固体火箭技术
固體火箭技術
고체화전기술
JOURNAL OF SOLID ROCKET TECHNOLOGY
2010年
1期
5-8
,共4页
李晓斌%董敬文%王永杰%金振中
李曉斌%董敬文%王永傑%金振中
리효빈%동경문%왕영걸%금진중
火箭靶弹%零升阻力系数%诱导阻力%参数辨识%不确定性
火箭靶彈%零升阻力繫數%誘導阻力%參數辨識%不確定性
화전파탄%령승조력계수%유도조력%삼수변식%불학정성
rocket target%zero-lift drag coefficient%induced drag%parameter identification%uncertainty
火箭靶弹无控飞行过程中飞行攻角较小且无法准确模拟,为提高靶弹弹道理论预估精度,弹道理论计算可假定飞行攻角为零,将飞行攻角产生的诱导阻力贡献折算为对零升阻力系数的修正.建立了火箭靶弹气动特性工程计算方法,针对火箭靶弹零升阻力系数计算模型不确定性问题,利用火箭靶弹A飞行试验GPS遥测数据对其零升阻力系数进行了参数辨识,基于辨识结果对火箭靶弹零升阻力系数工程计算方法进行了修正.经火箭靶弹B飞行试验结果验证,由于综合考虑了飞行攻角产生的诱导阻力贡献,采用修正后的零升阻力系数,弹道理论预估精度大大提高,满足工程要求.
火箭靶彈無控飛行過程中飛行攻角較小且無法準確模擬,為提高靶彈彈道理論預估精度,彈道理論計算可假定飛行攻角為零,將飛行攻角產生的誘導阻力貢獻摺算為對零升阻力繫數的脩正.建立瞭火箭靶彈氣動特性工程計算方法,針對火箭靶彈零升阻力繫數計算模型不確定性問題,利用火箭靶彈A飛行試驗GPS遙測數據對其零升阻力繫數進行瞭參數辨識,基于辨識結果對火箭靶彈零升阻力繫數工程計算方法進行瞭脩正.經火箭靶彈B飛行試驗結果驗證,由于綜閤攷慮瞭飛行攻角產生的誘導阻力貢獻,採用脩正後的零升阻力繫數,彈道理論預估精度大大提高,滿足工程要求.
화전파탄무공비행과정중비행공각교소차무법준학모의,위제고파탄탄도이론예고정도,탄도이론계산가가정비행공각위령,장비행공각산생적유도조력공헌절산위대령승조력계수적수정.건립료화전파탄기동특성공정계산방법,침대화전파탄령승조력계수계산모형불학정성문제,이용화전파탄A비행시험GPS요측수거대기령승조력계수진행료삼수변식,기우변식결과대화전파탄령승조력계수공정계산방법진행료수정.경화전파탄B비행시험결과험증,유우종합고필료비행공각산생적유도조력공헌,채용수정후적령승조력계수,탄도이론예고정도대대제고,만족공정요구.
The angle-of-attack of the unguided rocket target is small and difficult to be simulated. In order to improve the pre-diction accuracy of rocket target ballistic characteristics, the angle-of-attack of the unguided rocket target was assumed to be zero and the drag induced by the angle-of-attack was calculated to correct the zero-lift drag coefficient. The engineering calculation method of rocket target aerodynamic characteristics was established. Aiming at the uncertainty problem of zero-lift drag coefficient calculation medel,the zero-lift drag coefficient was identified based on GPS telemetry results of rocket target A flight test and the engineering calculation method of zero-lift drag coefficient were corrected by identification results. The GPS telemetry results of rocket target B flight test show that, due to taking into account the induced drag effect, the prediction accuracy of rocket target ballistic characteris-tics can been improved greatly by applying corrected zero-lift drag coefficient.