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A variable stiffness mechanism for a movable magnet track of a linear motor stage

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Abstract

A movable magnet track for a linear motor stage changes the reaction force of a magnet track into vibration energy and reduces the stage base vibration. Although a movable magnet track can reduce the base vibration, the dynamic characteristic of the movable magnet track may be modified against the motion profile variation. This paper presents a variable stiffness mechanism for a movable magnet track of a linear motor stage. First, we introduce a passive Reaction force compensation (RFC) using a movable magnet track, and the Negative stiffness mechanism (NSM). Then, the variable stiffness mechanism using the NSM is used to reduce the stage base vibration. Lastly, simulations are performed using a linear motor motion stage with the NSM and the movable magnet track. The variable stiffness mechanism using the NSM not only reduces the reaction force but also adjusts the dynamic characteristic of the system.

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Authors and Affiliations

  1. Dept. of Mechanical Engineering, Soongsil University, Seoul, 06978, Korea

    Hyeong-Joon Ahn

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  1. Hyeong-Joon Ahn
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Correspondence to Hyeong-Joon Ahn.

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Recommended by Associate Editor Sungsoo Na

Hyeong-Joon Ahn received B.S., M.S. and Ph.D. degrees from Seoul National University, Korea in 1995, 1997 and 2001, respectively. Dr. Ahn is currently an Associate Professor at Depart. of Mechanical Eng., Soongsil University. Dr. Ahn’s research interests are in the area of mechatronics, sensors, actuators, control and precision machine design.

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Ahn, HJ. A variable stiffness mechanism for a movable magnet track of a linear motor stage. J Mech Sci Technol 31, 5203–5207 (2017). https://doi.org/10.1007/s12206-017-1013-4

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  • DOI: https://doi.org/10.1007/s12206-017-1013-4

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