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Inertial measurement redundancy system and calibration method

A technology of inertial measurement and calibration method, which is applied in the field of inertial measurement, can solve problems such as complexity and cumbersome calibration procedures, and achieve the effect of reducing costs and improving the efficiency of calibration

Active Publication Date: 2021-10-22
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the defects existing in the prior art, the object of the present invention is to provide a redundant system and calibration method for inertial measurement, which mainly solves the problem of cumbersome and complicated calibration procedures in the related art

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  • Inertial measurement redundancy system and calibration method

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specific Embodiment

[0062] S1. Set up two sets of three-automatic inertial groups side by side in cabin section 3: the first inertial group 1 and the second inertial group 2, and initialize and reset the first inertial group 1 and the second inertial group 2 to obtain the first inertial group 1 The base coordinate system X 1 Y 1 Z 1 and the base coordinate system X of the second inertial group 2 2 Y 2 Z 2 . Power off the inertial group afterwards, and the cabin section 3 is hoisted to the top of the rolling frame car 4.

[0063] It should be noted that the top of the roll-off rack vehicle 4 is provided according to image 3 Parts that roll in the roll direction shown. It can drive the compartment located on the roll-on vehicle 4 to overturn.

[0064] S2. Flip the cabin section 3, and obtain the first output data and the second output data by measuring the output data of the two positions before and after the flip of the inertial measurement system.

[0065] Specifically, see image 3 Sh...

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Abstract

The invention discloses an inertial measurement redundancy system and a calibration method, and relates to the technical field of inertial measurement. The method comprises the following steps: arranging two sets of three-self-inertia assemblies with transposition mechanisms and sensitive assemblies side by side; determining the relative position relation of the two inertial measurement units through calibration of two position systems; rotating one set of inertial measurement unit sensitive assembly to a preset angle to be obliquely arranged and locked; and obtaining sensitive information for redundancy judgment or reconstruction. The three-self-inertia unit with the transposition mechanism is adopted, the applicability is high, the inertia unit does not need to be customized, batch production can be carried out, and the cost is reduced; and according to the scheme, a complex calibration process does not need to be implemented, and the relation between the two inertial measurement units can be determined only through simple two-position system calibration. According to the scheme, the sensitive assembly can be obliquely arranged at any accurate angle, and required sensitive information is provided for fault detection of the inertial measurement system.

Description

technical field [0001] The invention relates to the technical field of inertial measurement, in particular to a redundant system and calibration method of inertial measurement. Background technique [0002] In recent years, the inertial measurement combination has gradually become the core equipment in high-precision fields such as aircraft and rockets. It is usually composed of gyroscopes, accelerometers and related processing circuits. The angular velocity of the body axis, and output the measurement results to the rocket-borne computer for navigation and attitude calculation, so as to realize the guidance and stability control of the launch vehicle. [0003] Influenced by vibration, shock and other operating environments, inertial devices are prone to reduced reliability or even failure, which directly affects the flight reliability of launch vehicles. Limited by the production technology level of inertial devices, in order to improve the reliability of inertial measurem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/16G01C25/00
CPCG01C21/16G01C25/005
Inventor 邵志浩丁波杜鹏宋长哲何健伟胡华峰许卫国徐娅王佳丽石妙
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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