Misalignment angle calibration of semi-active laser seeker based on locally weighted scatterplot smoothing and interpolation method

Abstract

The accuracy of the misalignment angle affects the precision of missile systems. Owing to systematic errors and random errors, the misalignment angle measured by the seeker detector deviates from the ideal misalignment angle. To improve the accuracy of the misalignment angle, this paper proposesthe locally weighted scatterplot smoothing (Lowess) and the interpolation method to calibrate the misalignmentangle. First, the model and error analysis of the misalignment angle are presented in the paper. Second, the proposed calibration strategy based on Lowess and the interpolation method is presented. Finally, calibration experiments are carried out to verify the excellent performance of the proposed calibration strategy. The experimental results show that the proposed calibrated strategy outperforms the currently used techniques and increases the misalignment angle precision.