Control- performance improvement for magnetic fluid type semi-active damper

Issue title: Proceedings of the tenth International Symposium on Applied Electromagnetics and Mechanics ISEM-Tokyo

Article type: Research Article

Authors: Nakagawa, Toshiko^a | Itoda, Koji^{a; *} | Furukawa, Tadashi^a | Futami, Shigeru^b

Affiliations: [a] Tokyo Denki University, Tokyo, Japan | [b] Yasukawa Electric Corporation, Japan

Correspondence: [*] Corresponding author: Koji Itoda, Tel.: +81 3 5280 3181 (ext.2137); Fax: +81 3 5280 3573; E-mail: 00gme06@ed.cck.dendai.ac.jp.

Abstract: In the previous paper [1], a novel type of semi-active damper that is composed of a cylinder injected with Magnetic Fluid (M.F.) and a magnetic flux controller was proposed for improving the ride comfort of trains. In this paper, at first, a modified model considering nonlinear characteristic of M.F. such as a Non-Newtonian-Fluid is proposed. Next, in order to enhance the control effects, two kinds of improvements are made in the semi-active damper. One is to change the voltage control input to an electromagnet into the current control input. The other is to expand the control range for the M.F. damper by means of feeding a bias current to the electromagnet. Finally, the effects of the improved semi-active damper are shown by various digital simulations and vibration experiments.

DOI: 10.3233/JAE-2002-307

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 13, no. 1-4, pp. 59-64, 2002