多种模式的倾斜旋转机飞机的动态电磁散射模拟
Zhongyang Fei1, Yan Yang1, Xiangwen Jiang1
1National Key Laboratory of Helicopter Aeromechanics, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Sensors (Basel, Switzerland)
|September 9, 2023
概括
这项研究模拟了倾斜旋转机飞机的电磁散射,揭示了周期性雷达截面 (RCS) 变化,并通过微多普勒移动识别了隐形设计的飞行模式.
科学领域:
- 电磁散射是一种电子磁性散射.
- 航空航天工程是航空航天工程.
- 计算物理学的计算物理.
背景情况:
- 倾斜旋转机飞机表现出复杂的飞行动力学,影响其电磁散射特性.
- 了解雷达截面 (RCS) 对于飞机可检测性和隐形应用至关重要.
研究的目的:
- 为了研究倾斜旋转机飞机在不同飞行模式中的动态电磁散射.
- 分析飞行状态和散射机制之间的关系.
- 为倾斜旋转机飞机隐形设计提供见解.
主要方法:
- 动态模拟使用时间变化的网格方法来模拟飞机运动.
- 电磁散射计算采用射击和反射射线和均衍射理论.
- 分析微多普勒和逆合成光圈雷达 (ISAR) 图像,以了解散射机制.
主要成果:
- 动态RCS在直升机和飞机模式中显示周期性.
- 过渡模式导致显著的镜面反射,增加RCS高达36dB.
- 微多普勒转移模式与飞行时间,倾斜速度和波浪发生率相关,使实时状态识别成为可能.
结论:
- 倾斜旋转机飞机的飞行状态和模式可以通过分析微多普勒转移模式来确定.
- 根据飞行模式,飞机机身上的关键散射源的重要性有所不同.
- 这项研究通过确定关键的散射区域,有助于倾斜旋转机飞机的隐形设计.
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