How do robots work: A beginner's guide

November 28, 2023
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The basics of robotics

Robotics is pretty much a mix of engineering and science that focuses on designing and building machines to perform tasks. Since the development of the first Industrial robot by George Devol in 1954, the field has grown immensely. Most robots are created to complete tasks that are either dangerous, repetitive or too complex for humans.

First coined in 1920 in the Czech Republic, "robot" was first mentioned by playwright Karel Čapek in his play called R.U.R. (Rossum's Universal Robots). It depicted machines made to resemble humans. More than 100 years later, today's robots range from simple automated machines to complex systems equipped with Artificial Intelligence (AI).

AI enables robots to learn from their environment, make decisions, and perform tasks with greater efficiency.

Robots are usually programmed to follow specific instructions, but with advancements in AI, they're becoming capable of adapting to various situations. This evolution means robots are becoming more intelligent and versatile within a variety of industries and daily life.

What types of robots are there?

Industrial robots

These are the powerhouses in factories. An Industrial robot can perform tasks like welding, painting, and assembly. They're known for their strength and efficiency in the manufacturing industry, handling heavy loads and monotonous tasks without getting tired. Industrial robots can be further divided into the following:

  • Articulated robots
  • SCARA robots (Selective Compliance Assembly Robotic Arm)
  • Cartesian robots
  • Delta Robots
  • Cylindrical robots
  • Parallel robots

Humanoid robots

As their name suggests, these resemble human beings. A Humanoid robot can mimic human behavior and actions. They're considered incredibly intelligent robots as they can walk, talk, and even interpret human emotions, making them both fascinating and complex.

Autonomous robots

An Autonomous robot can operate on its own without human intervention. They're regularly used in situations like exploring outer space or underwater, where it may be too risky or impossible for humans.

Robotic arms

A robot arm is similar to a human arm. Like human arms, robot arms are incredibly versatile and can be used to perform complex tasks like surgical procedures or heavy lifting in warehouses. These robots are well known for their dexterity and precision.

Quadruped robots

These are designed to resemble four-legged animals. A primary example would be the robotic dog, "Spot," from Boston Dynamics. A quadruped robot is designed with the ability to move through challenging terrain.

How do modern robots work?

Modern robots are designed to reduce the need for human effort and to enhance efficiency in performing various tasks. They consist of sensors, actuators, and a control system. Sensors allow a robot to analyze its environment. Actuators, like motors and gears, enable movement and action.

Many robots today are designed to work alongside humans, complementing human skills with their precision and endurance. For example, in healthcare, robots assist in surgeries, providing a level of accuracy that a human can't replicate. In manufacturing, they handle tasks that are too dangerous or monotonous for humans.

To add to this, advancements in technology have enabled robots to be remotely controlled, letting humans guide them from a distance. This is a very useful feature for hazardous environments where direct human involvement is risky.

The combination of mechanical, electronic, and software engineering has seen modern robotics become an important part of many industries. They're changing how tasks are performed while improving efficiency and safety.

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How are robots used?

Manufacturing

One of the most popular uses of robots is performing repetitive tasks in manufacturing settings. They handle jobs like assembling products, painting, and welding with precision and speed. Manufacturers love this as it boosts productivity and reduces the risk of injury to human workers.

Healthcare

In the medical field, robots are frequently leveraged to help with surgeries and patient care. They can do specific tasks with a high degree of accuracy and little-to-no error.

Exploration and research

As mentioned previously, robots are very useful when it comes to exploring environments that are inaccessible or dangerous for humans. You'll find them being used in space missions, deep-sea exploration, and in studying natural disasters, operating effectively without a human operator.

Service and assistance

Service robots are very common in homes and businesses. They're good at performing tasks like cleaning, delivering items, and providing information to customers or guests.

Agriculture

In agriculture, robots are used for planting, harvesting, and monitoring crops. They're also used for optimizing the farming process and can reduce the overall need for manual labor.

What do robots excel at? (and what are they not so good at?)

Strengths

  • Precision and consistency: Robots perform tasks with high precision, especially in complex or delicate operations, ensuring consistent quality.
  • Endurance: Unlike humans, a robot can work continuously without breaks, fatigue, or a decrease in performance.
  • Speed: Robots often complete tasks faster than humans, significantly increasing productivity.
  • Safety: They can operate in hazardous environments, reducing the risk to human workers.
  • Cost-effectiveness: Over time, robots save money by increasing output and reducing errors and waste.

Limitations

  • Flexibility: Robots are typically designed for specific tasks and may lack the versatility to adapt to different jobs without reprogramming or retrofitting.
  • Human interaction: While some robots can interact with people, they generally cannot match complex human emotional intelligence and social skills.
  • Initial investment: The upfront cost of purchasing and setting up robots can be high.
  • Maintenance: Every robot needs regular maintenance and updates, which can be costly and require specialized skills.
  • Dependence on power and programming: Robots rely on a continuous power supply and accurate programming to function effectively.

FAQs

Is Siri a robot?

No, Siri isn't a robot. It's actually a form of AI. Siri operates on advanced AI technologies like machine learning and natural language interpretation, but it doesn't have a physical robot form, nor can it perform physical tasks.

What are robots made of?

Robots are made from a variety of materials, including steel, aluminum, hard plastic, and cast iron. The exact materials used vary from robot to robot and are selected according to the machine's application. For example, soft robotics (a newer field) uses flexible materials like elastomers and smart materials, enabling more adaptable and multifunctional robot designs.

Nowadays, innovations like carbon fiber-reinforced composites and shape-memory alloys like nitinol are commonly used.

How many years do robots last?

The lifespan of a robot mainly depends on its type and usage. For example, Industrial robots, which are built for durability, can last around 12 to 20 years with proper maintenance. On the other hand, consumer robots, like those used for household chores, typically last around 5 to 10 years.

Technological advancements can also influence a robot's lifespan.

Can robots work 24 hours a day?

Yes, they can work around the clock, 24/7, as long as they have the required systems and data available. Unlike humans, robots don't experience fatigue or burnout, making them highly efficient for repetitive tasks.

What are robots going to be like in the future?

In the future, we're likely to see robots become more integrated into our daily lives, performing a greater variety of tasks with more efficiency and autonomy. Advances in AI and machine learning will enable robots to better understand their environment and interact with humans more naturally.

Final thoughts

The journey of developing robots has been remarkable, transforming them from mere science fiction into essential tools in our daily lives. The word robot, once just a concept in a playwright's imagination, now represents a vast array of machines that enhance human capabilities across numerous fields.

Robots have become an integral part of society, from performing intricate surgeries to exploring the depths of space. Their evolution continues to both amaze and inspire, promising even more innovative uses in the future. Although there are challenges, such as ensuring ethical use and managing technological advancements responsibly, the potential of robotics is boundless.

However far you decide to delve into the world of robotics, do your best to verse yourself in all the nuances. You'll find yourself appreciating their current contributions, while shaping the future they'll help us build.

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