A correction method for telescope pointing error based on d-h matrix modeling under moving platform

A motion platform and pointing error technology, applied in the field of telescope pointing error correction based on D-H matrix modeling, can solve problems such as unreasonable direct application, inability to really effectively improve telescope pointing accuracy, and complex error sources, achieving good stability, Realize the effects of fast and high-precision pointing and high pointing correction accuracy

Active Publication Date: 2022-06-28
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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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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  • A correction method for telescope pointing error based on d-h matrix modeling under moving platform
  • A correction method for telescope pointing error based on d-h matrix modeling under moving platform
  • A correction method for telescope pointing error based on d-h matrix modeling under moving platform

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Embodiment Construction

[0029] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] The specific process of the telescope pointing error correction method based on D-H matrix modeling under a moving platform according to the present invention is as follows figure 1 shown, the specific steps are as follows:

[0031] (1) Observe several stars with the telescope installed on the moving platform, and record the horizontal position angle of each star, which includes the azimuth angle A n , the pitch angle E n , and record the azimuth angle A and the pitch angle E measured by the telescope to the star, and the three attitude angles of the moving platform measured by the attitude sensor, namely the heading angle H, the pitch angle P and the roll angle R;

[0032] (2) Convert the position angle of the star's horizon system into a unit direction vector in the horizon system, and then use the attitude angle information to co...

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Abstract

The invention discloses a method for correcting telescope pointing errors based on D-H matrix modeling under a moving platform. The pointing error of the telescope on the moving platform includes the system error of the telescope itself, the measurement error of the attitude sensor and the installation error between the attitude sensor and the telescope. Based on the analysis of error sources, the present invention establishes a correction model for pointing errors on a moving platform through the D-H method, including an error parameter calculation model and a guide value calculation model. The model takes all error sources into consideration at the same time, avoids the influence of error parameter coupling, and improves the pointing correction accuracy. The method of the invention first tracks multiple stars to obtain pointing data, then calculates all the error parameters in one step by using the error parameter calculation model, and then calculates the error-corrected guide value in two steps by using the target information and the guide value calculation model. The method of the invention is easy to implement, has high correction precision and stable performance, and can realize fast and high-precision pointing of the moving platform telescope.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G06F17/16G06F17/18
CPCG01C25/00G06F17/16G06F17/18
Inventor 黄永梅彭超贺东王愿康袁良柱徐杨杰
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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