An improved algorithm based on a semi-parametric regression model (SPRM) is proposed in this paper to achieve high accuracy pointing for electro-optical detection systems (EODSs). The error sources are analyzed comprehensively, which are mainly composed of consistency errors of the optical system, perpendicularity and rotation errors of the mechanical assembly, stability and tracking errors of the control system, etc. And then, the multi-body kinematics theory is used to structure a linear model with parameters of definite physical meaning. Subsequently, an improved SPRM model is derived to eliminate the nonlinear errors. Numerical simulations are carried out and the results demonstrate that the nonlinear interferences can be suppressed by the proposed algorithm and the identification accuracy is superior to 0.6″. Finally, an experiment based on a rotation table shows that the pointing accuracy is improved from 23.41″ to 2.00″ after the correction of error sources.
ZHANG Zhiyong, ZHOU Xiaoyao, FAN Dapeng
. Analysis,Modeling and Correction of Pointing Errors for Electro-optical Detection Systems[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(11)
: 2042
-2054
.
DOI: CNKI:11-1929/V.20110426.1113.005
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