摘要
对运载火箭非致命故障下的任务降级轨迹规划问题进行了研究。考虑降级轨道目标点未知带来的终端状态不确定情况,利用离散配点选取时考虑终端状态的flipped Radau伪谱法将连续最优控制问题转化为代数约束的非线性规划问题。分别针对某型运载火箭三子级推力下降无滑行和考虑滑行的情况,从初始轨迹敏感度、求解收敛精度等方面对任务降级轨迹规划问题的特性展开数值实验与分析,为后续工程实施提供基础支撑。
The trajectory planning problem of orbit descent for launch vehicles with nonfatal malfunction is investigated. The uncertainties of terminal states induced by the unknown new target orbit after descent are considered,and the flipped Radau pseudospectral method,in which the terminal states are considered when the discrete collocation points are selected,is used to transfer the continuous optimal control problem into the nonlinear programming problem with algebraic constraints. The characteristics of the trajectory planning problem of orbit descent for a certain launch vehicle with and without coast are numerically analyzed in terms of the aspects such as initialization sensitivity and convergence accuracy. The results can provide basic support for the subsequent engineering implementation.
作者
周鼎
梁艳迁
梁建国
陈尔康
赵俊淇
ZHOU Ding;LIANG Yanqian;LIANG Jianguo;CHEN Erkang;ZHAO Junqi(Shanghai Aerospace System Engineering Institute,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2020年第S02期53-58,70,共7页
Aerospace Shanghai（Chinese&English）
作者简介
周鼎(1991-),男,博士,工程师,主要研究方向飞行器轨迹规划、制导导航与控制等。
