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Filtering by: Creator Bristol, Jonathan R. Remove constraint Creator: Bristol, Jonathan R. Academic Affiliation Mechanical, Industrial, and Manufacturing Engineering Remove constraint Academic Affiliation: Mechanical, Industrial, and Manufacturing Engineering

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  • ATRIAS 1.0 & 2.1 : enabling agile biped locomotion with a template-driven approach to robot design

    Creator:
    Grimes, Jesse A.
    Abstract:
    Practical bipedal robots need to be simultaneously efficient, robust, and versatile machines, but designing robots dynamically capable of these demands has been a significant bottleneck. We designed ATRIAS to be a highly dynamic biped capable of both walking and running untethered in real environments. To meet these goals, ATRIAS is...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Jonathan W. Hurst Practical bipedal robots need to be simultaneously e�cient, robust, and

  • From running birds to walking robots : optimization as a unifying framework for dynamic bipedal locomotion

    Creator:
    Hubicki, Christian M.
    Abstract:
    Bipedal locomotion is a complex phenomenon to understand and control, making it difficult for legged robots to achieve the speed, agility, efficiency, and robustness of their animal counterparts. This thesis argues for the use of numerical optimization to investigate and implement bipedal control as it applies to biology, dynamical models,...
    Resource Type:
    Dissertation
    Full Text:
    Dynamic Bipedal Locomotion Abstract approved: Jonathan W. Hurst Bipedal locomotion is a complex

  • Dynamics and control for spring-mass legged robots

    Creator:
    Vejdani Noghreiyan, Hamid Reza
    Abstract:
    The objective of this study is to propose control strategies for legged robots to walk and run naturally like humans and animals. To achieve this goal, we use the spring-mass model for the legged robots to be able to create the same dynamics in the leg as humans and animals....
    Resource Type:
    Dissertation
    Full Text:
    Control for Spring-Mass Legged Robots Abstract approved: Jonathan W. Hurst The objective of this

  • Force and impulse control for spring-mass running

    Creator:
    Koepl, Devin N.
    Abstract:
    We present a novel control strategy for running which is robust to disturbances, and makes excellent use of passive dynamics for energy economy. The motivation for our control strategy is based on observations of animals, which are able to economically walk and run over varying terrain and ground dynamics. It...
    Resource Type:
    Masters Thesis
    Full Text:
    Impulse Control for Spring-Mass Running Abstract approved: Jonathan W. Hurst We present a novel control

  • Passive dynamics and their influence on performance of physical interaction tasks

    Creator:
    Kemper, Kevin C., II
    Abstract:
    For robotic manipulation tasks in uncertain environments, research typically revolves around developing the best possible software control strategy. However, the passive dynamics of the mechanical system, including inertia, stiffness, damping and torque limits, often impose performance limitations that cannot be overcome with software control. Discussions about the passive dynamics are...
    Resource Type:
    Masters Thesis
    Full Text:
    Dynamics and Their Influence on Performance of Physical Interaction Tasks Abstract approved: Jonathan W

  • Control of spring-mass running robots

    Creator:
    Vejdani Noghreiyan, Hamid Reza
    Abstract:
    We seek the control strategies that are applicable on legged robots and control them to run in real world as robust and efficient as animals. To achieve this goal, we need to understand the principles of legged locomotion and the control policies that animals use during running. In this study...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Jonathan W. Hurst We seek the control strategies that are applicable on legged robots and

  • Optimal control of an underactuated bipedal robot

    Creator:
    Jones, Mikhail S.
    Abstract:
    Bipedal robots represent a unique class of control problems that combine many of the most difficult elements of nonlinear control. These robots are typically designed to be mobile and as such have limited energy and actuator authority making efficiency a prime concern. Unlike wheeled robots, legged robots must transition between...
    Resource Type:
    Masters Thesis
    Full Text:
    : Jonathan W. Hurst Bipedal robots represent a unique class of control problems that combine many of the

  • Template-based control of the bipedal robot ATRIAS

    Creator:
    Peekema, Andrew T.
    Abstract:
    This thesis details the derivation and application of template-based controls on a bipedal robot, as well as a description of the software framework that enabled experimentation. The software framework uses a combination of open-source tools including ROS, OROCOS, EtherCAT, and Xenomai to create a real-time environment for the controllers. The...
    Resource Type:
    Masters Thesis
    Full Text:
    : Jonathan W. Hurst This thesis details the derivation and application of template-based controls on a

  • Condensation of a zeotropic mixture, R-454C, and its individual components, R-1234yf and R-32, in microfin tubes

    Creator:
    Matty, Ethan P.
    Abstract:
    This work compares the condensation heat transfer and pressure drop for zeotropic refrigerant R-454C and its individual components, R-32 and R-1234yf, in horizontal microfin tubes. One microfin tube has a 4 mm outer diameter, 0.18 mm wall thickness, and a surface area ratio of 1.56. The second tube has a...
    Resource Type:
    Masters Thesis
    Full Text:
    a Zeotropic Mixture, R-454C, and its Individual Components, R-1234yf and R-32, in Microfin Tubes

  • Analysis of the Effects of Combustion Products on Forced Ignition and Turbulent Flame Propagation

    Creator:
    Bonebrake, Jonathan M.
    Abstract:
    Practical combustion devices frequently rely upon forced ignition of turbulent fuel/oxidizer mixtures that also contain the product species of combustion. Examples of this include engines that use exhaust gas recirculation (EGR), inter-turbine burners in aircraft engines, and other systems the utilize staged combustion. In this work, the effects of major...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Jonathan M