Design of multi-axis micromotion system in TERS and its nonlinearity and crosstalk correction method
Design of multi-axis micromotion system in TERS and its nonlinearity and crosstalk correction method
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DOI：
10.1016/j.isatra.2022.10.047
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发表时间：
2023-05-12
期刊：
影响因子：
7.3
通讯作者：
Fan，Xian-guang
中科院分区：
文献类型：
--
作者：
Zhi，Yu-liang;Chen，Jian-sheng;Fan，Xian-guang
Tip-Enhanced Raman Spectroscopy (TERS) is an advanced analytical measurement technology combining Raman spectroscopy with Scanning Probe Microscopy, which can detect the molecular structure and chemical composition in micro-nano-scale. As an indispensable part, the micromotion system directly determines TERS spatial resolution. The existing multi-axis system is often composed of several single-axis nonlinear systems, which solves whole problems with a superposition idea of single-axis part. But the multi-axis crosstalk under an overall idea is not fully considered and will cause system uncooperative and even oscillational. Therefore, a multi-axis micromotion system in TERS and its correction method are proposed. The improved Duhem model, simple calculation without inversion, accurate matching and fast response, has been built for nonlinearity. And the feedforward decoupling method is designed for crosstalk, having a favorable multi-axis coordination, good error tracking and simplified controllers. Experimental results show that it can greatly correct the nonlinearity and crosstalk of multi-axis system simultaneously.
