Correction of the spacecraft attitude error induced by scan mirror-gimbal motion

The image technology of the spacecraft offers useful information variously: weather, geography and military intelligence. Recently, demands of the image which have higher accuracy and degree of precision are rapidly increased. In this sense, scan mirror-gimbal system is implemented on the image observation devices to compensate the image error. The dynamics of the scan mirror-gimbal system and main body of the spacecraft are coupled each other; scan mirror-gimbal motion induces the attitude error to main body. Main body attitude error causes negative effect to on accuracy and degree of precision of the other image observation devices. In this paper, main body dynamics of the spacecraft which is coupled with the scan mirror-gimbal system is introduced and control logic for correcting main body attitude errors caused by scan mirror-gimbal motion is studied.