Mobile Robot

Mobile Robot. Source: Katte 2018.
Mobile Robot. Source: Katte 2018.

Mobile robots can move autonomously that is without any assistance from external human operators. A robot is called autonomous when it can determine the actions to be taken to perform a task, using a perception system that helps it. It also needs a control system to coordinate all the subsystems that compromise the robot.

Mobile robots function using a combination of artificial intelligence (AI) and physical robotic elements like wheels, tracks and legs. Mobile robots are popular in different sectors. They are used to assist with work processes and even accomplish tasks that are impossible or dangerous for humans. Humanoid robots, entertainment pets, drones, and underwater robots are great examples of mobile robots. They are different from other robots because of their ability to move autonomously. These robots have the intelligence to decide based on algorithms it takes input and gives the expected output.

Discussion

  • What are the features of a mobile robot?

    Every mobile robot will incorporate different features that optimize the system to meet a specific goal or to perform a particular task. However, industrial mobile robot systems are mostly used today. They possess several core features that should always be present. These features are:

    • Integrated safety: Safety is the main thing that a mobile robot is
    • Wireless communication
    • Fleet management software
    • FLeet simulation software
    • Integration with supervisory software
  • What are the different types of mobile robots?
    Types of Robots. Source: Robot Park 2016.
    Types of Robots. Source: Robot Park 2016.

    Mobile robots are classified in two ways based on the environment they work in and on the device they use to work.

    • Aerial robots: These are also known as Unmanned Aerial Vehicles (UAVs). They can fly through the air. Eg: drones, helicopters, etc.
    • Land robots: They are also known as Unmanned Ground Vehicles (UGVs). These robots can navigate on dry land and in buildings. They are used to supply equipment. Eg: Dirtdog etc.
    • Underwater Robots: Autonomous Underwater Vehicles (AUVs) are the other name for underwater robots. They can direct themselves and efficiently travel through water. Eg: Wave gliders.
    • Wheeled robots: Wheeled robots are known as Autonomous Intelligent Vehicles (AIVs). These use the wheels for their locomotion. There are different types of wheeled robots like one-wheeled robots, two-wheeled robots, etc.
    • Humanoid robots: They have the shape of a human body. They work majorly with the help of sensors. Eg: Androids, etc.
    • Legged robots: These robots use articulated limbs like legs and follow a mechanism to provide locomotion. Eg: Haxapad robot etc.
  • What are the parts of a mobile robot?
    Parts. Source: Intorobotics 2015.
    Parts. Source: Intorobotics 2015.

    The main components of an autonomous mobile robot are a microcontroller, chassis, motors, and sensors.

    • Microcontroller / SBC:

    A microcontroller is the brain of the robot. Arduino and Raspberry Pi are popular options. Raspberry Pi is a single-board computer (SBC) that can run a full Linux OS. An Arduino is ideal for simple robotics projects. Some microcontrollers are Teensy, BeagleBone, micro: bit, and Raspberry Pi Pico.

    • Chassis:

    The chassis is the body where electronics and motors are mounted. They come in various sizes and materials. Some alternative chassis is made with plastic, metal, wood, or cardboard.

    • Motors:

    Motors are fuel for a robot. Some motors have an inbuilt gearbox to increase torque and drive heavier loads. PWM (pulse-width modulation) controls motor speed.

    • Power:

    The power source is of two types. Use separate power sources for motors and electronics. Another is using a single power source connected to both via a BEC (battery eliminator circuit). USB power banks, battery packs, and LiPo batteries are examples.

    • Sensors:

    Sensors allow the robot to move autonomously. An ultrasonic distance sensor sense an obstruction. An IR sensor detects a dark line.

  • What are the types of sensors used in mobile robots?
    Sensors. Source: Cherubini 2021.
    Sensors. Source: Cherubini 2021.

    Sensors are the eyes of a mobile robot. When combined with sensor software algorithms, sensors allow a robot to understand and navigate the environment, detect and avoid collision with objects, and provide location information about the robot. Exteroceptive sensors visualize the world with cameras, lasers, lidar, radar, sonar, infrared, touch sensors such as whiskers or bump sensors, GPS and proximity sensors.

