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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2009, Vol. 30 ›› Issue (9): 1711-1717.
• Avionics and Autocontrol • Previous Articles Next Articles
Li Shuang
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Abstract: In this article, line-of-sight (LOS) measurement based autonomous optical relative navigation algorithms for landing spacecraft on asteroids are presented; observability analysis of the navigation algorithms is also carried out in detail. First, navigation measurement equations and measurement sensitive matrices are provided based on the colinear equation of perspective projection. Next, spacecraft position and attitude parameters are estimated using the Gaussian least square differential correction (GLSDC) algorithm and Levenberg-Marquardt (LM) algorithm by multiple line-of-sight measurements. Then, navigation system observability and observable degree with different quantitative line-of-sight measurements are analyzed in detail by rank analysis of the error variance inverse matrix. Finally, the validity of the autonomous navigation algorithms presented in this article is confirmed by mathematical simulation.
Key words: asteroid landing, line-of-sight measurement, autonomous optical relative navigation, observability
CLC Number:
V448.224
Li Shuang. Lineofsight Measurement Based Autonomous Optical Relative Navigation Algorithms for Asteroid Landing and Observability Analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2009, 30(9): 1711-1717.
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