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Analog versus Digital Control of Boring Bar Vibration
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2005 (English)Conference paper, (Refereed) Published
Abstract [en]

In workshops where metal cutting is performed, the machining processes frequently introduces productivity degrading vibration problems and annoying sound, sometimes almost at unbearable levels. Besides producing disturbing noise, the vibrations affect the surface finish of the workpiece and the tool life. Two different approaches based on feedback control are investigated, both applied for the control of an active boring bar. The first approach is based on a digital adaptive feedback controller; the feedback filtered-X LMS algorithm. The second approach is based on an analog controller; a feedback controller with gain and phase orthogonally adjustable, thus flexible for the control of systems with different dynamic properties. Based on open loop frequency response function estimates, robustness and stability of both the digital and the analog feedback control system are discussed. A comparison of the two controllers concerning their boring bar vibration attenuation performance shows that the analog controller attenuates the vibration in same order of magnitude as the digital controller which is approximately by up to 40 dB.

Place, publisher, year, edition, pages
Dallas, 2005.
Keyword [en]
Active, Adaptive, Control
National Category
Signal Processing Applied Mechanics
Identifiers
URN: urn:nbn:se:bth-10343Local ID: oai:bth.se:forskinfo043888085A16BC5CC12571BE003530BCOAI: oai:DiVA.org:bth-10343DiVA: diva2:838447
Conference
World Aerospace Congress
Available from: 2012-09-18 Created: 2006-08-02 Last updated: 2015-06-30Bibliographically approved

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Håkansson, LarsClaesson, Ingvar
Signal ProcessingApplied Mechanics

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