THE UNMANNED AMPHIBIAN AIRCRAFT’S TECHNOLOGIES OF COMPLEX NAVIGATION IN THE AVIATION WATER AREA

Abstract

The paper considers the development of technologies for integrated high-precision navigation
of unmanned amphibian aircraft (UAA) to ensure both positioning and navigation on the surface in
conditions of limited atmospheric visibility (low cloudiness, masking effect of hydrometeors, night
time, etc.) in the seadrome’s water area using hydroacoustic a remote control channel operating
through the use of a bottom network structure of original transmitter-receiver antenna assemblies
(TAA). Each individual TAA is proposed to be used as an "omnidirectional" sonar bottom beacon in
the upper hemisphere, consisting of electroacoustic transducers (ET), each of which operates in the
mode of the parametric transmitting array. The statically generated "partial" lobes of the resulting
DP of single TAA are uniformly quantized over the bodily sectors in the hemisphere; moreover, due
to the use of nonlinear acoustics effects, an individual "frequency coloration" of each of the bodily
sectors is possible. As a result, an individual distribution of “frequency-colored spots” of local ultrasonic
irradiation can be formed at the “water - air” interface of a given section of the aviation water
area, and, both continuous and discrete, the latter can be considered as separate points of the required
trajectory of the UAA, radio electronic equipment which tracks the "acoustically marked"
section of the required direction of the wiring located ahead of the course.