V.A. Kovrigin - Ph.D. (Eng.), Associate Professor, Department «Autonomous information and operating systems», Bauman Moscow State Technical University. E-mail: kovriginva@yandex.ru I.V. Muratov - Ph.D. (Eng.), Associate Professor, Department «Autonomous information and operating systems», Bauman Moscow State Technical University. E-mail: muratow2007@yandex.ru V.K. Khokhlov - Dr.Sc. (Eng.), Professor, Department «Autonomous information and operating systems», Bauman Moscow State Technical University. E-mail: valerykhokhlov@mail.ru

The problems of modeling of processes of functioning of frequency self-tuning scheme in the near zone of location are considered. At development of Doppler systems of near radar location with seeker the method of analysis of failure of seeker is commonly based on fixed value of velocity change regardless of the conditions of the meeting missile and target. Therefore, the research of system of frequency self-tuning scheme in the near zone of location at the moment of failure of seeker was carried out. Mathematical models of the functional units of the system frequency self-tuning (intermediate frequency amplifier, lowpass filter, controlled oscillator) are developed on the base of the analysis of structural features of the scheme frequency automatic self-tuning of seeker. Structural diagram of the mathematical model implemented in the software package Simulink of Matlab. The features of the behavior of the Doppler frequency signal from point target in the near zone of location are considered in the article. The spatial and temporal dependences of the Doppler frequency and the speed of its change are obtained. The dynamic characteristics of the system frequency automatic self-tuning and angles of vision of targets at the time of failure as a function of miss and relative speed are calculated. To establish of initial data for the development of the system of near radar location complexional with seeker the preliminary researches of the characteristics of the tracking loss are necessary. The mathematical model of the system frequency automatic self-tuning can be applied for studying of processes both for system of near location and seeker.

 

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