The invention provides an orbit control thrust adaptive calibration method based on inter-satellite distance and error compensation, and belongs to the technical field of spacecraft orbit control thrust calibration. Establishing a thrust calibration system according to the relative distance and speed of the satellite and a relative kinetic equation; establishing a state equation, an evolution equation and an observation equation by taking inter-satellite distance and relative speed information of satellites as observed quantities; selecting a sample point set and a weight value thereof, a state updating equation and an observation updating equation by using a symmetric sampling method; calculating a noise covariance adaptive matrix according to the residual covariance, and performing adaptive updating on the observation noise covariance and the system noise covariance to obtain a satellite relative orbit state estimation value; and calculating the least square solution of the satellite orbit control thrust vector according to the estimated value of the relative orbit state of the satellite to realize real-time calibration of the orbit control thrust. According to the method, the limitation of measurement and control information sources is overcome, the defect error of hardware such as an engine is made up, and the thrust calibration precision is improved.
本发明提供了一种基于星间距离和误差补偿的轨控推力自适应标定方法,属于航天器轨控推力标定技术领域。根据卫星相对距离与速度和相对动力学方程,建立推力标定系统;以卫星的星间距离与相对速度信息作为观测量,建立状态方程、演化方程和观测方程;运用对称采样方法选取样本点集及其权重值,状态更新方程和观测更新方程;根据残差协方差,计算噪声协方差自适应矩阵,对观测噪声协方差和系统噪声协方差进行自适应更新,得到卫星相对轨道状态估计值;根据卫星相对轨道状态估计值计算卫星轨控推力矢量的最小二乘解,实现轨控推力实时标定。本发明的方法克服了测控信息来源的局限性,弥补了发动机等硬件缺陷误差,提高了推力标定精度。
Orbit control thrust adaptive calibration method based on inter-satellite distance and error compensation
一种基于星间距离和误差补偿的轨控推力自适应标定方法
2024-04-09
Patent
Electronic Resource
Chinese
IPC: | B64G Raumfahrt , COSMONAUTICS |
European Patent Office | 2020
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AIAA | 2014
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