考虑火箭弹弹性变形的视线角速率提取算法

In order to deal with the problem of the line-of-sight（LOS）angular rate reducing accuracy due to the elastic deformation of the strap-down seeker rocket，the rigid-flexible coupling dynamic model of the rocket in the transient coordinate system and an online identification model for elastic deformation are established，and a line-of-sight angular rate extraction method considering elastic deformation is proposed. Aiming at the problem of insufficient estimation accuracy of traditional nonlinear filtering algorithms due to model approximation errors and non-Gaussian observation noise，a continuous-discrete extended set membership filtering algorithm（CD-ESMF）with 6-order nested implicit Runge-Kutta （NIRK）precise integration is proposed，and high-precision extraction of line-of-sight angular rate considering the rocket elastic deformation is realized.