摘要
就信号处理中的Ｗｉｇｎｅｒ方法及其螺旋桨噪声试验中的应用问题作了初步探讨。简要地介绍了Ｗｉｇｎｅｒ分布的基本概念及其物理意义，结合模型试验和数值计算给出了螺旋桨噪声的时－频联合分布及其在时域和频域中的能量分布。结果表明：Ｗｉｇｎｅｒ谱对于螺旋桨噪声的时域分析、线谱和非定常噪声的测试分析是十分有效的。
An initial study on the Wigner method for signal processing and its application to the propeller noise test are described according to the model tests and the caculations, which includes the essential concept of Wigner distribution and its physical significance, the time frequency joint distribution of propeller noise and the energy distributuion both in time domain and frequency domain. The result of the study shows that Wigner Spectrum is very effective in the analysis of the time domain of propeller noise, linear spectrum and the test of inconstant noise.
关键词
螺旋桨
噪声测量
船舶
Wigner谱
measurement of propeller noise, data processing, analysis of the characteristics of time domain, signal process
