Vehicle Navigation System Study And Development Based On GPS And GIS

In the last decade, considerable effort has been devoted to the research of Unmanned Aerial Vehicle, UAV, due to the prospect of various applications. Recent advances in computing, sensing, communication and battery technology have made unmanned vehicle technology a viable option in both military and commercial applications. Our project, "Mobile Multi-dimension Tracking and Surveillance System", based on the unmanned model helicopter platform, will accomplish tracking and surveillance on mobile object. In order to make unmanned vehicle more useful, it is critical that autonomous, semi-autonomous, and cooperative navigation function be developed. For this, the paper concentrates on the follow aspects in navigation sub-system development:1. Proposed an improved real-time virtual differential GPS to improve positioning accuracy after analyzed some methods that can improve positioning accuracy;2. A solution is presented to maintain road-network's topological relationships from vector data of road-network in Maplnfo;3. An efficient method of computing the shortest path algorithm which is based on Dijkstra algorithm is presented;4. A method for fast 3D path planning and obstacle avoidance, based on the distance transform, is introduced.The results of above research not only can be applied to fields such as personal or vehicle navigation system, GIS, but also can provide the base of farther studying and developing "Mobile Multi-dimension Tracking and Surveillance System".