Method and device for correcting magnetic deviation
A magnetic difference and azimuth angle technology, applied in the field of magnetic difference correction methods and devices, can solve problems such as inaccurate data, insufficient calibration, track error, etc., and achieve the effect of avoiding inaccurate calculation results of track restoration and avoiding errors
Active Publication Date: 2021-09-07
ZHUHAI XIANG YI AVIATION TECH CO LTD
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Problems solved by technology
Moreover, because the instrumentation equipment on the aircraft may have inaccurate data (for example, no calibration, or insufficient calibration) or incorrect decoding may cause errors (for example, the data after the decimal point is lost), so even if the correct magnetic difference is entered manually, It will also bring a lot of error to the calculation of the track.
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[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0027] It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the ter...
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The invention discloses a magnetic difference correction method and device, which relate to the technical field of flight data processing and are used for: obtaining the first parameter and the second parameter of the track to be restored; extracting the starting point and the end point of the track to be restored The first longitude and latitude; calculate the first azimuth of the starting point and the ending point according to the first longitude and latitude of the starting point and the first longitude and latitude of the ending point; determine the reference point of the track to be restored; take the reference point as the center, according to the second parameter respectively Perform recursive calculations on the two directions before and after the reference point to obtain the second longitude and latitude of the starting point and the ending point; calculate the second azimuth of the starting point and the ending point according to the second longitude and latitude of the starting point and the second longitude and latitude of the ending point; Magnetic variation is calculated for the first azimuth and the second azimuth. The beneficial effects of the present invention are: there is no need to manually input the magnetic difference value, avoiding the error caused by the change of the magnetic difference value with the region and / or time to the calculation of track restoration, and avoiding the navigation error caused by the inaccurate input magnetic difference value. The trace restoration calculation result is inaccurate.
Description
technical field [0001] The invention relates to the technical field of flight data processing, in particular to a method and device for correcting magnetic variation. Background technique [0002] In the process of visual restoration of the flight process using the QAR data after the flight of the aircraft, the calculation and restoration of the aircraft's track is one of the key technologies. In the existing track calculation methods, parameters such as aircraft heading, speed and altitude are often used for integration. The heading recorded in the aircraft's on-board equipment DAR or FDR is the aircraft's magnetic heading, which needs to be converted into the aircraft's true heading by adding the magnetic difference of the aircraft's current position. Since the magnetic variation has different values in different regions, and with the passage of time, the magnetic variation in the same region changes every year. Therefore, in the conventional aircraft track restoration,...
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IPC IPC(8): G01P13/02G01P21/00
CPCG01P13/025G01P21/00
Inventor 杨实黄智豪郝德月王治宇郭浩彬苏剑飞吴坤永胡婕
Owner ZHUHAI XIANG YI AVIATION TECH CO LTD