資源描述:
《彈載天線旋轉(zhuǎn)對(duì)接收信號(hào)多普勒偏差的影響》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、第33卷第6期2014年11月飛行器測(cè)控學(xué)報(bào)JournalofSpacecraftTT&CTechnologyV01.33No.6NOV.2014引用格式:朱宏權(quán),吳嶺,王俊峰.彈載天線旋轉(zhuǎn)對(duì)接收信號(hào)多普勒偏差的影響EJ].飛行器測(cè)控學(xué)報(bào),2014,33(6):491—495ZhuHongquan,wuLing,WangJunfeng.Impactofrotationofmissile-borneantennasonDopplershiftofreceivedsignalsEJ]JournalofSpacecraftTT8LCTechnology,2014,33(6):491—495
2、.彈載天線旋轉(zhuǎn)對(duì)接收信號(hào)多普勒偏差的影響+朱宏權(quán),吳嶺,王俊峰(北京跟蹤與通信技術(shù)研究所·北京·100094)摘要:由彈體自旋產(chǎn)生的彈栽天線的旋轉(zhuǎn)是引起地面測(cè)控站多普勒測(cè)速誤差的一個(gè)重要因素。根據(jù)線極化信號(hào)接收原理,對(duì)彈栽天線旋轉(zhuǎn)條件下接收的左旋和右旋信號(hào)多普勒偏差進(jìn)行了理論推導(dǎo)和分析。分析結(jié)果表明:左/右旋接收信號(hào)將產(chǎn)生幅度相等、極性相反的多普勒偏差,多普勒偏差的均值與彈載天線旋轉(zhuǎn)速率在數(shù)值上相等,多普勒偏差的方差隨著目標(biāo)視線與天線轉(zhuǎn)軸之間夾角的增大而增大。為驗(yàn)證理論分析結(jié)果,開展了天線轉(zhuǎn)臺(tái)模擬實(shí)驗(yàn),實(shí)驗(yàn)測(cè)量得到的多普勒偏差的均值和方差與理論分析結(jié)果基本一致。最后,根據(jù)理論分析和模
3、擬實(shí)驗(yàn)結(jié)果,提出在實(shí)際任務(wù)中,可采用左旋和右旋多普勒偏差均值差的一半分別對(duì)左/右旋信號(hào)的多普勒進(jìn)行補(bǔ)償,以減小彈載天線旋轉(zhuǎn)對(duì)測(cè)速精度的影響。關(guān)鍵詞:多普勒偏差;天線旋轉(zhuǎn);圓極化信號(hào);測(cè)速精度中圖分類號(hào):TN958文獻(xiàn)標(biāo)志碼:A文章編號(hào):1674—5620(2014)06—0491—05DOI:10.7642/j.issn.1674—5620.2014—06—0491—05ImpactofRotationofMissile-BorneAntennasonDopplerShiftofReceivedSignalsZHUHongquan,WULing,WANGJunfeng(Beijing
4、InstituteofTrackingandTelecommunicationTechnology,Beijing100094)Abstract:TherotationofantennasduetoaspinningmissileisthemaincauseofDopplershiftmeasuredbygroundstations.Accordingtothereceivingprincipleoflinearlypolarizedsignals,DopplershiftisanalyzedforLHCP(Left—HandCircularPolarization)andRHCP(
5、Right——HandCircularPolarization)signalswhicharereceivedfromthespin——ningmissileantenna.ItisshownthattheDopplershiftsforLHCPandRHCPsignalsareequalinmagnitudebutop—positeinpolarity.TheaveragemagnitudeoftheDopplershiftisequaltothevelocityoftherotatingantenna.ThevariationoftheDopplershiftincreasesw
6、iththeanglebetweentherotationaxisandsignaltransmitaxis.Theconclu—sionisprimarilydemonstratedbyasimulatedexperimentusingatransmitantennastabilizedduringthespinningstage.Accordingtotheconclusion,halfofthedifferenceoftheDopplermeansforLHCPandRHCPcouldbecalcu—latedtoeliminatetheDopplershiftcausedby
7、therotationofmissileantennas.Keywords:Dopplershift;antennarotation;circularpolarizationsignal;accuracyofrangeratemeasurement0引言導(dǎo)彈在飛行過程中,通常會(huì)繞彈軸低速旋轉(zhuǎn),以克服推力偏心、隨機(jī)陣風(fēng)等干擾的影響,增強(qiáng)彈體的姿態(tài)穩(wěn)定性,并提高導(dǎo)彈的命中精度‘1
8、。但是,對(duì)于導(dǎo)彈測(cè)控系統(tǒng)來說,由于彈載天線固定于彈體,導(dǎo)彈的旋轉(zhuǎn)將會(huì)引起彈載天線