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Initial alignment method and device of an inertial navigation system

An initial alignment, inertial navigation system technology, applied in the field of navigation, can solve the problem of long alignment time in the fine alignment process, and achieve the effects of improving alignment accuracy, shortening fine alignment time, and improving alignment speed

Active Publication Date: 2020-02-18
NO 717 INST CHINA MARINE HEAVY IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this patented technology involves improving the efficiency and performance of an in-motion navigational (INM) system by aligning its components accurately with each other during flight phases or when performing certain tasks such as landing operations. This helps reduce delays caused by initial position adjustment for better orientation control over spacecraft's motion.

Problems solved by technology

This patented describes two main problem areas: firstly, it highlights how accurate an orientation reference (orientation) for navigational systems can be determined by initially aligning them correctly before use or during operation; secondly, there may also exist issues related to improving upon this alignment method through better visibility from outside sources like radar signals.

Method used

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  • Initial alignment method and device of an inertial navigation system
  • Initial alignment method and device of an inertial navigation system
  • Initial alignment method and device of an inertial navigation system

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Embodiment Construction

[0019] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work belong to the protection scope of the present invention. The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention, not to limit the scope of the present invention.

[0020] The term "comprising" and other expressions with similar meanings in the description or claims of the p...

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Abstract

The invention provides an initial alignment method and device of an inertial navigation system. The method comprises the steps: carrying out coarse alignment on an inertial navigation system and thencarrying out Kalman filtering alignment according to a normal sampling rate and a navigation calculation rate; carrying out reverse navigation calculation and reverse Kalman filtering alignment on stored inertia original data before alignment ending; and performing reverse alignment till an initial coarse alignment moment and carrying out forward filtering alignment according to the stored inertiaoriginal data. According to the invention, a problem of long initial alignment time of the existing inertial navigation system is solved; azimuth error estimation convergence can be accelerated; andthe alignment time can be shortened.

Description

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Claims

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Application Information

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Owner NO 717 INST CHINA MARINE HEAVY IND GRP
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