Introduction to Robotics

Introduction to Robotics Vikram Kapila, Associate Professor, Mechanical Engineering Outline • • • • • • • • Definition Types Uses History Key components Applications Future Robotics @ MPCRL Robot Defined • Word robot was coined by a Czech novelist Karel Capek in a 1920 play titled Rassum’s Universal Robots (RUR) • Robot in Czech is a word for worker or servant zDefinition Karel Capek of robot: –Any machine made by by one our members: Robot Institute of America –A robot is a reprogrammable, multifunctional manipulator designed to move material, parts, tools or specialized devices through variable programmed motions for the performance of a variety of tasks: Robot Institute of America, 1979 Types of Robots: I Manipulator Types of Robots: II Legged Robot Wheeled Robot Types of Robots: III Autonomous Underwater Vehicle Unmanned Aerial Vehicle Robot Uses: I Jobs that are dangerous for humans Decontaminating Robot Cleaning the main circulating pump housing in the nuclear power plant Robot Uses: II Repetitive jobs that are boring, stressful, or laborintensive for humans Welding Robot Robot Uses: III Menial tasks that human don’t want to do The SCRUBMATE Robot Laws of Robotics • • • • • Asimov proposed three “Laws of Robotics” and later added the “zeroth law” Law 0: A robot may not injure humanity or through inaction, allow humanity to come to harm Law 1: A robot may not injure a human being or through inaction, allow a human being to come to harm, unless this would violate a higher order law Law 2: A robot must obey orders given to it by human beings, except where such orders would conflict with a higher order law Law 3: A robot must protect its own existence as long as such protection does not conflict with a higher order law History of Robotics: I • The first industrial robot: UNIMATE • 1954: The first programmable robot is designed by George Devol, who coins the term Universal Automation. He later shortens this to Unimation, which becomes the name of the first robot company (1962). UNIMATE originally automated the manufacture of TV picture tubes History of Robotics: II 1978: The Puma (Programmable Universal Machine for Assembly) robot is developed by Unimation with a General Motors design support PUMA 560 Manipulator History of Robotics: III 1980s: The robot industry enters a phase of rapid growth. Many institutions introduce programs and courses in robotics. Robotics courses are spread across mechanical engineering, electrical engineering, and computer science departments. Adept’s SCARA robots Cognex In-Sight Robot Barrett Technology Manipulator History of Robotics: IV 1995-present: Emerging applications in small robotics and mobile robots drive a second growth of start-up companies and research 2003: NASA’s Mars Exploration Rovers will launch toward Mars in search of answers about the history of water on Mars Knowledgebase for Robotics •Typical knowledgebase for the design and operation of robotics systems –Dynamic system modeling and analysis –Feedback control –Sensors and signal conditioning –Actuators (muscles) and power electronics –Hardware/computer interfacing –Computer programming Disciplines: mathematics, physics, biology, mechanical engineering, electrical engineering, computer engineering, and computer science Key Components Power conversion unit Sensors Actuators Controller User interface Manipulat or linkage Base Robot Base: Fixed v/s Mobile Robotic manipulators used in manufacturing are examples of fixed robots. They can not move their base away from the work being done. Mobile bases are typically platforms with wheels or tracks attached. Instead of wheels or tracks, some robots employ legs in order to move about. Robot Mechanism Mechanical Elements Sensors •Human senses: sight, sound, touch, taste, and smell provide us vital information to function and survive •Robot sensors: measure robot configuration/condition and its environment and send such information to robot controller as electronic signals (e.g., arm position, presence of toxic gas) Accelerometer Using Piezoelectric Effect •Robots often need