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A high integrity IMU/GPS navigation loop for autonomous land vehicle applications

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3 Author(s)
Sukkarieh, S. ; Sydney Univ., NSW, Australia ; Nebot, E.M. ; Durrant-Whyte, H.F.

This paper describes the development and implementation of a high integrity navigation system, based on the combined use of the Global Positioning System (GPS) and an inertial measurement unit (IMU), for autonomous land vehicle applications. The paper focuses on the issue of achieving the integrity required of the navigation loop for use in autonomous systems. The paper highlights the detection of possible faults both before and during the fusion process in order to enhance the integrity of the navigation loop. The implementation of this fault detection methodology considers both low frequency faults in the IMU caused by bias in the sensor readings and the misalignment of the unit, and high frequency faults from the GPS receiver caused by multipath errors. The implementation, based on a low-cost, strapdown IMU, aided by either standard or carrier phase GPS technologies, is described. Results of the fusion process are presented

Published in:

Robotics and Automation, IEEE Transactions on  (Volume:15 ,  Issue: 3 )

Date of Publication:

Jun 1999

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