期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Improving accuracy of damage quantification based on two-level consistency control of PZT layers 被引量:1
1
作者 Yuanqiang REN Qiuhui XU Shenfang YUAN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第3期241-253,共13页
Structural health monitoring-based quantitative damage diagnosis technique plays a key role in real-time condition monitoring.Among the current research,piezoelectric(PZT)sensor and Guided Wave(GW)based damage quantif... Structural health monitoring-based quantitative damage diagnosis technique plays a key role in real-time condition monitoring.Among the current research,piezoelectric(PZT)sensor and Guided Wave(GW)based damage quantification methods are promising,which normally establish a calibration model between GW feature and damage degree by experiments on batch specimens,and then conduct the calibration model on the monitored specimen.However,the accuracy of PZT and GW based damage quantification is affected by dispersion introduced by sensor network performance,structural material,and damage propagation among the adopted batch specimens.For improving the accuracy of damage quantification,this paper adopts PZT layer as sensor network and creatively implements theoretical and experimental research on batch PZT layers consistency control.On one hand,a two-level consistency control method based on multidimensional features-Euclidean distance is proposed to ensure the performance consistency of PZT layers placed on different specimens.On the other hand,experimental research on typical aircraft lug structures is also carried out to evaluate the requirement on performance consistency of PZT layers when performing quantitative damage diagnosis,and further verify the proposed two-level consistency control method.Experimental results show that the accuracy of damage quantification raises by 38% when the dispersion of different PZT layers is controlled within 5%. 展开更多
关键词 Consistency control Guided waves PZT layer Quantitative damage diagnosis Structural health monitoring
原文传递
Preparation of Ni/PZT Core-shell Nanoparticles and Their Electromagnetic Properties
2
作者 范桂芬 XU Xing +3 位作者 WANG Xiaochuan LU Wenzhong LIANG Fei WANG Kai 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第1期9-14,共6页
The Ni nanoparticles coated with Pb(Zr,Ti)O3(PZT) were synthesized by a sol-gel method and in situ reaction. And their structure, oxidation resistance, and electromagnetic properties were investigated. The X-ray d... The Ni nanoparticles coated with Pb(Zr,Ti)O3(PZT) were synthesized by a sol-gel method and in situ reaction. And their structure, oxidation resistance, and electromagnetic properties were investigated. The X-ray diffraction patterns(XRD) exhibited that a small amount of impure phase characterized to Ni(OH)2 was detected from the ammonia-treated Ni nanoparticles and the ammonia-treated Ni nanoparticles coated with PZT. After being pre-treated with aqueous ammonia, the PZT coating layer was more uniform and about 10 nm in thickness. The oxidation resistance of the ammonia-treated Ni nanoparticles coated with PZT, compared with that of the non-treated ones, was improved by about 66 ℃. The PZT shell layer prepared by in-situ reaction can greatly reduce the dielectric constant and improve the natural resonance loss at high frequency, so as to obtain the optimal impedance matching performance of the electromagnetic wave transmission. 展开更多
关键词 Ni nanoparticles sol-gel method in situ reaction PZT coating layer electromagnetic property
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部