摘要
利用反步法研究了一类挠性航天器的姿态机动问题,提出了一种基于干扰观测器的反步控制设计方案。首先,构造干扰观测器对挠性模态、挠性模态变化率以及外界扰动所构成的等效扰动进行观测;其次,利用反步法设计了一种非线性控制器使得角速度能够跟踪虚拟角速度,从而实现姿态机动的目标。仿真结果表明,所提方法可以快速实现挠性航天器的姿态机动,同时所设计的干扰观测器能够有效地抑制挠性附件的抖动。
The attitude maneuver of the flexible spacecraft was studied by using backstepping feedback controller.Firstly,a disturbance observer was constructed to observe the flexible mode,the change of the flexible mode and the equivalent disturbance formed by the external disturbance.Secondly,a nonlinear controller was designed by using backstepping feedback controller to track the virtual angular velocity.Then,the target of attitude maneuver realized.Simulation results showed that the proposed method can quickly realize the attitude maneuver of the flexible spacecraft.The designed disturbance observer can effectively suppress the vibration of the flexible appendage.
作者
郭君瑞
管萍
GUO Jun-rui;GUAN Ping(Beijing Information Science and Technology University,Beijing 100192,China)
出处
《传感器世界》
2020年第4期15-20,4,共7页
Sensor World
基金
国家自然科学基金项目(No.11732005)。
