ObstacleAvoidance Algorithm

---

This package contains a dynamic obstacle avoidance algorithm for concave and convex obstacles as developped in [1] and [2]. The Code is still in alpha version.

Requirements: python

Description

The algorithms allows to avoid dynamic, star-shaped obstacles. It requires anlytical description of the environment. It allows to navigate within moving, expanding and static obstacles.

Setup

To setup got to your install/code directory, and type:

git clone --recurse-submodules https://github.com/epfl-lasa/dynamic_obstacle_avoidance.git

(Make sure submodules are there if various_tools library is not installed. To initialize submodules after cloning use git submodule update --init --recursive. To update all submodules git submodule update --recursive

Go to file directory:

cd dynamic_obstacle_avoidance

Custom Environment

Choose your favorite python-environment. I recommend to use virtual environment venv. Setup virtual environment (use whatever compatible environment manager that you have with Python >=3.9).

python3.10 -m venv .venv

with python -V >= 3.9

Activate your environment

source .venv/bin/activate

Setup Dependencies

Install all requirements:

pip install -r requirements.txt && pip install -e .

make sure you also install the submodules (mainly vartools)

Install the sub modules:

cd libraries/various_tools && pip install -r requirements.txt && pip install -e . && cd ../..

Installation Options

If you want to be able to test/develop additionally install

pip install -r requirements_dev.txt

For the use of the jupyter notebook additionally install (found in the examples/notebook folder)

pip install -r requirements_notebook.txt

Getting Started

The example folder contains a jupyter notebook & general example for static & dynamic simulation in multi-obstacle environment.

More information about the behavior of the algorithm can be found in the video below (click on the image to watch it):

For Developers

We use pytest in this, to test the code run

pytest

Code consistency is ensured by using black. Download and setup pre-commit hook for automated formatting

pip install pre-commit

3D Plotting

In order to get nice 3D plots, additionally install mayavi (http://docs.enthought.com/mayavi/mayavi/index.html) & PyQt5

pip install mayavi
pip install PyQt5

Debug

You forgot to add the submodules, add them with:

git submodule update --init --recursive

References

[1] Huber, Lukas, Aude Billard, and Jean-Jacques E. Slotine. "Avoidance of Convex and Concave Obstacles with Convergence ensured through Contraction." IEEE Robotics and Automation Letters (2019).

[2] L. Huber, J. -J. Slotine and A. Billard, "Fast Obstacle Avoidance Based on Real-Time Sensing," in IEEE Robotics and Automation Letters, doi: 10.1109/LRA.2022.3232271.

Contact: [Lukas Huber] (https://people.epfl.ch/lukas.huber?lang=en) (lukas.huber AT epfl dot ch)

Acknowledgments This work was supported by EU ERC grant SAHR.

(c) hubernikus