Error Analysis and Compensation of Roll-Pitch Semi-Strapdown Photo-Electricity Stabilized Platform

In order to improve the pointing accuracy of roll-pitch semi-strapdown photo-electricity stabilized platform, a method for error modeling and parameter calibration of stabilized platform is proposed. Based on the mechanical structure characteristics of the roll-pitch seeker, the main error sources of the stabilized platform are analyzed. Established the linear error model of the misalignment angle by using the coordinate transformation method and Taylor formula, and designed a method to improve the line-of-sight measurement accuracy of the stable platform by compensating the misalignment angle error. The least square method is used to design the calibration method of error parameters. The simulation results show that the error parameter calibration method can effectively calibrate the error parameters, and the method of compensating the misalignment angle error through the misalignment angle linear error model can significantly improve the line of sight pointing measurement accuracy of the stabilized platform.