航空发动机电子控制器机箱电磁兼容设计技术研究

中图分类号：V233.7论文编号：102870212-S041学科分类号：082502硕士学位论文航空发动机电子控制器机箱电磁兼容设计技术研究研究生姓名鲁亮学科、专业航空宇航推进理论与工程研究方向电子控制器电磁兼容技术指导教师徐建国讲师南京航空航天大学研究生院能源与动力学院二О一一年十二月NanjingUniversityofAeronauticsandAstronauticsTheGraduateSchoolCollegeofEnergyandPowerResearchonEMCDesignTechnologyofElectronicControlUnitEnclosureforAero-EngineAThesisinECUEMCTechnologyforAero-EnginebyLuLiangAdvisedbyLecturerXuJianguoSubmittedinPartialFulfillmentoftheRequirementsfortheDegreeofMasterofEngineeringDecember,2011承诺书本人郑重声明：所呈交的学位论文，是本人在导师指导下，独立进行研究工作所取得的成果。尽我所知，除文中已经注明引用的内容外，本学位论文的研究成果不包含任何他人享有著作权的内容。对本论文所涉及的研究工作做出贡献的其他个人和集体，均已在文中以明确方式标明。本人授权南京航空航天大学可以有权保留送交论文的复印件，允许论文被查阅和借阅,可以将学位论文的全部或部分内容编入有关数据库进行检索，可以采用影印、缩印或其他复制手段保存论文。(保密的学位论文在解密后适用本承诺书)作者签名：日期：南京航空航天大学硕士学位论文I摘要电磁兼容性是决定航空发动机电子控制器能否稳定工作的重要因素，本文旨在研究航空发动机电子控制器机箱的电磁兼容性问题。首先结合电子控制器的工作特点对其进行了EMI分析，在此基础上给出了机箱电磁兼容设计的对策。对于通过机箱进出电缆进行传播的传导干扰，采用转折频率法设计了EMI电源滤波器，完成了滤波器从指标获取、结构选取到拓扑分析、参数计算的整个设计流程；并基于Saber软件对滤波效果进行了仿真验证。对于经由空间辐射和孔洞耦合进行传播的辐射干扰，采用搭接、孔洞屏蔽等措施提高机箱的屏蔽效能；对机箱电磁兼容性仿真技术进行了研究，基于HFSS软件进行了材料、孔洞形式与分布对机箱屏蔽效能影响的仿真分析，所得结论可用于指导机箱的电磁兼容性设计。关键词：电磁兼容，EMI测试，EMI电源滤波器，机箱屏蔽，屏蔽效能仿真航空发动机电子控制器机箱电磁兼容设计技术研究IIAbstractElectromagneticcompatibility(EMC)isanimportantfactorthatdetermineswhethertheaero-engineelectroniccontrolunit(ECU)couldworkreliably.ThispaperisdedicatedtoresearchingtheEMCproblemofECUenclosure.Firstly,EMIfactorsofECUareanalyzedandsomemaincorrespondingmeasuresareproposed.ForconductedinterferencespreadingalongthecableofECU,anEMIfilterisdesignedbycalculatingcut-offfrequency.Andthecompletedesignprocessisproposed,includingdesignindicesdetermining,structureselection,topologyanalysisandparametercalculation.ThefilterisvalidatedbysimulationwithSabersoftware.ForradiationinterferencespreadingthroughholesofECUenclosure,techniquemeasuressuchasoverlap,holesshieldingareputforwardtoimproveshieldingeffectiveness.Finally,EMCsimulationtechnologyofECUenclosureisresearched.Andtherelationshipbetweentheforms,distributionofenclosureholesandshieldingeffectivenessissimulatedwithHFSSsoftware.ThesimulationresultscouldbeusedasguidanceinthedesignofECUenclosure.Keywords:EMC，EMItest，EMISourceFilter，EnclosureShielding，ShieldingEffectivenessSimulation南京航空航天大学硕士学位论文III目录第一章绪论..........................................................................................................................................11.1电磁兼容的研究背景..............................................................................................................11.2电磁兼容仿真技术的发展现状..............................................................................................31.3本文的研究意义和内容安排..................................................................................................5第二章电子控制器EMI分析与测试.................................................................................................82.1引言.........................................................................................................................................82.2EMI分类及抑制......................................................................................................................82.3电子控制器的结构组成..........................................................................................................92.4电子控制器的EMI分析......................................................................................................112.4.1外界传入的EMI........................................................................................................112.4.2自身传出的EMI........................................................................................................122.4.3抑制对策.....................................................................................................................132.5电子控制器的EMI测试......................................................................................................132.5.1测试标准.....................................................................................................................132.5.2测试结果.....................................................................................................................172.6本章小结...............................................................................................................................19第三章机箱EMI电源滤波器的设计...............................................................................................203.1引言.......................................................................................................................................203.2开关电源EMI信号类型与特点..........................................................................................203.3EMI电源滤波器....................................................................................................................213.3.1基本结构.....................................................................................................................213.3.2性能指标.....................................................................................................................223.4滤波器的结构选取与拓扑.................................................................................