Title :
Star sensor based spacecraft angular rate estimation independent of attitude determination
Author :
Pal, Monalisa ; Bhat, M.S.
Author_Institution :
Dept. of Aerosp. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
A star sensor based new method for estimation of satellite angular rates through derivative approach is proposed. The method is based on “optic flow” of star image patterns formed on a star sensor array. The satellite angular rates are derived directly from the 2D-coordinates of star images. Therefore, the proposed algorithm is computationally efficient in the category of vector derivative approach, where there is no need for star identification. The noisy character of estimated angular rates is alleviated by employing a simple linear time invariant Kalman Filter.
Keywords :
Kalman filters; aerospace computing; angular velocity measurement; attitude measurement; image sequences; sensor arrays; space vehicles; stars; vectors; attitude determination; linear time invariant Kalman filter; optic flow; star identification; star image 2D-coordinates; star image pattern; star sensor array; star sensor based spacecraft angular rate estimation; vector derivative approach; Approximation methods; Cameras; Extraterrestrial measurements; Optical imaging; Optical sensors; Satellites; Vectors;
Conference_Titel :
Control Applications (CCA), 2013 IEEE International Conference on
Conference_Location :
Hyderabad
DOI :
10.1109/CCA.2013.6662812
