Extraction algorithm for line of sight angular rate in non-Gaussian correlative noise environment

ZHANG Duo; SONG Jianmei; ZHAO Liangyu; JIAO Tianfeng; DING Guoqiang

doi:10.7527/S1000-6893.2020.24629

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 7: 324629 - 324629

DOI: https://doi.org/10.7527/S1000-6893.2020.24629

Electronics and Electrical Engineering and Control

Extraction algorithm for line of sight angular rate in non-Gaussian correlative noise environment

ZHANG Duo ,
SONG Jianmei ,
ZHAO Liangyu ,
JIAO Tianfeng ,
DING Guoqiang

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1. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China;
2. Institute of Ordnance Industry Navigation and Control Technology, Beijing 100089, China;
3. College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China

Received date: 2020-08-11

Revised date: 2020-08-31

Online published: 2020-09-24

Supported by

National Natural Science Foundation of China (12072027, 11532002)

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Abstract

To extract the Line of Sight (LOS) angular rate of a strapdown seeker with non-Gaussian noises and the correlation between the state noises and the observation noises, an Extended Set Membership Filter (ESMF) with correlated noises decoupling in a modified spherical coordinate system is proposed. An LOS angular rate extraction model in the modified spherical coordinate system is first established by normalizing the relative distance and the rate of change between the projectile and the target. The correlated noises decoupling method is then used to remove the correlated noises coupled in the observation equation, and the Taylor series expansion employed to derive the linearization expression of the decorrelation model to obtain a set of virtual noise ellipsoids containing the linearization error. Moreover, the ellipsoid for state prediction and observation update is optimized by means of minimum trace and minimum upper bound of the scale factor. The simulation results show that the ESMF can achieve good estimation precision with non-Gaussian correlated noises and realize high precision LOS angular rate extraction of the strapdown seeker.

Key words： strapdown seeker; Line of Sight (LOS) angular rate; modified spherical coordinate; set membership filter; correlated noises

Cite this article

ZHANG Duo , SONG Jianmei , ZHAO Liangyu , JIAO Tianfeng , DING Guoqiang . Extraction algorithm for line of sight angular rate in non-Gaussian correlative noise environment[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(7) : 324629 -324629 . DOI: 10.7527/S1000-6893.2020.24629

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