Error Analysis and Calibration of Gyro-Stabilized Platform for Electro-Optical Pointing System

Abstract

A novel method in the solution of the pointing problem for electro-optical pointing system (EOPS) is presented in this paper. Firstly, the error sources are analyzed in detail. And then, a linear model whose parameters have definitely physical meaning is developed to improve pointing accuracy. Extensive experiments have been carried out and the results show that the system errors can be eliminated by the model effectively and the pointing accuracy of the azimuth and elevation axes have been improved from 0.4541º and 0.2959º to 0.038º and 0.031º respectively.

Pointing Error Correction for a Moving-Platform Electro-Optical Telescope Using an Optimized Parameter Model

“…The components of an electro-optical telescope (EOT) can be typically divided into functional subsystems that contribute to understanding the errors that affect pointing [26,27]. The electro-mechanical gimbal, consisting of a base, bearings, motors, actuators, etc., provides physical support and allows the motion of the axes.…”

“…However, the technique above-used for ground-based telescopes is not fully functional for MPEOT due to platform vibration and environmental disturbance. Currently, the most effective way to obtain pointing error models is by observing a group of stars in the sky region to acquire the pointing error data of the telescope at each position, including selecting stars, building mathematical models, and solving parameters [15][16][17][18][19][20][21][22][23][24][25][26][27]. The model only validly works for a while.…”

Line-of-sight rate modeling and error analysis of inertial stabilized platforms by coordinate transformation

“…Recently, inertial stabilized platforms (ISPs) have been usually installed in unmanned air vehicles or missiles in order to track or attack targets, which is of great significance in scientific, military, and commercial applications. 1–3 ISPs mainly include optical imaging system and stabilized frame. They should provide rapid and accurate rate tracking of the line-of-sight (LOS) error signals generated by the imaging sensor located in the inner gimbal.…”