双旋翼直升机旋翼的微多普勒特性分析

摘要

目前，国内外对双旋翼直升机的微多普勒特性研究相对还很少。建立了直升机旋翼回波的微多普勒模型，并基于该模型，分别计算了共轴式、横列式、纵列式以及交叉式双旋翼直升机的微多普勒。研究结果表明，不同种类的双旋翼直升机旋翼的微多普勒特性不同，通过对双旋翼直升机旋翼的微多普勒进行分析，可以对双旋翼直升机进行初步分类，为下一步双旋翼直升机的微多普勒识别提供了参考和借鉴。%At present,the study of micro-doppler of a double-blade helicopter’s rotor blades at home and abroad is lack. In this paper,a micro-doppler model of a helicopter rotor is established. Based on the model,the micro -doppler of coaxial helicopter’s rotor blades,horizontal -modal helicopter’s rotor blades,tandem helicopter’s rotor blades and cross-modal helicopter’s rotor blades is calculated. The results show that the micro-doppler of different type of double-blade helicopter’s rotor blades is different,and the type of a double-blade helicopter can be classified primarily through analyzing the micro-doppler of a double-blade helicopter’s blades,which provided some reference for double-blade helicopter identification by micro-doppler.