Self-sensing Active Vibration Control using the Moving-Coil-Type Actuator

[+] Author and Article Information
Y. Okada, K. Matsuda, H. Hashitani

Department of Mechanical Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, 316 Japan

J. Vib. Acoust 117(4), 411-415 (Oct 01, 1995) (5 pages) doi:10.1115/1.2874472 History: Received March 01, 1993; Online February 26, 2008


Active vibration control requires a velocity signal which is fed back to the force actuator to produce the damping force to the structure. Usually a gap sensor is used to detect the displacement and a differentiator is needed to produce the velocity signal. Moreover, it is very difficult to install the sensor at the same position of the actuator. Setting the gap sensor close to the magnetic actuator may cause an undesirable interaction between them. Sometimes there is no space for installing the sensor. This paper introduces a method of using a moving-coil-type actuator as a two-port sensing and driving device. Four types of velocity identification algorithms are tested and their capability of reducing structural vibrations is compared.

Copyright © 1995 by The American Society of Mechanical Engineers
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