ME5413_Final_Project

NUS ME5413 Autonomous Mobile Robotics Final Project

Authors: Christina, Ziggy, Dongen, and Shuo

Dependencies

• System Requirements:
  • Ubuntu 20.04 (18.04 not yet tested)
  • ROS Noetic (Melodic not yet tested)
  • C++11 and above
  • CMake: 3.0.2 and above
• This repo depends on the following standard ROS pkgs:
  • roscpp
  • rospy
  • rviz
  • std_msgs
  • nav_msgs
  • geometry_msgs
  • visualization_msgs
  • tf2
  • tf2_ros
  • tf2_geometry_msgs
  • pluginlib
  • map_server
  • gazebo_ros
  • jsk_rviz_plugins
  • jackal_gazebo
  • jackal_navigation
  • velodyne_simulator
  • teleop_twist_keyboard
• And this gazebo_model repositiory

Installation

This repo is a ros workspace, containing three rospkgs:

• interactive_tools are customized tools to interact with gazebo and your robot
• jackal_description contains the modified jackal robot model descriptions
• me5413_world the main pkg containing the gazebo world, and the launch files

Note: If you are working on this project, it is encouraged to fork this repository and work on your own fork!

After forking this repo to your own github:

# Clone your own fork of this repo (assuming home here `~/`)
cd
git clone https://github.com/<YOUR_GITHUB_USERNAME>/ME5413_Final_Project.git
cd ME5413_Final_Project

# Install all dependencies
rosdep install --from-paths src --ignore-src -r -y

# Build
catkin_make
# Source 
source devel/setup.bash

To properly load the gazebo world, you will need to have the necessary model files in the ~/.gazebo/models/ directory.

There are two sources of models needed:

• Gazebo official models

  # Create the destination directory
  cd
  mkdir -p .gazebo/models
  
  # Clone the official gazebo models repo (assuming home here `~/`)
  git clone https://github.com/osrf/gazebo_models.git
  
  # Copy the models into the `~/.gazebo/models` directory
  cp -r ~/gazebo_models/* ~/.gazebo/models

• Our customized models

  # Copy the customized models into the `~/.gazebo/models` directory
  cp -r ~/ME5413_Final_Project/src/me5413_world/models/* ~/.gazebo/models

Usage

0. Gazebo World

This command will launch the gazebo with the project world

# Launch Gazebo World together with our robot
roslaunch me5413_world world.launch

1. Manual Control

If you wish to explore the gazebo world a bit, we provide you a way to manually control the robot around:

# Only launch the robot keyboard teleop control
roslaunch me5413_world manual.launch

Note: This robot keyboard teleop control is also included in all other launch files, so you don't need to launch this when you do mapping or navigation.

2. Mapping

After launching Step 0, in the second terminal:

# Launch GMapping
roslaunch me5413_world mapping.launch

After finishing mapping, run the following command in the thrid terminal to save the map:

# Save the map as `my_map` in the `maps/` folder
roscd me5413_world/maps/
rosrun map_server map_saver -f my_map map:=/map

3. Navigation

Once completed Step 2 mapping and saved your map, quit the mapping process.

Then, in the second terminal:

# Load a map and launch AMCL localizer
roslaunch me5413_world navigation.launch

Student Tasks

1. Map the environment

• You may use any SLAM algorithm you like, any type:
  • 2D LiDAR
  • 3D LiDAR
  • Vision
  • Multi-sensor
• Verify your SLAM accuracy by comparing your odometry with the published /gazebo/ground_truth/state topic (nav_msgs::Odometry), which contains the gournd truth odometry of the robot.
• You may want to use tools like EVO to quantitatively evaluate the performance of your SLAM algorithm.

2. Using your own map, navigate your robot

• We have provided you a GUI in RVIZ that allows you to click and generate/clear the random objects in the gazebo world:

  

• From the starting point, move to one of the four given destination boxes at the end of the map:

  • Count the number of occurance of each type of box (e.g. box 1, 2, 3, 4, the box numbers are randomly generated)
  • Cross the bridge (the location of the bridge is randomly generated)
  • Unlock the blockade on the bridge by publishing a true message (std_msgs/Bool) to the /cmd_open_bridge topic
  • Dock at the destination box with the least number of occurance

Contribution

You are welcome contributing to this repo by opening a pull-request

We are following:

• Google C++ Style Guide,
• C++ Core Guidelines,
• ROS C++ Style Guide

License

The ME5413_Final_Project is released under the MIT License