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See detailUncertainty Aware Sensor Fusion for a GNSS-based Collision Avoidance System
Katriniok, A.; Maschuw, J.; Abel, D. et al

in Institute of Navigation (Ed.) Proceedings of the 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011) (2011, September 19)

The performance that can be achieved by safety critical systems which are based on information on their absolute position inherently depends on the accuracy and the update rate that is provided by the ... [more ▼]

The performance that can be achieved by safety critical systems which are based on information on their absolute position inherently depends on the accuracy and the update rate that is provided by the navigation system. A Collision Avoidance System (CAS) that is intended to prevent collisions between vehicles by an autonomous braking resp. evasion maneuver is such a safety critical system and will be subject of consideration in this paper. In this context, the employed sensor fusion algorithm that provides a navigation solution with high update rate based on an inertial navigation system (INS) as well as on a Global Navigation Satellite System (GNSS) will be presented. Furthermore, a method to assess the actual accuracy provided by GNSS resp. sensor fusion will be introduced. Subsequently, the paper shows how this information can be incorporated into sensor fusion. Obviously, the feasibility of CAS inherently depends on the accuracy that can be obtained from GNSS. Therefore, CAS will be developed and tested in a terrestrial Galileo test and development environment (GATE) near Aachen (Germany) where a positional accuracy of about 0.8 meters can be achieved. Finally, first simulation results based on measurement data will be presented to evaluate the sensor fusion algorithm as well as the method to assess the actual navigation accuracy. [less ▲]

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