ICT at key stage 3 (Year 9)
Unit 13: Control systems
Section 4: Activity 4
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Objectives |
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- the need for evaluation and refinement to ensure systems are effective
- to develop an understanding of diagnostic techniques
- to test and evaluate the whole system in relation to the specified requirements
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Activities |
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Outcomes |
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Children: |
- Revise with the class the original aim of the system being designed,
eg to safely control the movement of boats in a ride and to take a photograph of the people going down the slide.
- Ask pupils to work in groups to test and evaluate their systems against the design brief. One example of a fault which could be discovered is the incorrect implementation of a counter,
eg the procedure for the end of ride section sensor may add to the counter rather than subtract, or the initial value may not be reset, resulting in no boats moving through the system.
- If the system works as specified, encourage the pupils to evaluate how realistic the system is and how it could be improved,
eg pupils might suggest there would be a number of boats: two new counters would need to be implemented to store information about the number of boats at the beginning and end of the ride.
A more advanced solution might be to develop a closed loop system where the boats are returned to the start.
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- use diagnostic techniques to test systems
- effectively evaluate through constructive criticism of their own systems leading to refinement as required
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Points to note |
- It is possible to test and evaluate the system without a physical model, where the pupils simulate the movement by applying input to the sensors.
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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