information that is beyond 5 human senses (e.g., ability to: see in the dark, detect tiny amounts of invisible radiation, measure movement that is too small or fast for the human eye to see) Flexiforce Sensor Vision Sensors Vision Sensor: e.g., to pick bins, perform inspection, etc. Part-Picking: Robot can handle work pieces that are randomly piled by using 3-D vision sensor. Since alignment operation, a special parts feeder, and an alignment pallete are not required, an automatic system can be constructed at low cost. In-Sight Vision Sensors Force Sensors Force Sensor: e.g., parts fitting and insertion, force feedback in robotic surgery Parts fitting and insertion: Robots can do precise fitting and insertion of machine parts by using force sensor. A robot can insert parts that have the phases after matching their phases in addition to simply inserting them. It can automate highskill jobs. Proximity Sensors Example Infrared Ranging Sensor KOALA ROBOT •6 ultrasonic sonar transducers to explore wide, open areas •Obstacle detection over a wide range from 15cm to 3m •16 built-in infrared proximity sensors (range 5-20cm) •Infrared sensors act as a “virtual bumper” and allow for negotiating tight spaces Tilt Sensors Tilt sensors: e.g., to balance a robot Example Tilt Sensor Planar Bipedal Robot Actuators/Muscles: I • Common robotic actuators utilize combinations of different electro-mechanical devices – – – – – Synchronous motor Stepper motor AC servo motor Brushless DC servo motor Brushed DC servo motor http://www.ab.com/motion/servo/fseries.html Actuators/Muscles: II Pneumatic Cylinder Hydraulic Motor Stepper Motor DC Motor Pneumatic Motor Muscle Wire Servo Motor Controller z z Provide necessary intelligence to control the manipulator/mobile robot Process the sensory information and compute the control commands for the actuators to carry out specified tasks Storage Hardware Storage devices: e.g., memory to store the control program and the state of the robot system obtained from the sensors Computation Hardware Computational engine that computes the control commands RoboBoard Robotics Controller BASIC Stamp 2 Module Interface Hardware Interface units: Hardware to interface digital controller with the external world (sensors and actuators) Operational Amplifiers Analog to Digital Converter LM358 LM358 LM1458 dual operational amplifier Robots in Industry •Agriculture •Automobile •Construction •Entertainment •Health care: hospitals, patient-care, surgery , research, etc. •Laboratories: science, engineering , etc. •Law enforcement: surveillance, patrol, etc. •Manufacturing •Military: demining, surveillance, attack, etc. •Mining, excavation, and exploration •Transportation: air, ground, rail, space, etc. •Utilities: gas, water, and electric •Warehouses Industrial Applications of Robots •Material handling •Material transfer •Machine loading and/or unloading •Spot welding •Continuous arc welding •Spray coating •Assembly •Inspection Material Handling Manipulator Assembly Manipulator Spot Welding Manipulator Robots in Space NASA Space Station Robots in Hazardous Environments TROV in Antarctica operating under water HAZBOT operating in atmospheres containing combustible gases Medical Robots Robotic assistant micro surgery for Robots in Military PREDATOR SPLIT STRIKE: Deployed from a sub’s hull, Manta could dispatch tiny mine-seeking AUVs or engage in more explosive combat. ISTAR GLOBAL HAWK GOLDENEYE Robots at Home Sony SDR-3X Entertainment Robot Sony Aido Future of Robots: I Artificial Intelligence Cog Kismet Future of Robots: II Autonomy Robot Work Crews Garbage Collection Cart Future of Robots: III Humanoids HONDA Humanoid Robot Robotics @ MPCRL: Remote Robot Arm Manipulation Robotics @ MPCRL: Smart Irrigation System Robotics @ MPCRL: RoboDry Robotics @ MPCRL: 4-Legged Hexapod Robotics @ MPCRL: Hexapod for Disaster Recovery Robotics @ MPCRL: Hexapod for Disaster Recovery Robotics @ MPCRL: Robotic Vacuum Cleaner Robotics @ MPCRL: Automated Distinguisher Robotics @ MPCRL: Automated Distinguisher To Explore Further Visit: http://mechatronics.poly.edu