Affordable Access

A comparison between the Denavit–Hartenberg and the screw-based methods used in kinematic modeling of robot manipulators

Authors
Journal
Robotics and Computer-Integrated Manufacturing
0736-5845
Publisher
Elsevier
Publication Date
Volume
27
Issue
4
Identifiers
DOI: 10.1016/j.rcim.2010.12.009
Keywords
  • Kinematic Modeling
  • Screw-Based Kinematic Modeling
  • Denavit–Hartenberg Convention
  • Robotic Manipulators
Disciplines
  • Design
  • Engineering

Abstract

Abstract This paper aims to integrate didactically some engineering concepts to understand and teach the screw-based methods applied to the kinematic modeling of robot manipulators, including a comparative analysis between these and the Denavit–Hartenberg-based methods. In robot analysis, kinematics is a fundamental concept to understand, since most robotic mechanisms are essentially designed for motion. The kinematic modeling of a robot manipulator describes the relationship between the links and joints that compose its kinematic chain. To do so, the most popular methods use the Denavit–Hartenberg convention or its variations, presented by several author and robot publications. This uses a minimal parameter representation of the kinematic chain, but has some limitations. The successive screw displacements method is an alternative representation to this classic approach. Although it uses a non-minimal parameter representation, this screw-based method has some advantages over Denavit–Hartenberg. Both methods are here presented and compared, concerning direct/inverse kinematics of manipulators. The differential kinematics is also discussed. Examples of kinematic modeling using both methods are presented in order to ease their comparison.

There are no comments yet on this publication. Be the first to share your thoughts.