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A String-Based Representation and Crossover Operator for Evolutionary Design of Dynamical Mechanisms

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)1600-1607
Number of pages8
JournalIEEE Robotics and Automation Letters
Issue number3
Early online date31 Jan 2018
Publication statusPublished - Jul 2018


Robots would perform better when their mechanical structure is specifically designed for their designated task, for instance by adding spring mechanisms. However, designing such mechanisms, which match the dynamics of the robot with the task, is hard and time consuming. To assist designers, a platform that automatically designs dynamical mechanisms is needed. This letter introduces a novel string-based representation for mechanisms, including evolutionary operators, that allows an evolutionary algorithm to automatically design dynamical mechanisms for a designated task. The mechanism representation allows simultaneous optimization of topology and parameters. Simulation experiments investigate various algorithms to obtain best optimization performance. We show the efficacy of the representation, operators, and evolutionary algorithm by designing mechanisms that track straight lines and ellipses by virtue of both their kinematic and dynamic properties.
Index Terms—Mechanism design, dynamics, optimization, optimal control

ID: 67404726