TAILIEUCHUNG - McGraw-Hill - The Robot Builder's Bonanza Episode 2 Part 2

Tham khảo tài liệu 'mcgraw-hill - the robot builder's bonanza episode 2 part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 24 AN OVERVIEW OF ARM SYSTEMS Robots without arms are limited to rolling or walking about perhaps noting things that occur around them but little else. The robot can t as the slogan goes reach out and touch someone and it certainly can t manipulate its world. The more sophisticated robots in science industry and research and development have at least one arm to grasp reorient or move objects. Arms extend the reach of robots and make them more like humans. For all the extra capabilities arms provide a robot it s interesting that they aren t at all difficult to build. Your arm designs can be used for factorystyle stationary pick-and-place robots or they can be attached to a mobile robot as an appendage. This chapter deals with the concept and design theory of robotic arms. Specific arm projects are presented in Chapters 25 and 26. Incidentally when we speak of arms we will usually mean just the arm mechanism minus the hand also called the gripper . Chapter 27 Experimenting with Gripper Designs talks about how to construct robotic hands and how you can add them to arms to make a complete functioning appendage. The Human Arm Take a close look at your own arms for a moment. You ll quickly notice a number of important points. First your arms are amazingly adept mechanisms no doubt about it. They are 371 Copyright 2001 The McGraw-Hill Companies Inc. Click Here for Terms of Use. 372 AN OVERVIEW OF ARM SYSTEMS capable of being maneuvered into just about any position you want. Your arm has two major joints the shoulder and the elbow the wrist as far as robotics is concerned is usually considered part of the gripper mechanism . Your shoulder can move in two planes both up and down and back and forth. Move your shoulder muscles up and your entire arm is raised away from your body. Move your shoulder muscles forward and your entire arm moves forward. The elbow joint is capable of moving in two planes as well back and forth and up and down. The joints in your arm and your .

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