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A Universal Approach for Processing any MEMS Inertial Sensor Configuration for Land-Vehicle Navigation

Published online by Cambridge University Press:  20 April 2007

Xiaoji Niu ,
Sameh Nasser ,
Chris Goodall  and
Naser El-Sheimy
Xiaoji Niu
Affiliation:
(The University of Calgary, Canada) (Email: [email protected])
Sameh Nasser
Affiliation:
(The University of Calgary, Canada) (Email: [email protected])
Chris Goodall
Affiliation:
(The University of Calgary, Canada) (Email: [email protected])
Naser El-Sheimy
Affiliation:
(The University of Calgary, Canada) (Email: [email protected])
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Abstract

Recent navigation systems integrating GPS with Micro-Electro-Mechanical Systems (MEMS) Inertial Measuring Units (IMUs) have shown promising results for several applications based on low-cost devices such as vehicular and personal navigation. However, as a trend in the navigation market, some applications require further reductions in size and cost. To meet such requirements, a MEMS full IMU configuration (three gyros and three accelerometers) may be simplified. In this context, different partial IMU configurations such as one gyro plus three accelerometers or one gyro plus two accelerometers could be investigated. The main challenge in this case is to develop a specific navigation algorithm for each configuration since this is a time-consuming and costly task. In this paper, a universal approach for processing any MEMS sensor configuration for land vehicular navigation is introduced. The proposed method is based on the assumption that the omitted sensors provide relatively less navigation information and hence, their output can be replaced by pseudo constant signals plus noise. Using standard IMU/GPS navigation algorithms, signals from existing sensors and pseudo signals for the omitted sensors are processed as a full IMU. The proposed approach is tested using land-vehicle MEMS/GPS data and implemented with different sensor configurations. Compared to the full IMU case, the results indicate the differences are within the expected levels and that the accuracy obtained meets the requirements of several land-vehicle applications.

Keywords

GPS/INSMEMSVehicle NavigationPartial IMU Configurations
Type
Research Article
Information
The Journal of Navigation , Volume 60 , Issue 2 , May 2007 , pp. 233 - 245
Copyright
Copyright © The Royal Institute of Navigation 2007

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References

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