摘要
在理论分析的基础上,构造了基于λ水平能量聚点的目标辐射噪声线谱的特征量模型.在利用中值滤波去除信号功率谱中“平台型”的λ水平能量聚点后,计算其λ水平能量聚点作为拟线谱频率,通过拟线谱频率对应周期的整周期延时叠加突出线谱特征,以提高辐射噪声线谱的检测率.理论分析和对仿真信号的计算结果表明,该算法是有效的.
This paper establishes a model of line-spectrum for ship radiated-noise on the basis of theoretical analysis. By using the medium processing, the quasi-line-spectrum frequency was obtained after removing power gathering-point which has a shape of platform in the power spectrum of signal. To examine the quasi-line-spectrum frequency, the signal in time domain was added to its postponements of one or several periods which can be calculated from the quasi-line-spectrum frequency,and the detection of line-spectrum was fulfilled. The effectiveness of algorithm was verified by the theoretical analysis and digital simulation.
出处
《海军工程大学学报》
CAS
北大核心
2006年第6期45-48,共4页
Journal of Naval University of Engineering
关键词
模型
辐射噪声
λ水平能量聚点
线谱检测
model
radiated noise
power gathering-point onλ level
line-spectrum detection
