【作者】 杨鑫； 陈睿； 周丽玲； 陶婷婷； 赵延文；

【Author】 Yang Xin;Chen Rui;Zhou Liling;Tao Tingting;Zhao Yanwen;State Key Laboratory of Intelligent Vehicle Safety Technology;China Automotive Engineering Research Institute Co.,Ltd;University of Electronic Science and Technology of China;

【机构】 智能汽车安全技术全国重点实验室； 中国汽车工程研究院股份有限公司； 电子科技大学；

【摘要】 本文提出了一种基于Spline插值的球面近场测量截断误差抑制方法。本文基于Spline插值对截断区域近场数据做外插,使得近场在截断边界拥有C~2连续性,抑制截断误差;同时通过添加近场约束条件保证插值后截断区域近场不发散。数值算例表明,对比传统的Zero-padding、Last Value等近场预处理策略,本文提出的方法有更好的截断误差抑制效果,远场方向图相对误差最大为-33.38 dB。更多还原

【Abstract】 This paper proposes a spline interpolation-based method to suppress truncation errors in spherical nearfield measurements.By applying spline interpolation to extrapolate near-field data in truncated regions,the proposed method ensures C~2-continuity at truncation boundaries to mitigate Gibbs-induced errors.Meanwhile,the proposed scheme incorporates additional near-field constraints to prevent divergence in extrapolated near-field distributions.Numerical simulations demonstrate that the method achieves superior truncation error suppression in comparison to the conventional preprocessing strategies such as Zero-padding and Last Value,with the maximum relative error in reconstructed far-field patterns reduced to-33.38 dB.更多还原