Model-Based Experimental Development of Passive Compliant Robot Legs from Fiberglass Composites

We report on the methodology of developing compliant, half-circular, and composite robot legs with designable stiffness. First, force-displacement experiments on flat cantilever composites made by one or multifiberglass cloths are executed. By mapping the cantilever mechanics to the virtual spring model, the equivalent elastic moduli of the composites can be derived. Next, by using the model that links the curved beam mechanics back to the virtual spring, the resultant stiffness of the composite in a half-circular shape can be estimated without going through intensive experimental tryouts. The overall methodology has been experimentally validated, and the fabricated composites were used on a hexapod robot to perform walking and leaping behaviors.

[1]  Pei-Chun Lin,et al.  Bio-inspired step-climbing in a hexapod robot , 2012, Bioinspiration & biomimetics.

[2]  Shusheng Bi,et al.  A survey of bio-inspired compliant legged robot designs , 2012, Bioinspiration & biomimetics.

[3]  Jonathan E. Clark,et al.  Fast and Robust: Hexapedal Robots via Shape Deposition Manufacturing , 2002 .

[4]  Pei-Chun Lin,et al.  A simple running model with rolling contact and its role as a template for dynamic locomotion on a hexapod robot , 2014, Bioinspiration & biomimetics.

[5]  R J Full,et al.  Templates and anchors: neuromechanical hypotheses of legged locomotion on land. , 1999, The Journal of experimental biology.

[6]  Daniel E. Koditschek,et al.  RHex: A Simple and Highly Mobile Hexapod Robot , 2001, Int. J. Robotics Res..

[7]  Ioannis Z. Emiris,et al.  Design of a simple and modular 2-DOF ankle physiotherapy device relying on a hybrid serial-parallel robotic architecture , 2011 .

[8]  Pei-Chun Lin,et al.  Model-Based Development of Leaping in a Hexapod Robot , 2015, IEEE Transactions on Robotics.

[9]  Daniel E. Koditschek,et al.  Model-Based Dynamic Self-Righting Maneuvers for a Hexapedal Robot , 2004, Int. J. Robotics Res..

[10]  Maarouf Saad,et al.  Development and control of a robotic exoskeleton for shoulder, elbow and forearm movement assistance , 2012 .

[11]  Christian Cipriani,et al.  Bioinspired Fingertip for Anthropomorphic Robotic Hands , 2014 .

[12]  Inna Sharf,et al.  Bounding with Active Wheels and Liftoff Angle Velocity Adjustment , 2010, Int. J. Robotics Res..

[13]  Martin Buehler,et al.  Reliable stair climbing in the simple hexapod 'RHex' , 2002, Proceedings 2002 IEEE International Conference on Robotics and Automation (Cat. No.02CH37292).

[14]  T. McMahon,et al.  Scaling Stride Frequency and Gait to Animal Size: Mice to Horses , 1974, Science.

[15]  Daniel E. Koditschek,et al.  Proprioceptive sensing for a legged robot , 2005 .

[16]  R. M. Alexander,et al.  Elastic mechanisms in animal movement , 1988 .

[17]  Martin Buehler,et al.  Modeling and Experiments of Untethered Quadrupedal Running with a Bounding Gait: The Scout II Robot , 2005, Int. J. Robotics Res..

[18]  Jonathan E. Clark,et al.  Design and Performance Evaluation of a Bio-Inspired and Single-Motor-Driven Hexapod Robot With Dynamical Gaits , 2015 .

[19]  R. Blickhan.  The spring-mass model for running and hopping. , 1989, Journal of biomechanics.

[20]  Jonathan E. Clark,et al.  iSprawl: Design and Tuning for High-speed Autonomous Open-loop Running , 2006, Int. J. Robotics Res..

[21]  Martin Buehler,et al.  Preliminary Bounding Experiments in a Dynamic Hexapod , 2002, ISER.

[22]  Martin Buehler,et al.  Stair descent in the simple hexapod 'RHex' , 2003, 2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422).

[23]  Michele Folgheraiter,et al.  Bio-inspired control of an arm exoskeleton joint with active-compliant actuation system , 2009 .

[24]  John Guckenheimer,et al.  The Dynamics of Legged Locomotion: Models, Analyses, and Challenges , 2006, SIAM Rev..

[25]  Daniel E. Koditschek,et al.  Toward a vocabulary of legged leaping , 2013, 2013 IEEE International Conference on Robotics and Automation.