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6.2.1 | ROBOTICS
01 | WHAT IS ROBOTICS?
Robotics is a branch of computer science that incorporates the design, construction and operation of robots.
It connects programming with electrical and mechanical systems. Software controls how a physical machine behaves; its structure and components determine what actions are possible.
Examples named in the specification include factory equipment, domestic robots and drones.
Robotics is not simply writing a program or assembling a mechanism. It brings these parts together to create and operate a robotic system.
02 | DESIGN: DECIDE WHAT THE ROBOT MUST DO
Design starts with requirements: the task, environment, constraints and intended users.
For a robot moving small objects, designers consider how far it must reach, what it must lift, how it detects the objects and how its movement is controlled.
| Design question | Why it matters |
|---|---|
| What task must be completed? | Defines the required actions |
| What physical conditions apply? | Affects structure, sensing and movement |
| What input is needed? | Guides sensor and interface choices |
| What output is needed? | Guides motor, gripper or other actuator choices |
| What constraints apply? | Sets limits such as size, power, cost and safe operation |
A faster motor is not automatically a better choice if the task needs careful position control. Explain choices through the job.
03 | CONSTRUCTION: BUILD THE SYSTEM
Construction means producing and integrating the robot’s structure, electrical components and control system.
A mobile robot might combine a chassis, wheels, motors, a controller, sensors and an appropriate power supply.
Assembly must allow the components to work together. A sensor needs a suitable position; a mechanism must move as intended; the controller needs appropriate connections and interfaces.
The software is part of the system, not an afterthought. Testing can reveal that either the physical design or the program needs adjustment.
04 | OPERATION: MAKE IT PERFORM THE TASK
Operation concerns how the robot is controlled and used. It includes running programs, receiving commands or sensor information, executing actions and monitoring results.
A robot may be controlled by an operator, follow a programmed sequence or use sensor feedback to adjust its actions. These approaches can be combined.
Calibration, testing and maintenance help the robot continue to perform its intended task. Operation does not always mean the machine runs without any human involvement.
05 | WHAT IS A ROBOT? - THREE PARTS THAT WORK TOGETHER
MECHANICAL
Structure and mechanisms make physical movement possible.
ELECTRICAL
Sensors, controller, actuators and power support sensing and action.
SOFTWARE
Instructions determine how inputs and commands lead to actions.
Example: a gripper needs a mechanism to hold an object, a motor or actuator to move it, and a program that decides when and how to operate it.
Changing one part can affect the others. A heavier mechanism may need different actuation and revised control settings.
The next lesson examines the syllabus’s robot characteristics in more detail.
06 | FACTORY ROBOTS
A factory robot can move tools or products through a programmed sequence. A robotic arm may be fixed to the floor while its joints and gripper move.
Robotics design: choose reach, structure and tooling for the job. Construction: integrate joints, actuators, controller and relevant sensing. Operation: run and test the movement sequence in an appropriate controlled setting.
A robot does not need wheels or a human-shaped body. Moving its mechanism is enough to interact physically with its task.
07 | DOMESTIC ROBOTS
A robot vacuum combines a body, movement and cleaning mechanisms, electrical components and programmed control.
It may use sensors to detect obstacles or boundaries and change its movement according to its program.
Design: fit the intended room conditions. Construction: integrate motors, sensing and cleaning equipment. Operation: carry out cleaning and respond to its inputs.
Its useful behaviour does not require human-like intelligence. Fixed control rules can support robotic actions; more advanced designs may use additional techniques.
08 | DRONES
A drone is an example of a robotic system that can operate in the air. It combines a structure, motors and propellers, a controller and relevant sensors.
An operator may provide commands while onboard control adjusts the motors. Some designs can also follow programmed routes or automated behaviours.
Do not assume every drone is fully autonomous. Remote control and automatic stabilisation can work together.
The example here explains system roles rather than providing flight or legal instructions.
09 | WORKED EXAMPLE: A SMALL MOBILE ROBOT
A classroom robot must travel along a route and stop when it detects an obstacle.
| Stage | Robotics work |
|---|---|
| Design | Choose a stable chassis, movement system and suitable obstacle sensing |
| Construct | Integrate motors, controller, sensor and appropriate power |
| Program | Read the sensor and command movement according to a defined rule |
| Operate and test | Run trials, compare behaviour with the requirement and adjust |
| Maintain | Check the mechanism and sensor so the intended behaviour remains dependable |
The sensor supplies information; the controller executes rules; motors provide movement. The measured environment can affect the next action.
Seeing no obstacle in one trial does not prove all future situations are safe. Testing should cover the intended conditions and failure responses.
10 | ROBOTICS, AUTOMATION AND AI
| Concept | Meaning | Relationship |
|---|---|---|
| Automation | Carry out programmed operations with reduced manual involvement | Includes many systems that are not normally described as robots |
| Robotics | Design, construct and operate physical robots | Can support automated or operator-controlled tasks |
| Artificial intelligence | Simulate intelligent behaviour through computer systems | Can be used in robotics, but is not required for every robot |
A weather logger can automate measurements without being a robot. A robotic arm can follow a fixed sequence without machine learning.
A screen-based chatbot is software, not automatically a physical robot. A humanoid robot may use AI, but its shape does not by itself establish intelligence.
11 | DEFINE AND EXEMPLIFY CLEARLY
Definition: robotics is a branch of computer science incorporating the design, construction and operation of robots.
Example: a factory robot arm brings together a mechanical framework, electrical components and programmed operation to handle parts.
When explaining a robotics example, identify the physical task and how software and hardware cooperate. “It is a machine” is too broad: a machine is not automatically a robot.
12 | COMMON MISTAKES
- Robotics only means programming: design, construction and operation also matter.
- Every robot must look human: arms, vacuum cleaners and drones show otherwise.
- Every robot must have wheels: fixed arms and flying systems do not.
- Every robot must use AI: programmed sequences and feedback can be sufficient.
- Robot means fully independent of people: operator commands and supervision can be involved.
- Every automated device is a robot: the concepts overlap but are not identical.
- Hardware and software can be designed independently without consequence: both must suit the same task.