重复使用运载器末端能量管理段轨迹线设计

为了研究重复使用运载器末端能量管理段的下滑轨迹线设计,给出了基于高度和动压的质点动力学的设计方法。首先,将基于时间历程的质点动力学方程转化为基于高度剖面的质点动力学方程,同时利用动压代替速度,使轨迹形状直接和动压约束相关。接着,利用基于动压和高度剖面的质点动力学方程,结合末端能量管理段制导与控制的特点,将不同的轨迹设计问题转化为不同的数学优化问题,并且给出了轨迹设计的数学方法和步骤,主要包括:最陡下滑、最大升阻比下滑和参考下滑轨迹剖面的设计。最后利用上述方法,针对所研究的重复使用运载器的对象特性,设计了具体的轨迹剖面和能量走廊。结果表明此方法具有较强的实用性和工程性。

Trajectory design for terminal area energy management of reusable launch vehicle

To research the trajectory design method for terminal area energy management(TAEM) of reusable launch vehicle(RLV),the method basing on nonlinear equations of motion is designed.First,time replaced by altitude and dynamic pressure as the independent variable of nonlinear equations of motion,which make the trajectory shape correlative to dynamic pressure constrains.Then,basing on the guidance scheme,the different optimize problem is Abstracted from the different problem of trajectory design using nonlinear equations of motion which governing dynamic pressure,which including the max dive line,the max glide line and the reference line.The mathematic method and process of trajectory design are introduced also.At last,using the method as mentioned above,the TAEM trajectories and energy corridor were designed for a RLV.The results show that the method mentioned above is practicable and usable in engineering.