcomes the need for stiffer machine structures but incorporates a light weight cross-arm. The occurring cross-arm's structural oscillations are actively compensated by means of an additional piezo actuator that is attached between the cutting head, that moves along the cross-arm, and the tool. The piezo command is obtained from an observer that utilises additionally sensed acceleration information. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：426 / 433

页数：8

共 31 条

[1] A ballscrew drive mechanism with piezo-electric nut for preload and motion control [J].