RoboNaldo

Accurate, stable, and powerful humanoid soccer shooting via motion-guided curriculum reinforcement learning.

🌎English | 🇨🇳中文

RoboNaldo trains Unitree G1 soccer-shooting policies in Isaac Lab.

This repository contains the simulation training code. For real-world hardware deployment, export the trained policy to ONNX and use it with Deploy Repo.

Repository Overview

• source/whole_body_tracking/: Isaac Lab extension, G1 robot config, tracking task, rewards, observations, commands, and PPO config.
• source/whole_body_tracking/whole_body_tracking/tasks/tracking/yaml/: public right-foot task presets.
• scripts/rsl_rl/: direct train, play, and evaluation entrypoints.
• docs/: detailed setup, task-parameter, and reward references.

News

• 2026-06 Training and deployment code release.

Getting Started

1. Install Isaac Lab

Install Isaac Sim and Isaac Lab first. This codebase follows the Isaac Lab extension layout and is intended for the Isaac Lab Python environment.

Recommended baseline:

Dependency	Version
Isaac Sim	4.5.0
Isaac Lab	2.1.0
Python	3.10

2. Install BeyondMimic

Install both the upstream BeyondMimic repository and the RoboNaldo extension in the same Isaac Lab Python environment:

git clone https://github.com/HybridRobotics/whole_body_tracking.git
cd whole_body_tracking
python -m pip install -e source/whole_body_tracking
cd ..
python -m pip install -e source/whole_body_tracking

3. Download Robot Assets

The Unitree G1 description is not committed to this repository. Download it before creating the environment from the same asset source used by BeyondMimic:

mkdir -p source/whole_body_tracking/whole_body_tracking/assets
curl -L -o unitree_description.tar.gz https://storage.googleapis.com/qiayuanl_robot_descriptions/unitree_description.tar.gz
tar -xzf unitree_description.tar.gz -C source/whole_body_tracking/whole_body_tracking/assets/
rm unitree_description.tar.gz
test -f source/whole_body_tracking/whole_body_tracking/assets/unitree_description/urdf/g1/main.urdf

The code resolves this path through whole_body_tracking/assets.py, where ASSET_DIR points to source/whole_body_tracking/whole_body_tracking/assets. Do not add an assets/__init__.py; unlike the upstream BeyondMimic setup, this repository already provides the Python module that owns ASSET_DIR.

The downloaded source/.../assets/ directory is ignored by .gitignore and should not be committed. The soccer ball is created with Isaac Lab native SphereCfg, so no separate ball mesh is required.

4. Prepare Motions and Checkpoints

Training requires one retargeted kick motion in RoboNaldo NPZ format. This repository includes the open-source right-foot kick reference CSV retargeted by GVHMR+GMR:

motions/right_kick_reference.csv

Of course you can replace it with yours.

Convert the included reference CSV into NPZ:

python scripts/csv_to_npz.py \
  --input_file motions/right_kick_reference.csv \
  --input_fps 50 \
  --output_name right_kick \
  --headless

Optional: upload the converted NPZ to a W&B registry:

python scripts/upload_npz.py \
  --artifact_path motions/right_kick.npz \
  --entity <entity> \
  --name right_kick

Training

RoboNaldo uses a staged curriculum. Continue each stage from the previous stage checkpoint.

Stage	Purpose	Right-foot preset
Stage 1a	Plane motion-tracking prior, no task reward	right_kick/tracking_params.yaml
Stage 1b, optional	Mixed-terrain tracking robustness fine-tune	right_kick/tracking_mixed_params.yaml
Stage 2a	Small-range static-ball adaptation	right_kick/task_params_1.yaml
Stage 2b	Wider stationary-ball shooting	right_kick/task_params_2.yaml
Stage 3	Dynamic incoming-ball shooting with jump trigger/adaptive sampling	right_kick/task_params_3.yaml

For training, use scripts/rsl_rl/train.py directly:

python scripts/rsl_rl/train.py \
  --task Tracking-Body-Frame-Flat-G1-v0 \
  --motion_file motions/right_kick.npz \
  --yaml right_kick/tracking_params.yaml \
  --headless \
  --logger wandb \
  --log_project_name kick \
  --run_name right_kick_tracking

For different stages, change the --yaml argument value to switch among different stage presets.

Resume training:

python scripts/rsl_rl/train.py \
  --task Tracking-Body-Frame-Flat-G1-v0 \
  --motion_file motions/right_kick.npz \
  --yaml <yaml_file> \
  --resume True \
  --load_run <plane_tracking_run_folder> \
  --checkpoint model_<iter>.pt \
  --headless

It is recommended to use a small policy noise std for Stage 2 and Stage 3 resume runs, so the task policy does not destroy the learned kick prior with excessive exploration.

This release ships right-foot presets and the right-foot reference motion. A left-foot curriculum should use mirrored motion data and change main_foot_name to left_ankle_roll_link.

Use Tracking-Body-Frame-Flat-G1-v0 registry for the paper-style body-frame observation setup and Tracking-Flat-G1-v0 for external-mocap-style global observation setup.

Play and Evaluation

Use scripts/rsl_rl/play.py for playback. Known Stage-2 hot-test run:

python scripts/rsl_rl/play.py \
  --task Tracking-Body-Frame-Flat-G1-v0 \
  --wandb_path <your_checkpoint_path> \
  --yaml right_kick/task_params_2.yaml \
  --motion_file motions/right_kick.npz \
  --num_envs 1 \
  --headless

Use scripts/rsl_rl/eval.py for evaluation:

python scripts/rsl_rl/eval.py \
  --task Tracking-Body-Frame-Flat-G1-v0 \
  --wandb_path <your_checkpoint_path> \
  --yaml <your_yaml_file> \
  --motion_file motions/right_kick.npz \
  --num_envs 6000 \
  --headless

eval.py writes per-episode shot metrics and aggregate accuracy/speed summaries under logs/rsl_rl/eval/.

Deployment (ONNX Export)

Real-robot deployment expects an ONNX policy from this repo. The exporter writes policy-obs.onnx with embedded metadata (joint names, PD gains, default poses, observation/action layout, and motion anchor settings) for RoboNaldo_Deploy.

When	Output
W&B training (--logger wandb)	<run_folder>/<run_name>.onnx next to each saved model_*.pt
play.py playback	<checkpoint_folder>/exported/policy-obs.onnx

Run play.py once on the checkpoint you plan to deploy (same --task, --yaml, and --motion_file as training) to generate the ONNX artifact.

Documentation

• Quickstart
• 中文 README
• Task Parameters
• Rewards

Citation

If RoboNaldo helps your research, please consider citing:

@article{robonaldo2026,
  title={RoboNaldo: Accurate, stable, and powerful humanoid soccer shooting via motion-guided curriculum reinforcement learning},
  author={OpenDriveLab},
  journal={arXiv preprint arXiv:2606.11092},
  year={2026},
  url={https://arxiv.org/abs/2606.11092}
}

Acknowledgement

This repository builds on Isaac Lab (IsaacLab), BeyondMimic, and RSL-RL.