Title :
An asymptotically stable switched system visual controller for eye in hand robots
Author :
Gans, Nicholas R. ; Hutchinson, Seth A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
Visual servoing methods are commonly classified as image based or position based, depending on whether image features or the robot pose is used in the feedback loop of the control law. Choosing one method over the other gives stability in the chosen state but surrenders all control over the other, which can lead to system failure if feature points are lost or the robot moves to the end of its reachable space. We present a hybrid switched system visual servo method that utilizes both image based and position based control laws. Through a switching scheme we present, this method provides asymptotic stability in both the image and pose and prevent system failure.
Keywords :
asymptotic stability; closed loop systems; end effectors; image motion analysis; robot vision; servomechanisms; asymptotic stability; feedback loop; hand robots; hybrid switched system; image based method; image features; position based method; robot pose; visual servoing; Asymptotic stability; Cameras; Control systems; Error correction; Robots; Servomechanisms; Servosystems; Switched systems; Velocity control; Visual servoing;
Conference_Titel :
Intelligent Robots and Systems, 2003. (IROS 2003). Proceedings. 2003 IEEE/RSJ International Conference on
Print_ISBN :
0-7803-7860-1
DOI :
10.1109/IROS.2003.1250717