Spacecraft shading device combined navigation methods based on multi-information amalgamation
A technology of multi-information fusion and integrated navigation, applied in the field of spacecraft integrated navigation
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[0081] The satellite autonomous navigation system based on multi-information fusion is composed of four subsystems and a main filter. As shown in Fig. 1, the specific implementation method of the present invention is as follows:
[0082] 1. Establish a satellite motion state equation based on orbital dynamics
[0083] (1) Establish the satellite orbit dynamic equation with the sun and moon perturbation
[0084] In the J2000.0 geocentric inertial system, the satellite orbit dynamic equation (system state equation) is
[0085] X=f(X,t)+W(t) (1)
[0086] In the formula, X = [x, y, z, v x , V y , V z ] T Is the state variable, x, y, z, v x , V y , V z They are the position and velocity of the satellite in the X, Y, and Z directions. The form of f(X,t) depends on the perturbation set by the satellite. When only considering the perturbation of the shape of the earth in the J2 term and the three-body gravitation of the sun and the moon,
[0087] f ...
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