A Rotational Strapdown Inertial Navigation Rotational Data Synchronization Strategy

A strapdown inertial navigation and rotation data technology, applied in the field of inertial navigation, can solve the problems of reducing the reliability of inertial navigation and the decline of inertial navigation accuracy, and achieve the effect of eliminating influence, improving reliability and navigation performance

Active Publication Date: 2020-02-21
TIANJIN NAVIGATION INSTR RES INST
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Problems solved by technology

However, whether it is a rotation or a flip scheme, there is a problem of data synchronization between the rotating measurement mechanism and the inertial element. If the data is not synchronized, it will not only reduce the accuracy of the inertial navigation, but also reduce the reliability of the inertial navigation. Therefore, the rotation measurement mechanism and the inertial element Synchronization between data is critical for rotary strapdown inertial navigation

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  • A Rotational Strapdown Inertial Navigation Rotational Data Synchronization Strategy
  • A Rotational Strapdown Inertial Navigation Rotational Data Synchronization Strategy
  • A Rotational Strapdown Inertial Navigation Rotational Data Synchronization Strategy

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Embodiment Construction

[0021] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0022] A rotary data synchronization strategy for strapdown inertial navigation, such as figure 1 shown, including the following steps:

[0023] Step 1. The inertial navigation equipment is powered on, initialized and performs rough alignment. The specific method is:

[0024] (1) The inertial navigation equipment is powered on, and the two rotating shafts rotate to their respective zero positions according to the preset control command;

[0025] (2) Staple the initial position, complete the rough alignment process according to the preset rough alignment scheme, and obtain the rough alignment result.

[0026] Step 2. Two-axis rotation modulation fine alignment and data synchronization adjustment.

[0027] (1) The inertial navigation enters the stage of fine alignment, and begins to rotate periodically with eight or sixteen sequences;

[0028] (2...

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Abstract

The invention relates to a rotation type strapdown inertial navigation spin data synchronization strategy. The technical characteristics are that the strategy comprises the following steps: step 1, initializing electricity of an inertial navigation device and conducting coarse alignment; step 2, modulating fine alignment through biaxial rotation and conducting data synchronization adjustment; and step 3, getting a true value of a rotating mechanism and outputting a fine alignment result. According to the rotation type strapdown inertial navigation spin data synchronization strategy, measured data of the rotating mechanism is synchronized with data between inertia elements. By adjusting a (m) plus b (v) plus c (t) coefficient, inertial navigation internal data is fully synchronized, a function of rotation type strapdown inertial navigation spin data synchronization is realized, an inertial element error effect on the navigation is eliminated, and the inertial navigation system reliability and the navigation performance are further improved.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation, in particular to a rotation data synchronization strategy of a rotary strapdown inertial navigation. Background technique [0002] The error of the internal inertial components (gyroscope and accelerometer) of the strapdown inertial navigation system is the main determinant of the error of the inertial navigation system. The purpose of the rotation mechanism in the single / dual-axis rotary inertial navigation system is to allow the errors caused by the constant drift of the inertial elements to cancel each other out in a rotation period. The corresponding technology is also called the system error averaging technology. It is widely used in the current optical gyro inertial navigation system. There are two compensation methods for inertial components: one is to use high-precision drift error compensation software, and the other is to use systematic flip or rotation compensation. The s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/16G01C25/00
CPCG01C21/16G01C25/005
Inventor 赵云旭侯斌王东升王兴全范玮
Owner TIANJIN NAVIGATION INSTR RES INST
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