近空间飞行器多模态切换控制研究

Multi-mode switching control study for near space vehicle

针对近空间飞行器大包络飞行时产生系统状态偏离问题,通过多控制律切换策略实现了大范围的指令跟踪。针对不同飞行模态间存在的切换控制问题,提出基于时间以及基于速度和高度的两种切换方法。首先研究了近空间飞行器纵向动力学模型,然后针对近空间飞行器的速度和高度误差跟踪系统进行了反步控制器设计。最后,通过仿真验证了切换控制方法的有效性。

Aiming at solving the problem of system status deviation in big flight envelope, this paper proposes a multi-control law switching strategy to achieve a wide range of command tracking. In order to solve the problems of switch control between different flight modes, two switching methods were presented based on different switching conditions. Backstepping controller for near space vehicle＇ s speed and altitude error tracking system was designed on the basis of near space vehicle longitudinal dynamics model. The simulation results show the effectiveness of the switching methods.