Robust seamless GEO scanning control strategy for airborne electro-optical/infrared reconnaissance systems

Airborne electro-optical/infrared reconnaissance systems could scan a large area by using an array detector and stitching the image sequence to produce a large area coverage image. During the scanning and imaging process, the reconnaissance system may experience various disturbances that can result in the failure of stitching ground area images. To investigate the suppression method of disturbance and achieve seamless area coverage, we first introduce the standard coordinate systems and conversion relationships used in Geo-scanning imaging. We describe the basic implementation of Geo-scanning ground imaging coverage and highlight the problems encountered in achieving seamless ground area coverage. To ensure seamless ground coverage, Geo-scanning uses compensating angular rate commands for cross-roll and pitch scanning gimbal. The process of Geo-scanning is then simulated in the simulation platform and the effectiveness of the designed perturbation suppression method is verified. The feasibility of suppressing multiple perturbations simultaneously is verified. A unified angular rate compensation command is proposed to suppress the effects of forward motion, heading static angular disturbance, and attitude tilt. This will avoid the need for different compensation command expressions for different perturbations and enable resistance to multiple perturbations simultaneously. The proposed method will make the angular rate command for platform scan imaging more robust and avoiding image stitching cracks, ensuring smooth image stitching from a motion control perspective and achieve seamless area coverage.