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28 September 2011 Robust scanning scheme over large area for airborne EO/IR camera
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Most of airborne cameras usually have two actuation axes(roll and pitch) to stabilize and point LOS(Line Of Sight) to a desirable direction. This two-axis structure makes LOS become vulnerable to angular rate disturbance around yaw(heading) axis of aircraft and allows camera to obtain images of only strip vicinity of target instead of rectangular coverage around the target even in moderate pitch lead/lag angle direction. These shortcomings, however, can be supplemented through the implementation of proper LOS scanning scheme suggested in this paper. Airborne EO/IR camera(AEI) is designed to obtain images of large area. Generation of pitch reference angular rate command considering predetermined trace of LOS projected on target(earth surface) and rotation of LOS from LL(Local Level) to gimbal coordinates can make sure LOS to scan properly. Simulation results show that the new scanning scheme ensures robust scanning even under aircraft heading disturbances and lead/lag pitch angle direction. This paper describes the new scanning scheme along with overall but brief introduction to the system formation of AEI, as well as simulation which enables us to verify and assess the effectiveness of the new scanning scheme.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yongeun Yoon, Gunhwan Yu, Changgyun Noh, and Daebuem Song "Robust scanning scheme over large area for airborne EO/IR camera", Proc. SPIE 8185, Electro-Optical and Infrared Systems: Technology and Applications VIII, 81850X (28 September 2011);

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