Abstract:In order to achieve the stability tracking of the spatial dynamic target, a high-precision double gimbals servo system is introduced and its pointing accuracy is improved by the calibration experiment. The resolver is used as the angle position sensor in the servo system which can realize the steady tracking of the far-field target by the laser rangefinder and the camera. The pointing accuracy of the servo system is measured by using the high-precision single-axis turntable, laser rangefinder and plane mirror. For the geometric error of servo system, the sampled data is fitted by sectional line and written into the control program. The measurement data is segmented and positioned, and is corrected by fitting the straight line parameters. The experimental results show that the pointing accuracy of double gimbals servo system has reached 16". This method can effectively improve the pointing accuracy of the servo system.