Adaptive Active Control of Machine-Tool Vibration In a Lathe
Blekinge Institute of Technology, Department of Signal Processing1998 (English)In: International Journal of Acoustics and Vibration, ISSN 1027-5851, Vol. 3, no 4, 155-162 p.Article in journal (Refereed) Published
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. With proper machine design, i.e. improved stiffness of the machine structure, the problem of relative dynamic motion between cutting tool and workpiece may be partially solved. However, by active control of machine-tool vibration, a further reduction of the dynamic motion between cutting tool and workpiece can be achieved. It was found that adaptive feedback control of tool vibration in the cutting speed direction, based on the filtered-x LMS-algorithm, enables a reduction in vibration, by up to 40 dB at 1.5 kHz, and by approximately 40 dB at 3 kHz. It was also observed that the introduction of leakage in the filtered-x LMS-algorithm improved the stability properties of the feedback control system. A significant improvement in the workpiece surface was observed and a substantial improvement in the acoustic noise level was obtained with adaptive control.
Place, publisher, year, edition, pages
1998. Vol. 3, no 4, 155-162 p.
IdentifiersURN: urn:nbn:se:bth-9840Local ID: oai:bth.se:forskinfo840A52387C3D2DD0C1256C6A003FBF71OAI: oai:DiVA.org:bth-9840DiVA: diva2:837801