旋翼叶片回波自由空间建模及微动特性分析  

Free space modeling and analysis of fretting characteristics of rotor blade echoes

作　　者：龙铭 夏赛强 吕明久[1] 陈文峰[1] 杨军[1] LONG Ming;XIA Saiqiang;LYU Mingjiu;CHENWenfeng;YANG Jun(Air Force EarlyWarning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空天预警研究学报》2022年第6期391-397,402,共8页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

基　　金：国家自然科学基金资助项目(61671469)。

摘　　要：针对旋翼叶片常规回波建模因简化叶片姿态变化对回波的影响造成仿真结果与实际不符的问题,基于旋翼叶片散射点散射系数和分布情况,通过引入球坐标系与三维笛卡尔坐标系转换,实现了自由空间下旋翼叶片雷达回波散射点模型的构建;然后从理论上分析了旋翼叶片在三个维度偏转下的微动特性.仿真结果验证了理论分析的正确性与可行性.该模型的建立完善了旋翼叶片回波模型理论,对旋翼目标的探测识别领域具有一定的理论与应用价值.In order to solve the problem of inconsistency between simulation results and actual results caused by simplifying the influence of blade attitude changes on conventional echo modeling of rotor blades,based on the scattering coefficient and distribution of rotor blade scattering points,this paper introduces the transformation between spherical coordinate system and three-dimensional Cartesian coordinate system to construct the scattering point model of rotor blade radar echo in free space,and then theoretically analyzes the fretting characteristics of rotor blades under three deflection dimensions.The simulation results verify the correctness and feasibility of the theoretical analysis.The establishment of this model improves the theory of rotor blade echo model and has certain theoretical and application value in the field of detection and recognition of rotor targets.

关 键 词：旋翼目标 微动特征 球坐标系 散射点模型 

分 类 号：TN95[电子电信—信号与信息处理]