Introduction

31
Introduction to Robotics Analysis, systems, Applications Saeed B. Niku

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Transcript of Introduction

Page 1: Introduction

Introduction to RoboticsAnalysis, systems, Applications

Saeed B. Niku

Page 2: Introduction

Chapter 1Fundamentals

1. Introduction

Fig. 1.1 (a) A Kuhnezug truck-mounted crane Reprinted with permission from Kuhnezug Fordertechnik GmbH.

Fig. 1.1 (b) Fanuc S-500 robots performing seam-sealing on a truck. Reprinted with permission from Fanuc Robotics, North America, Inc.

Page 3: Introduction

What is a Robot ?

Random House DictionaryRandom House Dictionary A machine that resembles a human being and does mechanical routine tasks on command.

Robotics Association of AmericaRobotics Association of America An industrial robot is a re-programmable, multifunctional manipulator designed to move materials, parts, tools, or specialized devices through variable programmed motions for the performance of a variety of tasks.

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What is a Robot ?

A manipulator (or an industrial robot) is composed of a series of links connected to each other via joints. Each joint usually has an actuator (a motor for eg.) connected to it.

These actuators are used to cause relative motion between successive links. One end of the manipulator is usually connected to a stable base and the other end is used to deploy a tool.

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Classification of Robots

- JIRA (Japanese Industrial Robot Association) Class1: Manual-Handling Device Class2: Fixed Sequence Robot Class3: Variable Sequence Robot Class4: Playback Robot Class5: Numerical Control Robot Class6: Intelligent Robot

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Classification of Robots

- RIA (Robotics Institute of America) Variable Sequence Robot(Class3) Playback Robot(Class4) Numerical Control Robot(Class5) Intelligent Robot(Class6)

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Classification of Robots

- AFR (Association FranÇaise de Robotique) Type A: Manual Handling Devices/ telerobotics Type B: Automatic Handling Devices/ predetermined cycles Type C: Programmable, Servo controlled robot,

continuous point-to-point trajectories Type D: Same type with C, but it can acquire information.

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Chapter 1Fundamentals

Robot in the world

Painting Robot in Motor Company

Assembly Robot in Electronic Company

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Chapter 1Fundamentals

Robot in the world

Wearable Robotic Arm and Tele-Operated Robot (KIST)

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Chapter 1Fundamentals

Robot in the world

HONDA (ASIMO) – Biped Robot Fujitsu – Biped Robot (Laptop Size)

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Chapter 1Fundamentals

Robot in the world

Sony (AIBO) – Toy robot

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What is Robotics?

Robotics is the art, knowledge base, and the know-how of designing, applying, and using robots in human endeavors.

Robotics is an interdisciplinary subject that benefits from mechanical engineering, electrical and electronic engineering, computer science, biology, and many other disciplines.

Page 13: Introduction

What is Robotics

History of Robotics

1922: Karel Čapek’s novel, Rossum’s Universal Robots, word “Robota” (worker)

1952: NC machine (MIT) 1955: Denavit-Hartenberg Homogeneous Transformation 1967: Mark II (Unimation Inc.) 1968: Shakey (SRI) - intelligent robot 1973: T3 (Cincinnati Milacron Inc.) 1978: PUMA (Unimation Inc.) 1983: Robotics Courses 21C: Walking Robots, Mobile Robots, Humanoid Robots

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Advantages VS. Disadvantages of Robots Robots increase productivity, safety, efficiency, quality, and

consistency of products. Robots can work in hazardous environments without the

need. Robots need no environmental comfort. Robots work continuously without experiencing fatigue of

problem. Robots have repeatable precision at all times. Robots can be much more accurate than human. Robots replace human workers creating economic

problems. Robots can process multiple stimuli or tasks

simultaneously.

Robots lack capability to respond in emergencies. Robots, although superior in certain senses, have limited

capabilities in Degree of freedom, Dexterity, Sensors, Vision system, real time response.

Robots are costly, due to Initial cost of equipment, Installation costs, Need for Peripherals, Need for training, Need for programming.

Page 15: Introduction

What are the parts of a robot?

