CAJ | 학술논문

为实现凝视卫星动态跟踪清晰成像，建立了卫星对地实时跟踪成像的数学模型，推导了卫星凝视跟踪成像时本体坐标系相对轨道坐标系的姿态角和角速度的变化，设计了物像位置与速度矢量映射算法，搭建了焦平面像点与地面景物点位置与速度变化的一一对应关系，结合蒙特卡洛方法统计分析了动态跟踪成像过程中卫星的姿态变化及姿态动态跟踪精度对成像的影响。最后，利用CMOS相机和小卫星姿态控制系统全物理仿真平台对凝视成像进行了仿真分析。结果表明：卫星凝视成像过程中，像面存在卫星姿态变化及姿态动态跟踪精度引起的像在探测元上的驻留时间小于探测器的积分时间，分析及仿真得出，为满足驻留时间大于或等于积分时间的要求，仿真平台动态跟踪精度优于0.002(。)/s时，可实现500 km凝视卫星2 m分辨率动态跟踪清晰成像。
위실현응시위성동태근종청석성상，건립료위성대지실시근종성상적수학모형，추도료위성응시근종성상시본체좌표계상대궤도좌표계적자태각화각속도적변화，설계료물상위치여속도시량영사산법，탑건료초평면상점여지면경물점위치여속도변화적일일대응관계，결합몽특잡락방법통계분석료동태근종성상과정중위성적자태변화급자태동태근종정도대성상적영향。최후，이용CMOS상궤화소위성자태공제계통전물리방진평태대응시성상진행료방진분석。결과표명：위성응시성상과정중，상면존재위성자태변화급자태동태근종정도인기적상재탐측원상적주류시간소우탐측기적적분시간，분석급방진득출，위만족주류시간대우혹등우적분시간적요구，방진평태동태근종정도우우0.002(。)/s시，가실현500 km응시위성2 m분변솔동태근종청석성상。
In order to achieve a clear dynamic staring imaging, the imaging model of satellite real- time imaging to track the target was designed, body posture angular velocity relative orbital coordinate system were designed when satellite staring imaging, the coordinate transformation method was used to real- time compute the time of the line transfer process in the gazing, the method of Monte Carlo was used to statistical calculate the influence of imaging under the satellite’s attitude point precision and stability in the mode of staring- imaging. Finally, the CMOS prototype and the minitype three- axis air bearing table constructed for attitude control were used to simulate the digital domain CMOS staring imaging.The results show that in the satellite staring imaging process, the integration time in the image plane which caused by satellite attitude change and attitude dynamic tracking is greater than the accuracy of the detector, analysis and simulation results show, in order to meet shift of less than or equal to the detection element size requirements, simulation platform dynamic tracking accuracy better than 0.002 (.)/s, can achieve satellite getting 2 m clear resolution dynamic imaging in 500 km.