著者

水野 毅 神谷 哲朗

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2005, no.5, pp.481-482, 2005-09-18

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The amplitude of negative stiffness of zero-power magnetic suspension depends on the gap between the electromagnet and the suspended object. It is a problem when such suspension is used in an active vibration isolation system because its stiffness against direct disturbance becomes lower when load is applied to the isolation table. This paper presents a nonlinear feedback control scheme for keeping the amplitude of negative stiffness constant. The efficacy of the derived control scheme is demonstrated experimentally.