航天器姿态跟踪系统的自适应滑模控制

针对存在不确定惯量矩阵和外干扰的刚体航天器姿态跟踪系统,提出了一种自适应滑模控制方法。首先建立了姿态跟踪误差动力学方程,并对刚体航天器跟踪误差动力学定义了滑模,设计了自适应滑模控制律,该控制律的优点在于可以估计系统不确定块,消除了传统滑模控制中对不确定界的要求。Lyapunov分析表明了提出的自适应滑模控制器确保闭环系统取得渐近稳定性。仿真结果验证了提出的控制策略的有效性。

Adaptive Sliding Mode Control for Spacecraft Attitude Tracking System

For rigid spacecraft attitude tracking system with uncertain inertia matrix and external disturbances,an adaptive sliding mode approach is presented.Tracking error dynamics are given and a sliding mode is defined for the tracking error dynamics of rigid spacecraft.An adaptive sliding mode control law is developed and the advantage of designed controller is that it can estimate the lumped uncertainty and diminate the need for the bound of the lumped uncertainty.The designed controller is shown to achieve asymptotic stability for the closed-loop system through a Lyapunov analysis.Simulation results show its validity.