Mathematical Model for Pipeline Control Applying in-Line Robotic Device

The pipeline robot will encounter complex conditions of turning, obstacles and pipe diameter changes when it works. Therefore, cornering performance, obstacle crossing performance, and diameter changing ability are important indicators of the pipeline robot performance. A multi-axis differential adaptive pipeline robot is designed. The multi-axis differential mechanism is used to realize the smooth turning of the robot. The pre-tightening and reducing mechanism is used to achieve the obstacle crossing of the robot and the ability to adapt to different pipe diameters. The overall structure of the pipeline robot, the transmission mechanism, and the pre-tightening and reducing mechanism are introduced. The kinematics model of the robot is studied when it crosses obstacles. Using the maximum height of the pipeline robot passing through obstacles as an indicator, an equation of the pipeline robot obstacle crossing is established. The ADAMS software is used to simulate the kinematics of the turning process of the pipeline robot. Through the simulation experiments, the following conclusions are obtained: (1) The larger the adhesion coefficient between the pipe wall and the wheel, the stronger the obstacle crossing ability of the pipeline robot. The larger the diameter of the wheel, the stronger the ability to overcome obstacles. (2) By tracking the changes in the angular velocity of the three driving wheels, it is shown that the pipeline robot can pass through the curve smoothly and has anti-motion interference performance.

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Research on Pipeline Robots with Obstacle Crossing and Turning Ability

Wei

Cheng

Wang

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

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Mathematical Model for Pipeline Control Applying in-Line Robotic Device

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Research on Pipeline Robots with Obstacle Crossing and Turning Ability

Research on Pipeline Robots with Obstacle Crossing and Turning Ability

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