常规雷达上飞机目标旋转部件回波调制特性分析

在分析常规雷达飞机目标旋转部件回波的数学模型的基础上,推导旋转部件调制回波及其回波幅度频谱的调制特性的参数模型,进一步明确以前文献中给出结论的使用条件,并分析旋转部件回波调制效应的观测应满足的条件以及部分桨叶遮挡对回波调制特性的影响.最后在不同的参数条件下进行仿真实验.实验表明,前述理论分析和参数模型是正确和有效的.

Analysis of modulation characteristics on return signals from aircraft rotating blades in the conventional radar

Aiming at the problem that radar echoes from some airborne targets contain modulation sections and airframe sections, we derive the parameter models for the spectrum characteristics of the modulation section from the rotating parts and its echo amplitude on basis of analysis of the echo mathematical model of the rotating parts, indicate the application conditions of some previous models in the literature, and analyze the observation conditions of the modulation effect as well as the influence on the modulation characteristics induced by partial blades sheltering. Simulation is performed in different parameter conditions, and the results show that the above-mentioned theoretical analysis and the modulation characteristic parameter models are reliable and effective.