基于简化多重分形谱算法的声信号预警识别
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摘要
针对目前常用多重分形谱算法运算量大,难以用于实际目标识别的现状,提出基于简化多重分形谱算法的声信号预警识别方法。该方法计算时间短,所需样本量少,误判率低,在信噪比较低时预警识别综合性能高于目前常用的过零率检测方法。
A tank-radiated noise identification method based on simplified multi-fractal spectrum to solve the problem of large calculation amount of the present acoustic passive identification method for early warning was proposed in this paper.The experimental results indicated that the performance of early alarming of this method was better than zero-pass rate analyzing method for its less sampling number and lower error rate under low SNR.
A tank-radiated noise identification method based on simplified multi-fractal spectrum to solve the problem of large calculation amount of the present acoustic passive identification method for early warning was proposed in this paper.The experimental results indicated that the performance of early alarming of this method was better than zero-pass rate analyzing method for its less sampling number and lower error rate under low SNR.
引文
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[2]章新华,张晓明,林良骥.船舶噪声的混沌现象研究[J].声学学报,1998,23(2):134-140.ZHANG Xinhua,ZHANG Xiaoming,LIN Liangji.Re-searches on chaotic phenomena of noises radiated fromships[J].Acta Acustica1998,23(2):134-140.
[3]高翔,陆估人,陈向东.舰船辐射噪声的分形布朗运动模型[J].声学学报,1999,26(1):19-28.GAO Xiang,LU Jiren,CHEN Xiangdong.Fractal brown-ian motion model of ship radiated noise[J].Acta Acusti-ca,1999,26(1):19-28.
[4]周越,刘勋,相敬林,等.船舶辐射噪声的模糊神经网络分类[J].电子科学学刊,2000,22(5):6.ZHOU Yue,LIU Xun,XIANG Jinglin,et al.Classifica-tion of the radiated noise of the ship by the fuzzy neuralnetwork[J].Journal of Electronics&Information Tech-nology,2000,22(5):6.
[5]丁庆海.混沌、分形和小波理论在被动声信号特征提取中的应用[J].声学学报,1999,24(2):197-203.DING Qinghai.Application of the chaos,fractal andwavelet theories to the feature extraction of passive a-coustic signa[J].Acta Acustica,1999,24(2):197-203.
[6]陆扬.水中目标辐射噪声非线性特征提取研究[D].哈尔滨:哈尔滨工程大学,2006.
[7]包永强,赵力,邹采荣,等.噪声环境下语音分形特征的提取和分析[J].电子与信息学报,2007,29(3):585-588.BAO Yongqiang,ZHAO Li,ZOU Cairong.The abstrac-tion and analysis of fractal characteristic of noisy speech[J].Journal of Electronics&Information Technology,2007,29(3):585-588.
[8]高安秀树.分数维[M].北京:地震出版社,1989.
[9]赵健,李雷,蒲小清.分形理论在信号处理中的应用[M].北京:清华大学出版社,2008.
[10]Kim H S,Eykholt R,Salas J D.Nonlinear Dynamics,Delay Times and Embedding Windows[J].Physica D,1999(127):48-60.
[11]Karim Vibe,Jean-Marc Vesin.On Chaos DetectionMethods[J].International Journal of Bifurcation andChaos,1996,6(3):Sano 529-543P.
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