论文部分内容阅读
针对探月飞船跳跃式再入轨迹分段多、段与段相互耦合、可达域求解与分析较直接再入更加困难的问题,给出了跳跃式再入轨迹可达域的数学描述,在此基础上将可达域求解问题拆分为两类最优控制问题,并建立了相应的优化模型。采用基于高斯伪谱法的两步优化策略进行求解,得到了跳跃式再入轨迹可达域边界。最后分析了初始条件(再入角、再入方位角)对可达域的影响。仿真结果表明两步优化策略能兼顾计算精度和计算效率。
In allusion to the jump-reentry trajectory of the lunar exploration spacecraft being segmented and more, the coupling of segments and segments, the solving and analysis of the reachable domain is more difficult than that of direct reentry, the mathematical description of the reachable trajectory reachable domain is given Based on this, the problem of solving reachable domains is divided into two types of optimal control problems, and the corresponding optimization model is established. The two-step optimization strategy based on Gaussian pseudospectral method was used to solve the problem, and the reachable trajectory reachable boundary was obtained. Finally, the influence of initial condition (reentry angle and reentry azimuth) on reachable domain is analyzed. Simulation results show that the two-step optimization strategy can balance the calculation accuracy and computational efficiency.