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Devin Carroll

Possible papers associated with this exact author name in Arrow. This page groups case-insensitive exact name matches and is not a full identity disambiguation profile.

3 papers

1 author row

IROS Conference 2021 Conference Paper

Slip Modeling and Simulation of Spiral Zipper Friction-Driven Prismatic Actuator

Seohyeon Lee
Sahoon Ahn
Devin Carroll
Mark Yim
TaeWon Seo

In this study, based on an analysis of experimental results, we propose a method for slip modeling of Spiral Zipper. The Spiral Zipper is a prismatic actuator that extracts a length-changeable cylindrical tube from a flexible ABS band. The band tube is driven by a friction wheel; the slip results due to the lack of synchronization between the motion of the band and that of the friction wheel. Through experiments, we verify that the flexibility of the band causes an impact force between the band and the friction wheel. Additionally, we verify that the tube extraction process causes resistance, which contributes to the increase in the relative angular velocity. Considering the factors mentioned above, we develop a slip model by employing different numbers of contact patches that express the flexibility of the band. Subsequently, we validate the model’s performance through simulations. In addition, we propose a coefficients standardization method for obtaining similar results with different number of contact patches We expect that this study will be a basis for design optimization and control system development of the Spiral Zipper.

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IROS Conference 2020 Conference Paper

Robots Made From Ice: An Analysis of Manufacturing Techniques

Devin Carroll
Mark Yim

Modular robotic systems with self-repair or self-replication capabilities have been presented as a robust, low cost solution to extraterrestrial or Arctic exploration. This paper explores using ice as the sole structure element to build robots. The ice allows for increased flexibility in the system design, enabling the robotic structure to be designed and built post deployment, after tasks and terrain obstacles have been better identified and analyzed. However, ice presents many difficulties in manufacturing. The authors explore a structure driven approach to examine compatible manufacturing processes with an emphasis on conserving process energies. The energy analysis shows the optimal manufacturing technique depends on the volume of the final part relative to the volume of material that must be removed. Based on experiments three general design principles are presented. A mobile robotic platform made from ice is presented as a proof of concept and first demonstration.

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IROS Conference 2017 Conference Paper

Variable topology truss: Design and analysis

Alexander Spinos
Devin Carroll
Terry Kientz
Mark Yim

This paper introduces a new class of self-reconfigurable robot: the variable topology truss (VTT). Related to an existing class of robots, the variable geometry truss (VGT), variable topology trusses have the additional capability to change the topology of the truss through self-reconfiguration. The hardware necessary to achieve this is introduced, and the constraints and capabilities of this new type of robot are analyzed by introducing the concept of a topology neighbor graph. Lastly, the minimal reconfigurable VTTs, which require 18 members, are identified and their achievable topologies are enumerated.

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