The Pulsed Doppler Seeker Tracking System Modeling And Simulation Technology

Active homing guidance system mostly adopts the pulse Doppler system. Therefore, research has important significance for radar seeker simulation. The purpose of establishment of model library based on MATLAB put some often used cell , subsystem , signal disposal technique and signal generator in radar seeker system and simulation into module, forming radar special library, aiming at traditional low efficient simulation method that each system modeling singly. Thereby providing database for the radar seeker design, make the modeling and simulation of the radar seeker system start at the higher level, quicken simulation of the system research, bring great advantage for the research. Meanwhile, MATLAB is good at control, matrix operation and mixed program., by way of simulation flat, has great advantage. This paper accomplished task includes:(1) establish radar seeker antenna model library based on phase sum-difference angle-measuring method, including function drafted model, annular antenna array and practically measured data interpolated antenna array model. Moreover test these models and draw out planar and three-dimensional direction figure. Compare the results of them.(2) Model and simulate the servo system of radar seeker. mainly taking missile body quivering disturbance into account, model the prearranged loop andstabilization loop, and test them with typical signal.(3) Model the angle tracking system and correlated system. Angle tracking system includes antenna tracking model and measurement of angle turning rate of missile-target line of sight. Correlated system includes velocity linking model, velocity tracking model and distance tracking model.(4) Study the dynamic simulation of the angle tracking system and correlated system, providing flow chart of the simulation and analyzing the result of the simulation when the target trajectory is straight line(including counterpunching and trailing behind ).In the missile's dynamic simulation, seeker is always simplified as one rank inertia tache. Much of characteristic in the simulation was neglected. This paper modeling the angle tracking system of seeker, adding correlated system into missile simulation, will make the simulation information full-scale and the result believable.