【摘要】 针对叶片结构参数影响周期性运动部件调制(PMPM)频谱分量分布规律问题,在对旋转叶片组建立电磁散射模型和进行试验测量基础上,分析了叶片长度、倾斜角和扭角等叶片结构参数对PMPM频谱分量分布规律影响。结果表明:叶片长度主要影响PMPM频谱在频率轴上的分布范围;叶片倾斜角使PMPM频谱呈不对称分布;叶片扭角使PMPM频谱不对称分布程度进一步加剧。更多还原

【Abstract】 In order to reveal spectral components distribution characteristic of the periodically moving parts modulation (PMPM) affected by blade structure parameters, the effects of the blade structure parameters such as length, pitch and twist angle on the PMPM spectral components distribution is analyzed in this paper. The experimental results show that the blade length mainly affects the PMPM spectral distribution range on the frequency domain, the blade pitch angle makes the PMPM spectral distribution asymmetrical, and the blade twist makes such situation more severely.更多还原