FYP REPTILE ROBOT

Date : Jan 2017 - Oct 2017

The project presented in this report aims to explore and mimic the movement of a snake in order to gain its advantages, both in theory and in practice. The purpose of this is to investigate how the motion of snakes can be used for robotic movement. The project developed at the Department of Electronic Engineering Mehran University of Enineering & Technology Jamshoro during the spring of 2017. Snake robots are ideally suited to highly confined environments because their small cross-sections and highly redundant kinematics allow them to enter and move through tight spaces with a high degree of dexterity. Despite these theoretical advantages, snake robots also pose a number of practical challenges that have limited their usefulness in the field. These challenges include the need to coordinate a large number of degrees of freedom, decreased system reliability due to the serially chained nature of the robot’s design, and the complex interaction of the robot’s shape with the world. This thesis makes progress towards addressing these issues with two main areas of contribution. In the first part, we provide tools for supportive autonomy in snake robots. To provide intuitive high-level autonomous behaviors, we extend our lab’s existing gait-based control framework to develop gait-based compliant control. To reliably and accurately sense the robot’s pose and shape we present new techniques for robust state estimation that leverage the redundancies in the distributed sensing capabilities of our group’s articulated snake robots. To demonstrate these contributions in a practical application, we use them to enable a snake robot to navigate a real-world underground pipe network. One of the most limiting characteristics of our snake robots (and robots in general) is the inability to precisely sense and control the torques and forces of their actuators