    Proprioceptive sensors deal with the robot itself. They include accelerometers, gyroscopes, magnetometers, compass, wheel encoders and temperature sensors.

    Some typical sensors used in ground mobile robots and drones include:

    Inertial measurement units (IMUs) combine multiple accelerometers and gyroscopes. They also include magnetometers and barometers. GPS provides latitude, longitude and altitude information. Vision sensors like cameras, both 2D and 3D, as well as depth cameras play an important role in mobile robots. Computer vision and deep learning can aid object detection and avoidance, obstacle recognition and obstacle tracking. Visual odometry and visual-SLAM are becoming more relevant for mobile robots operating in both indoor and outdoor environments.

  • What is the control system used in a mobile robot?

    A robot control system manages commands and directs or regulates the movement and function of various parts of the mobile robot to achieve the desired result. Automatic control is an important requirement for any robotics control installation. The control system of a robot is a feedback control system. It continuously reads from sensors and updates the commands for the actuators to achieve the desired robot behavior. The controller controls and coordinates all aspects of the operation. For high-level performance, the robotics control uses a closed-loop control system like PID controllers, which uses sensor feedback. A feedback control system consists of five basic components like:

    • Input
    • Process being controlled
    • Output
    • Sensing elements
    • Controller and actuating devices
  • what does it make a mobile robot autonomous?

    Autonomous mobile robots act on their own. It is programmed to respond the outside stimuli. These robots have a bumper sensor to detect obstacles. When a robot hits an obstacle, the impact triggers the bumper sensor. The robot's programming tells it to back up and take another direction. Mobile robots often use infrared or ultrasound sensors to see obstacles. More advanced robots analyze and adapt to unfamiliar environments like rough terrain. These robots may associate certain terrain patterns with certain actions. The best example of an advanced robot is NASA's preservance rover.

  • Which areas and sectors can collaboratively mobile robots be applied to?

    The basic function of a mobile robot is to move and explore, transport, and complete complex tasks. They are also used in medicine, surgery, personal assistance, and security.

    Some uses of mobile robots in many areas and sectors such as:

    • Health Care:

    Robotics has the potential to change many health care practices like surgery, rehabilitation, and therapy. Robotics are used in surgeries like cardiac, gynecologic, thoracic, urologic, etc.

    • Agriculture:

    There is a rise in the experimental use of mobile robots in operations like pruning, thinning, mowing, spraying, and weed removal.

    • Food and Beverage Industry:

    Mobile robots are used on stationary conveyor equipment. These robots do offer a high amount of operational flexibility.

    • Manufacturing:

    Robotics is being used in many aspects of manufacturing to increase productivity and efficiency while lowering production costs. Robotic manufacturing technology became safe to operate.

    • Military:

    Robotic technology is being applied in many areas of the military. An unmanned drone is an example. Military drones flying over areas of war and conflict, in hostage situations, and during natural and manmade disasters can assess danger levels and provide soldiers and first responders with real-time information.

Milestones

1942
First Mobile Robot. Source: Kovacs 2010.
First Mobile Robot. Source: Kovacs 2010.

Do you know that robots are used in World War II? Yes, this is the first time that robots are used in real-time war situations. These mobile robots are used as flying bombs to deploy bombs on enemies .

1960
The Hopkins Beast. Source: Alex 2008.
The Hopkins Beast. Source: Alex 2008.

In the present era, we all know that robots can charge themselves when they ran out of power. But this technology was first implemented by Johns Hopkins University. The name of the robot that used this technology is "Beast". One more interesting fact is it uses sound waves to move around .

1976
Viking Program. Source: NASA 2012.
Viking Program. Source: NASA 2012.

Till 1976 robots are used in land and water applications. For the first time, NASA used a mobile robot in a space mission to Mars. The name of the program is Viking program .

