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1、第23卷第11期光學(xué)精密工程Vo1.23No.112015年11月OpticsandPrecisionEngineeringNOV.2O15文章編號1004—924X(2015)11-3090—07轉(zhuǎn)臺誤差對數(shù)字天頂儀軸系誤差的影響張志利,劉先一,周召發(fā),劉殿劍,朱文勇(第二炮兵工程大學(xué)兵器發(fā)射理論與技術(shù)國家重點(diǎn)學(xué)科實(shí)驗(yàn)室,陜西西安710025)摘要:針對數(shù)字天頂儀在定位過程中存在的的軸系偏差,研究了如何對光軸與旋轉(zhuǎn)軸、旋轉(zhuǎn)軸與垂直軸之間的角度偏差進(jìn)行補(bǔ)償?shù)姆椒?。為了高精度地解算出測站點(diǎn)位置垂直軸的天文坐標(biāo),采用對稱位置的兩幅星圖直接解算旋轉(zhuǎn)軸的坐標(biāo),從而避免了光軸與旋
2、轉(zhuǎn)軸之間的補(bǔ)償。采用雙軸傾角儀測量傾角,并對旋轉(zhuǎn)軸進(jìn)行傾角補(bǔ)償?shù)贸龃怪陛S的位置坐標(biāo)??紤]進(jìn)行軸系補(bǔ)償時(shí),轉(zhuǎn)臺誤差會對旋轉(zhuǎn)軸坐標(biāo)和傾角補(bǔ)償造成影響,分別研究了轉(zhuǎn)臺誤差對于旋轉(zhuǎn)軸以及傾角補(bǔ)償?shù)挠绊?,并得出了轉(zhuǎn)臺誤差的范圍。實(shí)驗(yàn)結(jié)果表明:當(dāng)測站點(diǎn)緯度的絕對值小于或等于88.3。時(shí),轉(zhuǎn)臺誤差必須小于或等于35;當(dāng)測站點(diǎn)緯度的絕對值大于88.3。時(shí),轉(zhuǎn)臺誤差值要小于}1166.8cos在對稱位置解算測站點(diǎn)位置坐標(biāo)時(shí),必須提高轉(zhuǎn)臺的精度,以減小轉(zhuǎn)臺誤差對于定位精度的影響。關(guān)鍵詞:數(shù)字天頂儀;軸系偏差;轉(zhuǎn)臺誤差;雙軸傾角儀中圖分類號:TH752文獻(xiàn)標(biāo)識碼:Adoi:10.3788/O
3、PE.20152311.3090InfluenceofturntableerroronaxiserrorindigitalzenithcameraZHANGZhi-li,LIUXian—yi,ZHOUZhao—fa,LIUDian—jian,ZHUWen—yong(StateKeyDisciplineLaboratoryofArmamentLaunchTheoryandTechnology,theSecondArtilleryEngineeringUniversity,Xi;an710025,China)*C0rrPs0gauthor,E-mail:1397559188
4、@qq.comAbstract:Thereareaxiserrorsinorientationprocessingofadigitalzenithcamera.Thispaperfocusesonhowtocompensatetheaxiserrorsamongopticalaxis,rotationaxisandverticalaxis.Tocalculatetheastronomica1coordinateoftheverticalaxisinameasuringstationposition.twostarimagesinanoppositedirectionwe
5、reusedtocalculatethecoordinateoftherotationaxis.Thus,thecompensationbetweenopticalaxisandrotationaxiswasavoided.Atwo—axistiltsensorwasusedtomeasuretheinclinationbetweenrotationaxisandvertica1axisandthepositioncoordinateoftheverticalaxiscouldbeobtainedbycompensatingtheangleerroroftherotat
6、ionaxis.AstheturntableerrorcouldimpactOnthecoordinateofrotationaxisandtiltcompensation,theinfluencesofturntableerroronthecalculationofrotationaxisandtiltcompensationwereanalyzed,respectivelyandtherangeofturntableerrorwasgained.Theexperimentaldatademonstratethatwhentheabsolutevalueofthela
7、titudeofthemeasuringstationisbelow88.3。,theturntableshouldbebelow35.Otherwise,theturntableerrorshouldbebelowl1166.8cos3i.Theprecisionofrotationangleshouldbeimprovedtoeliminatetheinfluenceofturntableerrorwhenthecoordinateofthemeasuringstationiscalculatedintheoppositedirect