DocumentCode :
1872377
Title :
An on-orbit calibration system for satellite attitude control
Author :
Chen, Xueqin ; Wang, Feng ; Geng, Yunhai ; Zhang, Yingchun
Author_Institution :
Res. Center of Satellite Technol., Harbin Inst. of Technol.
fYear :
2006
fDate :
19-21 Jan. 2006
Lastpage :
435
Abstract :
To ensure the long-term on-orbit working precision of attitude sensors, a new approach for the high-precision three-axis stabilized satellite with the typical inertial/stellar measurement mode is presented. This approach employs a real-time on-orbit calibration system to estimate the measurement error of gyro by star sensor. The calibration system is achieved by using a second-order nonlinear filter in a closed-loop satellite attitude control system. Considering the error sources during the attitude measurement, a model of gyros misalignment, scale factor error and drift is constructed to compensate the corresponding errors. Comparing with the attitude control system without on-orbit calibration, this approach provides more attitude measurement information for satellite attitude determination and correction. The computation quantity is small and response time is short. Simulation results indicate that the real-time on-orbit calibration system is extremely effective in improving the attitude pointing accuracy and stabilization
Keywords :
artificial satellites; attitude control; attitude measurement; calibration; closed loop systems; error correction; measurement errors; stability; attitude measurement; attitude sensors; attitude stabilization; closed loop system; error sources; gyros misalignment model; inertial measurement mode; measurement error; on-orbit calibration system; satellite attitude control; scale factor drift; scale factor error; second-order nonlinear filter; star sensor; stellar measurement mode; three-axis stabilized satellite; Attitude control; Calibration; Computational modeling; Delay; Measurement errors; Nonlinear filters; Position measurement; Real time systems; Satellites; Sensor systems;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Systems and Control in Aerospace and Astronautics, 2006. ISSCAA 2006. 1st International Symposium on
Conference_Location :
Harbin
Print_ISBN :
0-7803-9395-3
Type :
conf
DOI :
10.1109/ISSCAA.2006.1627658
Filename :
1627658
Link To Document :
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