User:Bussakendle/Hybrid navigation

Hybride navigation means the use of more than one navigation system smultaneously for location data determination.needed for navigation. By bundling of the systems parts location data, the quality e.g. the systems exactness will be augmented. Especially for autonomous driving the exact and continous knowledge of the navigating object is indispensible and absolutely essential.

Function
Hybride navigation uses different navigation systems synchroneously. GPS, as beeing a wireless transmission system needs free field conditions. If this condition isn't given, the system can't work. In that situation a different information source will be needed for navigation.

Problems
The system has to decide, which location data are to be used. A solution is a triple configuration for data collecting systems. Systems using satellites can be endangered by technical failure, switching-off or reduction of data precision by the systems holder. They are also prone to disturbers (intentional or unitentional). GPS

GPS and inertal sensors
Combining GPS location data and Inertial navigation data. The inertal sensors win the location data by summing up the movement vectors from start on.

GPS and incremental sensors
The navigation system finds the actual position by taking GPS signal and Fleet Management System  provided vehicle speed data.

Differential GPS
Differential GPS uses additional to the GPS transmitter a terrestric reference transmitter. As both transmitters require a free field transmitter receiver connection, thus a further location data source will be required. GPS is also sssensible to EMP, be it  nuclear or  non-nuclear.

Résumé
The use of Hybrid Navigation is needed to augment the precision of location data and for reduction of fault.

Weblinks

 * The Royal Institute of Navigation
 * Global Positioning System History
 * GPS world GNSS news

Literature

 * Yilin Zhao: Vehicle Location and Navigation Systems, Artech House, Boston, 1997, ISBN 9780890068618
 * Harvey J. Miller, Shih-Lung Shaw: Geographic Information Systems for Transportation: Principles and Applications, Oxford Press, N.Y. 2001, ISBN 0-19-512394-8
 * T. Strang: Lokalisierungsverfahren (LR, Deutsches Zentrum für Luft- und Raumfahrt e.V. in der Helmholtz-Gemeinschaft), Aachen 2008, ISBN 978-3-8322-7492-4
 * Werner Mansfeld: Satellitenortung und Navigation : Grundlagen, Wirkungsweise und Anwendung globaler Satellitennavigationssysteme , Vieweg + Teubner ,Wiesbaden 2010, ISBN 9783834806116