偏置动量卫星偏航姿态估计与控制研究

Yaw Attitude Estimate and Control for Biased Momentum Satellite

为改善偏置动量卫星无偏航姿态敏感器时用滚动角间接控制偏航姿态的精度,基于降维观测器设计提出了一种采用偏航角估计值直接控制偏航姿态方法。在分析收敛性的基础上,给出了降维观测器的设计,以及直接控制法的系统模型。理论分析和仿真结果表明,该法能大幅提高偏置动量卫星的姿态精度,且易于软件实现,不增加系统硬件配置。

To improve the control accuracy of the yaw attitude by roll angle indirectly for biased momentum satellite without yaw attitude sensor, a new method in which the yaw attitude was controlled directly by yaw angle estimation was put forward in this paper. On the basis of the analysis on the convergence, the designed order-reducing observer and direct control model were given out. The theoretical analysis and simulation results showed that this method would improve the attitude precision of the yaw attitude satellite greatly. It was easy to implement by software only and had no need to increase the system hardware.