•Manipulator

•Pedestal

•Controller

•End Effectors

•Power Source

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Manipulator

• Base

• AppendagesShoulderArmGrippers

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Pedestal

(Human waist)

• Supports the manipulator.

• Acts as a counterbalance.

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Controller(The brain)

• Issues instructions to the robot.

• Controls peripheral devices.

• Interfaces with robot.

• Interfaces with humans.

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End Effectors(The hand)

• Spray paint attachments

• Welding attachments

• Vacuum heads

• Hands

• Grippers

Page 20: Introduction

Power Source

(The food)

• Electric

• Pneumatic

• Hydraulic

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Robots degrees of freedomRobots degrees of freedom

Degrees of Freedom: Number of Degrees of Freedom: Number of independent position variables which independent position variables which would has to be specified to locate all would has to be specified to locate all parts of a mechanism.parts of a mechanism.

In most manipulators this is usually the In most manipulators this is usually the number of joints.number of joints.

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Fig. 1.3 A Fanuc P-15 robot. Reprinted with permission from Fanuc Robotics, North America, Inc.

Consider what is the degree of Fig. 3

1 D.O.F. 2 D.O.F. 3 D.O.F.

Robots degrees of freedom

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Robot Joints

Prismatic Joint: Linear, No rotation involved. (Hydraulic or pneumatic cylinder)

Revolute Joint: Rotary, (electrically driven with stepper motor, servo motor)

Page 24: Introduction

Robot Coordinates

Cartesian/rectangular/gantry (3P) : 3 cylinders joint Cylindrical (R2P) : 2 Prismatic joint and 1 revolute joint

Fig. 1.4

Spherical (2RP) : 1 Prismatic joint and 2 revolute joint Articulated/anthropomorphic (3R) : All revolute(Human arm) Selective Compliance Assembly Robot Arm (SCARA): 2 paralleled revolute joint and 1 additional prismatic joint

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Robot Reference Frames

Fig. 1.6 A robot’s World, Joint, and Tool reference frames. Most robots may be programmed to move relative to either of these reference frames.

Page 26: Introduction

Chapter 1Fundamentals Programming Modes

Robot Characteristics

Physical Setup: PLC Lead Through/ Teach Mode: Teaching Pendant/ Playback, p-to-p

Continuous Walk-Through Mode: Simultaneous joint-movement Software Mode: Use of feedback information

Payload: Fanuc Robotics LR Mate™ (6.6/ 86 lbs), M- 16i ™(35/ 594 lbs)

Reach: The maximum distance a robot can reach within its work envelope.

Precision (validity): defined as how accurately a specified point

can be reached… 0.001 inch or better.

Repeatability (variability): how accurately the same position can be reached if the motion is repeated many times.

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Robot Workspace

Fig. 1.7 Typical workspaces for common robot configurations

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Chapter 1Fundamentals Robot

LanguagesMicrocomputer Machine Language Level: the most basic and very efficient but difficult to understand to follow.

Point-to-Point Level: Funky Cincinnati Milacron’s T3

It lacks branching, sensory information.

Primitive Motion Level: VAL by Unimation™ Interpreter based language.

Structured Programming Level: This is a compiler based but more difficult to learn.

Task-Oriented Level: Not exist yet and proposed IBM in the 1980s.

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Chapter 1Fundamentals Robot

ApplicationMachine loadingPick and place operationsWeldingPaintingSamplingAssembly operationManufacturingSurveillanceMedical applications Assisting disabled individuals Hazardous environmentsUnderwater, space, and remote locations

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Chapter 1Fundamentals Robot

Application

Fig. 1.8 A Staubli robot loading and unloading Fig. 1.9 Staubli robot placing dishwasher tubs

Fig. 1.10 An AM120 Fanuc robot Fig. 1.11 A P200 Fanuc painting automobile bodies

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Chapter 1Fundamentals Robot

Application

Fig. 1.12 Staubli RX FRAMS robot in a BMW Fig. 1.13 A Fanuc LR Mate 200i robot removal operation

Fig. 1.13 The Arm, a 6 DOF bilateral force-feedback manipulator Medical Robot of German


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