Design and Simulation of a Flexible Three-Module Pipe Climber

Abstract

The paper introduces a novel design for an in-pipe climbing robot with a flexible body, along with the successful simulation of the proposed mechanism. The presented Three-Module pipe climber can traverse a complex network of pipes and bends at various angles. It has bidirectional motion capabilities and is orientation independent. It can also negotiate the ‘Singularity Region’ encountered while turning through the Tjunction. The pipe climber has three modules which are arranged symmetrically $120^{\mathrm{o}}$ apart from each other. These modules mount the tracks which provide the necessary traction for the robot to avoid slippage on the pipe’s surface. The modules, independently, have the ability to compress asymmetrically allowing the robot to bend in any direction. The taper in the front of the design and additional body flexibility due to passive spring compliance aid the motion at turns. The design of the robot is done on SOLIDWORKS and its motion is studied using MSC ADAMS. While simulating the proposed mechanism, differential speed was provided to the tracks for negotiating turns.