基于图像误差的机器人运动目标自适应跟踪

ROBOT ADAPTIVE TRACKING OF MOVING TARGET BY IMAGE ERROR

  • 摘要: 讨论了机械手运动目标跟踪问题,直接利用图像误差达到注视目的.利用手部摄像机于期望位置获取待跟踪物体图像,以此作为期望图像,而后可以对同类运动物体进行注视跟踪,使实时采样图像收敛于期望图像.该控制方案与通常基于图像特征的控制方法不同,其为直接图像反馈方法,控制律由图像差反馈和物体运动自适应补偿组成,可以完成“眼注视”这种具有局部收敛要求的运动目标跟踪,具有良好的准确性与鲁棒性.

     

    Abstract: This paper presents a direct image adaptive control scheme for visual tracking of moving target. It is different from feature based visual servo. The manipulating process is as follows: first of all, move the arm to the desired manipulating position and orientation with respect to the object of interest then sample the image of the object by eye-in-hand camera. In the manipulating process, the scheme, which compares the real time sampled-image with the desired one, forms the image error. Then the control action composed of image error feedback and adaptive motion compensation-steers the gripper to track the moving target in order that the image error is eliminated. If the manipulating-process does not satisfy very well the initial error condition, the control law can be used for to track the moving target with accurate and robust properties.

     

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