Yazar "Kucuk, H" seçeneğine göre listele

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    Desensitization of camera-aided manipulation to target specification errors
    (MIT PRESS, 2004) Kucuk, H; Parker, GG; Baumgartner, ET; Klymyshyn, NA
    Applications of vision-based remotely operated robotic systems range from planetary exploration to hazardous waste remediation. For space applications, where communication time lags are large, the target selection and robot positioning tasks may be performed sequentially, differing from conventional telerobotic maneuvers. For these point-and-move systems, the desired target must be defined in the image plane of the cameras either by an operator or through image processing software. Ambiguity of the target specification will naturally lead to end-effector positioning errors. In this paper, the target specification error covariance is shown to transform linearly to the end-effector positioning error. In addition, a methodology for optimal estimation of camera-view parameters of a vision-based robotic system based on target specification errors is presented. The proposed strategy is based on minimizing the end-effector error covariance matrix. Experimental results are presented demonstrating an increase in end-effector positioning, compared to traditional view parameter estimation by up to 32%.
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    Robot positioning of flexible-link manipulator using vision
    (CAMBRIDGE UNIV PRESS, 2004) Kucuk, H; Parker, G; Baumgartner, ET
    Vision-aided flexible link robot positoning using the Camera Space Manipulation (CSM) method is developed. The primary motivation for this work is to use an autonomous vision-aided robotic system to pick-up and accurately move a flexible object that it encounters. The work consists of analytical and experimental investigation of the performance of CSM for a kinematic model of the PUMA manipulator with a flexible structure at the wrist which accounts for the gravitation. Trade-offs between camera view parameters and axial deflection model parameters were investigated. View parameter reestimation and maneuvering resulted a very accurate placement of the end-effector at the target.
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    The effect of modeling cartilage on predicted ligament and contact forces at the knee
    (PERGAMON-ELSEVIER SCIENCE LTD, 2006) Kucuk, H
    This paper describes a two-dimensional dynamic model of the human knee joint by employing cartilage model. The model outputs of rigid and deformable models are compared. The predicted tibio-femoral contact and ligament forces remain consistent whether or not a model of cartilage was included in the calculations. For both rigid and deformable contact models, the maximum contact force decreases as the amplitude of external force is increased. The effect of cartilage on ligaments' responses is insignificant except for the behavior of the anterior portion of the anterior cruciate ligament at large flexion angles. (c) 2005 Elsevier Ltd. All rights reserved.