Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (8): 2273-2281.doi: 10.12305/j.issn.1001-506X.2021.08.29

• Guidance, Navigation and Control • Previous Articles     Next Articles

Spacecraft integrated attitude determination method based on improved factor graph model

Bing HUA*, Yingying LIANG, Rui NI   

  1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211000, China
  • Received:2020-10-19 Online:2021-08-01 Published:2021-08-05
  • Contact: Bing HUA

Abstract:

Spacecraft attitude determination is the key to spacecraft attitude and orbit control and on-orbit normal operation. In view of the problem of the non-Gaussian distribution of measurement noise of spacecraft multi-sensors, and the problem of possible sensor failures and malfunctions, the spacecraft integrated attitude determination method based on improved factor graph model is proposed. By establishing a factor graph model, the geomagnetism/star sensitivity/gyro measurement information is added to the factor graph model as a factor node, and the observation data set is refined and adaptively adjusted by the observation distillation method for realizing the attitude determination of the spacecraft. Under the complex conditions, this method has strong scalability, can realize plug-and-play, reasonably and fully utilize other attitude measurement information, and avoid the complex system reconstruction process based on Kalman filter algorithm, which is beneficial to multi-sensor fusion. The experimental results show that the algorithm can improve the accuracy of attitude determination using magnetometer/star sensor/gyro, which has better dynamic stability, and realizes plug and play. This method is highly flexible and provides a new idea for solving the multi-sensor fusion for spacecraft attitude determination under complex conditions.

Key words: spacecraft attitude determination, factor graph, star sensor, magnetometer

CLC Number: 

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