Course calibration device with tilt compensation
A heading and autocollimator technology, applied in the field of inertial navigation, can solve problems such as aircraft heading and north direction errors, and achieve the effect of simple operation
Active Publication Date: 2012-12-26
CHINA NORTH IND NO 205 RES INST
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[0003] The technical problem to be solved by the present invention is to provide a heading calibration device with tilt compensation for the aircraft navigation system in view of the problem that there is a large angular error between the aircraft heading and the north direction output by the existing aircraft navigation system
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[0014] as figure 1 As shown, the preferred embodiment of the heading calibration device of the present invention includes a north finder, an autocollimator, and a computer. The north finder adopts the JN-FNS003 north finder developed by Xi'an Jieernuo Inertial Navigation Technology Co., Ltd., which is composed of a fiber optic gyroscope and two quartz flexible accelerometers. The north finding accuracy is 0.03°, and the north finding is suitable for The misalignment angle is ±10°; the normal line of the output surface of the north finder is parallel to its output axis. The autocollimator adopts the JZ-42J optical autocollimator provided by Jeffer China Branch. Its measuring distance is 0-9 meters and the alignment accuracy is 0.5″. The computer contains DSP chip, memory, keyboard and nine-digit digital tube. The DSP chip adopts the VC33 chip produced by TI Company of the United States and has a built-in tilt compensation unit. The north finder and the autocollimator are fixe...
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The invention discloses a course calibration device with tilt compensation, and belongs to the technical field of inertial navigation. The device comprises a north seeker, an autocollimator and a computer, wherein the autocollimator and the north seeker are arranged on a baseboard, and the optical axis of the autocollimator is basically parallel to the output plane normal of the north seeker, the azimuth and a pitch angle error of the optical axis of the autocollimator relative to the output plane normal of the north seeker are pre-configured in a computer, and the computer performs compensation operation on a course angle output by the north seeker according to an inherent error between the autocollimator and the output plane normal of the north seeker and a corresponding algorithm formula, and outputs the compensated course angle to a user. The course calibration device solves the problem of inaccurate course angle caused by an error that an output axis of an inertial navigation system is not parallel to a vertical axis of a plane, and has the advantages of simple operation, high calibration accuracy and the like.
Description
technical field [0001] The invention belongs to the technical field of inertial navigation, and mainly relates to an airborne navigation system, in particular to a heading calibration device with tilt compensation for the navigation system. Background technique [0002] An aircraft equipped with a navigation system needs to know whether the output reference axis of the inertial integrated navigation system coincides with the longitudinal axis of the aircraft, and how much error exists. The method currently adopted is to ensure it through structural design and structural assembly, that is, by setting a reference reference surface on the aircraft, the normal line of which reference surface is strictly parallel to the longitudinal axis of the aircraft, when the output reference surface of the navigation system (its normal line is strictly parallel to the output axis of the navigation system) and the reference surface is fixed by screws, it is considered that the output referenc...
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IPC IPC(8): B64D45/00G01C21/16
Inventor 梁庆仟郭栓运陈文建周国良张建峰扈宇姝易科朱贞李彰邓丽娜陈颖马忠孝尹剑袁晓莹朱红
Owner CHINA NORTH IND NO 205 RES INST