透波构件电性能修正补偿原理与加工修正量确定方法

项目名称： 透波构件电性能修正补偿原理与加工修正量确定方法

项目编号： No.50875035

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 盛贤君

作者单位： 大连理工大学

项目金额： 38万元

中文摘要： 飞行器天线罩是典型的透波材料构件，为保证高速飞行器的制导精度，成型加工后的透波材料构件必须按照其电性能要求进行精密加工修正。本项目针对目前天线罩等透波构件电性能误差补偿的修磨加工所面临的技术瓶颈问题，对透波构件电性能修正补偿原理与加工修正量确定方法展开深入的研究。采用现代蒙特卡罗法建立由透波构件几何形状数据及远场电性能反求修磨补偿量的数学模型；通过综合应用平面波谱和口径积分理论进行天线近场计算、合理规划远场辐射等效源区域以及引入并行算法，研究适用面广、高精度、高效率的透波构件电性能正向计算的新方法，在此基础上提出加工修正量的确定方法；通过典型试件实际修整加工和电性能参数测试实验，对所研究的加工修正量确定方法进行验证。为实现以提高飞行器透波构件电性能为目标的可控修正加工提供理论依据，对于提高我国高速飞行器透波构件的制造水平，加速我国航天和国防事业的发展具有重要理论意义和实用价值。

中文关键词： 透波构件；磨削；电性能；补偿

英文摘要： Aircraft radome is a typical microwave-transparent material component. In order to ensure the guidance precision of aircraft, it has to be machined precisely according to the requirement of the electrical performance. This project researches on the compensation principle of the electrical performance and the determination method of machining area and allowance for the microwave-transparent material component, in view of the “ottle-neck”problem in grinding for error compensation of the electrical performance of the microwave-transparent material component. Firstly, Monte Carlo method is used to establish the reverse mathematical model of grinding compensation quantity, based on the geometry data and the far-field performance of the microwave-transparent material component. Secondly, the aperture integration (AI) and plane wave spectrum (PWS) theory are applied to compute near-field and plan far-field radiation equivalent source region. Through this method and parallel algorithms, a new forward calculation algorithm with wide applicability, high precision and efficiency is suggested for the electrical performance of the microwave-transparent material component. Then, the determination method of machining area and allowance is proposed. At last, the determination method of machining area and allowance is validated by machining and modifying the typical specimen and testing its electrical performance. The project provides a theoretical basis for the controlled machining and modifying aiming at enhancing the electrical performance of the microwave-transparent material component, It is also of great significance to improve the manufacturing level of the microwave-transparent material component and accelerate the development of astronautics and national defence.

英文关键词： microwave-transparent material component; grind; electrical performance; compensation