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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2012, Vol. 33 ›› Issue (9): 1679-1687.

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Online Calibration of POS Error Based on Double Strapdown Algorithm

LIU Zhanchao1,2, FANG Jiancheng1,2   

  1. 1. Science & Technology on Inertial Laboratory, Beihang University, Beijing 100191, China;
    2. Key Laboratory of Fundamental Science for National Defense-Novel Inertial Instrument & Navigation System Technology, Beihang University, Beijing 100191, China
  • Received:2011-11-16 Revised:2012-01-20 Online:2012-09-25 Published:2012-09-22
  • Supported by:
    National Basic Research Program of China (2009CB724002); National Science Fund for Distinguished Young Scholars (60825305); Foundation for Innovative Research Groups of the National Natural Science Foundation of China (61121003)

Abstract: In order to improve the performance of position and orientation system (POS), a new online calibration method is proposed based on the typical uniform rectilinear motion of POS. First, an online calibration scheme based on double strapdown algorithm is designed, and the simplified system error model is introduced. Then the system error state transfer matrix is derived under medium term navigation conditions. Subsequently, online calibration of system error parameters is carried out according to the neighborhood uniform rectilinear motion navigation error of POS, and through the observability analysis of system error states, the corresponding relationship between POS motion and online calibration precision is established. Vehicle test and flight test results show that the new online calibration method proposed in this paper can effectively improve system accuracy during the normal remote sensing task of POS.

Key words: airborne remote sensing, position and orientation system, online calibration, error model, observability, double strapdown algorithm

CLC Number: