207 lines
5.9 KiB
Markdown
207 lines
5.9 KiB
Markdown
# go2_rl_robotlab
|
|
|
|
## Overview
|
|
|
|
|
|
Trains the Unitree Go2 robot using MoE-CTS in IsaacLab and deploys the trained policy to MuJoCo for simulation transfer (Sim2Sim).
|
|
|
|
It is a reproduction of [go2_rl_gym](https://github.com/wty-yy/go2_rl_gym), adapted to the RobotLab / IsaacLab ecosystem.
|
|
|
|
---
|
|
|
|
<p align="center">
|
|
<img src="resources/go2/isaaclab_scene.png" width="70%"/>
|
|
</p>
|
|
|
|
---
|
|
|
|
## Installation Guide
|
|
|
|
### 1. Install IsaacLab
|
|
|
|
Install IsaacLab v2.3.0 by following the [guide](https://isaac-sim.github.io/IsaacLab/v2.3.0/source/setup/quickstart.html#). Please make sure to clone the IsaacLab repository and perform the installation using the release/2.3.0 branch.
|
|
|
|
After installation, your environment should satisfies:
|
|
|
|
```bash
|
|
isaacsim <= 5.1.0.0 # tested on 5.1.0.0
|
|
isaaclab <= 0.54.3 # tested on 0.54.3, 0.53.1
|
|
isaaclab-rl <= 0.4.7 # tested on 0.4.7, 0.4.4
|
|
```
|
|
|
|
Higher version may cause conflicts with our customized `rsl_rl==3.3.0` and `robot_lab==2.3.0`.
|
|
|
|
---
|
|
|
|
### 2. Install Customized RSL-RL and RobotLab
|
|
|
|
We uses a customized version of `rsl_rl` and `robot_lab`. Install them in editable mode:
|
|
|
|
```bash
|
|
python -m pip install -e source/robot_lab
|
|
python -m pip install -e source/rsl_rl
|
|
```
|
|
|
|
---
|
|
|
|
### 3. Install MuJoCo (Optional, for Sim2Sim)
|
|
|
|
To enable MuJoCo-based simulation:
|
|
|
|
```bash
|
|
pip install mujoco pygame # tested on 3.4.0 and 3.6.0
|
|
```
|
|
|
|
---
|
|
|
|
## Training and Evaluation
|
|
|
|
Run the following commands:
|
|
|
|
```bash
|
|
# Train
|
|
python scripts/rsl_rl/train.py --task=RobotLab-Go2-v0 --headless
|
|
|
|
# Evaluate
|
|
python scripts/rsl_rl/play.py --task=RobotLab-Go2-v0
|
|
```
|
|
|
|
---
|
|
|
|
### Training with RoboGauge Evaluation
|
|
|
|
[RoboGauge](https://github.com/wty-yy/robogauge) provides an asynchronous suite for evaluating motion-control reinforcement learning policies, helping you select the best model. After installing RoboGauge by following the [installation guide](https://github.com/wty-yy/robogauge?tab=readme-ov-file#installation), start the RoboGauge server:
|
|
|
|
```bash
|
|
python robogauge/scripts/server.py --port 9973 --num-processes 32
|
|
```
|
|
|
|
In another terminal, start your training with RoboGauge evaluation enabled:
|
|
|
|
```bash
|
|
# Train
|
|
python scripts/rsl_rl/train.py --task=RobotLab-Go2-v0 --headless --robogauge --robogauge_port 9973
|
|
```
|
|
|
|
Note on Asynchronous Evaluation:
|
|
|
|
Since the evaluation runs asynchronously, the training loop receives the results from the previous evaluation in the next iteration. If evaluation is slower than training, tasks will be queued. Upon training completion, the process will wait for all remaining evaluation tasks to finish before exiting.
|
|
|
|
Performance Example: On a system with an AMD EPYC 7763 and RTX 4090, a full evaluation takes approximately 5 minutes with num_processes=63. Training and saving checkpoints every 500 steps typically takes around 30 minutes.
|
|
|
|
---
|
|
|
|
## Configuration
|
|
|
|
The training pipeline can be configured at two levels: task-level Python configuration files and runtime arguments passed to the training script.
