摘要
太阳能飞机是清洁能源飞机的重要形式,为研究其电磁散射特性,以典型布局太阳能飞机为基础,建立某型双尾撑布局(模型A)和常规布局(模型B)电磁散射模型,采用物理光学法,计算不同状态的RCS曲线,研究RCS散射曲线的分布特点、俯仰角和频率的影响规律。结果表明,模型A的RCS曲线呈"十"字型,模型B的RCS曲线分布规律较为复杂,与飞机结构外形设计特点密切相关。俯仰角会引起散射曲线向内收敛,俯仰角增大时,模型A的前向角域RCS均值先不变后增加,而模型A的其余角域及模型B的RCS均值呈倒"V"型;频率增加时,RCS散射曲线有较小变化,频率增加时,模型A前向角域RCS均值减小,最大减小8.5026dB,模型A前向隐身性能较好。基于结果提出了两模型的隐身改进措施。
Solar-powered aircraft is an important form of clean energy aircraft. In order to study the electromagnetic scattering characteristics, based on the typical layout of solar-powered aircraft, the electromagnetic scattering models of a certain type of aircraft with twin-tail-boom layout(model A) and conventional layout(model B) were established. The RCS curves of different states were calculated by the Physical Optics method, and the distribution characteristics of RCS scattering curves, the influence of pitch angle and frequency were studied. The results show that the shape of the RCS curve of model A is crisscross, and the distribution of the RCS curve for model B is more complicated, and which is closely related to the design of aircraft structure layout. The scattering curves are converged inward with the variation of pitch angle. When pitch angle increases, the RCS mean values of model A in nose direction don’t change firstly then increase, and the RCS mean values in reminder directions of model A and the mean value of model B are in an inverted "V" shape. When the frequency increases, the RCS scattering curve has little change, the RCS mean values of model A in nose direction decrease with a maximum decrease value of 8.5026 dB, and model A has good forward stealth performance. Furthermore, the stealth improvement measures of the two models are proposed according to the research results.
作者
王菁
刘战合
苗楠
蒋宸霖
WANG Jing;LIU Zhan-he;MIAO Nan;JIANG Chen-lin(School of Aeronautic Engineering,Zhengzhou University of Aeronautics,Zhengzhou Henan 450046,China)
出处
《计算机仿真》
北大核心
2021年第11期42-46,503,共6页
Computer Simulation
基金
国家自然科学基金(11702255)
航空科学基金(2016ZA55001)
河南省科技攻关(212102210052)
郑州航空工业管理学院青年骨干教师资助计划(2017-12)。
关键词
太阳能飞机
电磁散射
隐身
雷达散射截面
飞行器
Solar-powered aircraft
Electromagnetic scatterings
Stealth
Radar cross section(RCS)
Aircraft
