基于二维线阵和空间滤波器的结构冲击无波速定位方法
收稿日期: 2013-07-29
修回日期: 2013-11-08
网络出版日期: 2013-11-20
基金资助
国家杰出青年基金（51225502）；国家自然科学基金（51205189）；中国博士后科学基金（2012M510183）；中央高校基本科研业务费专项资金（NN2012051）；高等学校博士学科点专项科研基金（20123218120007）；江苏高校优势学科建设工程资助项目
Structure Impact Localization Method Based on 2D Linear Array and Spatial Filter Without Wave Velocity
Received date: 2013-07-29
Revised date: 2013-11-08
Online published: 2013-11-20
Supported by
National Science Fund for Distinguished Young Scholars (51225502); National Natural Science Foundation of China (51205189); China Postdoctoral Science Foundation (2012M510183); The Fundamental Research Funds for the Central Universities (NN2012051); Research Fund for the Doctoral Program of Higher Education of China (20123218120007); A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
复合材料在航空结构中的应用越来越广，但其遭受外界物体冲击后很容易在内部产生表面不可见损伤，所以对复合材料结构的冲击事件进行在线监测十分必要。基于压电传感器（PTZ）和Lamb波的冲击定位方法是目前的研究热点，但是Lamb波信号在复合材料结构中传播的各向异性给冲击定位带来了困难。本文将空间滤波器算法推广到复合材料结构的冲击监测应用中，研究了与波速无关的空间滤波器冲击定位原理，提出了基于二维线性压电传感器阵列和空间滤波器的结构冲击无波速定位方法。该方法首先采用Shannon连续复数小波变换提取并构建宽带冲击响应信号中的窄带Lamb波解析信号；然后利用波速无关的空间滤波器算法计算出结构冲击相对于各条线性压电传感器阵列的角度；最后使用冲击无波速定位公式计算出结构冲击的位置坐标。在碳纤维层合板上对该方法进行了实验验证。验证结果表明：该方法可以实现对复合材料结构的冲击进行不依赖信号传播速度的定位，定位误差小于1 cm。
刘彬 , 邱雷 , 袁慎芳 . 基于二维线阵和空间滤波器的结构冲击无波速定位方法[J]. 航空学报, 2014 , 35(6) : 1633 -1642 . DOI: 10.7527/S1000-6893.2013.0462
Composite materials are widely used in aerospace structures. But invisible damages will occur on them after suffering impact from external objects. Therefore, online structural health monitoring of impact events for composite structures is essential. One of the focuses of current research on impact location is based on piezoelectric sensors (PZTs) and Lamb wave. But the anisotropy of the Lamb wave in a composite structure makes it difficult to use it to locate the position of impact. In this paper, the algorithm of spatial filter for impact location is extended to composite structures and the theory of impact location by the spatial filter without the information of wave velocity is studied. The method of 2D linear PZTs array and spatial filter is proposed for impact location without wave velocity. Firstly, a narrowband Lamb analytic signal is extracted from the broadband impact response signal by a complex Shannon wavelet transform. Then, the angle of impact position relative to the array is calculated by the spatial filter without using the Lamb velocity. Finally, the impact position is calculated by the impact localization formula without velocity. This method is verified on a carbon fiber reinforced polymer. The verification results show that the method proposed can locate the structure impact without using the Lamb velocity in composite structures, and the error of localization is less than 1 cm.
[1] Ronald F G. A review of recent research on mechanics of multifunctional composite materials and structures[J]. Composite Structures, 2010, 92(12): 2793-2810.
[2] Zhu W Y, Xu X W. Experiment research on residual compressive strength and fatigue performance of composite laminates with low velocity impact damage[J]. Acta Materiae Compositae Sinica, 2012, 29(5): 171-178. (in Chinese) 朱炜垚, 许希武. 含低速冲击损伤复合材料层合板剩余压缩强度及疲劳性能试验研究[J]. 复合材料学报,2012, 29(5): 171-178.
[3] Yuan S F. Structural health monitoring[M]. Beijing: National Defense Industry Press, 2007: 205-231. (in Chinese) 袁慎芳. 结构健康监控[M]. 北京:国防工业出版社, 2007: 205-231.
[4] Frank S, Rolf J. Impact sensor network for detecting of hypervelocity impacts on spacecraft[J]. Acta Astronautica, 2007, 61(10): 901-911.