|
|
|
|
### Task-Level Configuration
|
|
|
|
The default task settings are defined in the following files:
|
|
|
|
1. **Environment configuration**
|
|
```
|
|
source/robot_lab/robot_lab/tasks/go2/env_cfg.py
|
|
```
|
|
|
|
2. **RL algorithm configuration**
|
|
```
|
|
source/robot_lab/robot_lab/tasks/go2/rsl_rl_cfg.py
|
|
```
|
|
|
|
3. **Task registration**
|
|
```
|
|
source/robot_lab/robot_lab/tasks/go2/__init__.py
|
|
```
|
|
|
|
### Runtime Overrides
|
|
|
|
In addition to the default configuration files, `train.py` and `play.py` supports several command-line arguments for runtime overrides:
|
|
|
|
```bash
|
|
python scripts/rsl_rl/train.py \
|
|
--task=RobotLab-Go2-v0 \
|
|
--headless \
|
|
--experiment_name <YOUR_EXP_NAME> \
|
|
--run_name <YOUR_RUN_NAME> \
|
|
--num_envs <NUM_ENVS> \
|
|
--checkpoint <PATH_TO_CHECKPOINT>
|
|
```
|
|
|
|
For more details, refer to the [robot_lab repo](https://github.com/fan-ziqi/robot_lab.git).
|
|
|
|
---
|
|
|
|
## MuJoCo Sim2Sim
|
|
|
|
Set the `policy_path` in `deploy/deploy_mujoco/configs/go2.yaml`:
|
|
|
|
```yaml
|
|
policy_path: "{ROOT_DIR}/deploy/pre_train/go2/xxx.pt" # policy.pt exported by running scripts/rsl_rl/play.py
|
|
```
|
|
|
|
Run the deployment script:
|
|
|
|
```bash
|
|
python deploy/deploy_mujoco/deploy_go2.py
|
|
```
|
|
|
|
### Controller Behavior
|
|
|
|
- **Automatic detection**: If a controller is connected, control mode is enabled automatically.
|
|
- **Fallback mode**: If no controller is detected, default commands from the config file are used.
|
|
|
|
### Controller Mapping
|
|
|
|
| Input | Function |
|
|
|------|--------|
|
|
| `LX / LY` | Forward / lateral velocity |
|
|
| `RX` | Angular velocity (steering) |
|
|
|
|
---
|
|
|
|
### Switching Simulation Scenarios
|
|
|
|
Modify `xml_path` in `deploy/deploy_mujoco/config/go2.yaml`:
|
|
|
|
```yaml
|
|
# Flat terrain
|
|
xml_path: "{ROOT_DIR}/resources/go2/flat.xml"
|
|
|
|
# Stairs
|
|
xml_path: "{ROOT_DIR}/resources/go2/stairs.xml"
|
|
|
|
# Boxes
|
|
xml_path: "{ROOT_DIR}/resources/go2/boxes.xml"
|
|
|
|
# Custom
|
|
xml_path: "{ROOT_DIR}/resources/go2/your-custom-scene.xml"
|
|
```
|
|
|
|
---
|
|
|
|
## Differences from `go2_rl_gym`
|
|
|
|
- Different tracking reward formulation (fixed sigma vs. dynamic sigma)
|
|
- Different reward weights (e.g., lower dof_acc_l2 weight in Lab due to physics-step level implementation and sensitivity to outliers)
|
|
- Lack domain_rand: randomize_motor_strength
|
|
|
|
---
|
|
|
|
## TODO
|
|
|
|
- Try replacing ActionManager-level delay with `DelayedPDActuatorCfg` or `UnitreeActuatorCfg_Go2HV`, and make sure the randomization of motor parameters works correctly.
|
|
|
|
---
|
|
|
|
## Acknowledgements
|
|
This repository would not exist without the following open-source projects:
|
|
|
|
- [isaac_lab](https://github.com/isaac-sim/IsaacLab): Unified framework for robot learning built on NVIDIA Isaac Sim.
|
|
- [rsl_rl](https://github.com/leggedrobotics/rsl_rl.git): Reinforcement learning algorithms.
|
|
- [robot_lab](https://github.com/fan-ziqi/robot_lab.git): RL Extension Library for Robots, Based on IsaacLab.
|
|
- [mujoco](https://github.com/google-deepmind/mujoco.git): High-performance CPU physics simulator.
|
|
|
|
Related publications implemented in this repo:
|
|
- [CTS: Concurrent Teacher-Student Reinforcement Learning for Legged Locomotion](https://arxiv.org/pdf/2405.10830)
|