1989
BEAM Robotics. Source: Tatwood 2020.
BEAM Robotics. Source: Tatwood 2020.

Mark Tilden used simple analog circuits like comparators instead of microprocessors. He proved that robots can be in the simplest shapes and efficient in doing a task .

1996
Mars Pathfinder. Source: Howell 2012.
Mars Pathfinder. Source: Howell 2012.

After the Viking program, NASA used mobile robots again in its Mars Pathfinder mission. They used the robot in their rover Sojourner to explore the surface of Mars .

1999
Aibo. Source: Sony 2017.
Aibo. Source: Sony 2017.

Sony designed a robot similar to a dog called Aibo. It is the first robotic dog designed by Sony. It is capable of seeing, walking and interacting with its environment .

2002
Roomba. Source: Gordan 2020.
Roomba. Source: Gordan 2020.

Robots are used in wars, on land and water applications, and in space too. Then iRobot organization invented a mobile robot for domestic applications. The name of the robot is Roomba .

2005
Quadruped Robot. Source: Ackerman 2013.
Quadruped Robot. Source: Ackerman 2013.

Boston Dynamics invented a quadruped robot that can carry heavy loads in terrain areas too .

2016
MARCbot. Source: Friscolanti 2016.
MARCbot. Source: Friscolanti 2016.

Mobile robots are used in solving crimes too. US police used a mobile robot named MARCbot. The Multi-Function Agile Remote-Controlled Robot (MARCbot) helped the US police to kill a sniper who killed 5 police officers in Dallas, Texas which raises ethical questions regarding the use of drones and robots by police as instruments of lethal force against a perpetrator.

