简介:UnlikethepreviousresearchworksanalyzingthestabilityoftheT-S(Takagi?Sugeno)fuzzymodel,anextensiononthestabilityconditionofT-Sfuzzysystemswithadifferentstrategyisprovided.Inthestrategyanewvariable,whichisrelativetothegradeoffuzzymembershipfunction,isintroducedtothestabilityanalysisandanewstabilityconclusionisdeduced.Thedefinitionofstabilityconditioninthispaperisdifferentfrompreviousworks,thoughtheyaresimilarinform.Withtheproposedmethod,thesimulationinflightcontrollawshowsabettereffectiveness.
简介:RFLDMOSs}/率管具有高输出功率、高增益、高线性、良好的热稳定性等优点,广泛应用于移动通信基站、数字广播电视发射以及射频通信领域、微波雷达系统。阻抗匹配是LDMOS~率管应用电路设计的关键任务,LDMOS功率管匹配电路的主要任务是实现功率管的最大功率传输。文中选择中国电子科技集团公司第58研究所研制的S波段10wLDMOS功率管,利用微波仿真工具ADS设计外匹配电路。经过精心调试后,s波段LDMOSs}/率管输入回波损耗、增益、输出功率、效率、谐波等技术指标达到设计要求。完成匹配电路设计的S波段LDMOS功率管在3.1~3.4GHz频率范围内,输出功率大于13.8W,功率增益大于12.4dB,效率大于37.9%。
简介:ThalesRSM907S二次雷达遭到一次强雷击后导致多个部件故障,通过分析排除,总结出此次故障的检修思路和处理方法。
简介:Inthispaper,awavelengthdivisionmultiplexing(WDM)transmissionsystemderivedfromthecoherentopticalorthogonalfrequencydivisionmultiplexing(CO-OFDM)withpolarizationdivisionmultiplexing(PDM)and16-orderquadratureamplitudemodulation(QAM)isstudied.Asimulationof80-channelWDMtransmissionsystemwithdatarateof200Gbit/sisbuilt,andthetransmissionperformanceofthesystemisanalyzed.ThesimulationresultsshowthatthesystemQvalueoftheWDMchannelsat16Tbit/swithaspectralefficiencyof7.14bit/s/Hzispotentiallyover10.0dBforalonghaultransmissionupto1800kminastandardsingle-modefiber.