第36卷第2期2023年2月传感技术学报CHINESEJOURNALOFSENSORSANDACTUATORSVol.36No.2Feb.2023项目来源:国家自然科学基金项目(61873064)收稿日期:2021-12-23修改日期:2022-02-18Multi-VectorIn-FlightAlignmentMethodBasedonDynamicModelConstraints*LIShiqi,CHENXiyuan*(SchoolofInstrumentScienceandEngineering,SoutheastUniversity,NanjingJiangsu210096,China)Abstract:Highdynamicflightofguidedprojectilebringshugechallengestotheprecisenavigationandguidance.Aimingattheproblemthattheβ(t)intraditionalmulti-vectorin-flightalignmentmethodisvulnerabletoGNSSunlockandnoiseinterferenceinhighdynamicenvironment,anin-flightalignmentmethodbasedondynamicmodelconstraintsisproposed.Accordingtotheprojectileparticletrajecto-rydynamicmodel,theflightestimationalgorithmbasedonEKFofhigh-spinprojectileisdesigned,whichcanimprovetheaccuracyofspeedandposition.Theaccuracyofβ(t)vectorisalsoimproved.Onthisbasis,theoptimalestimationoftheinitialattitudematrixisa-chieved.Simulationexperimentindicatesthat,throughtheflightestimationalgorithmbasedonEKFofhigh-spinprojectile,speederrorisreducedby50%(RMSE),positionerrorisreducedby80%(RMSE).Meanwhile,comparedwiththetraditionalβ(t)vectorconstruc-tedbyGNSS,thein-flightcoarsealignmentcanbeachievedbythemethodproposedcombinedwiththeRequestmethod,andthemis-alignmentangleislessthan1degreeafterconvergence.Keywords:in-flightalignment;dynamicmodel;EKF;guidedprojectileEEACC:6330doi:10.3969/j.issn.1004-1699.2023.02.009基于动力学模型约束的多矢量空中对准算法*李世奇,陈熙源*(东南大学仪器科学与工程学院,江苏南京210096)摘要:制导炮弹的高动态飞行对精确导航与制导带来了极大挑战。针对传统的多矢量空中对准方法中投影到初始时刻导航坐标系矢量β(t)在高动态环境下易受GNSS信息失锁、噪声干扰的问题,提出了一种基于动力学模型约束的多矢量空中对准方法。通过引入质点弹道动力学模型来设计基于EKF的弹道运动估计算法,提升制导炮弹测速、定位的精度,并进而提升β(t)矢量构建的精度。在此基础上通过矢量定姿算法实现初始姿态矩阵的对准。仿真实验表明,基于EKF的弹道运动估计算法所获取的速度误...