电磁散射测试的可重构绳系并联支撑机构

柳汀; 林麒; 刘震; 王晓光; 吴惠松; 许勇刚

doi:10.7527/S1000-6893.2023.28658

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DOI: https://doi.org/10.7527/S1000-6893.2023.28658

电磁散射测试的可重构绳系并联支撑机构

柳汀 ,
林麒 ,
刘震 ,
王晓光 ,
吴惠松 ,
许勇刚

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1. 厦门大学
2. 福建省厦门市厦门大学航空系
3. 上海无线电设备研究院

收稿日期: 2023-03-07

修回日期: 2023-05-21

网络出版日期: 2023-05-22

基金资助

国家自然科学基金;国家自然科学基金

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Reconfigurable cable-driven parallel support mechanism for electromag-netic scattering test

LIU Ting ,
LIN Qi ,
LIU Zhen ,
WANG Xiao-Guang ,
WU Hui-Song ,
XU Yong-Gang

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Received date: 2023-03-07

Revised date: 2023-05-21

Online published: 2023-05-22

Supported by

National Natural Science Foundation of China;National Natural Science Foundation of China

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摘要

鉴于电磁散射测试时被测目标物姿态滚转变化的需求，提出一种能同时满足全滚转扫描和其它多种姿态测试要求的可重构绳系并联支撑机构设计方案，并对其进行了理论分析和实验验证。用双回转机构构建可重构绳系并联支撑机构，建立了该机构的运动学模型和静力学模型。根据该机构的结构矩阵，采用蒙特卡罗法，求解其力闭合工作空间，计算得到设计参数下的姿态工作空间，分析了目标物全滚转、俯仰，全滚转、俯仰和偏航两种组合姿态运动状态下，绳长的变化规律和绳拉力的分布情况。进一步地，分别对泡沫转台支架和绳系结构支撑的电磁散射特性进行了测试和分析。最后，分析了某飞机目标物在泡沫转台支架和绳系支撑下的雷达散射截面。结果表明：在8~12GHz频段内，可重构绳系并联支撑机构表现出很好的低散射特性。两种支撑方式下飞机目标雷达散射截面测试误差的绝对值不到1dBsm，相对误差介于±10%。可重构绳系并联支撑机构支撑可拓展电磁散射测试能力，具有良好的工程实际应用前景。

关键词： 可重构绳系并联支撑机构; 目标测试支撑机构; 工作空间; 电磁散射测试; 目标电磁散射特性

本文引用格式

柳汀 , 林麒 , 刘震 , 王晓光 , 吴惠松 , 许勇刚 . 电磁散射测试的可重构绳系并联支撑机构[J]. 航空学报, 0 : 0 -0 . DOI: 10.7527/S1000-6893.2023.28658

Abstract

In view of the test requirements for electromagnetic scattering test where the rolling attitude of the object needs to be changed, a design scheme of a reconfigurable cable-driven parallel support mechanism is proposed which can meet the requirements of full rolling scanning and other attitude testing simultaneously, and its feasibility is theoreti-cally analyzed and experimentally demonstrated. A reconfiguration strategy with a double rotary mechanism is used to construct a reconfigurable cable-driven parallel support mechanism and the kinematic and static model of the reconfigurable cable-driven parallel support mechanism is derived. Based on the structure matrix of the mechanism, the force closure workspace is solved using the Monte-Carlo method to calculate the attitude workspace for the de-sign parameters. The variation pattern of cable length and the variation characteristics of cable tension are further analyzed for the two composite attitudes motion states of full rolling and pitching, full rolling and pitching and yawing of the target. Further, the electromagnetic scattering characteristics of the foam turntable support and cable structure are tested and analyzed separately. Finally, a comparative analysis of the radar scattering cross section of a aircraft target both on a foam turntable support and supported by the cable-driven parallel support mechanism is carried out. The results indicate that the reconfigurable cable-driven parallel support mechanism shows good low scattering characteristics at 8~ 12 GHz frequency band. Under the two support methods, the absolute value of the test error of aircraft target radar cross section is less than 1dbsm, and the relative error is between ±10%. The reconfigurable cable-driven parallel support mechanism can expand the ability of electromagnetic scattering test, and has a good prospect of engineering application.

Key words： Cable-driven parallel mechanism; target test support mechanism; workspace; scattering measurement; elec-tromagnetic scattering characteristics

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