基于有限域实值MUSIC法的涡街信号处理方法  

Vortex signal processing method based on limited and real-valued MUSIC algorithm

作　　者：缪竟鸿[1,2] 邰雪凤 荣锋[1,2] 郭翠娟[1,2] 谢艳娜[2] 

机构地区：[1]天津工业大学电子与信息工程学院,天津300387 [2]天津工业大学天津市光电检测技术与系统重点实验室,天津300387

出　　处：《天津工业大学学报》2017年第3期65-69,75,共6页Journal of Tiangong University

基　　金：国家自然科学基金青年基金资助项目(61405144);天津市科委青年基金资助项目(15JCQNJC42100);天津市科技特派员项目(15JCTPJC56300)

摘　　要：针对涡街流量计高实时性、高精度的要求,提出一种基于有限域实值多重信号分类(multiple signal classification,MUSIC)法的涡街信号处理方法.该方法利用能量重心校正法对涡街信号幅度谱进行频率校正,确定频率搜索域;利用实值MUSIC法快速得到谱峰频率值,通过牛顿迭代法对谱峰频率值进行计算,以达到提高频率估计精度的目的.仿真结果表明:该改进方法的频率估计精度较MUSIC法提高了0.1%,实时性高,满足涡街流量计高精度与高实时性要求.Aiming at high precision and real-time requirements of the vortex flowmeter, a vortex signal processing method based on the limited and real-valued multiple signal classification （MUSIC） algorithm is proposed. The energy centrobaric correction method is applied for correcting the amplitude of the vortex signal so that the frequency search domain can be determined in which the spectral peak can be calculated quickly by using the real-valued MUSIC algorithm; the Newton iteration is adopted to improve the frequency estimation accuracy. The simulation results show that the proposed method has a better frequency estimation accuracy which is 0.1% higher than MU-SIC method with high real-time, thus it can meet the requirements of the vortex flowmeter.

关 键 词：有限域实值 涡街信号处理 实值多重信号分类 能量重心校正 牛顿迭代法 

分 类 号：TN911.7[电子电信—通信与信息系统] TH814[电子电信—信息与通信工程]