双基推进剂包覆层界面脱粘敲击检测系统设计  

The System Design of Interface Debonding Tap Detection in Double Base Propellant Coatings

作　　者：张兴成 李艳军[1] 曹愈远[1] 宋甫成 赵杨超 ZHANG Xingcheng;LI Yanjun;CAO Yuyuan;SONG Fucheng;ZHAO Yangchao(Nanjing University of Aeronautics and Astronautics,Nanjing 210016)

机构地区：[1]南京航空航天大学,南京210016

出　　处：《宇航材料工艺》2021年第3期91-98,共8页Aerospace Materials & Technology

基　　金：国家自然科学基金(50705097);中国民航总局科技基金(MHRD07238);南京航空航天大学研究生开放基金(kfjj20200725)。

摘　　要：双基推进剂橡胶包覆层界面脱粘降低了推进剂工作性能,使其运行存在潜在的安全隐患。针对此问题,设计并开发了一套由信号处理组件、自动化控制组件和智能诊断组件构成的敲击检测系统,旨在通过自动化控制与智能敲击诊断技术相结合,更加全面的获取待测件的状态,提高检测的准确性和可靠性。实验结果表明,敲击检测系统可以识别橡胶包覆层脱粘缺陷,并且当敲击检测分辨率为3~10 mm时,脱粘缺陷检测准确率≥87.5%;BP神经网络隐含层神经元数设置6或7时,故障识别效果良好,K-means聚类算法对敲击检测数据故障确诊率≥90%。综上所述,敲击检测系统具有较高的检测分辨率和准确率,可以实现对双基推进剂包覆层粘接质量的客观评价。The interface debonding of the double-base propellant rubber coatings reduces the working performance of the propellant and makes a potential safety hazard to its operation.To solve this problem,a set of tap detection systems composed of signal processing components,automated control components and intelligent diagnostic components was designed and developed,aiming to obtain a more comprehensive acquisition of devices under test through the combination of automated control and intelligent tap diagnosis technology,and it improves the accuracy and reliability of detection.The results show the tap detection system can identify the debonding defects of the rubber coating,and when the tap detection resolution is between 3 to 10 mm,the detection accuracy of debonding defects is more than 87.5%.When the number of neurons in the hidden layer of the back propagation neural network is setted to 6 or 7,the fault recognition effect is good,and the fault diagnosis rate of K-means clustering algorithm to the tap detection data is more than 90%.In summary,the tap detection system has high detection resolution and accuracy,so it can realize the objective evaluation to the bonding quality of the double-base propellant coatings.

关 键 词：橡胶包覆层 敲击检测 界面脱粘 系统设计 自动控制 故障诊断算法 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]