line-of-sight rate estimation based on ukf for strapdown seeker

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ID: 244917
2015
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Abstract
Aiming at the problem that the strapdown imaging seeker cannot measure line-of-sight (LOS) rate directly, this paper presents an effective algorithm for LOS rate estimation. To address the problem, the reference frames and angles are defined. According to the relative kinematics and attitude relationship between missile and target, the nonlinear state equations and measurement equations of LOS rate are derived, and the estimation algorithm based on unscented Kalman filter (UKF) is proposed. Considering the estimation accuracy mainly depends on body LOS (BLOS) angle accuracy and gyro accuracy, the paper is unprecedented to research how these two factors impact the LOS angle and rate accuracy by simulation. Semiphysical simulation experiment verifies the correctness and accuracy of the algorithm, and the result shows that the estimation algorithm can meet the accuracy and real-time requirements of guidance system simultaneously. Thus LOS rate estimation algorithm based on UKF provides a theoretical basis for engineering applications of strapdown imaging seeker.
Reference Key
sun2015mathematicalline-of-sight Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Tingting Sun;Hairong Chu;Baiqiang Zhang;Hongguang Jia;Lihong Guo;Yue Zhang;Mingyue Zhang
Journal journal of power sources
Year 2015
DOI
10.1155/2015/185149
URL
http://dx.doi.org/10.1155/2015/185149
Keywords
civil engineering (general)mathematics engineering (general)

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