References

  1. Ackerman, Evan. 2013. "Boston Dynamics Announces New WildCat Quadruped Robot." IEEE Spectrum, October 03. Accessed 2022-04-07.
  2. Alex. 2008. "The Hopkins Beast." Weird Universe, December 22. Accessed 2022-05-22.
  3. Boyd, John. 2017. "Sony Unleashes New Aibo Robot Dog." IEEE Spectrum, November 01. Accessed 2022-04-07.
  4. Brumson, Bennett. 2011. "Robotics in Security and Military Applications." Association for Advancing Automation, July 11. Accessed 2022-05-22.
  5. Brush, Kate. 2019. "mobile robot (mobile robotics)" Tech Target, August. Accessed 2022-04-07.
  6. Cherubini, Andrea. 2021. "Sensor-Based Control for Collaborative Robots: Fundamentals, Challenges, and Opportunities." Frontiers in Neurorobotics, January 07. Accessed 2022-05-22.
  7. Dickson, Ben. 2021. "Inside Boston Dynamics’ project to create humanoid robots." Venture Beat, August 27. Accessed 2022-04-17.
  8. Friscolanti, Micheal. 2016. "The Dallas police 'bomb robot' that killed a sniper." Maclean's, July 08. Accessed 2022-04-10.
  9. Ganguly, Radharenu. 2022. "Robot control system – how do Robots work." Tech-addict, March 21. Accessed 2022-05-16.
  10. Gordan, Whitson. 2020. "Roomba robot vacuums: Everything you need to know." NBC News, October 09. Accessed 2022-04-10.
  11. Harris, Tom. 2022. "How Robots Work." How Stuff Works, January 10. Accessed 2022-05-22.
  12. Howell, Elizabeth. 2012. "Sojourner: Roving on Mars for the First Time." Space, September 25. Accessed 2022-04-07.
  13. Intorobotics. 2015. "40 Autonomous Mobile Robots on Wheels That You Can Build at Home." Intorobotics, August 19. Accessed 2022-04-10.
  14. Katte, Abhijeet. 2018. "Mobile Robots: How Intelligent Systems Are Planned, Structured, Designed." Analytics India Mag, April 12. Accessed 2022-04-25.
  15. King, Phil. 2021. "What You Need to Build Your Own Autonomous Robot." Make use of, June 19. Accessed 2022-04-07.
  16. Kovacs, Andrei. 2010. "MAX-01: Multipurpose Autonomous X-plorer." Research Gate, March. Accessed 2022-04-10.
  17. Krause, Spensor. 2017. "Choosing The Best Sensors For A Mobile Robot, Part One." Fierce Electronics, September 22. Accessed 2022-04-07.
  18. Kumar, Sangeet. 2020. "Industrial Applications Of Mobile Robots." Industry Outlook, September 11. Accessed 2022-05-22.
  19. Kurlekar, Sachin. 2019. "Sensors in autonomous mobile robots for localization and navigation." IoT Agenda, February 08. Accessed 2022-05-22.
  20. Matthews, Kayla. 2020. "Where to spot mobile robots in 2020." Collaborative Robotics Trends, January 14. Accessed 2022-05-22.
  21. NASA. 2012. "Viking Mission Overview." NASA, August 23. Accessed 2022-04-10.
  22. Ohio University. 2021. "5 Industries Utilizing Robotics." Blog, Ohio University, February 11. Accessed 2022-05-22.
  23. Oitzman, Mike. 2019. "The 5 key features for every industrial mobile robot system." Mobile Robot Guide, March 14. Accessed 2022-04-17.
  24. Prakash, Poovika. 2020. "Types of Mobile Robots – What to use where?" Addverb, April 14. Accessed 2022-04-07.
  25. Robot Park. 2016. "All Types Of Robots - By Locomotion." Robot Park, April 26. Accessed 2022-04-10.
  26. Robotics Tomorrow. 2020. "Why Mobile Robots Should be Deployed in Manufacturing Plants?" Robotics Tomorrow, March 13. Accessed 2022-05-22.
  27. Rubio, Fransico. 2019. "A review of mobile robots: Concepts, methods, theoretical framework, and applications." Sage Journals, April 16. Accessed 2022-05-22.
  28. Sony. 2017. "Entertainment Robot "aibo" Announced." Sony, November 01. Accessed 2022-04-10.
  29. Tatwood. 2020. "Robohub Interviews BEAM Robotics Pioneer, Mark Tilden." NREF, February 06. Accessed 2022-04-10.
  30. Vanian, Johnathan. 2016. "Here’s What We Know About the Robot Used In the Dallas Shooting." Fortune, July 09. Accessed 2022-04-07.
  31. Wikipedia. 2021. "Beam Robotics." Wikipedia, March 05. Accessed 2022-04-07.
  32. Wikipedia. 2022. "Mobile Robots." Wikipedia, March 12. Accessed 2022-04-07.
  33. Wikipedia. 2022a. "Roomba." Wiki, March 26. Accessed 2022-05-11.
  34. Wikipedia. 2022b. "Johns Hopkins Beast." Wikipedia, April 05. Accessed 2022-05-11.
  35. Williams, Dave. 2018. "Viking Mission to Mars." NASA, April 12. Accessed 2022-04-07.

Further Reading

  1. L Marques. 2008. "Advances in Mobile Robotics." World Scientific, August. Accessed 2022-04-07.
  2. Gorade, Poonam Sachin. 2018. "Mobile Robotics: Understand The Advent, Present And Future Advancement." Robotics Tomorrow, July 31. Accessed 2022-04-07.
  3. Yu, Jinglun. 2020. "The Path Planning of Mobile Robot by Neural Networks and Hierarchical Reinforcement Learning." Frontiers, October 02. Accessed 2022-04-07.
  4. Gomez, John. 2020. "5 types of mobile robots that are changing the face of warehousing." 6 River Systems, August 18. Accessed 2022-04-07.

Article Stats

Author-wise Stats for Article Edits

Author
No. of Edits
No. of Chats
DevCoins
1
6
517
1576
Words
0
Likes
958
Hits

Cite As

Devopedia. 2022. "Mobile Robot." Version 37, May 23. Accessed 2022-09-22. https://devopedia.org/mobile-robot
Contributed by
2 authors


Last updated on
2022-05-23 14:22:58
  • Autonomous Robot
  • Autonomous Underwater Vehicle
  • Humanoid Robot
  • Robotic Arm
  • Robotic Mapping
  • Self-Driving Technology