[5] Nivesrangsan P, Steel J A, Reuben R L. Source location of acoustic emission in diesel engines[J]. Mechanical Systems and Signal Processing, 2007, 21(2): 1103-1114.
[6] Ciampa F, Meo M. A new algorithm for acoustic emission localization and flexural group velocity determination in anisotropic structures[J]. Composites Part A: Applied Science and Manufacturing, 2010, 41(12): 1777-1786.
[7] Ciampa F, Meo M. Impact detection in anisotropic materials using a time reversal approach[J]. Structural Health Monitoring, 2011, 11(1): 43-49.
[8] Qiu L, Yuan S F, Su Y Z, et al. Multiple impact source imaging and localization on composite structure based on Shannon complex wavelet and time reversal focusing[J]. Acta Aeronautica et Astronautica Sinica, 2010, 31(12): 2417-2424. (in Chinese) 邱雷, 袁慎芳, 苏永振, 等. 基于Shannon复数小波和时间反转聚焦的复合材料结构多源冲击成像定位方法[J]. 航空学报, 2010, 31(12): 2417-2424.
[9] Feng Y M, Zhou L. Impact damage imaging for composites based on matching pursuit method[J]. Explosion and Shock Waves, 2012, 32(3): 259-266. (in Chinese) 冯勇明, 周丽. 基于匹配追踪算法的复合材料冲击损伤成像技术[J]. 爆炸与冲击, 2012, 32(3): 259-266.
[10] Hu N, Fukunaga H, Matsumoto S, et al. An efficient approach for identifying impact force using embedded piezoelectric sensors[J]. International Journal of Impact Engineering, 2007, 34(7): 1258-1271.
[11] Hideki S, Satoshi A. Identification of locations and force histories of multiple point impacts on composite isogrid-stiffened panels[J]. Composite Structures, 2009, 89(1): 1-7.
[12] Yan G, Zhou L. Impact load identification of composite structure using genetic algorithms[J]. Journal of Sound and Vibration, 2009, 319(3-5): 869-884.
[13] Yan G, Zhou L. Impact load identification for stiffened composite structure[J]. Acta Aeronautica et Astronautica Sinica, 2008, 29(5): 1150-1156. (in Chinese) 严刚, 周丽. 加筋复合材料结构的冲击载荷识别[J]. 航空学报, 2008, 29(5): 1150-1156.
[14] Leclerc J R, Worden K, Staszewski W J, et al. Impact detection in an aircraft composite panel—A neural-network approach[J]. Journal of Sound and Vibration, 2007, 299(3): 672-682.
[15] Ghajari M, Sharif K Z, Aliabadi M H. Impact detection using artificial neural networks[J]. Key Engineering Materials, 2012, 488-489: 767-770.
[16] Purekar A, Pines D, Sundararaman S, et al. Directional piezoelectric phased array filters for detecting damage in isotropic plates[J]. Smart Materials and Structures, 2004, 13(4): 838-850.
[17] Engholm M, Stepinski T, Olofsson T. Imaging and suppression of Lamb modes using adaptive beam forming[J]. Smart Materials and Structures, 2011, 20(8): 85024-85036.
[18] Wang Y, Yuan S F, Qiu L. Improved wavelet-based spatial filter of damage imaging method on composite structures[J]. Chinese Journal of Aeronautics, 2011, 24(5):665-672.
[19] Wang Y, Yuan S F, Qiu L. Improved spatial filter based damage imaging method on composite structures[J]. Acta Materiae Compositae Sinica, 2011, 28(1):186-193. (in Chinese) 王瑜, 袁慎芳, 邱雷. 基于改进空间滤波器的复合材料结构损伤成像方法[J]. 复合材料学报, 2011, 28(1): 186-193.
[20] Qiu L. Research on the piezoelectric sensors array based aircraft structural health monitoring and management system. Nanjing: College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, 2011. (in Chinese) 邱雷. 基于压电阵列的飞机结构监测与管理系统研究. 南京: 南京航空航天大学航空宇航学院, 2011.
[21] Qiu L, Yuan S F, Wang Q, et al. Design and experiment of PZT network-based structural health monitoring scanning system[J]. Chinese Journal of Aeronautics, 2009, 22(5): 505-512.
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