Control approaches to the suppression of machining chatter using active magnetic bearings

被引:79
作者
Chen, Min [1 ]
Knospe, Carl R. [1 ]
机构
[1] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22903 USA
基金
美国国家科学基金会;
关键词
controller synthesis; feedback linearization; machining chatter; machining dynamics; magnetic bearing; robust control; time delay; FEEDBACK LINEARIZATION; STABILITY; SYSTEMS; ACTUATOR; DESIGN; DELAY; MODE;
D O I
10.1109/TCST.2006.886419
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Several control approaches to the active suppression of machining chatter, a self-excited vibration that limits metal removal rate, are examined using a specially constructed turning experiment. The experiment employs a magnetic bearing for actuation and mimics the dynamics of a flexible rotor. Control forces are applied and vibration measurements taken at a location along this structure that is not collocated with the, tool. Three control approaches are considered: speed-independent control, speed-specified control, and speed-interval control. Experimental results with these are compared to those obtained using proportional-integral-derivative (PID) control, a standard approach in the magnetic bearing industry today. Significant improvements over PID in machining stability lobes are obtained and the capability to highly tailor the cutting tool compliance so as to inhibit the onset of chatter is demonstrated. Cutting tests are also presented which demonstrate the significant improvements in chatter-free chip width that may be obtained with advanced control methods.
引用
收藏
页码:220 / 232
页数:13
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