拖曳系统飞行仿真

Flight Simulation of Towed Air-Launch System

分别采用拖缆的"刚化柔性悬索"和"线性弹簧"模型,建立了拖曳式空中发射重复使用运载器系统的动力学模型,并对拖曳系统在纵向平面内的整个飞行过程,包括起飞、爬升、改平以及平飞,进行了仿真计算,其计算方法是可行的,拖缆采用这两种模型获得的计算结果基本一致,可用于拖曳空中发射重复使用运载器可行性的评价。同时对拖缆采用上述两种模型时,其作用于拖曳飞机和运载器的拉力的大小和方向进行了研究,相互印证了这两种模型的可行性。研究结果表明在拖曳系统这样的多体系统中,上述两种拖缆模型的使用是合适的。

Taking the towline respectively as 'rigidized-flexible suspended cable ' model and 'linear spring' model, this paper builds the dynamic model of a towed air-launching system, simulates and calculates its full flight course in a longitudinal plane, including take-off, climb, level off and level flight. The simulation results obtained by applying the two towline models are almost the same, and can be used for assessing the feasibility of towed air-launch Reusable Launch Vehicle (RLV). And the algorithm for simulating the system flight is feasible. In addition, the towline's forces that act on the towed aircraft and the towed vehicle are studied in detail. The results verify mutually the feasibility of the two models of the towline. In a word, these two models are applicable for such multibody system.