Dataset on capability of suppressing background noise and anti-tilting of divided-aperture differential confocal Raman microscopy system

Su, Yunhao; Wu, Hanxu; Qiu, Lirong; Ni, He; Xu, Ke-Mi; Zhao, Wenguang

doi:10.1016/j.dib.2021.107132

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…As research in micro and nano-processing inspection continues to deepen, there is a growing need for precise imaging in complex testing environments involving samples with intricate compositions and structures [5][6] . Addressing the challenge of non-uniform reflection perturbation and noise perturbation resistance is crucial for improving existing confocal micro-imaging technology [7] . This paper proposes a non-uniform reflection suppression differential confocal microimaging method based on the existing technology.…”

Section: Introductionmentioning

confidence: 99%

Differential confocal microimaging with non-uniform reflection suppression

xiang,

Xie,

Cui

et al. 2024

International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023)

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A novel method for suppressing non-uniform reflection in differential confocal microimaging is proposed in this paper. The method is based on the differential confocal optical path and aims to eliminate the influence of non-uniform reflection perturbation on the surface contour imaging of highly stepped samples. This is achieved by dividing the squared difference between the pre-focus and post-focus signals of the differential confocal by the larger value of the squared pre-focus and post-focus signals. The effectiveness of the proposed method is demonstrated through theoretical analysis, simulation, and experimental verification. The results show that the method can successfully realize height imaging of height step samples. It is found that non-uniform reflection perturbation only affects the edge overshoot and position of the height profile imaging curve. This method can achieve high-precision, high-efficiency, and non-contact measurement of step samples with non-uniform reflection disturbances. This has significant implications for various applications requiring accurate surface contour imaging.

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Section: Introductionmentioning

confidence: 99%

Differential confocal microimaging with non-uniform reflection suppression

xiang,

Xie,

Cui

et al. 2024

International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023)

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“…The proposed control includes a relay position error for friction compensation and a saturated nonlinear function for faster transient with bounded input. A model-free saturated output feedback control (Su et al, 2021) is proposed for positioning motion systems with friction and actuator constraints, using a filter-based output feedback PD control methodology with a robust relay term. Nath and Chatterjee (2016) have used an acceleration feedback controller to quench the vibration generated by friction.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of velocity feedback control for suppression of the friction-induced oscillation due to mode-coupling instability in a two degrees-of-freedom mechanical system

Kumar

Malas

2023

Journal of Vibration and Control

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The present article focuses on suppressing mode-coupling instability in frictional systems, which can cause unwanted vibrations such as squeal in braking systems. Mode-coupling instability occurs when two or more modes of a system approach each other. This article proposes the use of resonant velocity feedback control to eliminate friction-induced oscillations generated by mode-coupling instability. A two degree-of-freedom linear model is used to capture the instability due to friction-induced mode coupling. The efficacy of the control is demonstrated through linear stability analysis, and by optimizing control parameters using pole crossover method to minimize the transient time of the response. The robustness analysis demonstrates the ability of the control to effectively mitigate the instability even under parametric perturbations. The controlled system is simulated in MATLAB Simulink to validate analytical results. The effects of time delay, which is commonly present in feedback systems, are also investigated. Finally, the effectiveness of the control is studied in the presence of nonlinearity in the system. The nonlinear dynamics are analyzed by creating bifurcation diagrams with different bifurcation parameters.

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Dataset on capability of suppressing background noise and anti-tilting of divided-aperture differential confocal Raman microscopy system

Cited by 2 publications

References 5 publications

Differential confocal microimaging with non-uniform reflection suppression

Differential confocal microimaging with non-uniform reflection suppression

Efficacy of velocity feedback control for suppression of the friction-induced oscillation due to mode-coupling instability in a two degrees-of-freedom mechanical system

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