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Laser dot projection videogrammetry for vibration measurement and control of a piezoelectric flexible cantilever plate

机译：激光点投影摄影测量法用于压电挠性悬臂板的振动测量和控制

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摘要

A novel full-field non-contact vibration measurement method is investigated for a piezoelectric flexible cantilever plate, using laser dot-projection videogrammetry. Several laser dots are projected as marks for visual system. The three-dimensional coordinates of each mark are monitored by a binocular stereo vision system, composed of two cameras. After image processing, the vibration signal of the first bending mode is obtained. For the first torsional mode, two laser displacement sensors are utilized to detect the vibration. To suppress the residual vibration quickly, an adaptive nonlinear controller and a fuzzy tuning nonlinear controller are designed and adopted. To verify the investigated measurement and control methods, experiments are conducted by using a piezoelectric flexible cantilever plate experimental platform. The experimental results demonstrate that the investigated laser dot projection measurement method is effective for first bending vibration detection. Furthermore, compared with PD control, the adopted nonlinear algorithms have better damping performance, especially for small amplitude residual vibration. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：研究了一种新型的全场非接触式振动测量方法，该方法利用激光点投影视频摄影技术对压电挠性悬臂板进行了测量。投影了几个激光点作为视觉系统的标记。每个标记的三维坐标由双目立体视觉系统监控，该系统由两个摄像头组成。在图像处理之后，获得第一弯曲模式的振动信号。对于第一扭转模式，使用两个激光位移传感器来检测振动。为了快速抑制残余振动，设计并采用了自适应非线性控制器和模糊调谐非线性控制器。为了验证研究的测量和控制方法，使用压电挠性悬臂板实验平台进行了实验。实验结果表明，所研究的激光点投影测量方法对于首次弯曲振动检测是有效的。此外，与局部放电控制相比，所采用的非线性算法具有更好的阻尼性能，特别是对于小振幅残余振动。 （C）2019 Elsevier Masson SAS。版权所有。

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