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针对诸如模块更换、燃料加注等在轨操作任务中的相对动力学与控制问题,建立了描述航天器间近距离相对运动的轨道姿态耦合动力学模型,结合轨道摄动和姿态干扰力矩分析了耦合项对模型的影响。考虑到基于状态相关系数形式模型的非线性和时变性,采用θ-D次优控制算法设计了相对姿轨耦合控制器。以在轨加注任务最终逼近段为背景,针对目标航天器失控旋转的情况进行了数值仿真,仿真结果表明了θ-D控制算法能够实现对相对轨道和姿态的同步控制,简化对控制器的求解并具有较高的控制精度。
In order to solve the relative dynamics and control problems in on-orbit operation tasks such as module replacement and fuel filling, the orbit attitude coupling dynamics model describing the relative short-range relative motion between spacecraft is established. Combining with orbital perturbation and attitude disturbance moment analysis Influence of Coupling on Model. Considering the nonlinearity and time-varying based on the formal model of state correlation coefficient, a relative θ-D suboptimal control algorithm is used to design a relative attitude-rail coupled controller. The simulation results show that the θ-D control algorithm can realize the synchronous control of relative orbit and attitude, simplify the control of the controller Solve and have high control precision.