Active Control of Machine-Tool Vibration in a CNC Lathe Based on an Active Tool Holder Shank with Embedded Piezo Ceramic Actuators
Blekinge Institute of Technology, Department of Telecommunications and Signal Processing2001 (English)Conference paper (Refereed) Published
In the turning operation chatter or vibration is a frequent problem affecting the result of the machining, and, in particular, the surface finish. Tool life is also influenced by vibration. Severe acoustic noise in the working environment frequently occurs as a result of dynamic motion between the cutting tool and the workpiece. These problems can be reduced by active control of machine-tool vibration. However, machine-tool vibration control systems are usually not applicable to a general lathe and turning operation. The physical features and properties of the mechanical constructions or solutions involved regarding the introduction of secondary vibration usually limit their applicability. An active control solution for a general lathe application has been developed. It is based on a standard Industry tool holder with an embedded piezo ceramic actuator and an adaptive feedback controller. The adaptive controller is based on the well known filtered-x LMS-algorithm. It enables substantial reduction of the vibration level by up to 40 dB at 3.4 kHz.
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IdentifiersURN: urn:nbn:se:bth-10272Local ID: oai:bth.se:forskinfo136D712B906764B8C1256C6A0035F04EOAI: oai:DiVA.org:bth-10272DiVA: diva2:838359
The 8th International Congress on Sound and Vibration