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Backstepping-Based Control of a Strapdown Boatboard Camera Stabilizer  

Setoodeh, Peyman (Department of Electrical Engineering, School of Engineering, Shiraz University)
Khayatian, Alireza (Department of Electrical Engineering, School of Engineering, Shiraz University)
Farjah, Ebrahim (Department of Electrical Engineering, School of Engineering, Shiraz University)
Publication Information
International Journal of Control, Automation, and Systems / v.5, no.1, 2007 , pp. 15-23 More about this Journal
Abstract
In surveillance, monitoring, and target tracking operations, high-resolution images should be obtained even if the target is in a far distance. Frequent movements of vehicles such as boats degrade the image quality of onboard camera systems. Therefore, stabilizer mechanisms are required to stabilize the line of sight of boatboard camera systems against boat movements. This paper addresses design and implementation of a strapdown boatboard camera stabilizer. A two degree of freedom(DOF)(pan/tilt) robot performs the stabilization task. The main problem is divided into two subproblems dealing with attitude estimation and attitude control. It is assumed that exact estimate of the boat movement is available from an attitude estimation system. Estimates obtained in this way are carefully transformed to robot coordinate frame to provide desired trajectories, which should be tracked by the robot to compensate for the boat movements. Such a practical robotic system includes actuators with fast dynamics(electrical dynamics) and has more degrees of freedom than control inputs. Backstepping method is employed to deal with this problem by extending the control effectiveness.
Keywords
Attitude control; attitude estimation; backstepping robot control; strapdown inertial navigation system(INS);
Citations & Related Records

Times Cited By Web Of Science : 2  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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