Book Image

ROS Programming: Building Powerful Robots

By : Anil Mahtani, Aaron Martinez, Enrique Fernandez Perdomo, Luis Sánchez, Lentin Joseph
Book Image

ROS Programming: Building Powerful Robots

By: Anil Mahtani, Aaron Martinez, Enrique Fernandez Perdomo, Luis Sánchez, Lentin Joseph

Overview of this book

This learning path is designed to help you program and build your robots using open source ROS libraries and tools. We start with the installation and basic concepts, then continue with the more complex modules available in ROS, such as sensor and actuator integration (drivers), navigation and mapping (so you can create an autonomous mobile robot), manipulation, computer vision, perception in 3D with PCL, and more. We then discuss advanced concepts in robotics and how to program using ROS. You'll get a deep overview of the ROS framework, which will give you a clear idea of how ROS really works. During the course of the book, you will learn how to build models of complex robots, and simulate and interface the robot using the ROS MoveIt motion planning library and ROS navigation stacks. We'll go through great projects such as building a self-driving car, an autonomous mobile robot, and image recognition using deep learning and ROS. You can find beginner, intermediate, and expert ROS robotics applications inside! It includes content from the following Packt products: ? Effective Robotics Programming with ROS - Third Edition ? Mastering ROS for Robotics Programming ? ROS Robotics Projects
Table of Contents (37 chapters)
Title page
Copyright and Credits
Packt Upsell
Preface
Bibliography
Index

Gmapping and localization in Chefbot


After launching the ROS driver, we can teleop the robot using keyboard teleop. We can use the following command to start keyboard teleoperation:

$ roslaunch chefbot_bringup keyboard_teleop.launch

If we want to map the robot environment, we can start the gmapping launch file like we did in the simulation:

$ roslaunch chefbot_bringup gmapping_demo.launch

You can visualize the map building in Rviz using the following command:

$ roslaunch chefbot_bringup view_navigation.launch

You can build the map by teleoperating the robot around the room. After mapping, save the map as we did in the simulation:

$ rosrun map_server map_saver -f ~/test_map

After getting the map, launch AMCL nodes to perform final navigation. You have to restart all the launch files and start again.

Let's look at the commands to launch the AMCL nodes.

First, start the ROS driver nodes using the following command:

$ roslaunch chefbot_bringup robot_standalone.launch

Now start the AMCL nodes:

$ roslaunch...