The analysis change form of phase portraits is conducted at their construction with different sometimes delays. Possibility of the use change form of phase portraits, built at different times delay is considered, for recognition BPLA. The method of recognition BPLA multirotor type is offered with the use form phase portraits, built at different times delay. A method allows to recognize BPLA multirotor type, and also to define character his motion.
unmanned aircraft, recognition of BPLA, pseudophase plane, phase portrait