摘要
许多空间飞行任务需要挠性航天器的姿态跟踪控制。由于燃料消耗和柔性附件展开等原因,挠性航天器的惯量矩阵并非确定的常值矩阵,本文研究惯量矩阵未知时挠性航天器的姿态跟踪控制问题。基于惯量估计器设计了非线性反馈控制器,使航天器跟踪惯性空间的目标姿态角速度。通过构造Lyapunov函数并利用Barbalat引理证明了控制系统的全局渐进稳定性。最后进行了数值仿真以验证控制器的有效性。
The attitude tracking control of flexible spacecraft is required in the wide range of spaceflight tasks.Fuel consuming and deploying of flexible structures make the inertial matrix values changed with time varying.The attitude tracking control of flexible spacecraft with unknown inertial matrix is investigated in this paper.A nonlinear feedback controller based on inertial-estimator is developed to make the spacecraft to track the desired angular velocity.The Barbalat lemma and Lyapunov function are adopted to prove the global stability of the tracking system.Finally,numerical simulations show the effectiveness of the proposed controller.
出处
《航天控制》
CSCD
北大核心
2010年第3期24-28,共5页
Aerospace Control
