Pseudospectral method based trajectory optimization and fairing rejection time analysis of solid launch vehicle  

作　　者：XUAN Ying ZHANG WeiHua ZHANG YuLin 

机构地区：[1]College of Aerospace and Material Engineering,National University of Defense Technology,Changsha 410073,China

出　　处：《Science China(Technological Sciences)》2009年第11期3198-3206,共9页中国科学（技术科学英文版）

基　　金：Supported by the National High Technology Research and Development Program of China ("863" Program)

摘　　要：The problem of real-time trajectory optimization for small solid launch vehicle of operational responsive space (ORS) was studied by using pseudospectral method. According to the characteristic of the trajectory design, the dynamics model was set up in the inertia right-angled reference frame, and the equation and parameter at the orbit injection point were simplified and converted. The infinite dimension dynamic optimal control problem was converted to a finite dimension static state optimization problem and the algorithm reduced the complexity so as to become a general algorithm in trajectories optimization. With the trajectories optimization of a three-stage solid vehicle with a liquor upper stage as example, the model of the trajectory optimization was set up and simulations were carried out. The results demonstrated the advantage and validity of the pseudospectral method. The rejection time of fairing was also analyzed by the simulation results, and the optimal flight procedure and trajectory were obtained.The problem of real-time trajectory optimization for small solid launch vehicle of operational responsive space (ORS) was studied by using pseudospectral method. According to the characteristic of the trajectory design, the dynamics model was set up in the inertia right-angled reference frame, and the equation and parameter at the orbit injection point were simplified and converted. The infinite dimension dynamic optimal control problem was converted to a finite dimension static state optimization problem and the algorithm reduced the complexity so as to become a general algorithm in trajectories optimization. With the trajectories optimization of a three-stage solid vehicle with a liquor upper stage as example, the model of the trajectory optimization was set up and simulations were carried out. The results demonstrated the advantage and validity of the pseudospectral method. The rejection time of fairing was also analyzed by the simulation results, and the optimal flight procedure and trajectory were obtained.

关 键 词：PSEUDOSPECTRAL method solid LAUNCH vehicle TRAJECTORY optimization REJECTION TIME of FAIRING 

分 类 号：V475.1[航空宇航科学与技术—飞行器设计]