Bearings only passive location for UAV in formation flight

With the increasing development of UAV technology, formation flight has also changed from single target task execution to multi-target cooperative execution. When is developing rapidly in direction clustering, there are too many external interference factors. Therefore, electromagnetic silence should be maintained for a long time whole flight, and number times when transmitting wave signals outside reduced as much possible. this paper uses sine cosine theorem adjust position optimal by using bearings only passive location method maintain flight. In paper, used locate optimize other UAVs that receive passively; By enumerating, corresponding linear equations listed triangle formed all UAVs; The each shall adjusted step according above conclusions, remaining receiving passively ensure uniform distribution nine on circumference with radius 100m.