舰船轴频电场基频线谱的模糊评判方法研究  

Detection of Line Spectrum of Fundamental Frequency on Shaft-Rate Electric Field of a Ship

作　　者：李松[1] 张春华 栾经德[1] 

机构地区：[1]海军装备研究院 [2]61741部队

出　　处：《兵工学报》2009年第12期1738-1742,共5页Acta Armamentarii

摘　　要：轴频电场是海水中航行舰船产生的物理场之一,它以螺旋桨轴转动速率为基频向外辐射,具有明显的线谱特征。为了提取其基频线谱,对信号进行了线谱检测,剔除掉了连续谱以及不符合线谱条件的频率点,根据轴频电场的特点,对剩余的线谱再进行模糊评判;根据轴频置信度判断基频线谱所在频率点。将该方法用于船模产生的轴频电场基频线谱的检测,取得了较好的效果。Shaft-rate electric field is one of the physical fields caused by navigating ships. Its funda mental frequency is the rate of propeller rotation and it has stable line spectrum. In order to acquire the line spectrum of fundamental frequency, continuous spectra and the unacceptable frequency points were ruled out, the remainders were verified by the fuzzy model; according to the credible degree of the shaft-rate frequency, the fundamental frequency was acquired. The proposed method used for detecting fundamental frequency line spectrum of the shaft-rate electrical field gains better effectiveness.

关 键 词：信息处理技术 舰船 轴频电场 基频 线谱检测 模糊评判 

分 类 号：TB559[理学—物理]