Method for evaluating stability of north orientation benchmark for inertial measurement unit calibration

A test method and stability technology, applied in aerospace, ship, inertial, aviation fields, to achieve the effect of safe operation and intuitive test curve

Active Publication Date: 2014-08-27
HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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  • Application Information

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Problems solved by technology

[0004] However, there is currently no test method for periodic testing and evaluation of northbound datums to analyze and determine the impact of various factors on northbound datum drift

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  • Method for evaluating stability of north orientation benchmark for inertial measurement unit calibration
  • Method for evaluating stability of north orientation benchmark for inertial measurement unit calibration

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Embodiment Construction

[0030] In order to make the technical solutions, functions and effects of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The following examples are illustrative only, and do not constitute a limitation to the present invention.

[0031] figure 1 It is a principle structure diagram of a north reference stability evaluation test method for inertial group calibration in this embodiment, which uses the north reference provided by the calibration site to track and test the north direction of the inertial group calibration equipment. The implementation method is to set up a A self-collimating theodolite requires the theodolite to be aligned with the right-angled prism mirror in the true north direction, that is, the theodolite line-of-sight axis is parallel to the normal direction of the mirror; at the same time, the theodolite can be aligned with the right-angled prism mirror of the...

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Abstract

The invention discloses a method for evaluating the stability of a north orientation benchmark for inertial measurement unit calibration. The method comprises the following steps: (1) measuring polaris orientation by utilizing a theodolite to acquire a true north direction, leading the true north direction to a prism on a pillar position, namely the mirror surface of a north orientation benchmark prism, and collimating; and fixing the north orientation benchmark prism on the pillar position after being collimated to serve as the north orientation benchmark; (2) leading the north orientation benchmark determined by the north orientation benchmark prism to a prism, namely a north orientation location prism, on a rotary table of inertial measurement calibration equipment by using the theodolite, and collimating the theodolite and the mirror surface of the north orientation positioning prism to take the north orientation location prism as location north orientation of the inertial measurement equipment; and (3) acquiring north orientation benchmark data for many times according to the location north orientation by using the inertial measurement equipment, and processing the data to acquire a stability evaluation test result of the north orientation benchmark. According to the method, the problem of stability monitoring of the north orientation benchmark is solved, and the technical support is effectively provide for inertial systems; the testing method is safe and reliable to carry out, and test curves are visual and accurate.

Description

technical field [0001] The invention belongs to the technical field of inertia, and in particular relates to a north reference stability evaluation test method for inertial group calibration, which is suitable for evaluating and testing the influence of various factors on north reference drift in a high-precision inertial system, so as to ensure inertial group calibration The accuracy and reliability of the data can be applied to technical fields such as aerospace, aviation, and ships. Background technique [0002] Inertial group (also known as inertial measurement combination or inertial measurement combination) is a component sensitive to acceleration and gyro angular rate, which is used to provide measurement information for guidance / navigation and other stable systems. Whether its accuracy meets the requirements of design technical indicators will be directly related to Product performance. The accuracy of the true north reference provided by the calibration system is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C21/16G01C25/005
Inventor 王怡妹张喜庆王亮胡宏焱罗喜唐平张正玺
Owner HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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