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Adaptive Active Control of Machine-Tool Vibration in a Lathe - Analysis and Experiments

Håkansson, Lars LU (1999)
Abstract
In the turning operation the relative dynamic motion between cutting tool and workpiece, or vibration, is a frequent problem, which affects the result of the machining, and in particular, the surface finish. Tool life is also influenced by vibration. Noise in the working environment frequently occurs as a result of dynamic motion between the cutting tool and the workpiece. The research study includes the analysis of the statistical and dynamic properties of tool vibration in external turning, a foundation in optimal and adaptive signal processing that enables the active control of tool vibration in a lathe. It was found that the adaptive feedback control enables a broad-band attenuation of the tool vibrations, and is able to reduce the... (More)
In the turning operation the relative dynamic motion between cutting tool and workpiece, or vibration, is a frequent problem, which affects the result of the machining, and in particular, the surface finish. Tool life is also influenced by vibration. Noise in the working environment frequently occurs as a result of dynamic motion between the cutting tool and the workpiece. The research study includes the analysis of the statistical and dynamic properties of tool vibration in external turning, a foundation in optimal and adaptive signal processing that enables the active control of tool vibration in a lathe. It was found that the adaptive feedback control enables a broad-band attenuation of the tool vibrations, and is able to reduce the vibration level by almost 40 dB simultaneously at 1.5 kHz and 3 kHz. Further, the adaptive control reduced the acoustic noise level and it enabled a broad-band attenuation of the sound pressure in the frequency band 1.5 kHz to 25 kHz, with up to approximately 35 dB sound pressure level at 3 kHz. A significant improvement in the workpiece surface was also observed with the adaptive control. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Nicolescu, Cornel-Mihai, Department of Production and Materials Engineering, Royal Institute of Technology
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Materiallära, Material technology, Metal Cutting, Lathe, Tool Vibration, Active Control, Adaptive Signal Processing, materialteknik
pages
183 pages
publisher
Division of Production and Materials Engineering, Lund University,
defense location
Maskinhuset Room M:E, Ole Römers väg 1, Lund
defense date
1999-02-26 10:15
external identifiers
  • Other:ISRN: LUTMDN/(TMMV-1039)/1-183/(1999)
ISBN
91-628-3356-1
language
English
LU publication?
yes
id
860fbdc0-4a04-4bc6-95b4-70ae4c6618ce (old id 19066)
date added to LUP
2007-05-24 13:51:53
date last changed
2016-09-19 08:45:02
@phdthesis{860fbdc0-4a04-4bc6-95b4-70ae4c6618ce,
  abstract     = {In the turning operation the relative dynamic motion between cutting tool and workpiece, or vibration, is a frequent problem, which affects the result of the machining, and in particular, the surface finish. Tool life is also influenced by vibration. Noise in the working environment frequently occurs as a result of dynamic motion between the cutting tool and the workpiece. The research study includes the analysis of the statistical and dynamic properties of tool vibration in external turning, a foundation in optimal and adaptive signal processing that enables the active control of tool vibration in a lathe. It was found that the adaptive feedback control enables a broad-band attenuation of the tool vibrations, and is able to reduce the vibration level by almost 40 dB simultaneously at 1.5 kHz and 3 kHz. Further, the adaptive control reduced the acoustic noise level and it enabled a broad-band attenuation of the sound pressure in the frequency band 1.5 kHz to 25 kHz, with up to approximately 35 dB sound pressure level at 3 kHz. A significant improvement in the workpiece surface was also observed with the adaptive control.},
  author       = {Håkansson, Lars},
  isbn         = {91-628-3356-1},
  keyword      = {Materiallära,Material technology,Metal Cutting,Lathe,Tool Vibration,Active Control,Adaptive Signal Processing,materialteknik},
  language     = {eng},
  pages        = {183},
  publisher    = {Division of Production and Materials Engineering, Lund University,},
  school       = {Lund University},
  title        = {Adaptive Active Control of Machine-Tool Vibration in a Lathe - Analysis and Experiments},
  year         = {1999},
}