鸭式布局双旋弹转速特性分析

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1、鸭式布局双旋弹转速特性分析常思江】，李岩I,刘铁铮2(1.南京理工大学能源与动力工程学院，南京210094；2.中国兵器科学研究院军贸装备发展部，北京100089)摘要：为发展具冇精确打击能力的冇控旋转稳定弹，以一类采用双旋结构的鸭式布局旋转稳定弹为对象，对其转速特性进行了研究。考虑该类弹箭的前、后体以不同转速绕弹体纵轴旋转，针对计及两体魁动滚转的绕质心运动动力学模型，采用数值方法对前、后转速变化规律进行了仿真研究，分析了不同因素对转速特性的影响，并对由此引起的偏流和攻角变化进行了讨论。在不同条件下对前、后体转速动力学模型进行解析求解，分别得到了简化形式

2、和耦合形式的解析解，并据此对前、后体转速特性进行了定性分析。理论分析及仿真结果表明，舵面作用、两体极转动惯量比及两体间的滚转约束等对双旋弹前、厉体转速具有不同程度的影响，通过合理设计这些参数可获得所需的转速特性，为后续开展制导控制方案设计等提供了依据。关键词：飞行动力学；双旋弹；转速；鸭舵控制：弹道特性；差动白旋中图分类号：TJ765.4AnalysisofSpinRatePropertiesforDual-spinProjectilesEquippedwithCanardSurfacesCHANGSijiangi,LIYam,LIUTiczhcng2(

3、1.SchoolofEnergy&PowerEngineering,NaiijingUniversityofScienceandTechnology,Nanjjing210094;2.DepartmentofMilitaryEquipmentTradeDevelopment,OrdnanceScienceInstituteofChina,Beijing100089)Abstract:Todeveloptheguidedspin-stabilizedprojectileswithhighhitprecision,thespinratepropertieso

4、fatypeofdual-spinprojectilesequippedwithcanardsisinvestigated.Bytakingintoaccountthedifferentspinratesoftheforwardbodyandaftbodyalongtheprojectile'slongitudinalaxisandaimingatthedynamicmodelofmotionaroundthepointmassconsideringthedifferentialspinrates,thevariationlawofspinratesfo

5、rforwardandaftbodieswasstudiedbynumericalsimulation.Theinfluenceofdifferentfactorsonspinratepropertywasanalyzedandthesubsequentchangeofballisticdriftandangleofattackwerealsodiscussed.Thedynamicmodelofspinrateswassolvedanalyticallyunderdifferentconditions.Boththesimplifiedandcoupl

6、edanalyticalsolutionswereobtained,basedonwhichthespinratecharacteristicswerealsoanalyzedfromanalyticalpointofview.Theresultsoftheoreticalanalysisandnumericalsimulationindicatethatthespinralesofforwardandaftbodiesareinfluencedbycanardsaction,theratioofthemomentofinertialfortwobodi

7、esandtheconstraintbetweentwobodiesinvaryingdegrees・Requiredspinratesforforwardandaftbodiescouldbeacquiredbyvirtueofdesigningcorrespondingparameterstoareasonabledegree.Itisuseflilforfurtherresearchonthedesignofguidanceandcontrolscheme・Keywords:flightdynamics;dual-spinprojectile;sp

8、inrate;canardcontrol;ballisticproperty;d