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OCS2 Quadruped Controller

This is a ros2-control controller based on legged_control and ocs2_ros2.

Tested environment:

Ubuntu 24.04
- ROS2 Jazzy
Ubuntu 22.04
- ROS2 Humble

*[x] [2025-01-16] Add support for ground truth estimator.

1. Interfaces

Required hardware interfaces:

command:
- joint position
- joint velocity
- joint effort
- KP
- KD
state:
- joint effort
- joint position
- joint velocity
- imu sensor
  - linear acceleration
  - angular velocity
  - orientation
- feet force sensor

2. Build

2.1 Build Dependencies

Before install OCS2 ROS2, please follow the guide to install Pinocchio. Don't use the pinocchio install by rosdep!

After installed Pinocchio, follow below step to clone ocs2 ros2 library to src folder.

cd ~/ros2_ws/src
git clone https://github.com/legubiao/ocs2_ros2

cd ocs2_ros2
git submodule update --init --recursive

cd ..
rosdep install --from-paths src --ignore-src -r -y

2.2 Build OCS2 Quadruped Controller

cd ~/ros2_ws
colcon build --packages-up-to ocs2_quadruped_controller  --symlink-install

3. Launch

supported robot description:

Unitree
- go2_description
- go1_description
- a1_description
- aliengo_description
- b2_description
Xiaomi
- cyberdog_description
DeepRobotics
- lite3_description
- x30_description
Anybotics
- anymal_c_description

3.1 Mujoco Simulation

Warm Reminder: You need to launch Unitree Mujoco C++ Simulation before launch the controller.

source ~/ros2_ws/install/setup.bash
ros2 launch ocs2_quadruped_controller mujoco.launch.py pkg_description:=go2_description

At the first launch, controller may compile the OCS2 model and generate the shared library. The compilation process may take a few minutes. After the compilation, restart the controller and the robot should stand up. Then you can use the keyboard or joystick to control the robot (Keyboard 2 or Joystick LB+A to Trot mode).

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