Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7153528 | Chinese Journal of Aeronautics | 2018 | 11 Pages |
Abstract
In this paper, we propose a novel anti-disturbance attitude control law for combined spacecraft with an improved closed-loop control allocation scheme. More specifically, a saturated approach is adopted to guarantee the global asymptotic stability under control input saturation. To enhance the robustness of the system, a nonlinear disturbance observer is constructed to compensate the disturbances caused by inertial parameter uncertainty and unmodeled dynamics. Next, the quadratic programming algorithm is used to obtain an optimal open-loop control allocation scheme, where both energy consumption and actuator saturation have been considered in the allocation of the virtual control command. Then, a modified closed-loop control allocation scheme is proposed to reduce the allocation error under the actuator uncertainty. Finally, stability analysis of the closed-loop system with the proposed allocation scheme is provided. Simulation results confirm the effectiveness of the proposed control scheme.
Related Topics
Physical Sciences and Engineering
Engineering
Aerospace Engineering
Authors
Jianzhong QIAO, Zhibing LIU, Wenshuo LI,