Book Image

Hands-On ROS for Robotics Programming

By : Bernardo Ronquillo Japón
Book Image

Hands-On ROS for Robotics Programming

By: Bernardo Ronquillo Japón

Overview of this book

Connecting a physical robot to a robot simulation using the Robot Operating System (ROS) infrastructure is one of the most common challenges faced by ROS engineers. With this book, you'll learn how to simulate a robot in a virtual environment and achieve desired behavior in equivalent real-world scenarios. This book starts with an introduction to GoPiGo3 and the sensors and actuators with which it is equipped. You'll then work with GoPiGo3's digital twin by creating a 3D model from scratch and running a simulation in ROS using Gazebo. Next, the book will show you how to use GoPiGo3 to build and run an autonomous mobile robot that is aware of its surroundings. Finally, you'll find out how a robot can learn tasks that have not been programmed in the code but are acquired by observing its environment. You'll even cover topics such as deep learning and reinforcement learning. By the end of this robot programming book, you'll be well-versed with the basics of building specific-purpose applications in robotics and developing highly intelligent autonomous robots from scratch.
Table of Contents (19 chapters)
1
Section 1: Physical Robot Assembly and Testing
5
Section 2: Robot Simulation with Gazebo
8
Section 3: Autonomous Navigation Using SLAM
13
Section 4: Adaptive Robot Behavior Using Machine Learning

Using RViz to check the model while building

Taking into account all the concepts we have introduced about URDF, we can use the RViz tool to assist us while building the robot model. Some checks that it can provide are as follows:

  • The total size of the robot has to match the dimensions of the actual robot. As you build the model part by part, if you make a mistake regarding a part's dimension, an error will arise when you measure the total size (length, width, and height). You can check this by using the measure tool in the RViz toolbar.
  • You can also visually check for possible interference between robot parts, especially between the ones that are adjacent and move relative to each other (in respect to one another).
  • The orientation of the reference frames.
  • You can visualize the parts that are hidden by others by unchecking the corresponding link in RViz or by changing the...