基于阵列式压电振动频谱衰减的结冰区域定位研究
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TM934. 73 TH73

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结冰与防除冰重点实验室开放课题(IADL20190207)项目资助


The icing area localization method based on piezoelectric array vibration spectrum attenuation
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    摘要:

    为克服传统结冰传感器无法实现翼面大范围多区域结冰探测问题,提出了一种基于灰度重心法的多结冰区域定位方 法。 该方法通过采集结冰前后压电阵列的振动谱,提取频谱幅值衰减率作为定位特征值,并结合基于多点结冰概率检测的重构 算法和灰度重心法计算得到多个结冰区域的中心坐标,实现对平面或曲面上多个结冰区域的定位。 当扫频频率范围 0. 5 ~ 5 kHz 时,在 70 mm 直径的结冰条件下,铝板单结冰区域定位平均误差为 27. 4 mm,两结冰区域定位平均误差为 29. 04 mm;翼面 结冰横向定位平均误差为 22. 6 mm。 为了进一步提高定位精度,提出了一种基于小波包分解的敏感频带选择的特征提取方法。 优化后的实验结果表明,铝板单结冰区域定位精度提高了 34. 59% ,定位误差波动程度降低了 45. 67% ,翼面结冰的横向定位精 度提高了 54. 87% ,横向定位误差波动程度降低了 46. 63% ,实现了较高精度的多结冰区域定位探测,为面式结冰探测提供了一 种新思路。

    Abstract:

    To overcome the problem that traditional ice sensors cannot detect multiple icing areas in a wide range of airfoils, a multiple icing area localization method based on the grayscale centroid method is proposed. The vibration spectrum of piezoelectric array before and after icing is collected, and the attenuation rate of spectrum amplitude is extracted as the positioning eigenvalue. Combined with the reconstruction algorithm based on multi-point icing probability detection (RAMIPD) and the grayscale centroid method, the center coordinates of the multiple icing areas are calculated to get the positions of the icing regions on a plane or a curved surface. When the sweep frequency range is the full band of 0. 5~ 5 kHz and the diameter of icing area is 70 mm, the average positioning error of single icing area on the aluminum plate is 27. 4 mm. The average positioning error of two icing areas is 29. 0 mm. The average lateral positioning error of icing areas on the airfoil is 22. 6 mm. To improve the positioning accuracy, a feature extraction method for sensitive frequency band selection based on wavelet packet decomposition (WPD) is proposed. Experimental results show that the single icing area positioning accuracy on the aluminum plate is increased by 34. 59% , the fluctuation of the positioning error is reduced by 45. 67% , the lateral positioning accuracy on the airfoil is increased by 54. 87% , and the fluctuation of the lateral positioning error is reduced by 46. 63% . The proposed icing area localization method can detect the multiple icing areas with high precision and provide a new idea for icing area detection.

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葛俊锋,白鸿飞,毛俊伟,桂 康,叶 林.基于阵列式压电振动频谱衰减的结冰区域定位研究[J].仪器仪表学报,2022,43(10):86-97

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  • 在线发布日期: 2023-02-06
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