Instruction For Real-World Deployment

File Tree

• setup

source install/setup.bash 

• run foxglove node:

ros2 launch foxglove_bridge foxglove_bridge_launch.xml

• run car_sim node:

XLA_PYTHON_CLIENT_MEM_FRACTION=0.3 ros2 launch car_ros2 car_sim.launch.py

• real2sim node:

ros2 launch car_ros2 real2sim_node.launch.py 

Customize Parameters

In car_ros2/utils.py

def load_mppi_params() -> MPPIParams:
    return MPPIParams(
        spline_order=2,
        sigma=0.05,
        gamma_sigma=0.0,
        gamma_mean=1.0,
        discount=1.0,
        sample_sigma=1.0,
        lam=0.1,
        n_rollouts=600,        
        a_min=[-1, -1.], # first dim steer, 2nd throttle
        a_max=[1., 1.],
        a_mag=[1., 1.],
        a_shift=[0., 0.],
        delay=0,
        len_history=251,
        debug=False,
        fix_history=False,
        num_obs=6,
        num_actions=2,
        num_intermediate=7,
        h_knot=8,
        smooth_alpha=1.0,
        dynamics="transformer-jax",
        dual=True, 
        # dynamics="dbm",
        # dual=False, 
    )

Deploy in Real

1. Use nomachine to connect to car:

2. In Desktop:

   • read Joystick signal: ros2 run joy_linux joy_linux_node --ros-args -p dev:=/dev/input/js0
   • run Joystick node: ros2 run carros2 car_joystick_node
   • steer the car
   • turn off joystick
   • run car_node XLA_PYTHON_CLIENT_MEM_FRACTION=0.2 ros2 launch car_ros2 car_real.launch.py
   • run foxglove bridge: ros2 launch foxglove_bridge foxglove_bridge_launch.xml

3. Open 3 separate terminals

• Terminal 1:

    source install/setup.bash
    source ~/f1tenth/install/setup.bash
    ros2 launch lecar_launch vesc.launch.py
    

• Terminal 2 (For Lidar SLAM):

    source install/setup.bash
    source ~/f1tenth/install/setup.bash
    ros2 launch art_f1tenth_interface art_f1tenth_interface.launch.py
    ros2 launch lecar_launch lidar.launch.py
    

• Terminal 2 (For VIO):

```bash source install/setup.bash

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