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Dynamic Analysis and Distributed Control of the Tetrobot Modular Reconfigurable Robotic System

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Abstract

Reconfigurable robotic systems can be adapted to different tasks or environments by reorganizing their mechanical configurations. Such systems have many redundant degrees of freedom in order to meet the combined demands of strength, rigidity, workspace kinematics, reconfigurability, and fault tolerance. In order to implement these new generations of robotic system, new approaches must be considered for design, analysis, and control. This paper presents an efficient distributed computational scheme which computes the kinematics, dynamics, redundancy resolution, and control inputs for real-time application to the control of the Tetrobot modular reconfigurable robots. The entire system is decomposed into subsystems based on a modular approach and Newton's equations of motion are derived and implemented using a recursive propagation algorithm. Two different dynamic resolution of redundancy schemes, the centralized Jacobian method and the distributed virtual force method, are proposed to optimize the actuating forces. Finally, distributed dynamic control algorithms provide an efficient modular implementation of the control architecture for a large family of configurations.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Aeronautical Engineering, and Mechanics, Rensselaer Polytechnic Institute, Troy, New York, 12180, USA

    Woo Ho Lee & Arthur C. Sanderson

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  1. Woo Ho Lee
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  2. Arthur C. Sanderson
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Lee, W.H., Sanderson, A.C. Dynamic Analysis and Distributed Control of the Tetrobot Modular Reconfigurable Robotic System. Autonomous Robots 10, 67–82 (2001). https://doi.org/10.1023/A:1026548520006

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