Phased array radar seekers have become an important direction for the development of seekers due to their advantages in detection and anti-jamming capabilities.To isolate the effects of platform disturbances on the beam pointing of the onboard seekers and achieve high-precision measurement and tracking of the seekers,this pa-per proposes a digital platform for strapdown decoupling.The missile attitude information is fed forward to the seeker's angular tracking system,allowing the seeker to control its beam to rotate in the direction opposite the mis-sile rotation using the phase shifter to its pointing before the missile rotation,thereby stabilizing the beam pointing in inertial space and achieving the purpose of decoupling the missile attitude and seeker beam pointing.The positio-ning loop and tracking loop of the proposed digital platform are modeled and simulated in MATLAB,verifying the effectiveness of the digital platform.The isolation performance of the proposed digital platform at typical disturbance frequencies meets matching engineering requirements.
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