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    Realizing Torque Controllers for Underactuated Bipedal Walking Using the Ideal Model Resolved Motion Method

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    COUSINEAU-THESIS-2014.pdf (10.95Mb)
    Date
    2014-12-16
    Author
    Cousineau, Eric Andrew
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    Abstract
    This thesis presents an application of hybrid zero dynamics to realize underactuated bipedal walking on DURUS, a testbed designed and built by SRI International. The main contribution of this work is the ideal model resolved motion method (IMRMM), which is a simple method to convert ideal torque controllers to PD controllers to implement on hardware. Walking was first achieved using the proven method of the hybrid zero dynamics (HZD) reconstruction, followed by the Input-Output Feedback Linearization (IO) and Rapidly Exponentially Stabilizing Control Lyapunov Function Quadratic Programs (CLF-QPs) torque controllers implemented via IMRMM. The simulation and experimental results are presented and compared, and the best resulting specific cost of electrical transport on hardware was computed as 0.63 for the CLF-QP IM-RMM controller, and the record for walking was achieved on a separate occasion with the same CLF-QP IM-RMM controller, which yielded walking for 2 hours and 53 minutes, covering 7 km.
    URI
    https://hdl.handle.net/1969.1/154096
    Subject
    Underactuated
    Bipedal
    Walking
    Locomotion
    Robotics
    Humanoid
    Ideal Model
    Resolved Motion Method
    Hybrid Zero Dynamics
    Hybrid Systems
    Control
    Nonlinear Control
    Autonomous Walking
    Human-Inspired Framework
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    • Electronic Theses, Dissertations, and Records of Study (2002– )
    Citation
    Cousineau, Eric Andrew (2014). Realizing Torque Controllers for Underactuated Bipedal Walking Using the Ideal Model Resolved Motion Method. Master's thesis, Texas A & M University. Available electronically from https : / /hdl .handle .net /1969 .1 /154096.

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