降噪技术在瞬态应变测试中的应用研究  

Research on De-noising Technology for Transient Strain Measurement

作　　者：黄海莹[1] 黎启胜[1] 何荣建[1] 

机构地区：[1]中国工程物理研究院结构力学研究所,四川绵阳621900

出　　处：《宇航计测技术》2007年第5期31-36,共6页Journal of Astronautic Metrology and Measurement

摘　　要：主要研究在瞬态环境下应变测试的干扰问题。文章从硬、软两个方面入手,讨论了在爆轰环境下出现的一些典型的干扰现象,分析了干扰源及干扰引入途径,并通过设计改进电路、系统的接地、屏蔽等方法提出了抗干扰措施。采用了小波分析和数字滤波等数字信号处理方法来解决信号的降噪问题。The nosing problems of transiant strain measurement are studied. Some typical interference phenomena emerged in detonation test are discussed by using the hardware meas- ures and methods of software processing. Simultaneously, the interference resources, included inducted approaches are analyzed. The anti-interference measures, the main of which are im- proving circuit, system grounding and shielding reasonably, etc, are put forward. Moreover, some digital signal processing methods which are wavelet analysis and digital filtering are used for signal de-noising.

关 键 词：瞬态应变 干扰分析 小波分析 数字滤波 

分 类 号：TN911.4[电子电信—通信与信息系统]