Telescope pointing error correction method based on D-H matrix modeling under motion platform

Abstract

The invention discloses a telescope pointing error correction method based on D-H matrix modeling under a motion platform. The pointing error of a telescope on a motion platform comprises the system error of the telescope, the measurement error of an attitude sensor and the installation error between the attitude sensor and the telescope. On the basis of error source analysis, a correction model of the pointing error on the motion platform is established through a D-H method, and the correction model comprises an error parameter calculation model and a guide value calculation model. According to the model, all error sources are considered at the same time, the influence of error parameter coupling is avoided, and the pointing correction precision is improved. According to the method, firstly, multiple fixed stars are tracked to obtain pointing data, then all error parameters are calculated in one step through the error parameter calculation model, and a guide value after error correction is calculated in two steps according to target information and the guide value calculation model. The method is easy to implement, high in correction precision, stable in performance and capable of achieving rapid and high-precision pointing of the telescope on the motion platform.

Description

technical field [0001] The invention relates to the technical field of telescope pointing correction under a moving platform, in particular to a method for correcting a pointing error of a telescope under a moving platform based on D-H matrix modeling. Background technique [0002] Telescopes are widely used in astronomical observation, optical communication and other fields. It is mainly used as a photoelectric tracking device for closed-loop tracking and measurement of targets. Pointing the target with the telescope is the first step for the telescope to start working. Only high-precision pointing can ensure that the target is brought into the field of view and then closed-loop tracking. However, the telescope will inevitably have mechanical errors and assembly errors during the processing and assembly process, which will cause systematic errors in the telescope itself, resulting in a decrease in pointing accuracy. It is often very expensive to improve the pointing accura...

AI Technical Summary

Problems solved by technology

However, since the error sources of the moving platform telescope are more and more complex, and there is error coupling, it is unreasonable to apply it directly, and it cannot really effectively improve the pointing accuracy of the telescope on the moving platform

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