Book Image

ROS Robotics By Example, Second Edition - Second Edition

By : Carol Fairchild, Lentin Joseph, Dr. Thomas L. Harman
Book Image

ROS Robotics By Example, Second Edition - Second Edition

By: Carol Fairchild, Lentin Joseph, Dr. Thomas L. Harman

Overview of this book

ROS is a robust robotics framework that works regardless of hardware architecture or hardware origin. It standardizes most layers of robotics functionality from device drivers to process control and message passing to software package management. But apart from just plain functionality, ROS is a great platform to learn about robotics itself and to simulate, as well as actually build, your first robots. This does not mean that ROS is a platform for students and other beginners; on the contrary, ROS is used all over the robotics industry to implement flying, walking and diving robots, yet implementation is always straightforward, and never dependent on the hardware itself. ROS Robotics has been the standard introduction to ROS for potential professionals and hobbyists alike since the original edition came out; the second edition adds a gradual introduction to all the goodness available with the Kinetic Kame release. By providing you with step-by-step examples including manipulator arms and flying robots, the authors introduce you to the new features. The book is intensely practical, with space given to theory only when absolutely necessary. By the end of this book, you will have hands-on experience on controlling robots with the best possible framework.
Table of Contents (18 chapters)
ROS Robotics By Example Second Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Launching TurtleBot 3 simulation in Gazebo


Before launching TurtleBot 3 in Gazebo, set the environment variable for the Turtlebot 3 model you wish to use in the Gazebo simulation. Either burger or waffle can be selected for the model parameter:

$ export TURTLEBOT3_MODEL=burger

To start the simulation, type the following command:

$ roslaunch turtlebot3_gazebo turtlebot3_empty_world.launch

You should see the words Advertise odom on odom! on the screen and a screenshot similar to the following:

TurtleBot 3 in Gazebo empty world

Now let us try a more interesting scene with objects for TurtleBot to drive around. Use Quit on the Gazebo application from the menu bar and press Ctrl + C in the terminal window to halt the process. If you close the terminal window at this point, make sure that you export the TURTLEBOT3_MODEL variable in a new terminal window.

Now, type the following command to spawn the TurtleBot 3 model on the TurtleBot 3 world map:

$ roslaunch turtlebot3_gazebo turtlebot3_world.launch...