Lesson Notes By Weeks and Term v4 - SHS 1
Robot Construction
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Robot Construction
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Subject: Robotics
Class: SHS 1
Term: 2nd Term
Week: 14
Grade code: 1.3.2.LI.2
Strand code: 3
Sub-strand code: 2
Content standard code: 1.3.2.CS.1
Indicator code: 1.3.2.LI.2
Theme: Robot Construction & Programming
Subtheme: Robot Construction
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This lesson focuses on the 'skeleton' of a robot—its physical structure. Just like a house needs a strong foundation to stand in the Ghanaian rainy season, a robot needs a stable and strong structure to perform its tasks without falling apart or tipping over. We will explore the fundamental principles that engineers use to build strong structures, from the Adomi Bridge to the robotic arms used in factories. Understanding these principles is the first step to building a robot that can successfully perform a given task, whether it's helping on a farm in the Volta Region or sorting waste in Accra. This lesson connects directly to physics (forces, stability) and Technical Design.
This section covers the core knowledge required to build effective robot structures. Concept 1: The Robot Chassis and Structure
The chassis (pronounced 'cha-see') is the robot's main frame or skeleton. It is the foundation upon which all other components are mounted, including motors, sensors, controllers (like the Arduino or EV3 Brick), and power sources (batteries). Analogy: Think of the chassis of a 'trotro' or a taxi. It’s the metal frame that holds the engine, wheels, and seats. Without a strong chassis, the vehicle would fall apart on our bumpy roads. A robot's structure serves the same purpose. Concept 2: Principles of Stability
Stability is a measure of how resistant a robot is to tipping over. A stable robot can move, turn, and carry objects without falling. The three most important principles for achieving stability are:
a) Centre of Gravity (CG): The Centre of Gravity is the average location of the weight of an object. For a robot to be stable, its CG should be as low as possible. Explanation: Imagine trying to tip over a bottle of water. It's easier to tip over when it's full and standing up (high CG) than when it's half-empty and lying on its side (low CG). Practical Application: When building a robot, always place the heaviest components (like batteries and large motors) at the bottom of the chassis, as close to the ground as possible.