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BUILDING OF HYDROACOUSTIC NAVIGATION SYSTEM WITH ULTRASHORT BASE FOR CONVERSION OF THE UNDERWATER APPARATUS TO THE DOCKING MODULE
DOI: 10.36724/2072-8735-2020-14-7-20-28
Boris I. Filippov, Novosibirsk State Technical University, Novosibirsk, Russia,
filippov-boris@rambler.ru
Abstract
The purpose of the work is the development and research of the equipment of the high-frequency hydroacoustic system of transformation of short-range providing docking of autonomous submarine apparatus with a carrier for a hydroacoustic navigational system (HNS) with an ultrashort base. A decision supposes creation of high-precision HNS of estimate of location of the submarine apparatus (SA) and creation of the hydroacoustic system of communication between SA and the docking module (DM) with quite intensive exchange of information and small probability of mistakes. The specified task can be decided by two ways: 1. development of independent systems of navigation and communication of data; 2. development of the combined information and navigation system, where information signals are at the same time navigation. The advantage of the first way is the possibility to select the type of signals, the most suitable for functioning of each of systems. A main disadvantage is an increase of volume of equipment and need of introduction of system of synchronization allowing carry out data exchange between SA and DM with use of the principle of temporary division of signals. The second way is preferable both on equipment volume, and on tactical application. The win in the tactical application is that frequency of transmission of information messages is not connected to the transmission of separate signals of HNS and therefore can be made maximum. At the same time the interval of trajectory counts can be reduced, it is required for the increase of exactness of estimation of location of SA. Further the possibility of creation of the combined HNS is considered. It is possible to draw the following system-wide conclusions by results of preliminary estimates: 1) signals of transfer of data can be used as a navigation signal in HNS with an ultrashort base, it will allow to create the combined information navigation system of transformation; 2) level of a navigation signal considerably is exceeded level of noise environment in a transformation zone. Superficial and ground reflections will be acted as hindrances. It is desirable to choose depth of immersion of DM and SA much bigger, than the minimum distance of transformation for minimization of these hindrances; 3) in HNS with ultrashort base it is possible to use two ways of receiving estimates of a bearing and a corner of the place. In the first way estimate of navigation characteristics is made on the basis of the analysis CCF of a navigation signal at the exit of elements of the HNS antenna at an unknown form of a navigation signal. In the second way the used estimates are based on application of a priori known navigation signal on his function of uncertainty. A final choice of a way can be made during realization of natural tests.
Keywords: combined hydroacoustic navigation system, underwater apparatus (SA), the docking module (DM), navigation characteristics.
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Information about author:
Boris I. Filippov, Novosibirsk State Technical University, Ph. D. in Technical Scinces, Department of Information Protection, Novosibirsk, Russia