有扰情况下欠驱动刚性航天器旋转轴稳定研究

研究欠驱动刚性航天器受到正弦干扰力矩作用时的旋转轴指向稳定控制问题。采用欧拉-泊松形式描述航天器的运动方程,然后分别针对轴对称情况和非轴对称情况设计控制律,并结合Lyapunov直接法和LaSalle不变性定理证明控制律的全局渐近稳定性。理论分析和仿真结果都表明新的控制律能够实现旋转轴指向全局渐近稳定。

Spin-Axis Stabilization of Underactuated Rigid Spacecraft under Disturbances

The analysis of spin-axis stabilization of underactuated rigid spacecraft in the presence of sinusoidal disturbance is presented in this paper. By using Euler-Poisson form to describe the equations of motion, the paper studies the problem of the underactuated rigid axisymmetric spacecraft and asymmetric spacecraft, where the global asymptotic stability of the closed-loop systems for both axisymmetric spacecraft and asymmetric spacecraft are also proved by combining the Lyapunov direct method with the LaSalle's theorem. The analytical and simulated results show that the proposed control law is effective in the presence of sinusoidal disturbance.