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Method and system for scanning mode trajectory planning in motion of large aperture radio telescope

A radio telescope and scanning mode technology, which is used in telescopes, complex mathematical operations, data processing applications, etc., can solve the problems of discontinuous feed terminal speed and low effective utilization of scanning trajectories, and achieve the effect of improving effective utilization.

Active Publication Date: 2021-05-25
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, that is, the speed discontinuity and the low effective utilization rate of the scanning trajectory caused by the frequent and rapid change of speed and direction of the feed terminal during the sky scanning process of the OTF scanning mode of the large-aperture radio telescope, The invention provides a method for planning a trajectory of a scanning mode in the motion of a large-aperture radio telescope, the method comprising:

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  • Method and system for scanning mode trajectory planning in motion of large aperture radio telescope
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  • Method and system for scanning mode trajectory planning in motion of large aperture radio telescope

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[0068]The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, not to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0069] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0070] The OTF scanning mode can be divided into the following according to the different scanning directions: Figure 4 Scan along the right ascension direction and as shown Figure 5 In the shown scanning along the declination direction, because the OTF scanning modes along the tw...

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Abstract

The invention belongs to the field of motion control of large-diameter radio telescopes, and specifically relates to a scanning mode trajectory planning method and system during the motion of large-diameter radio telescopes, aiming to solve the speed discontinuity and scanning caused by frequent and rapid changes in speed and direction of large-diameter radio telescopes. The problem of low effective utilization of the trajectory. The present invention includes: based on the scanning parameters of the sky area, initializing the right ascension and declination positions and velocities at the start and end of each scanning segment to be planned; ‑Time space-time Bezier curve equation; aim at the minimum curvature of the curve, integrate the trajectory of the normal scanning segment, and obtain the complete trajectory of right ascension and declination of the scanned sky area in the celestial coordinate system; convert and obtain the feed terminal in the earth east‑north‑celestial coordinate system The planned running trajectory of . The OTF scanning speed of the invention is continuous, the impact on the system is small, there is no pause process in the planned track, and the effective utilization rate of the scanning track is improved.

Description

technical field [0001] The invention belongs to the field of motion control of large-diameter radio telescopes, and in particular relates to a scanning mode track planning method and system during the motion of large-diameter radio telescopes. Background technique [0002] Five-hundred-meter Aperture Sphericalradio Telescope (FAST, Five-hundred-meter Aperture Sphericalradio Telescope) is the world's largest single-aperture spherical radio telescope independently built by my country, such as image 3 shown. As one of the six major systems of the FAST project, the FAST feed source support system is composed of a six-cable traction parallel mechanism, an AB-axis rotation mechanism and a Stewart parallel mechanism. Its duty is to position the feed source terminal to the active reflector for fitting on time and accurately The focus position of the paraboloid, and make the feed terminal point to a specific direction. For different astronomical observation tasks, FAST currently in...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/11G06Q10/04G02B23/00
CPCG02B23/00G06F17/11G06Q10/047
Inventor 邓赛范俊峰吴正兴周超景奉水谭民
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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