Small satellite autonomous navigation system based on starlight/ geomagnetism integrated information and navigation method thereof
A combination of information and starlight technology, applied in the field of integrated navigation, can solve the problems of low measurement accuracy of magnetometer and large error of geomagnetic navigation
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[0108] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0109] The present invention proposes a small satellite autonomous navigation system and its navigation method based on combined starlight / geomagnetism information, such as figure 1 As shown, the design of the autonomous navigation system is divided into orbit determination and attitude determination. The system state equation is established according to the orbital dynamics model and the attitude dynamics model of the satellite; the starlight vector (L m1 , L m2 and L m3 ), the starlight vector and the geomagnetic vector measured by the magnetometer (B m ), the measured value of the geomagnetic vector (B m ) and the estimated value The difference (ΔB) is used as the system observation; the UKF filter algorithm is used to estimate the orbit and attitude parameters of the satellite to realize the autonomous navigation of the small satellite.
[0110] A ...
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