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Measurement and analysis method of the residual moment of the spacecraft active load

Aiming at the problem of residual moment generated by the motion of spacecraft active loads, an improved method for measuring and calibrating it is proposed, and an on-ground residual moment measurement and calibration system based on the combination of three-dimensional force sensors and a three-axis air bearing testbed is presented for this method. The composition and working principle of the system is studied, the fixed relationship between the three-dimensional force sensors and the three-axis air bearing testbed is given, and the algorithm for measuring the residual moment of active loads is proposed. According to the algorithm, the effects of the installation error, measurement error, and measurement disturbance of the three-dimensional force sensors on the residual moment measurement accuracy are given, and the mapping relationship from different ranges and different installation errors to measurement errors of three-dimensional force sensors is studied. Theoretical and simulation analysis shows that the measurement errors of the residual moment are 0.059%, 0.064%, and 0.054%. The method is less affected by environmental interference and restrictions, with high measurement accuracy and excellent applicability.