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  Hopping Robotic Leg

This thesis presents the design and fabrication of a 2-DOF robotic leg using linear Lorentz-force actuators arranged in a parallel configuration. The decision to use linear actuators, a parallel architecture, and Lorentz-force motors was made because of distinct differences between these designs and the alternatives, notably, their lower weight, better resolution, and high bandwidth. We have shown that a robot of this construction can jump at least three times as high as the stroke length of its actuators, recording a maximum jump height of 48 mm using a stroke of 15 mm. This finding supports the feasibility of a larger robot based on this design.

For more information

  • Robert Hummel, Design and Fabrication of a Two Degree-of-Freedom Hopping Robot with Parallel Architecture Using Linear Lorentz-force Actuators, Bachelor's Thesis, Massachusetts Institute of Technology, 2009. (Full Text)
High-speed Video of Jump
Robot Jumping
Robot CAD Model
Robot at peak of jump
SolidWorks CAD Model