基于特征模型的力矩受限卫星三轴姿态控制

针对控制力矩受限的卫星大角度姿态机动控制问题，设计了一种基于特征模型的低增益反馈控制器.根据原对象动力学模型建立二阶时变差分方程形式的特征模型，通过推导得到了特征模型参数范围。给出了低增益饱和控制方法，并设计低增益反馈控制器，解决了控制输入饱和所带来的性能下降甚至系统不稳定的问题.通过使用特征建模有效地解决了常规控制方法难以使用于一些复杂对象控制的问题.控制受限卫星大角度姿态机动仿真验证了所提出控制方法的有效性.

Characteristic-Model-Based Attitude Control for Satellites with Input Saturation

For solving the problem of large-angle maneuver control for satellites subject to input saturation, a low gain feedback control law based on characteristic model is designed. The characteristic model is established in the form of a second order time variable difference equation based on the dynamic model of the initial system, and the range of characteristic model parameters is calculated. The low-gain feedback law is instructed and is designed based on the characteristic model to deal with the performance deterioration or instability caused by input saturation. Characteristic model extends the application range of low-gain feedback law to some complex systems. By simulating single axes attitude maneuvering process of satellites subject to input saturation, availability of the low gain control law based on this characteristic model is validated.