摘要
使用了高度和航向航程匹配求解推重比的算法,解决了一种无直接解析解的参考轨迹的求解问题.在数值仿真的基础上,简化了参考轨迹的求解,给出了推重比与高度和航向航程的关系,以及这些关系存在的原因.应用Monte Carlo仿真法对该方法求解的可行性进行了仿真验证,并基于一个类Apollo的参考轨迹,验证了算法对参数分布引起的状态不定具有鲁棒性.
An algorithm to obtain a proper thrust-to-weight ratio set by matching given altitude and downrange is proposed in this paper,and the set is essential for solving a reference trajectory which has been proven that no one analytical solution exists hitherto.On the basis of numerical simulation,the solving process is simplified and the correlation between the thrust-to-weight ratio and the needed altitude and downrange span is given.Furthermore,a Monte Carlo simulation is also designated to verify the validation of this method in dealing with the issue.As to the dispersion effect caused by parameter uncertainties,an Apollo-like trajectory chosen as a touchstone has demonstrated the robustness of the analytical algorithm.
出处
《空间控制技术与应用》
2011年第2期49-53,共5页
Aerospace Control and Application
关键词
月球软着陆
参考轨迹
解析算法
lunar soft landing
reference trajectory
analytical algorithm
