Journal
CHINESE JOURNAL OF AERONAUTICS
Volume 27, Issue 4, Pages 986-993Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2014.03.005
Keywords
Accelerometer; Attitude determination; Gauss-Newton algorithm; Magnetometer; Measurements
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For the vector attitude determination, the traditional optimal algorithms which are based on quaternion estimator (QUEST) measurement noise model are complicated for just two observations. In our application, the magnetometer and accelerometer are not two comparable kinds of sensors and both are not small field-of-view sensors as well. So in this paper a new unit measurement model is derived. According to the Wahba problem, the optimal weights for each measurement are obtained by the error variance researches. Then an improved quaternion Gauss-Newton method is presented and adopted to acquire attitude. Eventually, simulation results and experimental validation employed to test the proposed method demonstrate the usefulness of the improved algorithm. (C) 2014 Production and hosting by Elsevier Ltd. on behalf of CSAA & BUAA.
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