ROS2 SLAM Autonomous Navigation with SLAM Toolbox and Nav2

Use the SLAM Toolbox to generate a map of the environment, then utilize the Nav2 stack for autonomous navigation within that mapped space. Rviz provides visualization of the robot, its surroundings, and ongoing navigation tasks.

Demo Video

Overview

This project provides:

• Gazebo simulation environment.
• ROS2 Control integration to handle the robot’s joints and controllers.
• SLAM Toolbox for online (asynchronous) map building as the robot explores.
• Nav2 stack to plan paths and autonomously navigate in the mapped environment.
• Rviz2 visualization for monitoring robot state, the map, and navigation plans.

Transform frame

Dependencies and Setup

• Install ROS 2 Humble - Read here
• Create Workspace - Read here
• Install XACRO

sudo apt install ros-<distro-name>-xacro 

• Gazebo ROS Packages

sudo apt install ros-<distro-name>-gazebo-ros-pkgs

• ROS2 Control

sudo apt install ros-<distro-name>-ros2-control ros-<distro-name>-ros2-controllers ros-<distro-name>-gazebo-ros2-control

• SLAM Toolbox

sudo apt install ros-<distro-name>-slam-toolbox

• Nav2 and Twist Mux

sudo apt install ros-<distro-name>-navigation2 sudo apt install ros-<distro-name>-nav2-bringup sudo apt install ros-<distro-name>-twist-mux

Building the Package

After cloning this repository into your workspace’s

``` directory:

```sh
cd <your_ros2_ws>
colcon build
source install/setup.bash

Usage

1. Launch the Simulation Run the Gazebo simulation environment and spawn the robot:

ros2 launch ros2_slam_auto_navigation launch_sim.launch.py world_file:=/home/taher/ros2_ws/src/ros2-slam-auto-navigation/worlds/simple.world

1. Launch SLAM and Navigation In a new terminal (with the workspace sourced), launch the SLAM Toolbox and Nav2 bringup with Rviz:

ros2 launch ros2_slam_auto_navigation slam_navigation.launch.py slam_params_file:=/home/taher/ros2_ws/src/ros2-slam-auto-navigation/config/mapper_params_online_async.yaml use_sim_time:=true

1. Use Rviz2 for Visualization: Rviz2 should start automatically from the second launch file. In Rviz2:
   • You can visualize the robot’s pose, sensors, and the map being built.
   • Interactively set navigation goals using the “2D Nav Goal” tool once the map and localization are stable.
2. Autonomous Navigation: Once you have a map (even partial), you can send navigation goals to the robot via Rviz. Nav2 will compute a path and command the robot to reach the desired destination.

Launch Simulator-SLAM-Navigation-RViz commands individually

1. Launching the Simulation Environment

ros2 launch ros2_slam_auto_navigation launch_sim.launch.py world_file:=/home/taher/ros2_ws/src/ros2-slam-auto-navigation/worlds/simple.world

1. Starting the SLAM Toolbox (Online, Asynchronous Mode)

ros2 launch slam_toolbox online_async_launch.py slam_params_file:=/home/taher/ros2_ws/src/ros2-slam-auto-navigation/config/mapper_params_online_async.yaml use_sim_time:=true

1. Initializing the Navigation Stack

ros2 launch nav2_bringup navigation_launch.py use_sim_time:=True

1. Opening RViz with Navigation Visualization

ros2 run rviz2 rviz2 use_sim_time:=True -d /opt/ros/humble/share/nav2_bringup/rviz/nav2_default_view.rviz

Troubleshooting

• Simulation Issues: Ensure that Gazebo, ROS2 Control, and joint publisher packages are correctly installed.

• TF or Robot Description Issues: Check the URDF/Xacro files and the rsp.launch.py to ensure the robot description is being published correctly.

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