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Design, Modeling, and Testing of a Novel XY Piezo-Actuated Compliant Micro-Positioning Stage

1
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China
2
National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
3
College of Communication Engineering, Army Engineering University of PLA, Nanjing 210007, China
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(9), 581; https://doi.org/10.3390/mi10090581
Received: 26 July 2019 / Revised: 29 August 2019 / Accepted: 30 August 2019 / Published: 31 August 2019
A novel decoupled XY compliant micro-positioning stage, based on a bridge-type amplification mechanism and parallelogram mechanisms, is designed in this paper. Analytical models of the bridge-type amplification mechanism and parallelogram mechanisms are developed by Castigliano’s second theorem and a Beam constrained model. The amplification ratio, input stiffness, and output stiffness of the stage are further derived, based on the proposed model. In order to verify the theoretical analysis, the finite element method (FEM) is used for simulation and modal analysis, and the simulation results indicate that the errors of the amplification ratio, input stiffness, and output stiffness of the stage between the proposed model and the FEM results are 2.34%, 3.87%, and 2.66%, respectively. Modal analysis results show that the fundamental natural frequency is 44 Hz, and the maximum error between the theoretical model and the FEM is less than 4%, which further validates the proposed modeling method. Finally, the prototype is fabricated to test the amplification ratio, cross-coupling error, and workspace. The experimental results demonstrate that the stage has a relatively large workspace, of 346.1 μm × 357.2 μm, with corresponding amplification ratios of 5.39 in the X-axis and 5.51 in the Y-axis, while the cross-coupling error is less than 1.5%. View Full-Text
Keywords: compliant mechanism; micro-positioning stage; Castigliano’s second theorem; beam constrained model; bridge-type amplification mechanism compliant mechanism; micro-positioning stage; Castigliano’s second theorem; beam constrained model; bridge-type amplification mechanism
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Zhang, Q.; Zhao, J.; Shen, X.; Xiao, Q.; Huang, J.; Wang, Y. Design, Modeling, and Testing of a Novel XY Piezo-Actuated Compliant Micro-Positioning Stage. Micromachines 2019, 10, 581.

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