pinocchio
lipm_walking_controller
pinocchio | lipm_walking_controller | |
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9 | 2 | |
1,491 | 214 | |
5.1% | - | |
9.3 | 2.1 | |
7 days ago | 9 months ago | |
C++ | C++ | |
GNU General Public License v3.0 or later | BSD 2-clause "Simplified" License |
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pinocchio
- Good examples of C++ source code for math oriented software development?
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- I want to build a bipedal robot. Are there any open source libraries to handle walking and balancing?
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Help! After adding a chest (incl battery and two servos for the shoulders) my humanoid Kayra the same gait pattern doesn't work anymore. Here's a video contrasting with vs without chest. What are the top five improvements you'd suggest?
Open-loop walking + physics: (e.g. ZMP-based) one thing you can do (that does not imply adding an IMU to Kayra and going for feedback) is include some walking physics into your walking trajectory generation. To give you an idea, I've written a tutorial on doing that in Python a couple of years ago. The libraries in this tutorial are deprecated now, but I'm working on an equivalent stack at github.com/tasts-robots using more durable software like pinocchio. The libs are still WIP but if you are interested in exploring that dev path (i.e. making a ZMP-based trajectory generator for Kayra) I can support you and help adapt them (because I want that SW to be useful for a maximum number of people).
- What type of software is widely used for robotics in industry?
- I have a robot model in URDF (running in pybullet). Are there easy tools to get the forward/inverse kinematics, and especially use that to plug it into a LQR controller?
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What software can I use to play around with articulated robots?
Drake and Pinocchio both use the Python interface to Meshcat as an option for visualizing robots, and they can both do the forward kinematics and have visualizer components that place the visual meshes properly relative to the computed frames, but both of those are full-fledged and complex kinematics and dynamics libraries for contact-rich interaction (and more), so the API calls to get a model set up are doing a lot more than providing a visual model you can feed joint angles to.
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Rigid Body Dynamics Libraries
Pinocchio sounds like exactly what you need: https://github.com/stack-of-tasks/pinocchio
lipm_walking_controller
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Help! After adding a chest (incl battery and two servos for the shoulders) my humanoid Kayra the same gait pattern doesn't work anymore. Here's a video contrasting with vs without chest. What are the top five improvements you'd suggest?
On a related note, a ZMP-based trajectory optimizer also has a fitness function. Unfortunately it's not obvious at all in the tutorial I mentioned, there it only appears as wxt=1., wu=0.01; it's more obvious in the code and GUI of the lipm_walking_controller, where the cost function appears in the Walking → MPC tab. You can run this thing in a Docker if you want to check it out:
What are some alternatives?
meshcat - Remotely-controllable 3D viewer, built on top of three.js
kayra - an easy to modify, 3d printable open source humanoid robot evolved by the community
Robotics Library (RL) - The Robotics Library (RL) is a self-contained C++ library for rigid body kinematics and dynamics, motion planning, and control.
pink - Python inverse kinematics based on Pinocchio
idyntree - Multibody Dynamics Library designed for Free Floating Robots
paper_nava_2023_icra_fault-control-ironcub - Repository associated with the paper "Failure Detection and Fault Tolerant Control of a Jet-Powered Flying Humanoid Robot", published in IEEE ICRA 2023.
rbdl-orb - RBDL - Rigid Body Dynamics Library - ORB Version - The two main differences to the original rbdl is that this version has error handling and uses polymorphism for constraints
PCL - Point Cloud Library (PCL)
control-toolbox - The Control Toolbox - An Open-Source C++ Library for Robotics, Optimal and Model Predictive Control
MRPT - :zap: The Mobile Robot Programming Toolkit (MRPT)
meshcat-python - WebGL-based 3D visualizer for Python
upkie_description - URDF model for Upkie wheeled bipeds