激光与光电子学进展, 2021, 58 (4): 0411001, 网络出版: 2021-02-04
基于摄影测量和ERA改进算法的叶片模态辨识方法 
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Modal Identification Method of Blade Based on Photogrammetry and Improved ERA
图 & 表
图 3. 摄影测量实验图。(a) 双目摄像测量仪; (b) 实验约束状态; (c) 9号编码标志识别图; (d) 风力机叶片
Fig. 3. Experiment configuration. (a) Binocular camera measuring instrument; (b) experimental constraint state; (c) identification of No.9 coded marker; (d) wind turbine blade
图 5. 编码标志的振动位移曲线。(a) X方向; (b) Y方向; (c) Z方向
Fig. 5. Vibration displacement curves of coded marker. (a) X direction; (b) Y direction; (c) Z direction
图 6. 传统的ERA稳定图。(a) X方向; (b) Y方向; (c) Z方向
Fig. 6. Stabilization diagrams for traditional ERA. (a) X direction; (b) Y direction; (c) Z direction
图 7. SVD去噪声后的ERA稳定图。 (a) X方向; (b) Y方向; (c) Z方向
Fig. 7. Stabilization diagrams after noise removal by SVD. (a) X direction; (b) Y direction; (c) Z direction
图 8. 阻尼频率关系图。(a) X方向; (b) Y方向; (c) Z方向
Fig. 8. Diagrams of damping and frequency. (a) X direction; (b) Y direction; (c) Z direction
图 9. 改进后的ERA稳定图。 (a) X方向; (b) Y方向; (c) Z方向
Fig. 9. Stabilization diagrams for improved ERA. (a) X direction; (b) Y direction; (c) Z direction
图 10. 归一化的奇异值。 (a) X方向; (b) Y方向; (c) Z方向
Fig. 10. Normalized singular values. (a) X direction; (b) Y direction; (c) Z direction
表 1叶片固有频率识别结果
Table1. Natural frequency identification results of blades unit: Hz
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表 2叶片固有频率识别误差
Table2. Natural frequency identification error of blades unit: %
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全伟铭, 郭迎福, 王文韫, 邹龙洲. 基于摄影测量和ERA改进算法的叶片模态辨识方法[J]. 激光与光电子学进展, 2021, 58(4): 0411001. Weiming Quan, Yingfu Guo, Wenyun Wang, Longzhou Zou. Modal Identification Method of Blade Based on Photogrammetry and Improved ERA[J]. Laser & Optoelectronics Progress, 2021, 58(4): 0411001.
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