中国空间科学技术
中國空間科學技術
중국공간과학기술
CHINESE SPACE SCIENCE AND TECHNOLOGY
2014年
5期
71-78
,共8页
场线耦合%改进时域有限差分法%集总源模型%航天器
場線耦閤%改進時域有限差分法%集總源模型%航天器
장선우합%개진시역유한차분법%집총원모형%항천기
Field/wire coupling%Improved finite difference time domain method%Lumped source model%Spacecraft
针对典型的电磁脉冲对航天器电缆耦合问题,建立了航天器场线耦合分析模型。在场分布计算方面,采用基于平均电参数和分析目标与 Yee网格不重合的边缘部分修正的改进时域有限差分法。在场线耦合方面,建立基于集总等效源模型的多导体传输线瞬态响应模型,将外场在传输线上激励的分布电压源和电流源与传输线指数矩阵解耦,建立了集总等效电压源和电流源模型。采用分析模型分析运载内一根电缆受电磁脉冲影响的响应,结果表明,即使存在屏蔽作用,电磁脉冲在电缆上耦合的干扰足以损毁设备。
針對典型的電磁脈遲對航天器電纜耦閤問題,建立瞭航天器場線耦閤分析模型。在場分佈計算方麵,採用基于平均電參數和分析目標與 Yee網格不重閤的邊緣部分脩正的改進時域有限差分法。在場線耦閤方麵,建立基于集總等效源模型的多導體傳輸線瞬態響應模型,將外場在傳輸線上激勵的分佈電壓源和電流源與傳輸線指數矩陣解耦,建立瞭集總等效電壓源和電流源模型。採用分析模型分析運載內一根電纜受電磁脈遲影響的響應,結果錶明,即使存在屏蔽作用,電磁脈遲在電纜上耦閤的榦擾足以損燬設備。
침대전형적전자맥충대항천기전람우합문제,건립료항천기장선우합분석모형。재장분포계산방면,채용기우평균전삼수화분석목표여 Yee망격불중합적변연부분수정적개진시역유한차분법。재장선우합방면,건립기우집총등효원모형적다도체전수선순태향응모형,장외장재전수선상격려적분포전압원화전류원여전수선지수구진해우,건립료집총등효전압원화전류원모형。채용분석모형분석운재내일근전람수전자맥충영향적향응,결과표명,즉사존재병폐작용,전자맥충재전람상우합적간우족이손훼설비。
Aiming at the typical problems of electromagnetic pulse influencing wires of the spacecraft, the spacecraft field/wire coupling analysis model was built. To calculate the electromagnetic field, the finite difference time domain method was improved. The average electrical parameters was adopted,and the obj ect edges was modified,which cannot match the Yee grids.To analyze the field/wire coupling, the multiconductor transmission line transient reponse model based on the lumped equivalent sources was proposed. The distributed voltage and current sources excited by the incident field were decoupled with the exponential multiconductor transmission lines matrix. The lumped equivalent voltage and current sources model were built. The model was used to analyze a wire in the launch vehicle which was influenced by the electromagnetic pulse.The analysis results show that the interference of the electromagnetic pulse to the wires can destroy the equipment,even though there is shield.