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

Questions

  1. If you need to have two different computers communicating over ROS, where should you locate the ROS master node?

A) In the one that has the more recent version of ROS.
B) The ROS master node will run in the first one where you launch the roscore process.
C) You can place the master wherever you want. In one of the computers, you run roscore, and in the other one, you tell ROS that the master node is located in the other machine.

  1. You have a physical robot named mazinger_zeta that accepts geometry_msgs/Twist messages in the /walk topic. What is the correct topic remapping command for remotely controlling the robot with the keyboard?

A) rosrun key_teleop key_teleop.py /walk:=/cmd_vel
B) rosrun key_teleop key_teleop.py /key_vel:=/walk
C) rosrun key_teleop key_teleop.py /walk:=/key_vel

  1. If you apply a speed command of 1 m/s to the Y axis, how will it move GoPiGo3?

A...