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Abstract: An Analysis of Position and Velocity Sensor Systems for a 3-Degree-of-Freedom Planar Collaborative Robot

An Analysis of Position and Velocity Sensor Systems for a 3-Degree-of-Freedom Planar Collaborative Robot

Aaron L. Mills

Master's thesis, Department of Mechanical Engineering, Northwestern University, March, 1998.

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Abstract:

This thesis describes several methods for determining the position and velocity of a three degree-of-freedom planar collaborative robot (cobot). A cobot is a type of robotic device intended to assist a human operator through direct interaction. A planar cobot is designed to roll on a flat surface. Planar cobots require precise and continuous knowledge of their position and velocity to interact smoothly and intuitively with the operator. Based on these performance requirements, several position and velocity sensor systems have been implemented and compared. The sensor systems described in this thesis are either based on an odometry or a vision configuration and use one of several numerical methods to estimate the position and velocity. Experimental and theoretical analyses of these systems are used to evaluate the relationship between the sensor system and cobot performance.

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