NDLI: Development of an Active Vibration Isolation System Using Linearized Zero-Power Control With Weight Support Springs

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Hoque, Md. Emdadul Mizuno, Takeshi Kishita, Daisuke Takasaki, Masaya Ishino, Yuji
Copyright Year	2010
Abstract	This paper presents a hybrid vibration isolation system using linearized zero-power control with weight support springs. The isolation system, fundamentally, is developed by linking a mechanical spring in series with a negative stiffness spring realized by zero-power control in order to insulate ground vibration as well as to reject the effect of on-board-generated direct disturbances. In the original system, the table is suspended from the middle table solely by the attractive force produced by the magnets and therefore, the maximum supporting force on the table is limited by the capacity of the permanent magnets used for zero-power control. To meet the growing demand to support heavy payload on the table, the physical model is extended by introducing an additional mechanism-weight support springs, in parallel with the above system. However, the nonlinearity of the zero-power control instigates a nonlinear vibration isolation system, which leads to a deviation from zero compliance to direct disturbance. Therefore, a nonlinear compensator for the zero-power control is employed furthermore to the system to meet the ever-increasing precise disturbance rejection requirements in the hi-technology systems. The fundamental characteristics of the system are explained analytically and the improved control performances are demonstrated experimentally.
Starting Page	041006
Ending Page	041014
Page Count	9
File Format	PDF
ISSN	10489002
e-ISSN	15288927
Journal	Journal of Vibration and Acoustics
Volume Number	132
Issue Number	4
DOI	10.1115/1.4000968
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	2010-05-25
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Control equipment Control systems Design Electromagnets Force Magnetic levitation Magnets Permanent magnets Springs Stiffness Vibration isolation Weight (Mass)
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Mechanics of Materials Mechanical Engineering

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