This paper presents the design of a novel flexure–based vertical (or Z–axis) nanopositioning stage driven by a piezoelectric actuator (PZT), which is capable of executing large travel range. The proposed stage consists mainly of a hybrid displacement amplification mechanism (DAM), a motion guiding mechanism, and a decoupling mechanism. The hybrid DAM with amplification ratio of 12.1 is developed to transfer the transverse motion of the PZT actuator into the vertical motion. The motion guiding mechanism is introduced to avoid cross coupling at the output end. The decoupling mechanism can significantly reduce the cross coupling at the driving end to protect the PZT. The stiffness and dynamics of the proposed stage are improved by these mechanisms. Analytical modeling and finite element analysis (FEA) are then adopted to optimize dimensions of the stage. Finally, a prototype of the stage is fabricated and tested for verification. The results of static and dynamic tests show that the proposed stage is capable of vertical travel range of 214 μm with resolution of 8 nm, and the first two resonance frequencies are 205 Hz and 1206 Hz, respectively. Cross coupling tests under various lateral loads (0 g–1000 g) show that the maximum variances of the lateral and angular cross couplings are less than 0.78 μm and 95 μrad, respectively, indicating good decoupling capability. In addition, the low–profile structure of the stage is well suited to be used in limited vertical space.
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October 2015
Research Article|
October 15 2015
A novel flexure-based vertical nanopositioning stage with large travel range
Xiaobo Zhu;
Xiaobo Zhu
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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Xiao Xu;
Xiao Xu
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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Zhijie Wen;
Zhijie Wen
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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Jiaqi Ren;
Jiaqi Ren
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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Pinkuan Liu
Pinkuan Liu
a)
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering,
Shanghai Jiao Tong University
, Shanghai 200240, People’s Republic of China
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a)
Author to whom correspondence should be addressed. Electronic mail: pkliu@sjtu.edu.cn
Rev. Sci. Instrum. 86, 105112 (2015)
Article history
Received:
April 28 2015
Accepted:
September 29 2015
Citation
Xiaobo Zhu, Xiao Xu, Zhijie Wen, Jiaqi Ren, Pinkuan Liu; A novel flexure-based vertical nanopositioning stage with large travel range. Rev. Sci. Instrum. 1 October 2015; 86 (10): 105112. https://doi.org/10.1063/1.4932963
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