A telescope automatic pointing correction method based on allan variance analysis under a moving platform

Abstract

The invention discloses an automatic telescope pointing correction method based on ALLAN variance analysis under a motion platform. The positioning precision of a telescope is relevant to the motion precision of a mechanical system and is affected by mechanical and electrical equipment and software control algorithms. With the development of electronic techniques, mechanical errors in processing and assembling are main factors affecting the positioning precision. The mechanical errors mainly include part machining errors, bearing errors, telescope assembly errors, structural deformation and the like. A photoelectric tracking system installed on the motion platform is affected by carrier motions, vibrations and the like. In addition, due to the use of inertial devices, alignment errors, drift errors of inertial sensitive devices and the like are introduced. Base on the basic principle of telescope pointing and pointing error source analysis, an automatic pointing correction model basedon ALLAN variance analysis under the motion platform is established, the correction precision and model stability are improved, and automatic pointing correction is also achieved.

Description

technical field [0001] The invention relates to the technical field of telescope pointing correction under a moving platform, in particular to an automatic pointing correction method for a telescope under a moving platform based on ALLAN variance analysis. Background technique [0002] The performance of a telescope is usually judged by its optical performance and positioning accuracy. Optical performance can be evaluated in a variety of ways, mainly considering the performance of the optical system and its application. Pointing accuracy is one of the key technical indicators of telescope positioning performance. Its accuracy not only affects target capture and aiming, but also affects the system target positioning accuracy. In severe cases, the target cannot be introduced into the tracking field of view, causing the failure of tracking observation. Positioning accuracy is related to the motion accuracy of the mechanical system and is affected by mechanical, electrical equi...

AI Technical Summary

Problems solved by technology

[0003] Compared with the photoelectric tracking system on the ground-based platform, the photoelectric tracking system installed on the motion platform will be affected by the movement and vibration of the carrier, which will cause the system's visual axis to shake and affect the imaging quality, making it difficult to extract the target and reduce the accuracy of the off-target extraction. Seriously affect tracking accuracy

Moreover, due to the use of inertial devices, some new errors will be introduced, such as alignment errors, drift errors of inertial sensitive devices, etc.

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