Vibration control of milling machine by using auto-tuning magnetic damper and auto-tuning vibration absorber

Article type: Research Article

Authors: Nagaya, Kosuke^{a; *} | Kobayasi, Jyoji^a | Imai, Katuhito^a

Affiliations: [a] Department of Mechanical Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan

Correspondence: [*] Corresponding author. Tel.: +81 277 30 1563; Fax: +81 277 30 1599; e-mail: [email protected]

Abstract: This paper presents a method of micro-vibration control of milling machine heads by use of a vibration absorber. The principle used in this paper is different from that of usual absorbers. An auto-tuning vibration absorber is presented in which the absorber creates anti-resonance state. When the anti-resonance is used, the damping has to be significantly small, so it is difficult to suppress higher modal vibrations. In order to suppress higher modes, an auto-tuning magnetic damper is used. It damps higher modal vibrations, but it also increases the principal vibration. Then a method of optimal auto-tuning control is presented in which both principal and higher modal vibrations are suppressed. Experimental tests are carried out for an actual milling machine, and cutting tests are also performed.

Keywords: vibration control, milling machine, anti-resonance, absorber, magnetic damper, tuning, optimal control, adaptive control

DOI: 10.3233/JAE-2002-229

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 16, no. 1-2, pp. 111-123, 2002