Research on Auto-detection for Remainder Particles of Aerospace Relay Based on Wavelet Analysis
Aerospace relay is one kind of electronic components which is used widely in national defense system and aerospace system. The existence of remainder particles induces the reliability declining, which has become a severe problem in the development of aerospace relay. Traditional particle impact noise detection (PIND) method for remainder detection is ineffective for small particles, due to its low precision and involvement of subjective factors. An auto-detection method for PIND output signals is proposed in this paper, which is based on direct wavelet de-noising (DWD), cross-correlation analysis (CCA) and homo-filtering (HF), the method enhances the affectivity of PIND test about the small particles. In the end, some practical PIND output signals are analysed, and the validity of this new method is proved.
作 者： GAO Hong-liang ZHANG Hui WANG Shu-juan 作者单位： Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China 刊 名： 中国航空学报（英文版） ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS 年，卷(期)： 2007 20(1) 分类号： V2 关键词： aerospace relay remainder particles PIND wavelet analysis