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Robotics

Watch this lesson Video 6.2.1 · 8:04 · What makes a machine a robot, where they are used, and what they cost as well as save

1. The Three Characteristics of a Robot

For a machine to be considered a Robot in the IGCSE context, it must have these three features:

🦾 Physical Structure

It has a body or mechanical parts (arms, wheels, joints).

👁️ Sensory Input

It uses sensors to "see" or "feel" its surroundings.

💻 Programmability

It follows a set of instructions stored in a microprocessor.

2. Common Applications of Robotics

Industry (Manufacturing)

Use: Welding, painting, or assembling cars on a production line.

Benefit: Can work 24/7 with extreme precision and lift heavy parts safely.

Medicine (Surgery)

Use: Assisting surgeons in performing micro-surgeries with tiny incisions.

Benefit: Steadier than a human hand; allows for faster patient recovery.

Dangerous Environments

Use: Bomb disposal, underwater exploration, or space rovers (Mars Rover).

Benefit: No risk to human life if the robot is destroyed.

Domestic (Home)

Use: Autonomous vacuum cleaners or lawnmowers.

Benefit: Saves time for the user on repetitive household chores.

2b. Two More Roles the Syllabus Names

  • Drones (UAVs — unmanned aerial vehicles). Flying robots, either remotely piloted or operating autonomously from a programmed route. Used for aerial photography and surveying, delivering medical supplies to places roads cannot reach, inspecting structures such as bridges, wind turbines and power lines without scaffolding, search and rescue, and monitoring crops. The benefit in nearly every case is reaching somewhere a person cannot easily or safely go.
  • Agriculture. Robots plant, monitor and harvest crops; drones survey fields and identify areas needing water or treatment; autonomous tractors work by GPS. The benefit is precision — treating individual plants rather than whole fields, which reduces the chemicals and water used as well as the labour.

3. Advantages and Disadvantages

Advantages Disadvantages
Can work in dangerous conditions unsuitable for humans. High initial cost to purchase and install.
Perform repetitive tasks with high consistency and no fatigue. Can lead to unemployment as robots replace human workers.
Higher productivity as they don't need breaks or holidays. Require specialist skills to program and maintain.
⚠️ Exam Note: When describing how a robot moves, use the term Actuator. Actuators (motors, solenoids) convert the electrical signals from the microprocessor into physical motion.