Study And Design Of Angle-tracking For Passive Radio Seeker

Anti-Radiation-Missile (ARM) is regarded as one of the destructive weapons fighting to the enemyequipment for electromagnetic detection, especially destroy radar and interferential equipment.Direct-fighting ARM played a important role in the recent local war(…., Iraq War etc),it has become theprimary weapons using in air attack、breaking channels、suppressing、destroying enemy radar system foraerial defence in modern war.Passive Radar Seeker (PRS) is the important part of ARM,which mainly work for catching andtracking the radiant point, its techno-performance will effect the capability of ARM.The main function of the angle track system is achieving target-searching、capturing and tracking,besides keeping the point of antenna beam in inertia space, in the case of the missile generatedisturbance(the fly speed、over loading、airflow disturbance、thrust engine of engine) by outside. Theangle track system playes a important role in radar seeker general design, it provides advantageoussupport to finding target、tracking target and measuring the exact place of target.To satisfy the demand of fighting, improve the ability of fighting and some performance of PRSangle track system, we consider to improve the environmental adaptability of PRS. Therefore, the studyon PRS angle track technique has become very significant.In the thesis, we firstly expatiate the general design and realization of PRS angle track system、servo stabilized system design、Line-of-sight angular rate filtering method etc. We put forward a plan forgyroscope stabilized platform controlling based on frame gyroscope、servo motor、gear reducer、classicalPID control system. Stabilized loop based on the principle of strapdown initial alignment of gyroachieve the stabilization and controlling of the load. Besides, angle track loop achieve the place controlmade the system quickly、exactly and stably.Secondly, we discuss the method to pick up the Line-of-sight angular rate and to filter in the angletrack system. And finish the math model establishment and the simulation of each part in angle tracksystem. According to the demand of theory analysis and control parameter choosing, we make up themath model of angle track system. Furthermore, we finish the simulation of the angle track system byusing Matlab/Simulink, and provide the result of most techno standard.Finally,we have debuged elementarily the performance of the angle track system,and made thetheory study and analysis of the Line-of-sight angular rate outputed from PRS and the signal of the angleplace occur regular periodic oscillation in tracking condition.By ameliorating the design, we haverestrained the limit cycles oscillations of the servo system effectively.