干扰抑制门在线谱提取中的应用  

Application of interference suppression gate in line spectrum extraction

作　　者：牛芳 惠娟[1,2,3] 赵安邦 NIU Fang;HUI Juan;ZHAO Anbang(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security,Harbin Engineering University,Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;National Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing,China State Shipbuilding Corporation Systems Engineering Research Institute,Beijing 100036,China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001 [2]哈尔滨工程大学海洋信息获取与安全工信部重点实验室,哈尔滨150001 [3]哈尔滨工程大学水声工程学院,哈尔滨150001 [4]中国船舶工业系统工程研究院水声对抗技术重点实验室,北京100036

出　　处：《振动与冲击》2019年第23期253-258,共6页Journal of Vibration and Shock

基　　金：水声对抗技术国防科技重点实验室开放基金(SSDKKFJJ-2018);水声技术重点实验室稳定支持课题(SSJSWDZC2018002);54所新技术研究高校合作项目课题;声纳技术重点实验室基金课题(614210902011906)

摘　　要：由于舰船辐射噪声和海洋环境噪声的复杂性,直接从舰船辐射噪声解调信号中提取线谱比较困难。为了降低线谱提取过程中宽带噪声干扰的影响,设计了一个干扰抑制门。对单频输入信号和谐波输入信号的仿真,验证了抑制算法的有效性,同时对干扰抑制门的信噪比增益进行了统计分析。对实测舰船辐射噪声数据处理,结果表明干扰抑制门的应用能有效降低信号中的宽带干扰,为线谱提取提供便利。从线谱中提取的螺旋桨轴频可作为舰船目标分类和识别的特征量。干扰抑制门算法亦可用于线谱检测。Due to complexity of ship radiated noise and marine environment noise,it is difficult to directly extract line spectra from demodulated signals of ship radiated noise.Here,an interference suppression gate was designed to suppress broadband noise interference in line spectrum extraction.Simulations for single-frequency input signal and harmonic input one verified the effectiveness of the suppression algorithm.Moreover,statistical analysis was performed for the output signal to noise ratio(SNR)gain of the interference suppression gate.The processing results of actual ship radiated noise data showed that application of interference suppression gate can effectively reduce broadband noise interference,and provide convenience for line spectrum extraction;the extracted propeller shaft frequency can be taken as a feature quantity for ship target classification and recognition;the interference suppression gate algorithm can also be applied in line spectrum detection.

关 键 词：干扰抑制门 线谱提取 轴频 舰船辐射噪声 

分 类 号：TB56[交通运输工程—水声工程]