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Humanoid Robotics Laboratory

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Author: Dantam, Neil × End date: 2011 × search.filters.applied.f.resourcesubtype: Technical Report ×

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Ach: IPC for Real-Time Robot Control

2011 , Dantam, Neil , Stilman, Mike

We present a new Inter-Process Communication (IPC) mechanism and library. Ach is uniquely suited for coordinating perception, control drivers, and algorithms in real-time systems that sample data from physical processes. Ach eliminates the Head-of-Line Blocking problem for applications that always require access to the newest message. Ach is efficient, robust, and formally verified. It has been tested and demonstrated on a variety of physical robotic systems. Finally, the source code for Ach is available under an Open Source BSD-style license.

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Equations of Motion for Dynamically Stable Mobile Manipulators

2010-12-14 , Dantam, Neil , Kolhe, Pushkar , Stilman, Mike

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The Motion Grammar: Linguistic Perception, Planning, and Control

2010 , Dantam, Neil , Stilman, Mike

We present the Motion Grammar: a novel unified representation for task decomposition, perception, planning, and hybrid control that provides a computationally tractable way to control robots in uncertain environments with guarantees on completeness and correctness. The grammar represents a policy for the task which is parsed in real-time based on perceptual input. Branches of the syntax tree form the levels of a hierarchical decomposition, and the individual robot sensor readings are given by tokens. We implement this approach in the interactive game of Yamakuzushi on a physical robot resulting in a system that repeatably competes with a human opponent in sustained game-play for matches up to six minutes.

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