|Table of Contents|

Loose navigation state algorithm of INS two-point calibration in horizontal damping state(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2013年02期
Page:
99-105
Research Field:
交通信息工程及控制
Publishing date:

Info

Title:
Loose navigation state algorithm of INS two-point calibration in horizontal damping state
Author(s):
XIA Wei-xing1;  YANG Xiao-dong2;  SHI Wen-ming2;  WANG Wang2
1. No.3 Brigade of Graduate, Navy Submarine Academy, Qingdao 266042, Shandong, China; 2. Department of Navigational Instrument, Navy Submarine Academy, Qingdao 266042, Shandong, China
Keywords:
loose navigation state algorithm;  navigation state constraint;  two-point calibration;  extended state observer;  platform misalignment angle;  horizontal damping state
PACS:
U666.1
DOI:
-
Abstract:
In order to satisfy high-accuracy navigation and improve comprehensive calibration accuracy, a INS two-point calibration loose navigation state algorithm in horizontal damping state was designed by using extended state observer(ESO). The principle of traditional two-point calibration, navigation state constraint and its shortage were analyzed. The platform horizontal misalignment angles of inertial navigation system were real-timely estimated by using ESO, and traditional two-point calibration was introduced. The algorithm was simulated and numerically verified. Verification result indicates that the estimation result of traditional two-point calibration considerably reduces and even diverges when navigation state constraint can not be satisfied, neverthelessly, loose navigation state algorithm has a stronger applicability not only to reduce restrictive navigation state, but also to improve comprehensive calibration accuracy. Gyro drifts for east, north and position in experiment 1 reduce from 33.5%, 51.2%, 17.9% to 8.0%, 1.8%, 3.1% respectively, and in experiment 2, the drifts reduce from 83.7%, 39.7%, 77.5% to 2.3%, 0.3%, 1.0% respectively. 2 tabs, 9 figs, 18 refs.

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Last Update: 2013-05-20