论文部分内容阅读
随着卫星定姿精度要求的日益提高,仅用常规卫星敏感器已经不能满足高精度定姿要求,针对该问题,提出一种利用星载相机的单点成像信息进行卫星姿态确定的算法,根据相机成像原理推导出卫星姿态角与像点位置的关系,结合数字相机的特殊成像方式,建立了用误差四元数描述的线性相机测量残差模型,并给出联合常规姿态敏感器进行联合姿态确定的方案。仿真结果证明星载相机的信息的引入使得稳态姿态估计精度由0.0026°提高到0.00069,°并且加快了滤波收敛速度。
With the increasing requirements of satellite attitude accuracy, conventional satellite sensors can not meet the requirements of high-precision attitude setting. In view of this problem, a satellite attitude determination algorithm based on the single-point imaging information of spaceborne cameras is proposed. Based on the principle of camera imaging, the relationship between satellite attitude angle and image point location is deduced. Based on the special imaging method of digital camera, a linear camera residual model is constructed by using quaternion of error. Determine the program. The simulation results show that the introduction of the information from the on-board camera improves the accuracy of the steady-state attitude estimation from 0.0026 ° to 0.00069 °, and accelerates the filtering convergence speed.