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空间中非合作体附着航天器本体后,新组合体惯量参数未知、系统引入的动量变化未知,容易造成航天器姿态控制失稳。针对此问题,提出了一种基于非合作组合体整体惯量估计的自适应控制方案,实现不同情形附着下新组合体姿态的快速和高精度恢复。通过构造李雅普诺夫函数,对自适应控制方案稳定性进行了证明。搭建的某卫星被非合作组合体附着后的姿控仿真平台表明,在非合作体惯量参数未知、引入动量未知以及附着前系统状态不定等恶劣情况下,采用该算法的组合体姿控误差可收敛到一个极小的领域内,可以实现对非合作组合体系统快速而有效的控制。
Space non-cooperative body attached to the spacecraft body, the inertia of the new combination of parameters is unknown, the system to introduce momentum changes unknown, likely to cause spacecraft attitude control instability. Aiming at this problem, an adaptive control scheme based on the estimation of the overall inertia of a non-cooperative combination is proposed to realize the fast and high-precision restoration of the attitude of the new combination under different conditions. By constructing Lyapunov function, the stability of adaptive control scheme is proved. The attitude control simulation platform of a satellite built by a non-cooperative combination shows that the attitude error of the combination can be obtained under the condition of unknown parameter of inertial mass, unknown momentum and unknown state before attachment. Convergence in a very small area enables rapid and effective control of non-cooperative systems.