Övers. av: Noggrann satellitbaserad fordonspositionering med lågkostnadskomponenter

The long term goal of the work has been to realize highly accurate satellite based vehicle positioning based on low cost components. The project has been focused on evaluating if a RTK-GNSS-system based on a low cost single channel GNSS receiver, paired with the existing SWEPOS land based survey stations, can reach a positioning accuracy of ±30 cm in a heavy duty vehicle. The performance level has been evaluated during on-road driving at 80 km/h. The measurements have been conducted on highway E4 south of Södertälje. To achieve the goals a vehicle model, method for connection to the CAN network in the heavy duty vehicle, and a communications solution for exchanging data with SWEPOS have been developed. All these activities were carried out in accordance with the project plan. However, fine-tuning and final operationalization of the complete system proved to be significantly more resource intensive than planned. The final result with regard to GNSS positioning precision was very good. Future work is however required on the vehicle model and inertial navigation based dead reckoning solution. Particularly the movements of the vehicle cab, which were not modelled in this project, proved troublesome. Improvements are also possible from using better sensors in the inertial navigation. The targets in this area are still seen as realistic to achieve with the given bill of material limitations, but will require additional work in close collaboration between vehicle and positioning experts.