再入目标质阻比估计算法研究_金文彬再入目标质阻比估计算法研究_金文彬.pdf

26 5 JOURNAL OF NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY Vol. 26 No. 5 2004 : 1001- 2486( 2004) 05- 0046- 06 X 金文彬, 刘永祥, 黎 湘, 任双桥 ( AT R , 410073) : , / 0 , , : ; ; ; : T N95 : A Research on Estimation of Mass-to- drag Ratio of Reentry Objects JIN Wen-bin, LIU Yon-x ian , LI Xian , REN Shuan -qiao ( ATR Lab, National Univ1 of Defense Technolo y, Chan sha 410073, China) Abstract:The key problem for reentry vehicle ( RV) discriminat ion durin the reentry phase is to estimate the mass-to-dra rat io of RV precisely and rapidly. Aimin at the nonlinear characteristic of reentry process, three filters: as spline Kalman filter, extended Kalman filter and a new extended Kalman filter based on / unscented transform0 are studied. T he comparison of estimatin performance for these filters are provided throu h simulatin experiment with terms of estimatin precision and conver in speed. Experimental results show that the new EKF based on / unscented transform0 has t he best performance on t he estimation of mass-to-dra ratio. Key words:mass-to-dra ratio; spline Kalman; extented Kalman filter; unscented transform , , , , [ 1~ 5] , , , [ 1, 4] , , , , [ 2~ 4] , [ 8] , : ( Spline Kalman) ( EKF) / 0 ( Unscented Transform) [ 5~ 7] ( New EKF) , , ( CA) 1 , 2 5 3 2 , GM / R , GM = 31986 @ 10 km / s , R , : X :2004- 03- 12 :( 4130304- 01) :( 1980) ) , , , : 47