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	Phonon-Enabled Carrier Transport of Localized States at Non-Polar Semiconductor Surfaces: A First-Principles-Based Prediction
	Han, D.; J. Bang; W. Y. Xie; V. Meunier and S. B. Zhang
	2016
发表期刊	Journal of Physical Chemistry Letters
卷号	7期号:18
摘要	A Hexapod precision positioning platform called the Secondary Mirror Adjustment Mechanism (SMAM) was designed to precisely adjust the second mirror of a large optical payload. The structure configurations were optimized based on the multi-objective function, and the errors of each strut and the upper (lower) hinges were distributed by the optimization algorithm. A kinematic model and a static flexibility model for the Hexapod platform were established, and the influences of main structure parameters on the mechanism performance were analyzed. Then, the positioning accuracy and anti-deformation indexes were put forward. By using the structural parameters as variables, the optimization functions were established, and two single-objective functions were optimized by the genetic algorithm. At the same time, a unified constraint function of weight factor was constructed, and the multi-objective function was also optimized by the genetic algorithm. Afterwards, a nonlinear optimized error distribution model was established, and it was used to distribute the errors for each strut and the upper (lower) hinges. Finally, by testing the performance indexes of a prototype, the efficiency of the proposed method was verified. The research results after optimization show that the positioning accuracy and the anti-deformation capacity are improved by 8.3% and 62.5%, respectively. The upper and lower hinge error bounds increase from 2.7 m to 6.3 m, and each strut error bound increases from 1.3 m to 3.2 m. Moreover, the relative positing accuracy and the static stiffness of Z axis are 0.6% and 41.14 N/m, respectively. The research in this paper improves the positioning accuracy and anti-deformation ability, and saves the design cycles and processing costs. 2016, Science Press. All right reserved.
文章类型	期刊
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56949
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Han, D.,J. Bang,W. Y. Xie,et al. Phonon-Enabled Carrier Transport of Localized States at Non-Polar Semiconductor Surfaces: A First-Principles-Based Prediction[J]. Journal of Physical Chemistry Letters,2016,7(18).
APA	Han, D.,J. Bang,W. Y. Xie,&V. Meunier and S. B. Zhang.(2016).Phonon-Enabled Carrier Transport of Localized States at Non-Polar Semiconductor Surfaces: A First-Principles-Based Prediction.Journal of Physical Chemistry Letters,7(18).
MLA	Han, D.,et al."Phonon-Enabled Carrier Transport of Localized States at Non-Polar Semiconductor Surfaces: A First-Principles-Based Prediction".Journal of Physical Chemistry Letters 7.18(2016).

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