机械源波形恢复方法的研究  

Study on Waveform Restoral of Mechanical Sources

作　　者：焦卫东[1] 常永萍[2] 

机构地区：[1]嘉兴学院机电工程学院,嘉兴314001 [2]嘉兴学院外国语学院,嘉兴314001

出　　处：《振动．测试与诊断》2006年第1期19-23,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:50205025);浙江省自然科学基金资助项目(编号:5001004)。

摘　　要：重点讨论了旋转机械源(包括振动激励源与噪声源)混合模式及源波形恢复问题。从分析旋转机械源的起源及传播过程出发,整体论述了其混合模式,给出了相应的数学模型。从源分离和波形恢复的角度,对该模型的实用背景进行了综合概括,提出了基于频域分段窄带化的机械源分离整体解决方案。机械声源分离试验结果也验证了该方法的有效性。This paper focused on such problems as mixing models of sources of rotation machines (including vibratory and acoustical sources) and their waveform restoral. Aimed at origin and propagation of mechanical sources, mixing models of mechanical sources were analyzed altogether, and their corresponding mathematic models were presented. Moreover, a summary to the application of these models to waveform restore was made. At last, a whole solution to separation of mechanical sources based on narrowing-band in frequency domain was proposed, and the methods were verified by results of separating mechanically a-coustical signals.

关 键 词：源分离 瞬时混叠 卷积混叠 冗余与分集 

分 类 号：TN912.3[电子电信—通信与信息系统]