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考虑一类带液体燃料的航天器,由于航天器控制自身姿态的同时,还需要抑制液体燃料的晃动,使得系统整体表现为一个欠驱动系统.针对给出的物理模型,将其转化为一定形式的标准型,并对模型的特性进行了分析验证,最后采用一种适用于一类欠驱动系统的滑模控制方法来进行控制器的设计.由系统的稳定性分析可以看出,设计的控制器可以使系统的一些状态量达到平衡点,而剩下的状态量在系统自身特性的作用下,也能够达到平衡点,进而使整个航天器系统渐近稳定.仿真结果证明了控制器的有效性和可行性.
Considering a kind of spacecraft with liquid fuel, the spacecraft needs to control the sloshing of liquid fuel while controlling its own attitude, so that the whole system behaves as an under-driven system. For the given physical model, it is transformed into a certain form Of the standard model, and the characteristics of the model were analyzed and verified, and finally used a sliding mode control method for a class of under-driven system for controller design.From the stability analysis of the system can be seen that the design of control Which can make some state quantities of the system reach the equilibrium point, and the remaining state quantities can reach the equilibrium point under the function of the system itself, so that the whole spacecraft system is asymptotically stable.The simulation results show that the controller is effective Sexuality and feasibility.