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The Regularities of the In-air Heat Tracking System Behaviour Under the Critical Intensities Conditions

Keywords:

A.A. Dontsov – Ph. D. (Eng.), Dr. Sc. Candidate, Associate Professor, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh). E-mail: addoncov1@mail.ru Yu.L. Koziratsky – Dr. Sc. (Eng.), Honored Scientist of RF, Professor, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh). E-mail: urleo@bk.ru V.V. Kalachev – Learner, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)


A discrete model is elaborated for tracking an air target by its heat image on the basis of calculation of the image’s energy center coordinates, a portion of which is insensitive due to critical emission intensities. In elaboration of the model a procedure is used for calculating the mask’s image that specifies the optical sensor array’s dead band which changes at every step of calculation when tracking a moving target. With the simulation technique, the regularities of the tracking system behaviour are identified which are based on forced error generation and sequential enhancement of the optical sensor array’s dead band. It was demonstrated that forced circulation of the tracking system provides its unstable operation since the total dead band area of the optical sensor array can be two-to-five times higher than the instantaneous dead band area. When the target tangential velocity is low, the minimum essential exposure time for the optical sensor array has been found to be 0,9…1,3 s. With a fivefold increase of the target tangential velocity, the minimum exposure time necessary for providing tracking loss decreases by 4 times.
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June 24, 2020
May 29, 2020

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