摘要
为研究组合导航杆臂效应对制导回路带来的影响,分析了惯导安装位置偏离质心带来的杆臂效应误差的产生机理及对视线角速度的影响,提出了杆臂效应寄生回路的概念并建立了分析模型,完成了模型的无量纲化.针对弹上不同的惯导安装位置,分析了寄生回路稳定性及其对制导回路性能的影响.寄生回路稳定性随弹目距离的减小而变差;当惯导位于质心后部时,杆臂效应相当于正反馈,此时寄生回路稳定域最小,对脱靶量的影响最大.应尽量将惯导布置于质心或质心前部,并在组合导航算法中引入弹体角速度修正,对杆臂效应误差进行补偿.
To study the influence of GPS/INS lever effect on guidance system,the principle of lever effect error caused by GPS/INS displaced from the gravity center of missile and its influence on the accuracy of line-of-sight angle rate were analyzed.The concept of lever-effect parasitical loop was presented.The model was constructed and converted to be dimensionless.According to different installation positions of GPS/INS,the stability of lever-effect parasitical loop and its influence on the performance of guidance loop were analyzed.With the decrease of missile-target distance,the stability of parasitical loop becomes worse.While GPS/INS is placed in the tail of missile,the lever effect is equivalent to a positive feedback,and the stability zone of the parasitical loop is minimal at this moment.The guidance accuracy is decreased also.The GPS/INS should be placed near to gravity center or at the fore of gravity center,and the lever effect should be compensated in the algorithm of integrated navigation.
出处
《弹道学报》
EI
CSCD
北大核心
2011年第4期42-46,共5页
Journal of Ballistics
基金
航空科学基金项目(20060112123)
关键词
卫星制导炸弹
杆臂效应
寄生回路
稳定性
脱靶量
satellite guidance bomb
lever effect
parasitical loop
stability
miss distance
