Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Attitude maintenance method of strapdown inertial group during long-term standby in vehicle environment

A technology of attitude maintenance and team leader, applied in the direction of attitude control, etc., to achieve the effects of suppression, high anti-interference, and overcoming divergence errors

Active Publication Date: 2018-12-21
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments show that on this basis, the estimation of attitude drift angle using the initial alignment Kalman filter can only maintain the accuracy in a short time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Attitude maintenance method of strapdown inertial group during long-term standby in vehicle environment
  • Attitude maintenance method of strapdown inertial group during long-term standby in vehicle environment
  • Attitude maintenance method of strapdown inertial group during long-term standby in vehicle environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further introduced below in conjunction with the drawings.

[0035] According to the principle of the platform compass, the compass system constructed according to this principle is a typical stable system, and its attitude error is small and will not increase with time. Using this feature of the platform compass principle, the platform compass loop method is applied to the attitude accuracy maintenance of the strapdown inertial system for a long time warm standby, which can meet the attitude accuracy maintenance problem during the long heat standby process. The strapdown system can continue to work in the compass state after the initial alignment, and continue to maintain a precise and stable attitude angle output; it can achieve the effect of continuously maintaining the aiming accuracy of the on-board weapon strapdown inertial system during long-term hot standby.

[0036] The coordinate system used in the present invention is defined as follo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an attitude holding method of a strapdown inertial measurement unit in a long-time standby process under vehicular environment. The method comprises: acquiring angular rate [omega]ib output by a strapdown inertial measurement unit gyro and specific force f output by a strapdown inertial measurement unit accelerometer; calculating according to the specific force f and compass loop network computing parameters to obtain attitude holding mathematics platform adjusting instrument angular rate [omega]c; calculating attitude variation angular rate [omega]nb according to the angular rate [omega]ib and the adjusting instrument angular rate [omega]c; using the attitude variation angular rate [omega]nb to update and calculate attitude quaternion vector Q, and updating and calculating a platform attitude matrix Cb<n> according to the updated and calculated attitude quaternion vector Q, and using the updated and calculated platform attitude matrix Cb<n> to calculate pitching, rolling, and orientation attitude angles [phi], [gamma], and [psi]. The method can continuously maintain stable and accurate attitude angle output under shaking vehicle environment, and the method has higher attitude holding interference immunity.

Description

Technical field [0001] The invention relates to a method for maintaining the posture of a strapdown inertial group during long-term standby in a vehicle-mounted environment. Background technique [0002] In order to ensure the accuracy of strikes, precise aiming is a key link before the launch of vehicle-mounted missile weapons, which takes a certain amount of time to complete. With the increase in the use time of one-time power-on of the vehicle-mounted weapon strapdown inertial unit, how to maintain precise aiming accuracy during the long-term warm standby process is an important research problem. [0003] The hot standby environment is generally a quasi-static base environment. Vehicle body vibration and personnel walking cause the vehicle-mounted weapon inertia to shake, and the previous aiming results cannot be used directly in the hot standby process. In order to ensure the rapid response capability of the weapon, an algorithm is needed to keep the alignment accuracy of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/08
Inventor 张义张华明姚寅伟佟卫平杨俊峰李彦
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com