中国空间科学技术

Chinese Space Science and Technology

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In-orbit Estimation of Satellite Mass and Center of Mass Using STLS

Lin Jiawei1,2 Wang Ping1(1 Beijing Institute of Control Engineering,Beijing 100190)(2 National Laboratory of Space Intelligent Control,Beijing 100190)   

  • Online:2010-04-25

Abstract: The structured total least norm (STLN) algorithm was used to estimate the mass and center of mass parameters.This method has three advantages comparing with the existing methods:the dynamic equations of satellites were not simplified;practically inaccurate thrust force and torque were not used in the equations,sensor noise was considered.Theoretical analysis shows that the STLS solution is maximum likelihood estimate when the sensor noise is Gaussian.Simulation confirms the usefulness of the method.