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研究了基于偏航观测器的三轴稳定偏置动量对地定向卫星姿态控制问题.由于采用的红外地平仪无法测量卫星的偏航信息,提出了一种基于偏航观测器的姿态控制方案.针对俯仰回路,利用测量的俯仰角实现了俯仰回路姿态控制;滚动/偏航回路的设计由2部分组成:基于偏航观测器的PD控制器和飞轮解耦环节.整个系统采用动量轮和反作用飞轮作为执行机构,磁力矩器提供的磁矩与地磁场作用产生的力矩实现了飞轮的动量卸载.最后对卫星姿态控制系统进行了仿真研究,结果表明,所设计的控制方案在飞轮输出力矩工作范围内,可使卫星达到很高的姿态控制精度.
The problem of attitude control of three-axis stable bias satellite to the ground based on the yaw observer is studied. Because of the inability of the infrared horizon to measure the satellite’s yaw information, a attitude control scheme based on the yaw observer is proposed. For the pitch loop, the attitude control of the pitch loop is realized by the measured pitch angle.The design of the roll / yaw loop is composed of two parts: the PD controller based on the yaw observer and the decoupling part of the flywheel.The whole system uses the momentum wheel and the reaction The flywheel as the actuator, the magnetic moment provided by the magnetic torque and the torque generated by the action of the earth magnetic field can realize the unloading of the flywheel.At last, the simulation research on the satellite attitude control system is carried out. The results show that the designed control scheme Within the range, the satellite can achieve high attitude control accuracy.