Abstract
In recent years, with the rapid development of Unmanned Aerial Vehicle (UAV) technology, the passive positioning technology of UAV has been further developed in military and civil fields. Especially in the field of maritime target search, the passive positioning system of multiple UAV has attracted more and more attention from coastal countries due to its features of low economic cost, long detection distance, fast response speed and high positioning accuracy. Taking four UAVs to perform maritime target search as an example, the paper establishes a passive positioning model based on Time Difference of Arrival (TDOA), deduces the Geometric Dilution of Precision (GDOP) formula of positioning accuracy, analyzes the positioning accuracy of multi-UAVs under different formation conditions, and provides a technical reference for improving the efficiency of maritime target search of multi-UAV passive positioning system.
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