A method for identifying navigation stars in a daytime environment
An identification method and navigation star technology, applied in astronomical navigation, instruments, measuring devices, etc., can solve the problems of low cost, low precision requirements and high precision of inertial navigation equipment, so as to reduce requirements, improve accuracy rate, and simple detection background Effect
Active Publication Date: 2019-08-09
BEIJING INST OF CONTROL ENG
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[0009] The technical problem solved by the present invention is to overcome the deficiencies of the prior art, provide a navigation star identification method in daytime environment, and solve the problem of navigation star identification when the number of observation stars in the field of view of the star sensor is small in daytime environment , and the precision requirements for inertial navigation equipment are low, the method is simple, high efficiency, low cost and high precision
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[0044] The navigation star identification method solves the problem that the number of star points on the imaging plane is small due to the daytime environment, and the traditional star catalog matching method cannot be used for navigation star identification, and the navigation star can be accurately identified. The star sensor using this method reduces the requirements of the integrated navigation system for the accuracy of inertial navigation, and does not need to rely on high-precision inertial navigation to predict the imaging position of the navigation star without affecting the accuracy of system navigation. This method can be applied to the star sensors of various platforms that extract a small number of star points in the daytime environment, and can also be directly applied to the night situation to achieve true all-day orientation.
[0045] like Figure 4 As shown, a daytime environment navigation star identification method comprises the following steps:
[0046] (...
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The invention relates to a method for navigational star recognition in daytime environment. The method comprises the following steps: (1) designing a star catalog in two parts of a navigational start catalog and a near star angular distance catalog, wherein the navigational star catalog comprises fixed start information of which instrumental magnitude is higher than sensitivity, the number of fixed stars near a navigational star and an offset address of the near star angular distance catalog, and the near star angular distance catalog comprises near star information, the angular distance between the navigational star and near stars, and the angular distance between every two near stars; and (2) in the recognition process, searching the navigational star catalog and the near star angular distance catalog, recognizing a viewing star, and according to the number of stars surrounding the navigational star, judging the viewing star by different methods, and completing the recognition of the viewing start according to three situations that no near star exits near the navigational star, only one near star exists near the navigational star, and two or more near stars exist near the navigational star. According to the method disclosed by the invention, the problem of navigational star recognition when the number of the viewing stars within a view field range of a star sensor in the daytime environment is small is solved, and the accuracy requirement for inertial navigation equipment is low.
Description
technical field [0001] The invention relates to a method for star point identification of a star sensor, especially for the star point identification of an all-time star sensor in a daytime environment, and designs a method for star list screening and angular distance matching to realize the use of star points in a daytime environment. A small number of star points on the imaging plane are used for navigation star identification. Background technique [0002] The starlight / inertial navigation system includes star sensors and inertial navigation equipment, and measures the attitude of the aircraft by observing the stars. The star sensor can correct the positioning error of the inertial navigation and the drift error of most gyroscopes after processing the data obtained by measuring the navigation star. This system can be applied to aircraft, ballistic missiles, and satellites, which can greatly improve the positioning of the aircraft. Attitude accuracy. The star sensor is i...
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IPC IPC(8): G01C21/02G01C25/00
CPCG01C21/02G01C25/005
Inventor 孙秀清王立徐卿李全良李晓
Owner BEIJING INST OF CONTROL ENG