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

Grasping using MoveIt!


One of the main applications of robot manipulators is picking an object and placing it. Grasping is the process of picking the object by the robot end-effector. It is actually a complex process because lot of constraints are required in picking an object.

We humans handle our grasping using our intelligence, but in the robot we have to create rules for it. One of the constraints in grasping is force; the gripper/end-effector should adjust the grasping force for picking the object but not make any deformation on the object while grasping.

One of the ROS packages for generating the grasp poses for simple objects such as blocks and cylinders, which can work along with the MoveIt! pick and place pipeline, is moveit_simple_grasps. It's a simple grasp generator. It takes the pose  of grasping object as input and generates the grasping sequences for picking the object. It filters and removes kinematically infeasible grasps via threaded IK solvers. The package provides grasp...