Motion Planning Diffusion: Learning and Planning of Robot Motions with Diffusion Models

Carvalho, J.; Le, A.T.; Baierl, M.; Koert, D.; Peters, J. (2023). Motion Planning Diffusion: Learning and Planning of Robot Motions with Diffusion Models, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS).

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This repository implements MPD - Motion Planning Diffusion -, a method for learning and planning robot motions with diffusion models, which was presented at IROS 2023.

NOTES

• Since the IROS submission we improve the code for better parallelization and improved the baselines. Hence, the results in the paper are slightly outated, but the qualitivative results are still valid.
• We changed the data generation to use RRT Connect followed by GPMP2, which we found to lead to smoother results.
• The training of the baseline (CVAE) and comparison with traditional planning methods will be added soon.

If you have any questions please let me know -- joao@robot-learning.de

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Installation

Pre-requisites:

• Ubuntu 20.04 (maybe works with other OS)
• miniconda

Clone this repository with

cd ~
git clone --recurse-submodules https://github.com/jacarvalho/mpd-public.git
cd mpd-public

Download IsaacGym Preview 4 and extract it under deps/isaacgym

mv ~/Downloads/IsaacGym_Preview_4_Package.tar.gz ~/mpd-public/deps/
cd ~/mpd-public/deps
tar -xvf IsaacGym_Preview_4_Package.tar.gz

Run the bash setup script to install everything.

cd ~/mpd-public
bash setup.sh

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Running the MPD inference

To try out the MPD inference, first download the data and the trained models.

conda activate mpd

gdown --id 1mmJAFg6M2I1OozZcyueKp_AP0HHkCq2k
tar -xvf data_trajectories.tar.gz
gdown --id 1I66PJ5QudCqIZ2Xy4P8e-iRBA8-e2zO1
tar -xvf data_trained_models.tar.gz

Run the inference script

cd scripts/inference
python inference.py

Comment out the model-id variable in scripts/inference/inference.py to try out different models

model_id: str = 'EnvDense2D-RobotPointMass'
model_id: str = 'EnvNarrowPassageDense2D-RobotPointMass'
model_id: str = 'EnvSimple2D-RobotPointMass'
model_id: str = 'EnvSpheres3D-RobotPanda'

Depending on the task (model-id) you might need to change the weights for collision and smoothness (we will provide an "hyperpameter search" soon.)

weight_grad_cost_collision: float = 3e-2
weight_grad_cost_smoothness: float = 1e-2

The results will be saved under data_trained_models/[model_id]/results_inference/.

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Generate data and train from scratch

We recommend running the follwowing in a SLURM cluster.

conda activate mpd

To regenerate the data:

cd scripts/generate_data
python launch_generate_trajectories.py

To train the model:

cd scripts/train_diffusion
python launch_train_01.py

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Citation

If you use our work or code base(s), please cite our article:

@inproceedings{carvalho2023mpd,
  title={Motion Planning Diffusion: Learning and Planning of Robot Motions with Diffusion Models},
  author={Carvalho, J. and  Le, A.T. and  Baierl, M. and  Koert, D. and  Peters, J.},
  booktitle={IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)},
  year={2023}
}

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Credits

Parts of this work and software were taken and/or inspired from:

• https://github.com/jannerm/diffuser