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In this paper, we investigate the role of variable stiffness in the reduction of the energy cost for mechanical systems that perform desired tasks. The objective is to assess the use of Variable Stiffness Actuation (VSA) by determining an optimal stiffness profile and the associated energy cost of performing a desired task. For the analysis we consider mechanical systems of n-Degrees of Freedom (DoF),...
In this paper, we study the role of soft actuation in the reduction of the energy cost for mechanical systems that perform cyclic tasks. The objective is to determine the optimal stiffness value and spring pre-load such that a given cost functional is minimized. For the analysis, we consider both fully actuated and underactuated mechanical systems using elastic actuators which, depending on how and...
This paper addresses recent developments on Modular Snake Robots suited for applications on de-mining tasks. Inclusion of robotic platforms on the de-mining process will help tasks like the recognizance and perception of dangerous areas, minimizing human risk. As a mobile robot, the modular snake robot can move in a uneven terrain similar to a mined scenario. That is why, the main research efforts...
Concerning robotics, one topic of interest is locomotion and specifically non-conventional locomotion that can be oriented to design robots that could pass through different surfaces in an autonomous way, with the lower power consumption possible. An approach to it, is a modular snake robot in a closed chain configuration (as a rolling wheel) instead of a creeping locomotion. In this article we propose...
In this article we posit a general framework and outline for analyzing the holonomic motion of a closed robotic chain imitating a wheel. We give a general view of the state of the art concerning limbless locomotion; we explain briefly the robot terrain interaction modeling and expose the steps to follow for the analysis.
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