Based on Grid Reference Frame for SINS/CNS Integrated Navigation System in the Polar Regions

Abstract

As the inertial navigation system cannot meet the precision requirements of global navigation in the special geographical environment of the Polar Regions, this paper presents Strapdown Inertial Navigation System (SINS)/Celestial Navigation System (CNS) integrated navigation system of airborne based on Grid Reference Frame (GRF) and the simulation is carried out. The result of simulation shows that the SINS/CNS integrated navigation system is superior to the single subsystem in precision and performance, which not only effectively inhibits the error caused by gyro drift but also corrects the navigation parameters of system without delay. Comparing the simulation in the middle and low latitudes and in the Polar Regions, the precision of SINS/CNS integrated navigation system is the same in the middle and low latitudes and in the Polar Regions.

The covariance matrix transformation method in all-earth integrated navigation considering coordinate frame conversion

“…However, inertial navigation has accumulated errors. In order to suppress error accumulation, inertial navigation is usually aided by other navigational systems, such as the GNSS, odometers and Doppler Velocity Logs [4][5][6][7]. The above mentioned multisensor navigation system is generally called the inertial navigation-based integrated navigation system, and is the preferred choice in polar region navigation.…”

SINS/Landmark Integrated Navigation Based on Landmark Attitude Determination

“…Star sensors measure the information of astronomical object. This information can be combined and used to obtain more precise navigation results [3,4,5,6]. However, in real application, CNS is unable to work continuously throughout the day.…”