改进的GPS/INS组合导航选星算法

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2001, Vol. 22 ›› Issue (3): 286-288.

IMPROVED ALGORITHM OF SELECTED SATELLITE USED IN GPS/INS INTEGRATED NAVIGATION SYSTEM

HUANG Ji-xun, WANG Yan-dong, FAN Yue-zu

Department of Automatic Control, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

Received:2000-04-28 Revised:2000-08-20 Online:2001-06-25 Published:2001-06-25

Abstract

Abstract:

Based on the existing algorithm of selected satellites used in GPS positioning, an improved algorithm is presented. It's more adapted to the integrated navigation system of GPS/INS. The novelty lies in that the effect of the satellite elevation and azimuth on the observability of Kalman filter is taken into account in this algorithm. It can avoid weakening the observability of Filter induced by the decrease of relevancy between measurement and state. Thus it can ensure the stability of Kalman filter.

Key words: global po sitioning sy st em( GPS), iner tial navigation system( INS), Kalman filter

HUANG Ji-xun;WANG Yan-dong;FAN Yue-zu. IMPROVED ALGORITHM OF SELECTED SATELLITE USED IN GPS/INS INTEGRATED NAVIGATION SYSTEM[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2001, 22(3): 286-288.

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IMPROVED ALGORITHM OF SELECTED SATELLITE USED IN GPS/INS INTEGRATED NAVIGATION SYSTEM

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