改进的RLV再入制导方法及其性能分析

摘要

An evolved entry guidance algorithm was developed for transatmospheric and unpowered lifting reusable launch vehicles. The algorithm regulates the reference trajectory parameters before feedback according to the range to go and the predicted one. 1000 3DOF Monte Carlo trajectory dispersions were performed, which indicate the entry guidance algorithm is reliable and robust. Moreover, the effects of mis-modeling of aerodynamics were shown with the drag coefficient 20% more and lift 20% less than the vehicle database model.%提出一种改进的再入制导算法,并用于跨大气层、无动力升力体、可重复使用运载器再入制导.该算法根据剩余航程和预测航程信息,对输入到反馈控制器的参考飞行剖面参数进行修正,以消除航程误差.1000条Monte Carlo散布仿真结果表明,该算法可靠、鲁棒性好.此外,对升力系数减少20%、阻力系数增加20%的最坏情况进行了仿真,进一步测试该再入制导方法的优劣.