| 一种计算隐身飞行器外形RCS的高精度快速算法 |
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| 引用本文： | 王明亮,高正红.一种计算隐身飞行器外形RCS的高精度快速算法[J].航空计算技术,2008,38(2):1-5,9. |
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| 作者姓名： | 王明亮 高正红 |
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| 作者单位： | 西北工业大学,翼型、叶栅空气动力学国防科技重点实验室,陕西,西安,710072 |
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| 摘 要： | 针对目前隐身飞行器外形雷达散射截面(RCS)难以准确计算的问题,提出了一种基于目标外形几何特征和矩量法的飞行器RCS算法.通过对矩量法阻抗矩阵元的理论分析,研究了物面感应电流随散射体表面曲率的变化规律,指出感应电流之间的耦合已成为影响隐身飞行器物面电流分布的重要因素,并且指出根据飞行器物面曲率分布可以预知强的感应电流耦合区域,利用这些强的电流耦合能够组成稀疏化的阻抗矩阵,从而实现飞行器RCS的快速求解.以金属双弧柱和典型隐身飞机外形为例,分析验证了物面曲率几何信息对计算结果精度的影响以及在提高计算效率方面的作用.数值结果表明该方法保持了与传统矩量法基本一致的计算精度,但计算时间仅为矩量法的7.2%.
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| 关 键 词： | 雷达散射截面 几何特征 矩量法 阻抗矩阵 |
| 文章编号： | 1671-654X(2008)02-0001-05 |
| 修稿时间： | 2007年11月9日 |
A Highly Accurate and Fast Algorithm for Calculating RCS of Stealth Aircraft Configuration |
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| WANG Ming-liang,GAO Zheng-hong.A Highly Accurate and Fast Algorithm for Calculating RCS of Stealth Aircraft Configuration[J].Aeronautical Computer Technique,2008,38(2):1-5,9. |
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| Authors: | WANG Ming-liang GAO Zheng-hong |
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| Abstract: | It is very difficult that accurately calculating the radar cross section(RCS)of stealth aircraft configurations.In order to solve the problem,a new algorithm for calculating RCS is presented based on the geometrical characteristic of target aircraft configurations and the method of moment(MOM).The impedance element in the MOM algorithm is analyzed,and the general rule between the surface curvature of scatterer and induced surface currents is researched.It is pointed out that the induced current distribution... |
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| Keywords: | radar cross section geometrical characteristic the method of moment impedance matrix |
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