Closed-loop control

Term Y11 Mechatronics

Definition

A control system where sensors feed the result back and the algorithm adjusts the output to reach a target (thermostat, cruise control).

Example: Closed: read the sensor, compare with the target, adjust the motor.

Found in: syllabus.

Where it is used in the test

Syllabus area: Y11 Mechatronics.

Question types it can appear in

Multiple choice: Pick the option that matches the definition or example.
Matching or table: Match it to its description, example or category.
Fill in the blanks: Choose this term to complete a statement or table.
Short answer: Define, outline or explain it and tie it to the scenario.
Pseudocode: Control loop with feedback

No past question in this bank is linked to this term yet. It can still be tested through the question types above.

Study links

Flashcard: Closed-loop control in Programming Mechatronics (Year 11) · study that set
Memorise: Mechatronics: hardware, sensors, actuators, control
Notes: Mechatronics: hardware, sensors, actuators, control (Year 11 content (Programming fundamentals, OOP, Mechatronics))

How to use it in an answer

A model sentence

General advice, built from the definition and example above

“A control system where sensors feed the result back and the algorithm adjusts the output to reach a target (thermostat, cruise control).” Then apply it: Closed: read the sensor, compare with the target, adjust the motor.

In a short answer, give the definition in your own words first, then tie it to the situation in the question. Do not copy the example above unless it fits the scenario.

Command words used with it

General advice

No linked question shows the command word for this term. Across the past short answer and pseudocode questions in this bank the words used most are: Explain, Outline, Describe, Compare, Classify, Analyse. Check the actual word in your question.

Technique for the question types

Multiple choice: Read all four options, rule out wrong ones, pick one; no penalty for guessing so never leave blank.
Matching or table: Tick or match each statement to the right column (for example ORM v SQL, SAST v DAST).
Fill in the blanks: Choose the right word from a list; use exact syllabus terms.
Short answer: One clear point per mark, use the stimulus and course terms, and answer the command word.
Pseudocode: Write HSC-style pseudocode: capital keywords, paired END words, indentation; initialise variables; output the required result.

Common mistakes

Marker feedback on other questions of the same type (code and diagram feedback often applies across questions)

Pseudocode questions (2025 HSC exam Q17): use pseudocode control structures accurately; iterate an array and sum it; apply relational operators correctly; use the stimulus to choose the right structures.