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arXiv 1401.6904cs.ROcs.SYeess.SYmath.OC
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无图像空间速度测量的机器人系统自适应视觉跟踪

Adaptive Visual Tracking for Robotic Systems Without Image-Space Velocity Measurement

Beijing Institute of Control Engineering(北京控制工程研究所)

Hanlei Wang

AI总结:

本文研究了无图像空间速度测量的机器人视觉跟踪问题,提出了一种新的图像空间观测器,通过未知动力学中的图像空间速度信息设计自适应控制器,解决了多不确定性分离问题,避免了过参数化。

摘要:

本文研究了机器人系统在无图像空间速度测量情况下的视觉跟踪问题,同时考虑了相机模型和机械臂动力学的不确定性。我们提出了一种新的图像空间观测器,利用未知动力学中包含的图像空间速度信息,设计了不使用图像空间速度信号的自适应控制器,其中深度速率无关的动力学参数和深度参数的适应由图像空间跟踪误差和观测误差驱动。所提观测器-自适应控制器的主要优势在于其简单性和在视觉伺服机器人系统中处理多个不确定性的分离,从而避免了现有工作的过参数化问题。通过李雅普诺夫分析,我们证明了图像空间跟踪误差渐近收敛到零。所提自适应控制方案的性能通过数值模拟进行了验证。

英文摘要:

In this paper, we investigate the visual tracking problem for robotic systems without image-space velocity measurement, simultaneously taking into account the uncertainties of the camera model and the manipulator kinematics and dynamics. We propose a new image-space observer that exploits the image-space velocity information contained in the unknown kinematics, upon which, we design an adaptive controller without using the image-space velocity signal where the adaptations of the depth-rate-independent kinematic parameter and depth parameter are driven by both the image-space tracking errors and observation errors. The major superiority of the proposed observer-based adaptive controller lies in its simplicity and the separation of the handling of multiple uncertainties in visually servoed robotic systems, thus avoiding the overparametrization problem of the existing work. Using Lyapunov analysis, we demonstrate that the image-space tracking errors converge to zero asymptotically. The performance of the proposed adaptive control scheme is illustrated by a numerical simulation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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