Strapdown Decoupling On Phased Array Seeker Of Missile

With the increasing development of military technology, the missile has become the mosteffective offensive and defensive weapon on the modern battlefield, and thus its operationalperformance requirements are also increasing, radar seeker as the most important part of themissile system, detecting and tracking is main task, so the overall level of missile depends onthe performance of seeker directly. From the sixties of last century, Strapdown guidancetechnology as the low-cost, high-performance advantages already received national attentionand has made rapid development; it also become one of the most important developmenttrends of tactical missile guidance system.Phased array seeker is the research hotspot in last few years，which can work in shorttime and track multi-objectives simultaneously and reject disturbance efficiently. However,the phased array seeker solid joint with the missile body completely, which compared with thetraditional missile with the action seeker, the line of sight angle rate can not be obtaineddirectly in inertial space. The disturbance of the missile body will interfere with the output ofPhased array seeker. So it is important to study the decoupling program of phased array seekerand the reconstruction of the inertial line of sight angle rate.Firstly, the basic concepts of a phased array seeker and the causes coupling areintroduced, summarized the purpose and method of decoupling, and then introduced twodecoupling methods, Fed back attitude of missile to the output of seeker or the loop of theangle tracking to decoupling. When input step and square wave signal, simulation shows thatthe two decoupled algorithm has faster response, better stability and good decoupling effect.Based on the phased array seeker system decoupling, a homing missile simulation modelof the overall system is built. Furthermore, through the further analysis, the proportionalnavigation method is derived and the stability of the proposed method is proved. Establishsystem model and simulation when the target for uniform linear motion and maneuver.The phased array seeker system is studied independently firstly, and then combining withthe other parts of missile, it insures the stability of the missile by adding the part ofdecoupling. Simulation studies demonstrate that the decoupling scheme has a strong real-time,the response speed and decoupling accuracy both reach the ideal value. It has reference valuefor practical engineering applications.